Characteristics, properties and uses of electroplating nickel plating on the four guidelines:
The stability of the four-way electroplating nickel layer in the air is very high, because the metal nickel has a strong passivation ability, a thin passivation film can be quickly generated on the surface, which can resist the corrosion of the atmosphere, alkali and some acids;
2. The four-way electroplating nickel has fine crystals and excellent polishing properties. The polished nickel coating results in a mirror-like lustrous exterior while maintaining its luster in the atmosphere for a long time. Therefore, electroplating is often used for decoration;
3. The hardness of the four-way nickel plating layer is relatively high, which can improve the wear resistance of the surface of the product, and the nickel plating layer is commonly used in the printing industry to improve the hardness of the lead surface. Due to the high chemical stability of nickel metal, some chemical equipment also commonly uses a thicker nickel plating to prevent corrosion by the medium.
Nickel plating is also widely used in functional aspects, such as repairing worn and corroded parts, and using brush plating technology for spot plating. The electroforming process is used to manufacture electroformed plates, record molds and other molds for the printing industry. The thick nickel plating layer has good wear resistance and can be used as a wear-resistant coating. In particular, in recent years, composite electroplating has been developed, which can deposit a composite nickel coating sandwiched with wear-resistant particles, which has higher hardness and wear resistance than nickel plating.
If graphite or graphite fluoride is used as the dispersed particles, the obtained nickel-graphite or nickel-fluoride composite coating has good self-lubrication and can be used as a lubricating coating. Black nickel coating is also widely used as a coating or decorative coating for optical instruments.
4. The four-way nickel plating has a wide range of applications, and can be used as a protective decorative coating to protect the matrix material from corrosion or play a bright decorative role on the surface of steel, zinc die castings, aluminum alloy and copper alloy; It is also often used as the intermediate coating of other coatings, on which a thin layer of chromium is plated, or a layer of imitation gold is plated, which has better corrosion resistance and more beautiful appearance. In terms of functional applications, nickel plating on parts in the industry is about 1-3mm thick, which can achieve repair purposes. In particular, it is widely used in the manufacture of continuous casting crystallizers, surface molds for electronic components, die-casting molds for alloys, aerospace engine parts with complex shapes, and miniature electronic components.
5. In the four-way electroplating, due to the excellent properties of electroplating nickel, its processing volume ranks second only to electrogalvanizing, and its consumption accounts for about 10% of the total nickel output.
