The principle is to achieve bright and smooth through regular dissolution; Method: Use mechanical, chemical or electrochemical effects to reduce the surface roughness of the workpiece to obtain a bright and smooth surface. It is the use of polishing tools and abrasive particles or other polishing media to modify the surface of the workpiece.
The oxidation is divided into aluminum hard oxidation, die casting aluminum oxidation, color oxidation, aluminum anodic oxidation, natural color oxidation and so on.
The principle can be explained by thin film theory. Passivation is due to the interaction of metal and oxidizing substances. When it acts, a very thin, dense, and good-covering passivation film is formed on the metal surface. . Compared with the traditional physical sealing method, the passivation treatment has the characteristics of not increasing the thickness of the workpiece and changing the color, improving the precision and added value of the product, and making the operation more convenient.
Link to this article：Introduction to hardware surface treatment knowledge
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