knowledges

What Is The Use Of Nickel?

2024-01-05 18:00:06

   Electroplating field

  Nickel plating refers to coating steel and other metal substrates with a durable and corrosion-resistant coating. Its corrosion resistance is 20%-25% higher than that of galvanized coating. Nickel-plated products are beautiful, clean and rusty. The amount of its is second only to zinc plating, and its consumption accounts for about 10% of total production. this kind of plating is divided into electroplating and electroless plating. The characteristics of electroplating and electroless plating are analyzed as follows:

   Electroplating nickel

  Nickel electroplating layer has high stability in air, very fine crystallization, and excellent polishing performance. Higher hardness of the coating can improve the wear resistance of the surface of products. It is widely used in optical instrument plating, protective decorative coating, casting crystallizer electronic components and so on.

 

   Electroless nickel plating

  Electroless nickel plating has good uniformity in thickness, no hydrogen permeation, no hydrogen embrittlement, and no hydrogen removal is required after electroless plating. Many electroless nickel plating products have better corrosion resistance and high temperature oxidation resistance than electroplating. They can be deposited on the surface of various materials, and do not need the DC motor or control equipment needed for general electroplating. Low heat treatment temperature can obtain different corrosion resistance and wear resistance as long as the heat treatment temperature is below 400 and after different holding time. Therefore, they are especially suitable. Functional coatings for parts with complex shape, wear resistance and corrosion resistance are required on the surface.

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   Types of nickel plating bath

   The main types of nickel plating bath are sulfate type, chloride type, aminosulfonate type, citrate type, fluoroborate type, etc. Among them, the sulfate type (low chloride) plating bath called Watts (Watts) ,which is most widely used in industry. Aminosulfonate type and fluoroborate type are suitable for thick plating or electroforming. Citrate type is suitable for direct plating on zinc die castings. The cost of these plating solutions is relatively high. Other nickel plating types include common plating (dark plating), bright , sulfamate plating, high sulfur , seal, Satin , high stress , multi-layer plating, citrate plating, etc.

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