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Stainless steel screws rusted in several ways
1. alien particles is dust or attachment, in moist air, condensation water fixtures with stainless steel screws, connecting them into a micro-cell, triggering chemical reactions, damage the protective film, called electro-chemical corrosion.
2. stainless steel screw adhesive juice of organic matter (such as vegetables, noodle soup, phlegm, etc), in case water oxygen to form organic acids and organic acids on corrosion of metal surfaces for a long time.
3. stainless steel adhesive containing acids, alkalis, salts (such as decorating the walls of the soda water and lime water splash), causing local erosion.
4. where there is pollution in the air (which contain a lot of sulphides, carbon oxide, nitrogen oxides the atmosphere), condensate, forming sulfuric acid, nitric acid, acetic acid, causing corrosion.
Above may cause corrosion of the protective film on the surface of stainless steel screw damage caused. So, in order to ensure permanent light surface of stainless steel screws, no corrosion. We shall have to do cleaning on its surface. Passivation treatment.
To sum up, our daily work lives when using stainless steel screws, must be above 4, prevent rusting of stainless steel screws lightly.
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