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How to deal with the rust of stainless steel plate material?

Ningbo Qiyi Precision Metals Co.,Ltd | Updated: Feb 01, 2019

Stainless steel acid-resistant steel material is abbreviated as stainless steel plate material, which is composed of two parts: stainless steel plate material and acid-resistant steel. Steel that resists atmospheric corrosion is called stainless steel sheet material, and steel that resists corrosion from chemical media (such as acids) is called acid-resistant steel. Generally speaking, steel with a chromium content of WCR greater than 12% has a stainless steel characteristic. Stainless steel sheet material has better corrosion resistance than ordinary steel because the stainless steel sheet material contains gold elemental chromium, which can form a kind on the surface. A very thin and strong protective film, a chromium-rich oxide film. Therefore, the stainless steel plate material has better corrosion resistance than ordinary steel materials. But does the stainless steel sheet material not rust? Many people are misunderstood by its name. The facts show that it is not rusting, because the natural passivation film on the stainless surface is relatively loose, that is, in an active state, at a position where the potential is negative. Therefore, the corrosion resistance of the stainless steel sheet material which has not been passivated is "unpredictable".


So how can we really stop "rust"?


That is to do the passivation treatment. The function of the passivation is to soak the surface of the stainless steel plate material with the passivation solution, and produce a micro-chemical reaction on the surface to promote the formation of a complete continuous passivation film on the metal surface, which is active in the original chemical nature. The metal surface is transformed into a chemically inert metal surface to achieve a chemical reaction that is isolated from foreign substances, thereby achieving long-term rust prevention. Therefore, only after passivation treatment can the real no rust be achieved. Stainless steel sheet materials have unique properties such as unique strength and superior anti-corrosion properties, which make their application prospects wider and wider, but the development of stainless steel sheet materials depends largely on the development of its surface treatment technology. At present, the surface treatment technology of stainless steel plate materials mainly includes passivation of stainless steel plate materials, electrolytic polishing of stainless steel plate materials, pickling of stainless steel plate materials, and the like.


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