How is old stainless steel made?

Old stainless steel is a relatively popular decorative material at present, which is mainly obtained by old and retro processing of stainless steel through special processing technology. The old stainless steel can bring a retro, heavy and simple atmosphere, which is very high-grade and rich in culture. Therefore, it is widely used in copper doors, copper decoration, copper carvings, vintage furniture copper accessories, four treasures of the study, antiques, copper Handicrafts, incense burners, copper handles, reliefs, showcases, curtain walls, sculptures and many other fields, and have been well received and loved by customers. There are many advantages to using stainless steel for aging: the production and processing cost of stainless steel is much lower than that of copper, so the processed products have greater price competitiveness, and the same effect can be achieved with less cost; the hardness of copper is higher than that of copper. It is difficult to use in a large area, and the hardness of stainless steel is much higher; the chemical properties of copper are relatively active compared with stainless steel, and the corrosion resistance, wear resistance, waterproof and rust resistance of stainless steel are much better than copper, and the service life is longer.

There are generally two processes for stainless steel copper plating: one is vacuum electroplating, then electroplating is a process of using electrolysis to attach a layer of metal film to the surface of metal or other material parts. It can prevent corrosion, improve wear resistance, electrical conductivity, reflectivity and enhance aesthetics.

The second is water plating, which is currently the most widely used, stainless steel water plating: it does not rely on external power in the aqueous solution, and relies on the reducing agent in the plating solution to carry out chemical reduction reaction, so that metal ions are continuously reduced on the autocatalytic surface. A process method for forming a metal coating. Its processing flow is first to remove wax and oil from the workpiece to be plated. After activation, alkali copper is first electroplated. The electroplating time is about 10 minutes. After the tank is washed, neutralized and activated, copper bright plating is performed. The electroplating time is more than 20 minutes. When the coating is thick enough, the tank is washed, activated, and directly electroplated with nickel and black. The electroplating time is suitable for the surface of the workpiece to be evenly black, then washed with water, dried, and ready for processing. The workpiece with bright copper plating can also be washed with water for blackening treatment. Generally, 5% potassium sulfide aqueous solution is used for immersion, and the workpiece is turned repeatedly. When the surface of the workpiece is black or brown, the workpiece is removed, washed with water, and dried. processing. Then, the workpieces plated with black nickel and gun color or blackened are polished with nylon wheels, and the degree of polishing depends on the requirements of the patina. When the workpiece achieves the desired effect, spray electroplating varnish, that is, we say The fingerprint-free treatment and then drying packaging is fine.

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