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Galvanized steel: Ideal material for perfect construction

Galvanized steel: Ideal material for perfect construction

BlogDate: 26-01-2024 by: Ngoc Cam

Galvanized steel, thanks to its resistance to rust, corrosion and outstanding durability, has become an ideal material for many industrial fields.

Have you fully understood the characteristics, pros and cons of galvanized steel and how the galvanizing process takes place? MRS Steel will get deeper into this material.

Galvanized steel products are widely used in various industries due to their durability and corrosion resistance
Galvanized steel products are widely used in various industries due to their durability and corrosion resistance

What is galvanized steel

Galvanized steel is a material that is coated with an outer layer of zinc to protect the product from the effects of the surrounding environment such as temperature, humidity, air,... Thereby, limiting the possibility of rust , anti-oxidation and corrosion to increase strength and life span of coils.

Methods of galvanizing steel

Currently, there are 3 most commonly used galvanizing methods: cold galvanizing, hot -dipping galvanizing and electro galvanizing.

Cold galvanizing method

Cold galvanizing is a method of coating a layer of liquid zinc on the surface of the product at room temperature and then putting it through a cold galvanizing process. Here, the mill uses compressed air to blow a liquid solution to form a beam of zinc particles that shoots onto the metal surface. In the solution, there are additives to help the coating adhere firmly to the metal surface and harden in a short time. Cold galvanizing technology helps to improve the corrosion resistance of metal, so it is the best solution for galvanizing metal materials on site.

The galvanized steel melting point typically ranges from 1420°C to 1460°C, depending on the specific composition of the alloy
The galvanized steel melting point typically ranges from 1420°C to 1460°C, depending on the specific composition of the alloy

Hot-dip galvanizing method

Hot-dip galvanizing is the most popular coating technology today, capable of effectively protecting coils from the effects of the environment. This process starts from dipping the product into a molten solution to form a strong, non-flaking base and a smooth, highly aesthetic product surface.

Electrolytic galvanizing method

Electrolytic galvanizing is a method of electrocoating that forms a thin layer of metal on the surface of a coil for the purpose of preventing metal corrosion, increasing electrical conductivity, size and hardness. In fact, the electrolytic galvanizing method is used for steel products such as water pipes, railways, outdoor equipment, bearing equipment, machine parts,...

Learn about standard galvanizing process

There are 3 methods of galvanizing steel, but hot-dip galvanizing is still the most commonly used method in Vietnamese factories with the following standard implementation process:

  • Step 1: Metal surface treatment

Steel made from iron ore or recycled steel also contains many impurities, dirt and oil that reduce the ability to adhere to the coating layer. Therefore, the material needs to be soaked in the degreasing solution for 10 - 15 minutes and transferred to a solution of hydrogen chloride concentration of 8 - 15% to remove rust.

The density of galvanized steel varies depending on its composition and coating thickness
The density of galvanized steel varies depending on its composition and coating thickness

  • Step 2: Embed Soldering flux

After the steel is cleaned, it is dipped into the flux for about 3 - 20 seconds at normal temperature to completely remove the oxide and iron ions on the surface of the product. This is also the step that creates a coating that protects the steel from oxidation.

  • Step 3: Hot dipped galvanized

Steel will be completely immersed in the galvanizing bath at the melting temperature (454 - 465 degrees Celsius) to create a layer of zinc coating on the surface. After completing the hot dipping process, performing slag scraping on the surface combined with vibration to remove excess zinc, the product will be coated with a layer of chromate to protect the surface comprehensively.

  • Step 4: Cool down and check quality

In order for the surface of the galvanized steel to be bright and beautiful, the product is cooled by an overflow bath. Experts observe and calculate the thickness of the coating by using specialized gauges to ensure that the finished product meets the specifications and requirements of the customer.

Top reasons why you must galvanized steel

Low cost

The production cost of galvanized steel is much lower than other surface protection coating methods, so it is the first choice for large-scale construction projects.

Durable

The zinc coating protects the coil from rust, environmental corrosion and chemical reactions of the inner steel components. According to research, GI has high durability, using life up to 50 years in ideal conditions and from 20-25 years in harsh conditions such as industrial zones, coastal areas, etc.

Aesthetics

Compared with conventional steel products, galvanized steel has a shiny, smooth surface and is easily coated with high-grade color paint to increase aesthetics.

Reduce maintenance costs

Galvanized steel products have high durability, long service life, so it does not cost a lot of maintenance and regular maintenance during use.

The
The "galvanized steel meaning" encompasses the process of coating steel with a protective zinc layer to enhance its corrosion resistance

Application of galvanized steel

Galvanized steel possesses high durability, good bearing capacity and is a familiar material in common applications such as deck floors, ventilation pipes, oil pipes, purlins, vehicle parts, household appliances, furniture,... In particular, galvanized steel is an ideal material for many important industries, specifically:

Wind and solar industry

The solar energy projects need to operate continuously, so maintenance must be minimized to avoid disruptions and decrease in productivity. Additionally, due to exposure to harsh environmental conditions such as sun, wind, rain,..., the project is susceptible to deterioration and damage.

Therefore, galvanized steel is widely popular in the wind and solar energy industries because of its durability, corrosion resistance and resistance to environmental factors, enduring for decades.

Automobile industry

Galvanized steel is an ideal material for manufacturing automobile frames and parts. Currently, about 80% of car bodies are made from galvanized steel with durability, rust resistance and many other advantages.

Construction industry

Durability is the top criterion in choosing construction materials. resident or commercial projects demand materials capable of bearing heavy loads, with high longevity, and minimal need for frequent maintenance. Therefore, large structural parts in buildings are often made of galvanized steel to ensure safety and sustainability.

Telecommunications industry

Phone lines are often in high, difficult-to-access positions, leading to irregular maintenance. Therefore, when choosing materials in the telecommunications industry, attention must be paid to sustainability and minimal maintenance requirements.

The
The "galvanized steel meaning" encompasses the process of coating steel with a protective zinc layer to enhance its corrosion resistance

MRS Steel: providing the benefit of importing Vietnamese galvanized steel

With investment in infrastructure, modern equipment and strictly selected raw materials, Vietnam galvanized steel mills provide product lines with thicknesses from 1.5 to 3.0mm, coating degree Z275 - Z350, strength up to G450.

FDI projects especially favor these types of galvanized steel because of their durability. high quality and good resistance to environmental conditions, so the life of the works can be up to 50 years.

In addition, galvanized steel also meets many international standards such as JIS G3302 of Japan, BS EN 10346 of Europe, AS 1397, ASTM A792 of the United States, conquering many difficult export markets such as the EU. , the United States, Korea and Southeast Asia,... This is the result of the factory synchronizing production lines imported from the world's most advanced metallurgical and equipment corporations such as Danieli, Tenova and the G7.

MRS Steel is one of the exporters of quality galvanized steel, committed to international standards and specifications from customers. For any specific advice and quotation, please contact MRS Steel via Whatsapp: +84 76 911 2358 for 24/7 support.