The chloride ion content in water has an impact on the corrosion of stainless steel
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The corrosion resistance of stainless steel relies entirely on its passivation film; for austenitic stainless steel, high levels of chloride ions in water can cause localized pitting of the surface passivation film. These pitting not only cause perforations in the tube wall but also serve as the starting points for stress corrosion cracking cracks. Stress corrosion cracking can occur when there are dozens of ppm of chloride ions in the solution; the higher the chloride ion concentration, the greater the susceptibility of austenitic stainless steel to stress corrosion cracking.
The chloride content in water has a significant impact on the corrosion of stainless steel. High concentrations of chloride ions can destroy the passivation film on the surface of stainless steel, leading to pitting and stress corrosion cracking. Even tens of ppm of chloride ions can cause stress corrosion cracking; the higher the chloride ion concentration, the greater the corrosion susceptibility of stainless steel. .