Chloride ions are ubiquitous, such as salt, sweat, sea water, sea breeze, soil and so on. Stainless steel corrodes rapidly in the presence of chloride ions, even more than ordinary low-carbon steel. Chloride ions form a complex with Fe in alloy elements, which reduces the positive potential of Fe and is oxidized by oxidizing agent after taking away electrons.

 

Therefore, there are requirements for the use of stainless steel environment, and often need to wipe, remove dust, keep clean and dry.

 

316 and 317 stainless steels are molybdenum-containing stainless steels. The molybdenum content of 317 stainless steel is slightly higher than that of 316 stainless steel. Due to the molybdenum content in 316 stainless steel, the overall performance of 316 stainless steel is better than 310 and 304 stainless steel. At high temperature, 316 stainless steel has a wide range of applications when the concentration of sulphuric acid is lower than 15% and higher than 85%. 316 stainless steel also has good chloride resistance, so it is usually used in marine environment.