Category Archives: Electro Galvanized

Differences Between Hot-Dipped Galvanization & Pre-Galvanizing

Differences Between Hot-Dipped Galvanization & Pre-Galvanizing

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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

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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.

 

Difference Between Electro Galvanized Vs. Hot Dip Galvanization Steel

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The process of galvanization is extremely crucial when it comes to businesses related metal industry. The main reason being galvanization protects the metal from all natural elements increasing the longevity of the metal. There are usually two types of galvanization that are done to metal they are Electro Galvanization and Hot Dip Galvanization.

In order to understand which galvanization is better for your business, let’s take a look at how each process of galvanization works and what are differences between them!

What is 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.

What is Electro Galvanization?

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.

Let’s take a look at how each of the process is different from each other.

Comparison Chart between Hot Dip Galvanization and Electro Galvanization

Comparison Chart between Hot Dip Galvanization and Electro Galvanization-Tanya Galvanizers India

In the lights of the differences it is clearly evident how hot dip galvanization is different from electro galvanization process. It is completely based on your organizational requirement you should select your ideal choice of galvanization for your business. To know more about galvanization or for expert advices 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.