Understanding the difference between Hot dipped galvanized and Cold Galvanizing steel

Posted on July 12, 2021 by Galvanizers

Businesses dealing with metals like iron, aluminum, copper and more for the purpose of product development and service-related issues always faces the harsh reality of corrosion a challenge that disrupts the natural flow of these businesses. The process of corrosion highlights a naturally occurring phenomenon where refined metals are naturally converted into more stable composition when comes in contact with air, moisture, humidity and other natural elements to form oxide, sulphide and hydroxide state. These states even though create a more stable composition, but ends up decaying the metal from outside in or inside out. This usually results in weakening of the structure developed with the usage of metal, or result in decaying the metal to such an extent, that it becomes impossible to use the metal for any other function. It is because of the challenges laid down by the process of corrosion on metals, organization’s dealing in metal businesses often have to suffer huge financial losses resulting in loss of goodwill, loss related metal decay and more. It is because of this reason a solution was brought in by metal businesses throughout the globe with the advancement of technology. The solution was galvanization of the metal a solution discovered in 1742 by Melouin a French chemist, where he highlights the application of zinc on the metal surfaces to increase the longevity of the metal. Even though this application of zinc on metal dates back to 2500 B.C. but the discovery of 1742 laid the foundation of exploring the zinc application on metal to the extent where application methods used could result in a change of the timeline for metal longevity. Over the years of technological changes and chemical research two significant approaches of zinc application were discovered, hot and cold dip which functions as a pivotal discovery to today’s galvanization process in the industry.

The approaches to the process of galvanization on metals as signified earlier are of two types they are hot and cold dip galvanizing. Where both the approaches are ideal for protection against corrosion, but it is thoroughly based on your business requirement you should decide which galvanizing process you should take into account to create a protective layer for your metals used in the business.

Let’s take a look at what galvanization is and how hot and cold dip galvanizing differs from each other.

What is Galvanization?

For the common approach of understanding galvanizing process refers to the approach that highlights the application of a zinc coating to the surface of a metal. The usual metal taken into consideration for the process of galvanization are Iron (Fe) and Zinc (Zn). The process of galvanization is principally utilized as a defensive mechanism to prevent corrosion and, likewise, increment the workable existence of the secured metal segment. When appropriately applied to a steel surface, zinc coatings offer two main types of protection: galvanic protection and barrier protection, which in turn increases the longevity of the metal by protecting it against possible corrosion.

Understanding Barrier Protection

Barrier protection signifies the application of zinc on the surface of metal like steel, where the applied zinc hardens over time to create a sheet of layer on the steel. This sheet of layer acts as a protective agent for the steel by conversion of zinc into zinc oxide through the process of surface electrolyte. The hardened zinc oxide layer in turn protects the steel from corrosion against the electrolyte process that usually takes place when the metal comes in surface contact with air and moisture. This protection layout of barrier protection usually takes place because zinc oxide is impervious to moisture and air. This results in preventing the underlying steel to come in contact with air and moisture, which in turn prevents it from further corrosion and increasing its life to a great extent.

Understanding Galvanic Protection

Galvanic protection, also known as cathodic protection, protects the underlying steel substrate by corroding preferentially, thus sacrificing itself in the process. This sort of protection is particularly helpful for circumstances where the protected steel may get exposed because of scratches, cuts, marks or loss of coating due to rigorous usage. Since zinc is an exceptionally receptive and electronegative metal, it will assume the role of the anode, which will result it to be corroding first in an event where the steel underneath get exposed to surface contact. This process of approach by zinc will continue to offer galvanic protection until the coating is entirely consumed. This in turn protect the underlying steel for a longer period of time safeguarding it from exposure surface electrolyte process because of chemical balance that has created an equilibrium because of chemical approach that has been applied in covering the steel in the galvanic process, unlike that of barrier protection, where sheet layer removal can expose the steel to vulnerability.

This chemical approach to protection under galvanic process is divided into particular application methodology they are hot and cold dip galvanizing process. Let’s take a look at how each of these processes functions and how they provide protection to the underlying metal.

Hot Dip Galvanization

Hot-dip galvanizing process is one of the most used application of galvanizing process. This process highlights coating a steel or iron object by submerging it into a bath of molten zinc. The bath of molten zinc showcases temperatures around 840°F (449°C). Once removed from the bath, the zinc coating on the iron or steel’s exterior reacts with oxygen in the atmosphere to form (ZnO) Zinc oxide. This Zinc oxide further reacts with carbon dioxide in the atmosphere to form a more compact protective layer known as (ZnCO3) Zinc carbonate. This Zinc carbonate reflects a dull grayish film, which is relatively stable and adheres tightly to the surface of the steel or iron. This results in the hot-dip galvanizing process to create a chemical balance, which ensures that the zinc is chemically bonded to the underlying metal and becomes part of the steel or metal that is being protected through the hot dip galvanizing process.

How Hot Dip Galvanization is performed

Though the concept of hot-dip galvanizing may seem simple, the process consists of several crucial steps. The steel first goes through three cleaning stages to prepare its surface for galvanizing; these are degreasing, pickling and fluxing. Degreasing is used to remove dirt, oil and other organic residues; a mild acid bath, or pickling, etches the steel and removes mill scale and iron oxide; and fluxing further removes any oxides and coats the steel with a protective layer that prevents the formation of further oxides on the steel surface prior to galvanizing. Once the cleaning process is completed, and the structure has dried, it is ready to be immersed into the molten zinc bath. Molten zinc flows in and around the iron or steel object, thus thoroughly coating it to protect all surfaces. The coated material is then removed from the bath and air-dried before inspection.

Cold Dip Galvanization

Cold dip galvanizing is comparatively a much simpler process. The cold dip galvanizing process showcases application of a zinc-rich paint to the surface of a metal or steel element to protect it from corrosion. As such, the term “cold galvanizing” is considered to be a misnomer among some professionals in the coating industry. Zinc paints may be applied by brushes, rollers, spray guns, etc. Coatings may also be applied by the electro galvanizing:”Electro galvanizing is an electroplating technique used to place a layer of zinc metal on top of a steel surface. It involves immersing a steel component into a solution containing zinc salts followed by the application of electricity to induce an electrochemical reaction on top of the steel. The cold dip approach in comparison to hot dip galvanization process, the electro galvanizing approach provides a thinner coating and more aesthetic appearances.” method as well. The zinc-rich paints used in cold galvanizing are different from conventional coatings due to the presence of a binding compound. These binders allow the zinc to mechanically bond to the steel to offer an effective level of protection.

How Cold Dip Galvanizing is performed

Like hot-dip galvanizing, cold galvanizing can provide barrier protection and also some degree of cathodic protection. However, the zinc dust present in the paint or coating must be in high enough concentrations to promote electrical conductivity between the steel and the zinc. The surface preparation required for applying zinc-rich coatings is less demanding than hot-dip techniques. Before coatings operations begin, the surface of the steel must be clean and dry. Usually, a wire brush is first used to remove rust or any other corrosion products that may be present. Dirt, grease, chemicals and other organic compounds must also be removed accordingly. Once the surface is prepared, the zinc coating is applied to the surface in as many coats as required.

The introspection across both hot dip and cold dip galvanizing process clearly showcases how each of the approach is thoroughly different from other even though the processes aims at a common resolution of protecting metal from corrosion. The introspection throw light on how the hot dip is a chemical approach and more long lasting, while cold dip is a more physical surface contact approach, but less consistent in comparison to hot dip.

If you are into metal businesses related to services and product then galvanization process is a must for your organization. The choice of your galvanizing approach for your metal thoroughly depends on your organizational requirement, however if you want to know more about galvanization and which approach will compliment your business, please get in touch with us.

Why Choose Us

At Galvanizer our team work relentlessly to come up with innovation’s that can deliver you ultimate experience of galvanized products. Our multi-lateral testing and development process ensures delivering our client premiere quality of galvanizing process. With decades of industry experience we offer nothing but the best. We provide assistance in helping you select the best solution for your metal business. To know more on service and business-related inquiry get in touch with us.

Galvanizing Steel Is Sustainable And A Must For Your Business

Posted on June 15, 2021 by Galvanizers

Businesses all around the world are shifting towards the use of steel rather than iron for a more durable and long lasting structure. One of the main reasons behind this is the longevity that comes with galvanized steel and quality that galvanized delivery even when it comes in contact with reactive agents. It is because of these long lasting properties of galvanized steel along with its noble property it is used and opted across different industries. If you are into business where requirement of durable metal is a must, then you should look forward to invest in galvanized steel for sustainability and larger flexibility for your business.

Let’s introspect what is galvanized steel and why it is a must for your business.

What is Galvanized Steel?

Galvanized steel is a type of metal that has been developed by coating layer of zinc onto steel. This coating of zinc on to steel is carried out using two galvanizing process hot dip galvanizing and cold galvanizing. In either of cases Galvanized steel is developed with the purpose of protecting against rust and corrosion. It is based on the requirement of business one should select wisely whether to use hot or cold galvanized steel to fulfill their business requirement.

How Galvanized Steel provides Benefits and Flexibility to your Business

Galvanized steel has multiple usages in a business and can be used to replace even other materials that are deemed expensive or damaged. The supplement of galvanized steel not only provides economical resolution but also provide larger flexibility to business because of its properties. Some of the major benefits of using Galvanized steel are reflected below:

Sustainability
Durability
Proven Quality
Cost Effectiveness
Honesty
Reliability
Complete Coverage
Predictability
Triple protection
Toughness
Faster Turnaround

These benefits signified by the galvanized steel ensure a quality advantageous position for your business. Let’s introspect how each of these quality ensure sustainability of galvanized steel, making it a must for your business.

Sustainability of Galvanized Steel

The long-term durability provided by galvanizing is achieved at relatively low environmental burden in terms of energy and other globally relevant impacts. One of the main reason behind this being non galvanized steel or other metals has to be maintained from time to time against corrosion and followed up with color to ensure long lasting vendetta. The usage of galvanized steel ensure protection against corrosion resulting in lower maintenance cost ensuring usage of the budget elsewhere, while protecting the environment from harmful fumes of re-coloring over and over again.

Durability of Galvanized Steel

A galvanized coating is one of the most durable forms of corrosion protection on the market. One of the main reasons behind this is galvanized steel ensures removal all kind of impurities from within the steel. Further, with the process of galvanizing, steel results in getting an additional coating of 85mm if the steel used is 6mm thick. This 85mm coating is corrosion proof against majority of rusting and corrosive agent for a long period of time, making the galvanized steel long lasting and durable.

Proven Quality of Galvanized Steel

Galvanizing is all around us, with the galvanizing of steel different industry recording increased production over the years. From the smallest to the largest elements, galvanized steel define itself from time to time as trustworthy and reliable, with a track record and proven performance, which is rigorously tested through expert monitoring and performance data collection defining 0.01m² corrosion rates for every 10km².

Cost Effectiveness of Galvanized Steel

The cost of protecting steel from corrosion takes into consideration two important elements, the initial cost of protection and the lifetime cost. On a comparison scale of coloring to that of galvanizing the cost of galvanizing showcases 35% lower lost based on average of initial cost and life time cost. This results in large scale saving for businesses in long run resulting in a cost effective solution for the business.

Honesty of Galvanized Steel

The metallurgical bond that is framed when steel is plunged into liquid zinc; an aroused covering offers direct, secure assurance consistently. Hot galvanizing sans uncontaminated steel for the rusting cycle to reappear, it is because of this reason failure from underneath with galvanizing steel is almost impossible, making the galvanized steel an ideal material for all season. This surety of protection ensures a consistent honesty of with the usage of galvanized steel.

Reliability of Galvanized Steel

Galvanizing of steel is a relatively controlled process. This makes the coating a consistent, process. It is because of this reason galvanizing steel is most reliable when it comes to corrosion protection. It is mainly because galvanizing is a metallurgical process that creates a metallurgical bonding rather than chemical or mechanical bonding making the zinc and steels a single structure. This ensures a thorough reliability with galvanized steel.

Complete Coverage of Galvanized Steel

Galvanizing creates a metallurgical bond between steel and zinc, forming a coating that will last for generations. This provides superior strength besides superior coverage, so that galvanized steel structures remain protected, even in their most vulnerable areas. This ensures that the structure is protected from inside out even in case of exposure to extreme corrosive condition, providing complete coverage with the usage of galvanized steel on any structure.

Predictability of Galvanized Steel

Galvanized coating on steel showcases a predictable protection against corrosion weather in a linear fashion. The thicknesses of the coating are measurable and offer life spans that can be relied on and forecasted easily. Using this methodology forecasting for coating thickness based on gauge size of the steel and linear predictability calculating possible of corrosion if any is much easier in galvanized steel, making it ideal for usage and predictable for types of usage.

Triple Protection of Galvanized Steel

The usage of galvanized steel ensures triple protection with its usage in the following ways:

Physical Barrier: A galvanized coating provides a physical barrier which is metallurgically bonded, and prevents the underlying steel from being exposed to atmospheric conditions.
Sacrificial Protection: A galvanized coating will corrode preferentially and slowly highlighting cathodic protection. It is because scratches on galvanized steel do not require repair work, and in case areas do become exposed to humidity and other corrosive elements, the galvanized coating will corrode preferentially and at a slower rate than the underlying steel.
Prevention of sideways creep: In the unusual event that a galvanized coating is locally compromised and bare steel is exposed, the zinc coating will limit damage and prevent a form of corrosion known as sideways creep, which in turn will protect the steel by slowing down the overall corrosion process.

This highlights the triple approach to protection with the usage of galvanized steel.

Toughness of Galvanized Steel

Galvanizing has an abrasion resistance up to ten times better than organic paint coatings. The hot dip process is unique, producing a coating which is bonded metallurgical to the steel. As a result, galvanized steel has superior resistance to mechanical damage during handling, storage, transport and erection. This unique metallurgical bonding ensures compact toughness to the galvanizing steel making it in uniquely applicable for all possible requirements.

Faster Turnaround for Galvanized Steel

Galvanizing is not a time-consuming process and in reality, it takes just a few minutes to dip prepared steel work into molten zinc to form a durable, reliable coating. This in turn makes the availability of galvanized steel much faster compared to other metals making it an ideal material for usage since it has a fast turnaround time.

Other than these major benefits that your business can have with the usage of galvanized steel, it also reflects other major advantages as below:

Low initial cost
Longevity
Sacrificial anode
Multiple approach to galvanizing process as per requirement

With these additional advantages over the existing benefits highlighted above it is clearly visible how galvanized steel can provide a sustainable solution to a business ensuring it a must requirement in business for greater flexibility and edge over natural agents & calamities and other business competitors.

If you are looking for galvanized steel requirements in your business, then look no more come to us at galvanizer for best in quality galvanized steel.

Why Choose Us?

At Galvanizer our team work relentlessly to come up with innovation’s that can deliver you ultimate experience of galvanized products. Our multi-lateral testing and development process ensures delivering our client premiere quality of galvanizing process. With decades of industry experience we offer nothing but the best. To know more or to order from us get in touch with us.

Perks of Galvanizing Crash Barriers with us

Posted on May 20, 2021 by Galvanizers

We all have come across a metal fence on a highway or at the side of road or on motor way in our daily life. But ever wonder; what is the purpose of that metal fence which we see or what it is called. Well that metal fence is known as Crash Barrier. From the name we can easily make out that its purpose is to handle crashes. But in reality the truth is far away, the actual purpose of the metal fence is decapitate the impact of the crash, which in turn helps in saving the lives of the people involved in the crash. Further these crash barriers also helps in dividing pedestrian walking aisle from that of the street, protecting the pedestrian from an oncoming crash by decapitating the impact of the crash from moving on to the walking aisle.

It is because of this reason selecting a perfect galvanizing organization to serve the purpose of making crash barrier is so critically important, since it take into account life saving measures for car drivers as well as pedestrians.

At Galvanizer, we are oath bound to provide our customers with best quality crash barriers that would serve their purpose. Let’s take a stroll through what we at Galvanizer has to offer our customers.

Our Choice of Metal

In order to ensure development of the premiere quality of crash barrier we have tested many different types of metal that suits the crash barrier needs. The choice of metal is thoroughly dependent on the place of its installment and the types of crashes that the barrier may have to encounter. However based on our entire testing process we have come across Iron and Steel rebate as the strongest material for the purpose of developing our crash barrier. The rebate of Iron ensures strength and stability in our crash barrier, while Steel contributes to flexibility and durability of time. This rebate metal is then galvanized to BS EN 1461 a standard set by crash testing process of UK, the highest tensile crashing testing process in the world. This allows us to provide you with best in quality crash barrier for your usage.

Our Process of Development

The choice of rebated metal selected for the purpose of developing crash barrier goes through multiple stages of hammering and touting process in our workshop. This allows the metal to be compact and more durable with adequate flexibility, which it needs to decapitate crashes. Once final metal is ready at Galvanizer we re-shape the metal into required contingent demanded by our customers to satisfy their requirement. This metal is then hot dipped in liquid zinc to create an added layer of coating on the metal crash barrier. The galvanizing process at galvanizer ensures taking into consideration that at no given time of dipping process the liquid contains not more than 2 % of other metals in the zinc dip. This ensures a proper galvanization of the crash barrier getting it ready for long lasting performance against natural tides like rusting and corrosion. The coating process also ensure through testing of the metal through hot dip and immediate cooling, which allows release of any oxygen bubble that might be trapped in the metal due to the galvanizing process. This provides the crash barrier with its long lasting, performance enduring capacity.

The clear choice of perfect metal and proper development process with thorough testing is what makes Galvanizer as an organization stand-out in the market. It is majorly because we believe in delivering our promises. Let’s take a look at what you get when you galvanize your crash barrier from us:

Merits of Galvanizer Crash Barriers

At Galvanizer our added protection against corrosion and rusting through hot dip galvanizing ensures that the products are tested against time and natural elements. Our challenging development and testing process ensure quality of the crash barrier highlighting the following major benefits:

Our galvanizing process ensure longer life to your crash barrier
We delivery multi-layered coating to ensure protection against the toughest of crashes
A cheaper choice of coating – that allows our client’s to save large amount of cash
An eco-friendly forestall to ensure protection against corrosion
Our galvanizing approach ensures creation of minimum wastage
It provides the crash barrier with flexibility of re-usability
Maintenance cost is extremely low
Cleaning the surface of the crash barrier is extremely easy

These benefits assure a thorough value of money when galvanizing crash barrier with us.

Why Chose Us

At Galvanizer our team work relentlessly to come up with innovation’s that can deliver you ultimate experience of galvanized products. Our multi-lateral testing and development process ensures delivering our client premiere quality of galvanizing process. With decades of industry experience we offer nothing but the best. To know more or to order from us get in touch with us.

How does hot dip galvanizing affect steel strength?

Posted on April 30, 2021 by Galvanizers

Galvanization is said to influence the rigidity and execution of these high-tractable evaluations of steel. A testing program was performed to guarantee the accessibility of verifiable information. This program included galvanizing these prepare to build up the impact of hot-plunge galvanization on their underlying presentation.

“Here are listed below the various tests under taken and the results has been shown below along the method they have used”.

Method:

The test system included cutting eleven pieces from a 3.0mm thick dark HA70T-P steel curl. Six of the pieces were hot-dunk excited as per AS 4680-1999.

Results:

Averaging of the aftereffects of the yield qualities of the uncoated segments and the outcomes for the aroused segments of the HA70T-P demonstrated a distinction of 0.4%. As this variety is under 1%, it is viewed as inside the inspecting and testing methods' exactness resistance.

Method:

The test technique included cutting six pieces from a solitary length of a roll-shaped Z25024 purlin, which had been rolling framed by BHP Building Products. The steel thickness was 2.4 mm. Three of the pieces were corrosively cured (to eliminate the Z350 factory-applied zinc covering), and hot dunk electrifies as per AS 4680-1999.

The leftover pieces were left in the plant applied Z350 Zinc covering (as moved) finish.

Results:

Averaging the aftereffects of the uncoated areas' yield qualities and the outcomes for the exciting regions of the Galvaspan G450 showed a distinction is 0.6%.

As this variety is under 1%, it is viewed as inside the inspecting and testing methodology& resistance.

System:

Samples from various distinctive steel warms, in sizes of 12, 24 and 36 mm distance across with both Tempcore and mico-alloyed science were tried, with tests electrifies in both straight lengths and subsequent to twisting. Control tests from each bunch were tried related to the aroused examples.

Results:

Averaging the aftereffects of the OneSteel 500Plus building up bar yield qualities demonstrated a little expansion in yield strength from 592 MPa to 602 MPa or 1.45%, subsequent to electrifying the building up bar. This variety is inside as far as possible for this item.

Conclusion:

The interaction has its inclination and worries towards the advancement of steel. Furthermore, to bring to your notification, there is no impact on steel strength.

Importance of Galvanizing Steel

Posted on April 2, 2021 by Galvanizers

The galvanization process:

The galvanization process is an assembling interaction where zinc covering is applied to steel or iron to offer insurance and forestall rusting. A few electrifying cycles are accessible, yet the most usually offered and utilized strategy is hot-plunge arousing.

Galvanized steel is among the most famous steel types due to its all-inclusive toughness, having the strength and formability of steel in addition to the consumption insurance of the zinc-iron covering. The zinc secures the base metal by going about as a boundary to destructive components. The conciliatory idea of the covering brings about a durable and top-notch steel item.

The galvanized steel carries out these following steps:

The steel is cleaned in a degreasing arrangement
After the cleaning, the steel dipped in salt by being brought down into a tank of weakened hot sulfuric acidic liquid.
The steel is then fluxed in a fluid arrangement
After the transition, the steel is excited through submersion in a tank of liquid zinc
A while later, the steel is assessed for consistency, and a total covering

Advantages of galvanized steel:

Low introductory expense: Contrasted with most treated prepares. Likewise, galvanized steel is promptly ready to utilize when conveyed. It doesn’t need extra planning of the surface, reviews, painting/coatings, and so forth, saving organizations more expenses on their end.

Longer life: With galvanization, a piece of industrial steel is required to last over 50 years in normal conditions and can last more than 20 years with profound water openness. There is no support necessary. The expanded toughness of the steel’s done item additionally builds the item’s unwavering quality.

Rust resistance: The iron components in steel are inconceivably inclined to rust; however, the expansion of zinc goes about as a defensive cradle between the steel and any moisture or oxygen. Galvanized steel is highly defensive, including sharp corners and breaks that couldn’t be secured with different coatings, making it impervious to harm.

Importance of Galvanized steel:

Full protection for damaged areas: Galvanized coatings erodes, especially to steel, giving cathodic or sacrificial security to little areas of steel uncovered through harm. In contrast to natural coatings, little harmed regions need no final detail.

Complete security: Every piece of a galvanized article is ensured to get protection, even breaks, sharp corners, and unavailable areas. No covering applied to construction or creation after fulfillment can give a similar assurance.

The simplicity of investigation: Galvanized coatings are evaluated promptly by the eye, and basic non-destructive thickness testing techniques can be utilized. The galvanizing cycle is to such an extent that if coatings seem sound and persistent, they are sound and continuous.

Conclusion:

Discovering the best administrations/services of Galvanizing Steel? stress less, we here give you the best Galvanizing cycle to advance your nature of steel, venture forward to us for the best administrations/services.

Importance of Crash barrier Hot Dip Galvanizing

Posted on February 23, 2021 by Galvanizers

What is Hot Dip Galvanizing?

The process of zinc coating on steel and Iron is known as Hot Dip Galvanizing. This process is widely followed to increase the life of the base metal and to ensure that the base metal does not rust with time. Be it a fabricated or an unfabricated piece of metal, the molten zinc is used to coat the base metal at about 840 degree Fahrenheit while performing a Hot Dip Galvanizing.

What is Crash Barrier?

Crash barrier is a strong fencing system used usually to barricade roads to avoid accidents or crashes. These fencings are made of solid metals acting as strong protection by the sides.

How does a galvanized crash barrier more efficient?

Galvanizing the crash barriers is the smartest option versus any other paint-on options. This process of galvanizing makes the crash barriers more durable and stronger as it gives a complete coverage. The zinc coat also makes the fences more absorbent to shock as these are abrasion resistant. Galvanizing the barriers also helps as the zinc coating grows parallel on the steel making the edges and corners the same thick.

Crash barrier hot-dip galvanizing acts as an extra protection when a sudden major accident takes place. This is more in demand when fencing on the highways to avoid fatal incidents.

Be a part of the environment

Zinc as being a renewable resource and available in abundance makes it more environment friendly option. Also, in the process of galvanizing the zinc does not lose its properties making it even more recyclable.

Crash Barrier is of different types including Roadside, Median, Bridge and work zone barriers.

Galvanizers make it easy for you to get the safest and the most affordable Crash barrier hot-dip galvanizing possible. They followed a step by step process to ensure galvanizing done right, keeping it safe being on the road. They ensure the best quality of hot-dip galvanizing making it possible for the crash barriers to sustain longer in extreme exposure to the environment.

Key Considerations for Hot Dip Galvanizing

Posted on November 5, 2020 by Galvanizers

Hot dip galvanizing is a process where a piece of base metal is immersed into a bath of molten zinc for enhancing the durability and functionality of the base metal. After the completion of the hot dip galvanization process, the base metal is resistant to corrosion and hence appropriately suitable for the intended purpose of use. But the users need to make sure to choose a trusted, reputed, and reliable service provider so that the best practices are followed for the optimum quality galvanizing. One of the most important rules to be followed during the process is that the designer, fabricator, as well as the galvanizer should work together. An appropriate three-way communication plays a vital role in the elimination of most of the problems in the hot dip galvanization process.

To make the entire process smooth and hassle free, we have listed a few of the key considerations for the hot dip galvanizing process.

Removal of Soil and Grease – Oil, grease, shop oil, and soluble paints are to be removed from the base metal with the help of a hot alkaline cleaner. On the other hand, soils like vinyl, epoxies, welding slag, and asphalt should be removed by grit blasting or other mechanical process of cleaning.

Pickling – It is the process of chemically cleaning the surface of the base metal. An acid bath is used for the removal of rust and mill scale for providing a chemically clean surface of the base metal. It would be ideal to use hydrochloric acid since it is more environment friendly and does not affect the surface of the base metal.

Prefluxing – The base metal which is usually steel needs to be immersed in a liquid flux for the removal of oxides and prevent oxidation before finally dipping it into the bath of molten zinc. It would be ideal to use zinc ammonium chloride solution for Prefluxing process.

Galvanizing – The prepared base metal then needs to be immersed into a bath of molten zinc at about 455 degree Celsius or 850 degree Fahrenheit to ensure appropriate metallurgical bonding of zinc to the base metal.

Finishing – Once the metal is withdrawn from the molten zinc bath, it is essential to remove the excess zinc by draining, vibrating, or centrifuging. Next, it is important to cool the galvanized item in air or by quenching in water. The air quenching process takes a bit longer as compared to the water quenching method but it results in a much better surface finish, and hence an important consideration in architecturally exposed steel.

Checking or Inspection – Checking or inspection of the final product is the ultimate step as well as consideration in the hot dip galvanizing process. In this step, the thickness and the surface conditions are checked for meeting the quality criteria.

All these key considerations mentioned above would make sure that the base metal is appropriately galvanized. In this regard, it would be ideal to call in for the helps of a professional service provider for getting the best solutions. In this situation, Prashant Galvanizers would undoubtedly the ideal choice. With several years of experience in this field, Prashant Galvanizers makes sure to provide optimum quality galvanization so that none of the users get even a single chance to complain. So, for all your galvanization requirements, get in touch with the team of Prashant Galvanizers at the earliest.

Hot dip galvanizing for corrosion control

Posted on September 21, 2020 by Galvanizers

Corrosion is an electromagnetic process. Corrosion destroys the metal, the colour changes and it becomes weak, easily breakable. Steel is at risk when it reacts with other elements such as oxygen, carbon dioxide, hydrogen, and bacteria, dirt. It forms rust over the metal and the duration of further degradation of the metal depends on the immediate climate in the surrounding. Hot-dip galvanizing controls and protects the iron from corrosion.

Why hot-dip galvanizing?

It is essential to prevent the iron from rust. To protect, a layer or a barrier has to be created or added in between the iron and the atmosphere. Then only the iron will be secured from the harmful elements and it won’t corrode. One such process that can prevent the iron from rusting, corrosion, is hot-dip galvanizing. Hot-dip galvanizing acts as a barrier between the atmosphere and iron.

Hot-dip galvanizing process

In hot-dip galvanizing, the coating of steel happens at a temperature of 449 degrees, absorbing properties of zinc which makes the steel stronger and durable. The effects of the surrounding climate and dust, bacteria are mitigated by hot-dip galvanizing.

Galvanizer provides high-quality hot-dip galvanizing services. We are an experienced team of professionals that carefully conducted the process of galvanizing. The process of Galvanizing is complicated and it requires a proper pool of professionals to carry out the task. We are proud of the quality we provide. Galvanizer provides hot dip galvanizing services in Vadodara.

Hot-dip galvanizing stages

As said earlier, the coating of steel happens at a certain temperature with properties of zinc. Before this process, it is essential to check the surface first. The surface has to be made adequate for the zinc to settle in and process.

After the hot-dip galvanizing process, proper finishing is to be given. Generally, we supply our products with the finish of Hot Dip Galvanized, Primer coated, Enameled paint coated OR Epoxy paint coated.

The inspection of the material is to be carried out. The things to be checked are thickness test, adhesion test, visual check, and uniformity of zinc coating test.

Corrosion is deadly for any metal. Rust is formed on the iron because of the immediate surrounding climate and the dust, bacteria. A barrier has to be created in order to protect from corrosion. The process of hot-dip galvanizing gives the much-needed layer on the surface that prevents iron from the climate and bacteria. Tanya Galvanizers offers top quality services because of the experienced professionals who follow the stages and process of hot dipping galvanizing in Vadodara.

For more information on hot dip galvanizing by Galvanizers, click the link:

https://galvanizers.co.in/hot-dip-galvanization.html

Difference between BATCH GALVANIZED VS PREGALVANIZED PRODUCTS

Posted on August 17, 2020 by Galvanizers

There is a general misunderstanding among common people that every zinc coating is called galvanization but this is not true as there might be many processes through which a zing coating can be applied. Hot Dip Galvanizing is a coating which is formed after immersing a steelwork in molten zinc. There are however two different processes of hot-dip galvanizing which are pregalvanizing and batch galvanizing.

Batch galvanizing is a process that is used to coat fully fabricated items and includes chemical cleaning of work before immersing it in the galvanizing bath. The item gets completely coated including internal surfaces if hollow sections. The thick coating also provides the best level of available corrosion protection.

Pregalvanization is a process where you take a specific product and galvanize them through an automated process. Steel tubes can be galvanized through an automated process. The immersion time is less and after removal, steam can be blown on the bore of the tube which gives it a good surface finish. In the case of reselling, the tubes can be cut to different sizes which creates uncoated edges.

Strands of wire can be coated using an automated process. The immersion time is very short and the wiping procedure is used to remove excess zinc and give a smooth finish to the final product. It is better to use a mesh of wires so that thicker galvanized coating can be achieved. The steel sheet is uncoiled and passed through the reduced atmosphere before immersing in galvanizing bath for a brief period.

After withdrawing the sheet from the galvanizing bath a mechanical wiper or air knife is used for removing excessive zinc so that the product has a smooth finish. The sheet after galvanizing is recoiled before the stockholder and then it is uncoiled and cut for sale which produces uncoated edges on the sheet.

Both batch and pregalvanized coating have different characteristics and some of them are being enlisted below.

The coating continuity in batch galvanizing is continuous over whole item whereas in pregalvanizing the cut edges are left uncoated
In batch galvanization, coating formation after galvanization is not recommended as it can damage the product whereas in pregalvanization coating can be normally formed without any damage
Batch galvanization offers a high level of sacrificial protection whereas a pregalvanized product has less sacrificial protection because of the thin coating due to which rust formation can happen from cut edges of the sheet
The coating appearance after batch galvanizing can be bright but variable whereas pregalvanized products the overall finish is bright without any variation
There is high resistance to abrasion in batch galvanizing due to thick and hard layer of iron and zinc alloy whereas in pregalvanization the alloy layer is very thin which can cause abrasion easily
The coating thickness in batch galvanizing is very thick as compared to pregalvanized coating
The consideration of design for galvanization is required in both batch and pregalvanized products

At Tanya Galvanizers, we offer the best hot-dip galvanizing in Vadodara. We offer both batch and pregalvanization and you can choose the one which suits your requirements and falls in your budget.

Importance Of Inspection Of Hot Dip Galvanized Products

Posted on April 28, 2020 by Galvanizers

In today’s time protection is a must. The surroundings are getting challenging with each passing day. Although, the realization of the protective shield on things that are always exposed to the outer world is from our ancient past. Hence, way back in 17th-century scientist and researchers started their work towards protecting even metals from weathers. One such protection shield found was the process of Galvanizing. One of the best processes on galvanizing is hot-dip method. The hot-dip galvanization is a very popular and successful method.

The purpose of galvanizing was to create a protective shield through zinc coating on steel. The exposure of steel can be up to 200-degree temperature and will still be strong due to galvanizing. Metals have a tendency to get rusted with extensive exposure to weather and hence creating a protective shield is one such critical requirements. As mentioned before hot-dip galvanizing is the preferred method. In this method, coating happens at a temperature of around 449 degrees. At this level of temperature when steel goes through that heat, it also absorbs few properties of zinc, making it stronger.

The process is quite assuring as it sounds and further reassuring on effective inspection. Before the coating, the steel has to be well prepared which decides the future strength of the coating. It is like when you have to polish your shoes you need to first clean them and then polish. In the same way, cleaning of steel is primary for a longer future and ensuring the efforts are worth it. Although, the coating life always depends on the amount of exposure of the metal. One can ascertain these details based on the standards that are available.

While doing inspection there are few things to consider is the uniformity of the coating. When the coating is not done in required temperature many times it has cracks. Also when steel is not cleaned properly it will result in bumps through the metal, which leads to a breakthrough for breaking the shield. Let us list down checkpoints while doing inspection of hot-dip galvanizing.

The smoothness of the surface
Edges and cuts are well ventilated
Overlapping surfaces are well taken care of
The thickness of the coating be as defined or required
Continuity of the coating
Color and uniformity of the coating

The above are the basics of inspecting hot-dip galvanized products. The inspection list can be more extensive with the nature, design and type of the structure that is galvanized. Many time even the purpose of the product plays a significant role in deciding the type of galvanizing especially in products like jewelry and food graded stuff. You can always reach us to know more about the inspection details and the galvanizing process information.