In the field of marine engineering, the selection of valves is crucial, among which 316 stainless steel ball valves and 304 stainless steel ball valves are common choices. However, the corrosion of these stainless steel ball valves by the large amount of chloride ions in the marine environment is a serious problem, which will affect the performance and service life of the valves, and even threaten the safe and stable operation of the entire marine engineering system. Let's discuss in detail the situation of these two stainless steel ball valves in the marine environment and the solution for preventing chloride ion corrosion.