Polishing Process--Oxidation Technology Surface Finishing

Oxalic acid, sulfuric acid and cromic acid oxidation technologies, especially sulfuric acid anodic oxidation, are widely used in precision processing of stainless steel surface. These oxidation technologies have their own characteristics and application. Oxalic acid can get thicker oxide film, which has decorative color; but this method is costly and consuming much electricity. Sulfuric acid oxidation film layer is transparent, color absorption performance is good, and electrolyte component is simple and stable, the cost is low, so it is widely used. But sulfuric acid tank temperature control is in small range and the temperature rises rapidly, so usually it needs refrigerating installation, which become another problem.

In Japan, sulfuric acid, oxalic acid mixed acid oxidation method was developed early, which become the main oxidation bath liquid in Japan. China carried out the fine sand blasting process after the processing of stainless steel products, factory used mixed acid oxidation technology and their recommended formula is: 10- 20% sulfuric acid; 1-2% oxalic acid; Dc voltage 10v to 20v; Anodic oxidation.

For oxidation liquid heating cooling method, after sand blasting process for fine processing of stainless steel products, the factory used BXO extreme heat exchanger of general machinery factory production experience, thinking that this kind of heat exchanger effect is good. Its advantages include less investment, less land, quick installation, high thermal efficiency, strong corrosion resistance, good seal performance, etc. The heat exchanger is applicable to oxalic acid oxidation liquid. As for model sizes, according to the bath, we can refer to general machinery factory of "extreme heat exchanger selection manual" explanation of the method to calculate.