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Why stainless steel valve surface rust
- Jan 23, 2017 -

Stainless steel depends on its surface to form a layer of very thin but strong fine stable of chromium-rich oxide film (protective film), preventing oxygen atoms continue to infiltrate and oxidation, and resistance to corrosion. If for some reason, this film has been the growing destruction of, air or oxygen atoms in the liquid will become increasingly infiltrate or metal iron atoms on the left and forming loose oxide, corrosion of metal surfaces will be kept. Many forms of damage to the surface film, common in everyday life are the following:
1. stainless steel accumulation on the surface of other metal dust or alien particles is attached, in the humid air, fixtures and stainless steel condensate, connecting them into a micro-cell, triggering chemical reactions, damage the protective film, called electro-chemical corrosion.
2. stainless steel valve adhesive organic juice, 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, causing corrosion.
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. The above may result in corrosion of the protective film on stainless steel surface the damage caused.