What is Electro Galvanized Steel？

 

What is Electro Galvanized Steel？

What is galvanizing？

Galvanizing refers to a rust-prevention method of attaching metallic zinc to the surface of iron or steel. Zinc is a highly corrosion-resistant metal that insulates iron from contact with oxygen and water, thus preventing the chemical reactions needed for iron to rust. Since zinc is more metallic active than iron, it can prevent iron from rusting in a sacrificial electrochemical way, even if the plating layer is damaged.

Eletro galvanized

Classification of galvanizing

The main methods of galvanizing are hot-dip galvanizing (HDG), electro galvanized (EG) and cold galvanizing. According to archaeological finds, iron was galvanized as early as the 1680s.

Hot dip galvanizing (HDG)

Hot dip galvanizing is to immerse steel materials in molten zinc liquid to form a zinc coating on the surface of the steel. This method can provide a thick and uniform zinc layer and is suitable for the anti-corrosion treatment of most steel products.

HDG

Cold Galvanizing & Electro Galvanized (EG)

Electro Galvanized is also called Cold Galvanized in China. In the process of electro-galvanizing, a chemical substitution reaction is used. The iron or steel to be galvanized is the cathode, the zinc to be plated is the anode, and the zinc salt solution serves as the electrolyte. The metal elements on the metal surface are replaced with zinc through chemical reactions. To form a coating, the thickness of the zinc layer is generally from 7-40 microns. Compared with hot-dip galvanizing, the advantage of electro-galvanizing is that the zinc layer is more uniform and relatively thin.

Electro Galvanized

Electro galvanized production process

Electro galvanized is a process that deposits a layer of zinc on the surface of steel through an electrochemical reaction. The following is the detailed production process of electro-galvanizing, divided into several main steps.


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