Stainless steel corrosion causes

All metals are reaction and oxygen in the atmosphere, the formation of oxide film on the surface. Unfortunately, the iron oxide in the form of ordinary carbon steel to oxidation of, make the corrosion expansion, eventually forming holes. You can use paint or oxidation resistant metal (for example, zinc, nickel and chromium) plating to ensure the carbon steel surface, but, as everyone knows, this protection is only a thin film. If the layer is destroyed, the following steel began to rust.

Stainless steel corrosion resistance depends on the chromium, but because the chromium steel is one of the components, so the protection method is not the same as.

In addition to 10.5% chromium, atmospheric corrosion resistant steel increased significantly, but the chromium content is higher, although still can improve corrosion resistance, but not obvious. The reason is that the use of alloying steel with chromium, the type of surface oxides change has become similar to the pure chromium metal oxides on the surface of the formation of. This close adhesion chromium oxide protection surface, prevent further oxidation. This very thin oxide layer, through which you can see the steel surface natural luster, make the stainless steel has a unique surface. And, if the damaged surface, the exposed steel surface and atmospheric response to self repair, to form the "film", continue to play a protective role.

Therefore, all stainless steel has a common characteristic, that is, the chromium content in more than 10.5%.