Reason why raw water pressure testing cannot be used for stainless steel pipes
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Why is it necessary to use deionized water? Can some expert explain this?
Chloride ions in water; high concentrations can cause stress corrosion cracking in stainless steel
The main forms of corrosion of stainless steel include uniform corrosion, pitting corrosion, crevice corrosion, intergranular corrosion, and stress corrosion. In media containing chloride ions, Cr-Ni steels are also prone to corrosion due to the breakdown of their passivation layer
Chloride ions in raw water can cause pitting in stainless steel; therefore, demineralized water must be used
It’s mainly chloride ions, which must not exceed 25PPM
Chlorine corrosion is sensitive to stainless steel.
You can think of it this way: stainless steel is allergic to “Cl ions”.