Electro galvanizing

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.

1. Pre-treatment

Cleaning

First, the steel needs to be thoroughly cleaned to remove oil, dust, and other impurities from the surface. This step is usually cleaned with an alkaline cleaner and then rinsed with water.

Pickling

the steel is pickled to remove oxides and rust from the surface. Commonly used pickling solutions are hydrochloric acid or sulfuric acid. After pickling, the surface of the steel becomes clean, which is conducive to the subsequent galvanizing process.

Infiltration After pickling

the steel is usually wetted to keep its surface moist and prevent oxidation in the air. Specific sizing can be used for this step.

2. Electro galvanized

Electrolyte preparation

The main components of the electrolyte used in the zinc electroplating process are zinc sulfate (ZnSO) and potassium chloride (KCl). The zinc ions in the electrolyte will be deposited on the steel surface during the electrochemical reaction.

Electro Galvanized

plating Steel serves as the cathode (negative electrode) and is immersed in the electrolyte. Zinc serves as the anode (positive electrode) and is also immersed in the electrolyte. When electric current passes through the electrolyte, zinc ions are reduced on the cathode and deposited on the steel surface, forming a uniform zinc coating.

3. Ater-treatment

Passivation

After electro galvanizied, the steel is usually passivated to improve the corrosion resistance of the zinc layer. Passivation usually uses chromate or other chemical agents to form a protective film.

Washing and drying

After passivation, the steel needs to be washed again to remove residues from the surface. After washing, the steel needs to be dried to ensure that no moisture remains on the surface.