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Polishing Method of Dual Phase Steel Flange

  • Categories:Company News
  • Author:
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  • Time of issue:2019-09-03 22:17
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(Summary description)Do you know the common polishing methods of dual-phase steel flange? Today Xiaobian will take you to know the common polishing methods of this kind of flange, follow Xiaobian down to see.

Polishing Method of Dual Phase Steel Flange

(Summary description)Do you know the common polishing methods of dual-phase steel flange? Today Xiaobian will take you to know the common polishing methods of this kind of flange, follow Xiaobian down to see. 

  • Categories:Company News
  • Author:
  • Origin:
  • Time of issue:2019-09-03 22:17
  • Views:
Information
Do you know the common polishing methods of dual-phase steel flange? Today Xiaobian will take you to know the common polishing methods of this kind of flange, follow Xiaobian down to see. Polishing Method of Dual Phase Steel Flange
1. There are four polishing methods for dual-phase steel flange: manual, mechanical, chemical and electrochemical. Polishing can improve the corrosion resistance and decoration of flanges. The existing stainless steel electropolishing fluid still uses phosphoric acid and chromium anhydride. During polishing and cleaning, some chromium and phosphorus will be discharged into wastewater, which will pollute the environment.
2. Passivation film will be formed on the surface of dual-phase steel flange, and the oxide film will begin to dissolve. Because the surface of dual-phase steel flange is not uniform, the slightly convex part of the surface dissolves preferentially, and the dissolution rate is higher than that of the concave part. The dissolution and formation of the membrane are almost at the same time, but the speed is different. As a result, the surface roughness of the dual-phase steel flange is reduced and a smooth and glossy surface is obtained.
3. Some surface defects such as pore and scratch can be filled by polishing, which can improve fatigue resistance and corrosive resistance. The yield strength of duplex steel flange is more than twice as high as that of austenitic stainless steel, and it has enough plasticity and toughness required for forming, as well as excellent stress corrosion cracking resistance, especially in chloride ion environment.
Above is the polishing method of dual-phase steel flange shared by the professional manufacturer of Flange Factory today. I hope it will be helpful to you.

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