Stainless steel does not rust. A large part of the reason is actually due to the influence of alloying elements in the matrix, mainly because of chromium. The alloying elements in stainless steel can increase the equilibrium potential of the alloy to a certain extent. In this way, in other cases, the corrosion current can be reduced by itself.
In addition, we will actually notice that in the case of chrome, it can make the stainless steel not rust. For its root cause, it is to add chromium directly to the steel as an alloying element, and for its internal chemical changes, it can develop in favor of corrosion damage.
In terms of the corrosion resistance of a stainless steel plate, it mainly depends on its own alloy composition (chromium, nickel, titanium, silicon, aluminum, manganese, etc.) and its internal structure, but it is the key The role is actually the chrome. In the case of chromium, it has a relatively high chemical stability, and can directly form a passivation film on the steel surface, so that the metal and the outside are directly isolated, and the steel plate can be protected from oxidation, so that it can be increased. Corrosion resistance on steel plates.
It is precisely because of this that we will notice that for the stainless steel plate, after the passivation film is destroyed, we will find that it will have a decrease in corrosion resistance.
Finally, we must note that for stainless steel plates, it will not rust forever. When it is in a certain physical and chemical nature, it will appear rust. Therefore, regarding the rust phenomenon of stainless steel plates, we can fundamentally prevent them.
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Hales H.//SMC Editor