Differences Between Hot-Dipped Galvanization & Pre-Galvanizing

Differences Between Hot-Dipped Galvanization & Pre-Galvanizing

Galvanizing is one of the widely used methods for protecting metals from corrosion. It involves applying a thin zinc coating to a thicker base metal like iron metal. The process helps to shield the metal from the surrounding environment. When a metal undergoes galvanization, it does not experience any corrosion. However, without the zinc coating, the metal remains exposed to the elements and potentially oxidizes and corrodes faster. There are several ways of galvanizing metals, including hot-dipped galvanization and pre-galvanizing.

Hot-Dipped Galvanization vs. Pre-Galvanizing: What Are They?

As the name suggests, in hot-dipped galvanization, experts dip the steel in hot, molten zinc. When the zinc coats the steel, a metallurgical reaction occurs between the iron component of the steel and the hot zinc. The reaction known as the diffusion process occurs when the coating collects perpendicular to every surface, creating a uniform thickness.

When the expert removes the steel from the zinc bath, it reacts with the oxygen in the air to form zinc oxide. It then reacts with carbon dioxide and forms the final protective coating of zinc carbonate. With multi-layered zinc coating and iron-zinc alloy, the steel becomes corrosion-resistant.

Pre-galvanizing, also called mill galvanizing, is another galvanizing process close to ho-dipped galvanizing. However, this process occurs at the very first stage of production. The process takes place at steel mills that have a specific shape. Pre-galvanizing involves a few steps of hot-dip galvanizing, like cleaning the surface, hot zinc bathing, and recoiling.

Key Differences Between Hot-Dipped Galvanizing and Pre-Galvanizing

Differences Between Hot-Dipped Galvanization & Pre-Galvanizing

Application Comparison

Hot-dipped galvanization is an economical choice that you can execute on simple and complex shapes. Experts use it on objects fabricated beforehand and yet not galvanized. The hot-dipped galvanization plays the last step.

On the other hand, a metal requires undergoing pre-galvanizing at the first production stage. It mainly occurs at the mill and later undergoes cutting into size and fabrication.

Coating Comparison

Since the galvanizing process involves the application of a protective coating for the steel and metals, it is essential to consider the coating finish of the two methods of manufacturing galvanized steel.

Coating Thickness

Although both methods result in uniform thickness, the hot-dipped galvanization produces a thicker layer of protection than the other method.

Coating Continually

Hot-dipped galvanizing requires dipping the entire steel and other metals into the molten vat of zinc. The galvanized steel comes with a continuous coating over the surface. On the other hand, pre-galvanizing requires performing before cutting the sheets into perfect sizes and pieces; therefore, the cut edges do not undergo any coating.

Coating Formability

Since the process of pre-galvanizing undergoes at the mills, any coating applied after cutting the metals does not damage the layer. On the other hand, coating formability applied on hot-dipped galvanized steel is not advisable, as it might damage the protective coating of the products.

Coating Appearance

The hot-dipped galvanization forms a bright finish for the galvanized steel, which might or might not be uniform. On the other hand, the pre-galvanizing process produces a uniform bright finish for the coating.

There are numerous differences between hot-dipped and pre-galvanizing processes. Understanding the differences helps in choosing suitable methods and products for different projects.

Electro Galvanised Steel

Electro Galvanized Steel Vs Galvanized Steel

Suggested Topic: Know the Differences Between Electro Galvanised Steel and Galvanised Steel

Galvanization is the process where you apply a protective coating of zinc on the iron or steel to prevent it from rusting. While doing this method, one should take proper care of the same. This process can be hazardous to the person if not done correctly. It will also cause damage or malfunction of the equipment, instrument, and many more.

Before choosing the process, one must indulge in thorough research and understand the difference between electro-galvanized steel and galvanized steel. Knowing the difference can help a person to be safe while selecting the right and most appropriate method and product according to the specific requirement and needs of the business. Otherwise, it can just be a waste of money and time.

Difference between electro-galvanized steel and galvanized steel

Here are some basic differences between galvanized steel and electro-galvanizing.

  • In the case of galvanized steel, one needs to follow up a rigid cleaning process. This process is also known as the 7-bath process. But when it comes to electro-galvanizing, one need not have to follow such stringent cleaning methods.
  • To achieve the galvanized steel coating, the steel is said to get dipped in the molten zinc bath at a temperature variation of 460° c. But for the electro galvanization, the steel gets prepared in a cathode in the electrolytic cell that forms a coating while using the electroplating process.
  • Electro-galvanizing indeed has a very low life ranging from several months to a few years. But in the case of galvanized steel, the average lifespan is between 20 years to 50 years. However, electro galvanization produces an excellent finish. But the galvanized steel offers an unpleasant and dull finish.
  • Above all, the coating thickness of the galvanized steel is about 80 to 100um. Also, the thickness depends entirely upon the dipping duration. The composition and the roughness of the steel affect the same. When it comes to electro galvanization, the coaching thickness is about 10 to 12 um. The current density and the temperature of the electrolyte determine the thickness of the coating in this case.
  • The galvanized steel offers a non-uniform coating. But in the case of electro-galvanized steel, one can expect a uniform coating.

 Cost

When it comes to the cost, galvanized steel, having a normal coat thickness, becomes 40% more expensive than electro-galvanized steel. The electro-galvanized steel has a normal coat thickness, which makes it a lot affordable. The cost happens to increase proportionately with the higher coating thickness.

It becomes extremely necessary for a person to choose a reputed company to select either electro-galvanized steel or galvanized steel to get top-class service.

Why Choose Tanya Galvanizers

Tanya Galvanizers provides the best quality service and products according to your needs and requirements. Whether it is electro-galvanized steel or galvanizing steel, we are the leading name in the market.

Since we have decades of industry experience, we provide the best solution for your requirement. If you are looking for either electro-galvanized steel or galvanized steel, we would be happy to help you.

 

Top-Quality-Galvanizing-Services-For-Earthing-Materials

Top Quality Galvanizing Services For Earthing Materials

Electricity is one of the critical and essential elements of modern life. We cannot imagine our lives without electricity. It has increased the offerings to the people with great power and superior quality. 

The knowledge and power they gain have now made livelihood easier and more convenient. No doubt, electricity has made life convenient and easy, but several aspects need to be taken into consideration that help keep us safe and acceptable. One of the essential aspects present in the electrical layout is regarded to have proper and accurate earthing materials. The material is part of the layout considered in offices, residences, commercial places, and streets.

The earthing material can be considered safe and secure only when the material used is of high and superior quality. Considering this stage there will be a possibility of electrocution and short circuit. Nowadays, a majority of houses are said to have delicate electrical gadgets used on a day-to-day basis. So, for them, it is necessary to have accuracy and stability of proper current supply and high-end earthing electrical materials.

The objective of Earthing Material

The objective of having proper Galvanizing of earthing materials is to avoid any kind of hazards that may occur by shocks or burns. It is known to be a helping resource that helps retain stability and offers protection against all electrical odds. To avoid any kind of faulty electricity flowing through, these earthing materials tend to have an alternative channel. This way, it ensures that the actual current flow is not hampered in any manner and that the gadgets and users are kept safe.

Uses of Earthing Materials:

Let us now proceed further and have a look at the core uses of having these earthing materials.

  • Earthing pipes: These pipes are commonly used as the application that is required for power transmission. It is known to be one of the best quality pipes created from copper and GI. The pipe needs to be installed quickly and come with robust construction to last a lifetime.
  • Earthing wire: One of the core features required for earthing. These wires are created from highly superior quality GI and copper material. These wires are used in different electronic, automobile, and electrical instruments. Not only these, but the cables formed are also from one of the best quality galvanized metals that are shock resistant and with great durability. The wires are sturdy and could last a lifetime as hot-dip galvanized material is used.

 

  • Earthing strips: While working on an electrical project, it is necessary to have earthing strips in it. Thus, there is a need and necessity to have a proper balance between thermal and electrical conductivity. It has a great variety of thicknesses and has a range defined. Range may vary between 3 and 6mm and width of 15 to 100mm. Such strips are created from aluminum, GI, and copper.

 

  • Earthing plates: The residential and commercial places do make use of earthing plates to provide shock resistance. Such plates are developed from galvanized materials to ensure high durability, amazing shock resistance, and safety.

How to select good quality earthing materials?

We at Galvanizers are the leading name in the market for providing the best quality of galvanizing material for the purpose of earthing wires, strips, and plates. With top-quality earthing materials and having expertise in manufacturing the materials that can be used for residential and commercial use, we are the name in the market. Contact us today to book your order with us.

Galvanizers, the company itself is the name in the market to provide highly imperative earthing materials that are the current need and demand for the market. So, whether it is a construction project going on, or redevelopment of old properties, earthing materials are required at the top. 

Why-Crash-Barrier-Needs-Galvanizing-Tanya-Galvanizers

Why Crash Barrier Needs Galvanizing

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 life saving act that crash barriers performs, while being exposed to all types of weather conditions they need galvanization. 

Let’s walk you through what is galvanization and why crash barriers need galvanization!

What is Galvanization?

The galvanization of crash barrier highlights coating the metal barrier 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 metal’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 metal. This in turn helps you protect the metal of crash barriers from natural calamities and external elements. 

Now that we have understood what galvanization of crash barriers is, let’s walk you through why you need it for crash barriers.

Why Galvanize Crash Barriers

Galvanization of crash barriers has multiple advantages other than protecting the metal from damages. These benefits include:

  • Sustainability
  • Durability
  • Proven Quality
  • Cost Effectiveness
  • Reliability
  • Complete Coverage
  • Predictability
  • Triple protection
  • Toughness
  • Longevity
  • Protection from natural elements and more

These benefits clearly signifies, in order to protect you crash barrier, galvanization is a must process that you should opt for. Since, we have now conclude why we should galvanize crash barriers let’s walk you through the different benefits it provides. 

Merits of Galvanizing Crash Barriers

At Galvanizer our added protection against corrosion and rusting through hot dip galvanizing ensures that the crash barriers 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. So if you are looking for a perfect protection for your crash barriers you can get in touch with us. We would be happy to help you.

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 crash barriers. To know more on service and business related inquiry get in touch with us. 

Reliable Hot-Dip Galvanizing Services in Vadodara

Hot-dip galvanizing (HDG) is a variation of the standard galvanizing process that works well for protecting carbon steel. The foundation for any building depends on steel. It is the material that provides a sturdy and long-lasting base for the structure. When using solid steel, one thing that needs to be understood is this material is robust and durable. Thus, it is non destructable. But with time, the rust form on the steel can destroy the structural integrity.

Galvanization is a process that prevents the onset of rust. It is a detailing process that entails steel coating with zinc. It is a material that has high corrosion-resistant and is a sort of inexpensive metal. It is the zinc coating that will undergo oxidation and dissolve before the rust reached the substrate’s surface. The dissolved zinc electrons flow to the portion of the steel that requires protection.

What Is Hot-Dip Galvanizing?

With hot-dip galvanization, the steel substrate is immersed in a vat containing molten zinc. The zinc reacts with the iron in the steel (carbon steel is comprised of approximately 90 percent iron) to form an alloy that provides excellent corrosion resistance.

Benefits of Hot-Dip Galvanization

The Hot-Dip Galvanizing process is tedious work and requires reliable processes. At Galvanizers, we provide reliable galvanizing services in Vadodara. Here we are listing the benefits of selecting us as your service partner for the Hot-Dip Galvanizing process.

  • Durability
  • Toughness
  • Low Maintenance
  • Proper Surface Coating
  • Fast Application
  • Affordability

Process of Hot-Dip Galvanizing

The next what we are discussing is how the entire process of Hot-Dip Galvanizing works. Let us proceed further with this and understand it in detail.

  • Surface preparation
  • Degreasing 
  • Pickling
  • Fluxing 
  • Galvanizing 
  • Inspection 

Interested in co-locating with us? 

Galvanizers is the leading name in Vadodara for the need for hot-dip galvanizing services. With the team of experienced staff and supply chain, we help seal the deal at the best market price. Simply, get in touch with us and rest is what we will do for you.

Reason for Galvanizing Steel Structure

Are invested in a business dealing in steel or an individual looking for solution to protect steel structure? Well in that case you are just browsing the right page at the moment. Today we are going to walk you through galvanization of steel structure and how it will help you protect your steel.  

What is Galvanization of Steel?

The galvanization of steel highlights coating a steel 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 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. This in turn helps you protect your steel from natural calamities and external elements. 

Now that we have understood what is galvanization of steel, lets walk you through why you need it for your steel structure.

Reasons for Galvanizing Steel

Galvanization of steel structure has multiple advantages other than protecting the metal from damages. These benefits include:

  • Sustainability
  • Durability
  • Proven Quality
  • Cost Effectiveness
  • Honesty
  • Reliability
  • Complete Coverage
  • Predictability
  • Triple protection
  • Toughness
  • Longevity 
  • Protection from natural elements and more

These benefits clearly signifies, in order to protect you steel structure, galvanization is a must process that you should opt for. So if you are looking for a perfect protection for your steel structure you can get in touch with us. We would be happy to help you. 

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.

Hot-Dip-Galvanization-experts-for-steel-structures-Tanya-Galvanizer

Hot Dip Galvanization Experts For Steel Structures

The process of galvanization is extremely crucial when it comes to steel structures. The main reason being galvanization protects the steel from all natural elements increasing the longevity of the metal. Over the years through successful testing, application and research it has been discovered that hot dip galvanization is the most successful in the protecting steel for longer period of time, than any other galvanization.

Let’s take a look at what hot dip galvanization is, and how effective and durable it is in protecting steel structures!

What is Hot Dip Galvanization, and how does it work?

The hot-dip galvanizing technique is one of the most widely utilized galvanizing methods. It is carried out by immersing steel in molten zinc, which results in creating a coating of zinc over the steel. During this process the temperatures in the bath of molten zinc are 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. 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 that is being protected through the hot dip galvanizing process.

This approach of hot dip galvanization highlights many benefits for steel structure, let’s take a look at some of the major advantages of Hot Dip Galvanization on steel.

Advantages of Hot Dip Galvanization on Steel

  • Longevity: A hot dip galvanized structure can endure between 30 and 60 years, depending on the amount of time it is exposed to corrosive elements. Besides, this it is a chemical bonding process and hence is un-reactive to regular corrosion process like salt water and rainfall
  • Cost savings: once galvanized, the structure doesn’t need to be painted or maintained.
  • Versatility: once the technique has proven to be capable of safeguarding a wide range of items in terms of size and shape, it can be used to protect a wide range of products.
  • Coating is guaranteed inside and out since the treated structure is totally immersed.
  • Triple protection: increased resistance to knocks, scratches, and abrasion through physical, electrochemical, and self-curing improvements.
  • Satiny appearance: Many customers prefer its trendy and glossy appearance.

These benefits clearly showcases that hot dip galvanization is absolutely ideal to protect steel against elemental challenge that cause corrosion. Further the chemical bonding structure allows it to stand un-reactive clearly indicating the lost lasting durability that hot dip galvanization have over other galvanization processes.

So if you are looking for hot dip galvanization for your steel or other metal structures you can get in touch with us, we would be happy to help you.

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.

Importance-of-Galvanizing-Earthing-Strips-Tanya-Galvanizers

Importance of Galvanizing of Earthing Strips

Safety from electric short circuit or electric pulse from natural calamity like thunderstorm is one of the most basic requirements that every household and businesses across the world tend to lookout for. In order to create this safety usage and application of earthing strips is the most common approach that is seen across all household, business place and industries. This not only creates a safe environment for human beings from electricity in all these places, but also ensures thorough protection for all types of electric gadgets and instruments installed in these places. It is because of this reason taking care of earthing strips is of immense importance to maintain safe environment across all places where electricity requirement is concern.

To ensure creation of a safe electricity hazard free environment and protect the earthing strips we at Galvanizers bring you Galvanizing for earthing strip. Let’s walk you through what is galvanizing and how it is performed on earthing strip and how the same protects the earthing strips.

What is Galvanizing Process?

Galvanizing process refers to an approach that highlights application of 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.   

How Galvanization of Earthing Strips Performed?

There are two different approaches that are used to galvanize earthing strips they are hot dip galvanizing and cold galvanization.

The hot dip galvanization reflects submerging the earthing strips 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 earthing strips 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, which in turn prevents the earthing strips from corrosion.

On the other cold galvanization reflects application of a zinc-rich paint to the surface of the earthing strips to protect it from corrosion.

These approaches are usually used to galvanize earthing strips to prevent it from corrosion, depending on whether the earthing strips are installed or yet to be installed the specific approaches are used for galvanization for yet to be installed earthing strips hot dip galvanization process is used and for installed earthing strips cold galvanization process is usually applied unless the earthing strips are easily detachable from the jointed location.

Why Galvanization of Earthing Strips is Important?

Earthing strips are applied in open atmosphere to ensure that the process of earthing does not impacts the site for which they are installed. It is because of this reason earthing strips are exposed to extreme heat, and cold temperatures, dust and other natural calamities like rain fall and wind which over a period of time corrodes away the strips. This can result in catastrophic accident due to inability of the strips to provide proper earthing to the site from high voltage electric pulses. In order to avoid such accidents from happening and safe guard the site from high voltage electric pulses, galvanizing of earthing strips is of prime importance. It is because galvanization of earthing strips not only protects strips from getting corroded away by natural elements, but also prevents accidents that may happen because of the inability of earthing strips to provide earthing due to corrosion.

Advantages of Galvanizing Earthing Strips

There are many different advantages that galvanization earthing strips can provide, they are as follow:

  • Prevention of the earthing strips from corrosion through exposure to natural elements
  • Prevention of earthing strips from decay from exposure to high energy transmission
  • Safeguard against huge financial losses because of because accidents that may happen because of corroded earthing strips
  • Lower the annual maintenance cost of earthing strips to zero
  • Galvanization of earthing strip is a onetime investment that can create protection for decades

 These advantages clearly reflects how galvanization of earthing strips can not only prevent accidents but also protect the earthing strips from corrosion and stop recurring investment behind the strips.

So if you are an individual looking for galvanizing of your earthing strips at home, office or factory, you can get in touch with us. We would be happy to help you.

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 galvanizing solution for your metal requirements. To know more about our services or business related inquires you can get in touch with us.   

Hot-dip galvanizing a Cost-effective corrosion protection solution

Hot-dip galvanizing a Cost-effective corrosion protection solution

Businesses all around the world are shifting towards the use of steel because of its longevity that comes with galvanized steel and quality that galvanized steel delivery even when it comes in contact with reactive agents. So if you are into business where requirement of steel is a must, then you should look forward to invest in hot dipped galvanizing of the metal for sustainability and larger flexibility for your business. Because hot dip galvanizing not only provides safety and quality to the metal but also is a far cheaper solution against corrosion. 

Let’s take a look at what is hot dip galvanizing and how it is a cost effective solution. 

What is Hot Dip Galvanizing?

Hot-dip galvanizing process highlights coating 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 Galvanizing is a cost effective solution 

There many advantages that make hot dip galvanizing process an ideal cost effective solution against corrosion, they are as follow:

  • Hot dip galvanization increase the durability of the metal
  • Once hot dip galvanization is done it last for years before the metal can get exposed 
  • It provides perfect resolution against all types’ weather, ensuring a long lasting protection for the metal
  • When exposed to reactive agent hot dip galvanization provides the perfect solution to protect the metal
  • With hot dip galvanization it is possible to coat all sizes of metals thoroughly and equally

All these advantages sums up the effectiveness that hot dip galvanization have against corrosion while saving the business huge sum of money with a long time solution. 

So if you are looking for cost effective corrosion protection for your metal business, 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 hot dip galvanizing process. With decades of industry experience we offer nothing but the best. To know more about hot dip galvanization or for business enquiry from us get in touch with us.

 

Understanding-the-difference-between-Hot-dipped-galvanized-and-Cold-Galvanizing-steel-

Understanding the difference between Hot dipped galvanized and Cold Galvanizing steel

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. 

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