Chloride ions are widely present, such as salt, sweat, sea water, sea breeze, soil, and so on. In the environment of chloride ion, stainless steel corrodes quickly, even more than ordinary low carbon steel. Chloride ion forms a complex with Fe in the alloying element, which reduces the positive potential of Fe and is then oxidized by the oxidant to remove electrons. Therefore, there is a requirement for the use environment of stainless steel, and it is necessary to wipe frequently to remove dust and keep it clean and dry.
316 and 317 stainless steel are molybdenum-containing stainless steel. The 355 stainless steel has a slightly higher molybdenum content than 316 stainless steel. Since 316 stainless steel contains molybdenum, the total performance of the steel is better than 310 and 304 stainless steel. Under high temperature conditions, when the concentration of sulfuric acid is high. Below 15% and above 85%, 316 stainless steel has a wide range of uses, and 316 stainless steel also has good resistance to chloride attack, so it is usually used in the marine environment.