The corrosion resistance of AUSTENITIC ASTM A240 316L stainless steel sheets

The corrosion resistance of AUSTENITIC ASTM A240 316L stainless steel plate is mainly determined by its alloy composition (chromium, nickel, titanium, silicon, aluminum, manganese, etc.) and internal structure. The main function is chromium, and chromium is very high. Chemical stability, can form a passivation film on the surface of AUSTENITIC ASTM A240 316L stainless steel plate, so that the metal is isolated from the outside, protect AUSTENITIC ASTM A240 316L stainless steel plate from oxidation, increase the corrosion resistance of the steel plate, after the passivation film is destroyed Corrosion resistance is reduced.

The corrosion resistance of AUSTENITIC ASTM A240 316L stainless steel sheets may be affected if:

1. The surface of AUSTENITIC ASTM A240 316L stainless steel plate contains dust or other metal particles attached to other metal elements. In humid air, the condensate between the attached material and the stainless steel is connected into a micro battery. The electrochemical reaction is triggered and the protective film is destroyed, which is called electrochemical corrosion.

2. AUSTENITIC ASTM A240 316L stainless steel plate adheres to organic juice (such as melon, noodle soup, glutinous rice, etc.), which forms an organic acid in the presence of water and oxygen. The organic acid corrodes the metal surface for a long time.

3. AUSTENITIC ASTM A240 316L stainless steel plate adheres to acid, alkali, and salt substances (such as alkali water and lime water splashing on the wall), causing local corrosion.

4. In polluted air (such as the atmosphere containing a large amount of sulfide, carbon oxide, nitrogen oxide), in the case of condensed water, sulfuric acid, nitric acid, acetic acid liquid point is formed, causing chemical corrosion.
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