Corrosion Reason Of PVC Hose
The metal reacts with oxygen in the atmosphere to form an oxide film on the surface. Iron oxide, formed on ordinary carbon steel, continues to oxidize, causing corrosion to continue to expand and eventually form voids. Coatings can be made by coating or oxidizing metals (e.g., zinc, nickel, and chromium) to ensure the surface of carbon steel, but, as everyone knows, this kind of protection is only a film. If the protective layer is damaged, the steel begins to rust.
The content of stainless steel corrosion resistance depends on chrome, when the addition of chromium to 10.5%, atmospheric corrosion resistant steel increased significantly, but the chromium content is higher, although still improve corrosion resistance, but not obvious. The reason is that alloying of steel with chromium changes the type of surface oxide to a surface oxide similar to that of pure chromium metal. This close adhesion chromium oxide protection surface, prevent further oxidation. This oxide layer is extremely thin, through it can see the natural burnish of stainless steel surface, make the stainless steel has unique surface. Moreover, if the surface is damaged, the exposed steel surface will react with the atmosphere for self repair and re form the "passive film" and continue to play a protective role.
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