Although stainless steel seamless pipes have corrosion resistance, they cannot withstand any corrosion!
What corrosive media can stainless steel seamless pipes withstand?
1. Chloride ion erosion
Chloride ions (such as salt water and sweat) can damage the passivation film on the surface of seamless pipes, causing pitting corrosion or stress corrosion cracking, especially for 304 steel pipes, which pose a high risk in salt spray environments. Marine engineering, chemical pipelines, and coastal facilities are all high-risk scenarios.
2. Strong reducing acid
Hydrochloric acid: All stainless steels will be rapidly corroded, causing thinning and perforation of the pipe wall.
Dilute sulfuric acid: 304 steel pipes may be corroded, while 316 is slightly corrosion-resistant due to the presence of molybdenum, but still dangerous at high concentrations.
3. High temperature concentrated alkali
Normal temperature alkaline solution is not harmful, but above 200 ℃+50% sodium hydroxide may corrode austenitic stainless steel.
Summary: Avoid environments with chloride ion enrichment, strong reducing acids, high temperature and concentrated alkali, and service with injuries!