Stainless steel surface polishing is a surface treatment method to clean the oxide scale and gloss of stainless steel products, which is used to remove substances harmful to human body on the surface. There are three common polishing methods for stainless steel surface: mechanical polishing, chemical polishing and electrochemical polishing.

stainless steel is widely used because of its high corrosion resistance and decoration. Stainless steel utensils should be corrosion-resistant, bright in appearance, clean and hygienic, and the surface of the utensils should not be attached with substances that are toxic to human body. Therefore, the surface treatment for the production of such appliances is required to completely remove the harmful substances on the surface.

after hot working, mechanical working or standing for a certain period of time, a layer of black or gray scale will be formed on the surface of stainless steel, and its main components are Cr23, Ni and very difficult Fe and Cr23, which will affect the appearance quality and the service performance of products, so appropriate measures should be taken to remove them.

as a mature surface treatment method, stainless steel polishing has been widely used, and polishing can further improve the corrosion resistance and bright effect of stainless steel.

methods of polishing stainless steel surface:

1. mechanical polishing.

mechanical polishing is a polishing method to get a smooth surface by cutting and plastic deformation of the surface of the material. Generally, oilstone strips, wool wheels and sandpaper are used. With this technology, the surface roughness of Ra.8μm can be achieved, which is the highest among various polishing methods.

2. chemical polishing.

chemical polishing is to make the micro-protruding part of the surface of the material dissolve preferentially over the concave part in the chemical medium, so as to obtain a smooth surface. The main advantage of this method is that it does not need complex equipment, can polish workpieces with complex shapes, can polish many workpieces at the same time, and has high efficiency. The surface roughness obtained by chemical polishing is generally 1 μ m.

3. electrochemical polishing.

the basic principle of electrolytic polishing is the same as that of chemical polishing, that is, by selectively dissolving tiny protrusions on the surface of materials, the surface is smooth. Compared with chemical polishing, it can eliminate the influence of cathode reaction and has better effect.