Polishing treatment of stainless steel surface

Stainless steel surface polishing is a kind of surface treatment method to clean the scale and gloss of stainless steel products, which is used to remove harmful substances 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 and smooth, and the surface of the utensils should not be attached with substances that are toxic to human body. Therefore, the production of this kind of appliance needs surface treatment to completely remove harmful substances on the surface.

Black or gray scale will be formed on the surface of stainless steel after hot working, mechanical working or standing for a period of time. The main components are Cr203, Ni0, and difficult Fe0 and Cr203, which will affect the appearance quality and product performance, so corresponding 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.

Polishing method of stainless steel surface;

1. mechanical polishing.

Mechanical polishing is a polishing method to obtain a smooth surface by cutting and plastic deformation of the material surface. Generally, oilstone strip, wool wheel and sandpaper are used, and the surface roughness of Ra0.008μm can be achieved by using this technology, which is the highest among various polishing methods.

2. Chemical polishing.

Chemical polishing is to make the micro-convex part of the material surface dissolve before the concave part in the chemical medium, so as to obtain a smooth surface. The main advantages of this method are that it does not need complicated equipment, can polish workpieces with complicated shapes, can polish multiple workpieces at the same time, and has high efficiency. The surface roughness obtained by chemical polishing is generally 65438±00 μm m. ..

3. Electrochemical polishing.

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