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Chromium in stainless steel plate, stainless steel coil in the role of the decision

Chromium in stainless steel plate, stainless steel coil in the role of the decision

Time:2022-04-02 Source:Wuxi Jianuo Special Steel Co., Ltd.

Resolution of stainless steel sexual genus of just one element, which is chromium, each stainless steel contains a certain amount of chromium. So far, there is no stainless steel that does not contain chromium. The reason why chromium has become the main element to resolve the performance of stainless steel, the basic reason is to add chromium to the steel as an alloying element, prompting its internal contradictory transport intention is conducive to resist corrosion damage.

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This change can be clarified from the following aspects.

① chromium makes the iron-based solid solution of the electrode potential progress

② chromium absorption of iron electrons to passivate iron

Passivation is a phenomenon that causes the corrosion resistance of metals and alloys to be improved because the anodic reaction is prevented. There are many theories that constitute the passivation of metals and alloys, mainly the thin film theory, the adsorption theory and the electron alignment theory.