1 stainless steel surface deposited dust or heterogeneous metal particles containing other metal elements of attachment, in the moist air, water and attachment of stainless steel, and the two together into a micro cell, causing the electrochemical reaction, the protective film is damaged, called electrochemical corrosion.
2 stainless steel surface adhesion of organic juice (such as vegetables, soup, sputum), in the case of water oxygen, organic acid, long time organic acid on the surface of metal corrosion.
3 stainless steel surface adhesion containing acid, alkali, salt material (such as wall decoration of alkaline water, lime water splash), caused by the localized corrosion.
4 in air pollution (such as containing a large amount of sulfide, carbon dioxide, nitrogen oxide atmosphere), meets the condensed water to form sulfuric acid, nitric acid, acetic acid, liquid, caused by chemical corrosion.
