Surface treatment can be divided into four aspects:
1, mechanical surface treatment: sandblasting, shot blasting, polishing, rolling, polishing, brushing, spraying, painting, oil and so on.


2, chemical surface treatment: blue and black, phosphating, pickling, electroless plating of various metals and alloys, TD treatment, QPQ treatment, chemical oxidation, etc.


3, electrochemical surface treatment: anodic oxidation, electrochemical polishing, electroplating, etc.


4, modern surface treatment: chemical vapor deposition CVD, physical vapor deposition PVD, ion implantation, ion plating, laser surface treatment, etc.


5, pickling passivation treatment: it refers to the metal parts immersed in the pickling passivation solution until the workpiece surface becomes uniform and has been silver white to complete the process, not only simple operation, and low cost, pickling passivation solution can be repeatedly used.

6, electrolytic polishing treatment: technology refers to the electrolytic polishing, also known as electrochemical polishing, refers to the workpiece in the energized solution, in order to improve the surface of the metal workpiece flatness, and make it produce luster processing process.
Almost all metals can be electrolytically polished, such as stainless steel, carbon steel, titanium, aluminum alloy, copper alloy, nickel alloy, but stainless steel is the most widely used.
Through the current of the positive and negative electrodes and the co-action of the electrolytic polishing fluid, the microscopic geometry of the metal surface is improved and the roughness of the metal surface is reduced.
So as to achieve the purpose of the workpiece surface bright and smooth.