Electro Galvanized Steel Sheet & Coil

Electro Galvanized Steel Sheet & Coil is a type of coated steel product that undergoes an electroplating process to apply a thin layer of zinc onto the surface of the steel substrate. This process is different from the hot-dip galvanizing method used for regular galvanized steel.

The Electro Galvanizing Process:

Cleaning:

The steel sheet is thoroughly cleaned to remove any surface impurities, oils, and residues that may hinder the adhesion of the zinc coating.

Electroplating:

The cleaned steel is immersed in an electrolyte solution containing dissolved zinc salts. An electric current is passed through the bath, causing the zinc ions in the solution to deposit on the steel surface, creating a uniform and adherent zinc coating.

Post-treatment:

After electroplating, the coated steel may undergo further treatments such as passivation or chromating to improve its corrosion resistance and appearance.

Advantages of Electro Galvanized Steel Sheet & Coil:

Corrosion Resistance:

The zinc coating provides excellent corrosion protection to the underlying steel, making it suitable for indoor and non-exposure applications where moderate corrosion resistance is required.

Aesthetics:

Electro galvanized steel has a smooth, shiny, and uniform appearance, making it more aesthetically pleasing than regular galvanized steel.

Formability:

Electro galvanized steel retains good formability and can be fabricated and shaped into various products and components.

Cost-Effective:

Electro galvanized steel is typically more affordable than hot-dip galvanized steel, making it a cost-effective option for certain applications.

Paint Adhesion:

The smooth and clean surface of electro galvanized steel allows for better paint adhesion, making it easier to apply additional coatings if needed.

Applications of Electro Galvanized Steel Sheet & Coil:

Electro galvanized steel finds applications in various industries, including:

Automotive:

It is used in automotive parts such as body panels, fenders, and hoods.

Construction:

For interior components, HVAC ducting, and non-exposed parts in buildings.

Electrical Appliances:

For components in refrigerators, washing machines, and ovens.

Furniture: In the manufacturing of metal furniture.

It's important to note that while electro galvanized steel provides good corrosion resistance for indoor and non-exposure applications, it may not be as suitable for harsh outdoor environments compared to hot-dip galvanized steel or other specialized coatings. The choice of the appropriate type of coated steel depends on the specific requirements and the intended application.

In China, the standards for Electro Galvanized Steel Sheet & Coil are set and regulated by the Chinese National Standards (GB/T) issued by the Standardization Administration of China (SAC). The relevant GB/T standard for Electro Galvanized Steel is:

GB/T 17675: Electrolytic zinc-coated steel sheets and coils.

GB/T 17675 specifies the requirements for electrolytic zinc-coated steel sheets and coils, which includes Electro Galvanized Steel. The standard covers the thickness, weight of the zinc coating, and other mechanical and surface properties of the electro galvanized steel.

This GB/T standard ensures that Electro Galvanized Steel Sheet & Coil products produced and used in China meet the necessary quality and safety requirements for their intended applications.

In the United States, the standards for Electro Galvanized Steel Sheet & Coil are set and maintained by the American Society for Testing and Materials (ASTM). The most commonly referenced ASTM standard for Electro Galvanized Steel is:

ASTM A879/A879M: Standard Specification for Steel Sheet, Zinc Coated by the Electrolytic Process for Applications Requiring Designation of the Coating Mass on Each Surface.

ASTM A879/A879M covers the requirements for steel sheet products coated with zinc by the electrolytic process. The standard specifies the thickness of the zinc coating, the surface finish, and other properties of the electro galvanized steel.

This standard is used to ensure the quality and performance of electro galvanized steel products and provides valuable information for manufacturers, suppliers, and end-users in the US market.

In the United Kingdom, the standards for Electro Galvanized Steel Sheet & Coil are generally aligned with the European standards set by the European Committee for Standardization (CEN). The most relevant European standard for Electro Galvanized Steel is:

EN 10152: Electrolytically zinc coated cold rolled steel flat products for cold forming - Technical delivery conditions.

EN 10152 specifies the requirements for electrolytically zinc-coated cold-rolled steel flat products for cold forming. This standard covers the thickness, tolerances, and mechanical properties of the electro galvanized steel, as well as the characteristics of the zinc coating.

EN 10152 is used as the basis for product certification and quality assurance in the European market and ensures that electro galvanized steel products meet the necessary requirements for their intended applications.

In addition to EN 10152, other European standards may also be relevant, depending on specific applications or industries. These standards are often harmonized across the European Union to facilitate trade and ensure consistent product quality.

In Japan, the standards for Electro Galvanized Steel Sheet & Coil are set and regulated by the Japanese Industrial Standards (JIS). The relevant JIS standard for Electro Galvanized Steel is:

JIS G 3313: Electrolytic Zinc-coated Steel Sheets and Coils.

JIS G 3313 specifies the requirements for electrolytic zinc-coated steel sheets and coils, which includes Electro Galvanized Steel. The standard covers the thickness, weight of the zinc coating, and other mechanical and surface properties of the electro galvanized steel.

This JIS standard ensures that Electro Galvanized Steel Sheet & Coil products produced and used in Japan meet the necessary quality and safety requirements for their intended applications.

Thickness tolerances are shown in the example below.

Hot rolled raw plate unit: mm