Hot Dip Galvanization with Substation Structures

Posted on September 23, 2022 by Galvanizers

The pace of development is rapidly increasing in modern times. With this increasing pace, we also need to ensure that the structures that we develop today are durable and sustainable. Fast energy transmission has been instrumental in this growth journey.

Substation Structures have played a vital role among all mediums created for transferring electricity. This blog will provide you with a brief overview of substations and how galvanized substations are the future.

What is a substation?

Substations are used for power generation in a power station. Their transformers assist in the smooth distribution of electricity and reverse the voltage from high to low. Electricity flows through different power plants and substations at different voltages. The voltage changes based on the demand of the consumers and pre-determined targets. Therefore, substations form the backbone in transferring electricity, so it is important to maintain them through hot dip galvanization.

Hot dip galvanization

Substation structures remain exposed to climate, heat, dust, and pollution. Therefore, it is essential that they are maintained appropriately. To make them durable and sustained for a longer period of time, it is necessary that they are galvanized.

Hot dip galvanizing makes these substation structures weatherproof and strong, which helps them resist against various external factors that cause harm to them. One of the most important factors in iron maintenance is the prevention of corrosion. Hot dip galvanization also ensures that these structures are corrosion-resistant.

Hot Dip Galvanization at Tanya Galvanizers

Hot dip galvanization is not an easy process. It requires tremendous professional expertise and experience to galvanize substation structures to make them appropriate for energy transmission.

We at Tanya Galvanizers possess more than six decades of experience in the galvanizing industry. Our expertise lies in creating hot dip galvanizing structures suitable to the requirements of a substation. We make the finest quality products to ensure the highest satisfaction of our clients.

We use various metals and alloys like angels, channels, plates, flats, rounds, zinc, primers, and paints to manufacture a galvanizer. At Tanya Galvanizers, we also abide by the highest testing standards through our scientifically developed and intensive inspection and testing processes.

Prologue

Don’t let the effects of weather and pollution affect your substation structures. Protect all your substation structures by getting in touch with us at Tanya Galvanizers.

Get in touch with our experts today, and they will provide you with end-to-end galvanizing solutions for all your substations structures.

Differences Between Hot-Dipped Galvanization & Pre-Galvanizing

Posted on August 22, 2022 by Galvanizers

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

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.

Difference Between Electro Galvanized Vs. Hot Dip Galvanization Steel

Posted on October 8, 2021 by Galvanizers

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

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.

Tips on Powder Coating on Hot Dip Galvanized Steel

Posted on October 13, 2020 by Galvanizers

Powder coating on hot dip, as can be understood from the name, is a procedure to apply a coating of a special powder on steel that is hot dip galvanized. This particular coating of powder applied on the hot dip galvanizing process provides a significant amount of flexibility as well as a long life. It is precisely the reason as to why powder coating on hot dip galvanized steek has become so popular in recent times. Now, there are three of the major problems that are usually associated with the powder coating on hot dip galvanizing.

Pin holing of the coating – It is caused by the formation of small air bubbles in the coating at the time of curing or stoving cycle. These bubbles give rise to small craters, and are unsightly. At the same time, it reduces the life and durability of the product.
Poor adhesion – In the final step of hot dip galvanizing process, water quenching is involved usually in a weak dichromate solution. If it is not done appropriately, the adhesion of the powder coating tends to be quite poor, and hence ineffective.
Incomplete curing – The powder coatings are thermosetting resins that cross link to their ultimate organic form when they are maintained at a temperature of 180 degrees Celsius for approximately ten minutes. The curing overs are designed to do the task efficiently. But if the curing is incomplete, the coating would not be perfect.

Which is a better option Hot Dip Galvanizing or Zinc Rich Primers for surface protection

Posted on August 14, 2019 by Galvanizers

There are a number of methods by which steel is protected from corrosion. One of the most effective methods of effectively protecting steel from corrosion is galvanic protection. This protection simply works by covering the surface of the steel with a metal which will preferentially corrode and protect the steel at the time when it comes with contact with any electrolyte such as water.

All of the metals and their alloys have a characteristic called the electrochemical potential. Now, when the metals that have a high electrochemical potential comes in contact with a metal having low electrochemical potential tend to corrode. This is the reason as to why galvanic coatings are applied to steel since these galvanic coatings have a higher electrochemical potential as compared to steel and as a result the base metal is saved from corrosion whereas the coating is corroded.

Methods of Galvanic Protection

There are a number of ways by which galvanic protection is offered to steel for preventing it from corrosion. The most common methods used in this regard are as follows.

Hot Dip Galvanisation –

Galvanising refers to the method of application of a continuous layer of zinc to the surface of steel. In the method of hot dip galvanisation, the steel is dipped into a bath of molten zinc which allows zinc to adhere to the surface of steel.
This process involves a lot preparation of the surface of the steel and a number of other steps for the process to be effectively completed.

Zinc Rich Primers –

Zinc rich primer is basically a liquid applied coating on the steel that has a microscopic spheres of solid zinc metal that are held together with a resin.
There are a number of options for the types of resins to be used. The most commonly used resin for the zinc rich primer is epoxy resin. The coating so formed over the steel help in the prevention of corrosion.
Now, it can be clearly understood that both of these methods offer galvanic protection of the base metal steel from being affected by corrosion so as to keep them functional for a longer duration of time.

A Comparison Between the Two Methods

A comparison between the two methods that is hot dip galvanisation and zinc rich primers would prove which of the process is a better one.

The service life of hot dip galvanisation is more as compared to the inorganic zinc rich primer which means when subjected to the same conditions, hot dip galvanisation offers a longer protection as compared to the inorganic zinc rich primer.
Thus, it is clear that hot dip galvanisation offers more galvanic protection as compared to the zinc rich primers in the same environment.
Both hot dip galvanising as well as zinc rich primers can be used with a top coating but many times there is a top coating used for additional protection for the preservation of the galvanic layer and for aesthetics along with the protection of the zinc layer at the time when the service conditions are acidic or alkaline in nature.
Now, zinc being amphoteric in nature does well in the pH neutral environments but quickly deteriorates in case of extremely low or high pH levels.
This is exactly where surface preparation comes into play. Here, hot dip galvanisation has a better prepared surface without any gaps.
But in case of top coating of the zinc rich primers, it needs to be carefully done to release the air in the gaps for properly
sealing the surface which is not needed in hot dip galvanisation. Thus, hot dip galvanisation is a better option as compared to the zinc rich primer.

Since, hot dip galvanisation offers a better solution, it is readily used in the crash barriers, cable trays, earthing material and a number of others. But at any point of time, you are looking for hot dip galvanizing services in Gujarat, make sure you choose a trusted and a reputed one for the best solutions. Tanya Galvanisers would undoubtedly be a very good choice in this regard. With its several years of experience in the field of hot dip galvanisation, you can be assured of getting best of the services.

Galvanizers

Supplier & Consultant of Hot Dip Galvanizing Plants in India.

Category Archives: Hot Dip Galvanized Steel