In the u-type screw conveyor process, the stainless steel appearance due to the oxidation of oxidation will appear black, yellow skin.In order to improve the appearance and corrosion resistance of stainless steel, processed stainless steel must take the pickling passivation treatment.Acid pickling removes the welding and oxide produced after high temperature processing.So that it can make the surface of the stainless steel bright silver light, and the treated surface forming a layer of oxide film.And then it will not produce secondary oxygen erosion, thereby improving the quality of surface corrosion of stainless steel products , prolong the service life of equipment.
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| shaft of screw conveyor |
（2）What is acid pickling processing?
Acid pickling processing is one way to clean metal surface，With acid solution to remove scale and rust on the steel surface method.Metal surface after pickling was silvery white, while the passive surface and improve the corrosion resistance of stainless steel.Pickling process currently used due to the long pickling time, leading to high processing costs. In view of this situation, usually at room temperature fast pickling process. The process under room temperature can quickly remove thick stainless steel surface oxide, especially for welding black and inclusion removal effect is good, clean and bright surface after pickling, non-volatile light fading, yellowing.More information or any interest, please visit www.pkmachinery.com
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| u-type screw conveyor |
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