Under the conditions of nickel plating, zinc plating, copper plating and other various electroplating conditions, the steel electroplating bath is made of steel with hard polyethylene gas lining and is supported by the column in the electrolyte. However, at higher temperatures, the hard polyethylene gas lining is cracked due to thermal expansion (the coefficient of thermal expansion of the hard polyethylene gas is 6 times greater than that of steel), and the integrity of the lining is damaged (especially when welding Zone), the result is that the bath material is corroded and corroded, thereby contaminating the electrolyte and even the amount of corrosion products in the electrolyte (a mixture of metal) is not significant. This is an example of improving the quality of the coating. The effect of using rubber as a lining is small because the rubber is fast Aging produces cracks. The lining process and the process of applying a thin layer of rubber are difficult because of its poor adhesion to certain metals. The protection and insulation methods of all existing chemical rubber column hangers are used. When using out-gassed vinyl paint or out-gassed vinyl tape, the hanger can only be used in the course of 2 to 3 months. The daily labour of replacing and repairing booms is uneconomical.
The most widely used electroplating technology can be plated into various metal coatings. As we all know, electroplating has a history of more than 100 years. It is an electrochemical process, which is the process of depositing the required metal or alloy layer on the metal and non-metal matrix by an electrolytic method. It is an electrochemical processing technology for decorative protection and obtaining some new properties. In modern times, it has developed from the surface treatment of metals to the possibility of plating metal coatings on non-metallic surfaces (such as plastic surfaces) and processing the manufactured workpieces by electrodeposition. Now electrolytic deposition has developed from depositing metals to depositing metal coatings and metal composite coatings. The meaning of electroplating is also constantly developing and broadening. It is widely used in various production departments such as machinery, instrumentation, electronics, light industry, transportation and defence industry, etc., to improve product quality, decorate and beautify product appearance, and enhance products. The ability to resist corrosion and extend the service life of products play an important role. Electroplating uses various new electrolytes to increase the temperature and increase the current density to ensure the improvement of the production efficiency of the electroplated layer and to strengthen its process. Therefore, strict requirements must be placed on the structural materials of the equipment used in electroplating technology. In addition to improving technical performance, increasing the service life of various devices is of great significance. This means that structural materials and lining materials must be used first.
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