Galvanizing process

Galvanizing process
1. Process introduction

Zinc is a silver-white metal, brittle at room temperature, with an atomic weight of 65.38 and a density of 7.17g/cm3. It is an amphoteric metal that can interact with acids and alkalis. The actual zinc coating is passivated. Because the galvanized layer is passivated in a solution containing chromic acid, a chromate film of various colors with higher chemical stability can be obtained on the galvanized surface, and its protective ability can be increased by 5 to 8 times, and the surface Beautiful, increased decorative effect.

2. Process characteristics

1. Available gloss, smooth coating

2. It can be directly plated on carbonized, nitrided steel and cast iron

3. Higher current efficiency

4. The waste liquid is easy to handle, just use high pH to precipitate zinc

5. Good conductivity, save power

6. Low hydrogen embrittlement

7. Glossy coating can be obtained at higher temperature

8. Stable plating bath, low toxicity and low cost

3. Various performance parameters

Film thickness (μm) Hardness Gloss Color difference Adhesion Corrosion resistance Galvanized 7~12 90° bending without cracking 12H (National standard neutral salt spray test)