Do you know what are the common polishing methods of duplex steel flanges? Today I will take you to understand the common polishing methods of these flanges, follow me down to see it. Duplex steel flange polishing methods

1, duplex steel flange polishing methods are manual, mechanical, chemical and electrochemical four. Through polishing can improve the corrosion resistance and decorative flange, the existing stainless steel electropolishing solution is still used phosphoric acid and chromic anhydride, in the polishing and cleaning process, there will be some chromium and phosphorus discharged into the wastewater, causing pollution to the environment.

2, duplex steel flange surface will form a passivation film, while the oxide film begins to dissolve. Because the surface of duplex steel flange microscopic inconsistency, the surface of the micro-convex part of the priority dissolution, dissolution rate will be greater than the concave part, film dissolution and formation almost at the same time, but its speed is different. The result is that the surface roughness of duplex steel flange becomes low, to obtain a smooth, glossy surface.

3, by polishing can fill the surface pores, scratches and some other surface defects, and thus improve the fatigue resistance and related corrosion resistance. Duplex steel flange yield strength is more than twice as high as austenitic stainless steel, and there is enough plastic toughness for this molding, and superior stress corrosion rupture resistance, especially in the chloride ion environment.

The above is today's flange factory professional manufacturers and share with you the duplex steel flange polishing method, I hope it will help you.