In the production process of stainless steel precision casting, its sulfuric acid oxide film is an important factor affecting the high purity and transparency of its stainless steel casting oxide film. The porosity, purity, thickness and sealing quality of stainless steel precision casting will directly interfere with the mirror effect of the casting

If there are many impurities in the oxide film in stainless steel precision casting, its purity will be low and the transparency will be reduced. The impurities in the oxide film mainly come from the stainless steel casting itself, and part of it comes from the oxidation bath. Therefore, by appropriately reducing the content of alloy elements in the casting, the impurity content can be reduced as much as possible.