Zinc Plating Introduce
  • 2021-05-27 17:31:36

Electro-galvanizing, also known as cold galvanizing in the industry, is the process of using electrolysis to form a uniform, dense, and well-bonded metal or alloy deposition layer on the surface of the part.

Compared with other metals, zinc is a relatively cheap and easily plated metal. It is a low-value anti-corrosion electroplating layer and is widely used to protect steel parts, especially to prevent atmospheric corrosion, and for decoration. Plating technology includes slot plating (or rack plating), barrel plating (suitable for small parts), blue plating, automatic plating and continuous plating (suitable for wire and strip).

The purpose of electro-galvanizing is to prevent steel objects from being corroded, improve the corrosion resistance and service life of steel, and also increase the decorative appearance of the product. Steel will be weathered, corroded by water or soil over time. The steel that is corroded every year in China accounts for almost one-tenth of the total amount of steel. Therefore, in order to protect the service life of steel or its parts, electro-galvanizing is generally used to process steel.

Because zinc is not easy to change in dry air, and it can produce a basic zinc carbonate film in a humid environment, this film can protect internal parts from corrosion and damage, even if the zinc layer is damaged by some factor In this case, the combination of zinc and steel over a period of time will form a micro-battery, and the steel matrix will become the cathode and be protected. In summary, electro-galvanizing has the following characteristics:

1. Good corrosion resistance, meticulous and uniform combination, and it is not easy for corrosive gases or liquids to enter the interior.

2. Because the zinc layer is relatively pure, it is not easy to be corroded in an acid or alkali environment. Effectively protect the steel body for a long time.

3. After chromic acid passivation, it can be used in various colors, which can be selected according to the customer's preference. The galvanizing is beautiful and decorative.

4. The zinc coating has good ductility and will not fall easily during various bending, handling and impact.

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