With the continuous development of social economy, stainless steel flanges are more and more widely used in our daily life. However, in order to improve the corrosion resistance and decoration of large stainless steel flanges, it is necessary to polish the surface of stainless steel flanges, and now there are mainly three kinds of polishing, including manual, mechanical and chemical polishing and electrochemical polishing.
Stainless steel flange polishing method
The chemical polishing of large stainless steel flanges is that the surface of the flange is bright and smooth through regular dissolution. In the chemical polishing process, the surface of the large stainless steel flange continues to form passivation oxide film and oxide film continues to dissolve, and the former is stronger than the latter.
Due to the microscopic inconsistencies on the surface of large stainless steel flanges, the convex part of the surface is preferentially dissolved, and the dissolution rate is greater than that of the concave part
Moreover, the dissolution of the film and the formation of the film are always carried out at the same time, but the rate is different, and the result is that the surface roughness of the large stainless steel flange is smoothed, so as to obtain a smooth and bright surface. Polishing can fill surface pores, scratches and other surface defects, thereby increasing fatigue resistance and corrosion resistance.
Electrochemical polishing is also known as electrolytic polishing, electrolytic polishing is to be thrown large stainless steel flange as the anode, insoluble metal as the cathode, the two poles are immersed in the electrolytic cell at the same time, through the direct current to produce selective anode dissolution
Thus, the surface brightness of the large stainless steel flange increases to achieve the mirror effect. Environmentally friendly electropolishing liquid formula 1 and 2 do not use chromic anhydride, the amount of phosphoric acid is small, this formula reduces pollution emissions.
The formula does not use phosphoric acid and chromic anhydride, solves the environmental problem of wastewater discharge, is a new type of pollution-free environmentally friendly electrochemical polishing agent, its process flow such as process conditions such as process and the original basically the same, the polishing effect is basically the same, to ensure the polishing quality.
In the production process, the surface of stainless steel is prone to some black oxide or microscopic inequality, which affects its use value. Only for its reprocessing such as mechanical polishing, chemical polishing and electrochemical polishing treatment to improve its own value, so the following processes are recommended or may obtain better results.
