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What are the measures to prevent pitting corrosion of stainless steel pipes?

by:HHGG     2021-03-30
What are the measures to prevent pitting corrosion of stainless steel pipes? 2019-01-09 Corrosion occurs at individual points on the surface of stainless steel pipes and then expands in depth. Pitting corrosion on the outer surface of stainless steel pipes during use is called pitting corrosion. Stainless steel pipe manufacturers have accumulated 13 years of production experience, and produce each pipe with heart. Professional stainless steel pipe manufacturers analyze the causes of pitting corrosion on the surface of stainless steel pipes: The pitting corrosion of stainless steel pipes mainly occurs in aqueous media containing halogen ions, such as Cl-, Br-, and F-. Pitting corrosion is caused by these active ions destroying the passive film on the weak part of the passive film on the surface of the stainless steel tube. If there are iron particles, dust, dirt and other attachments on the surface of stainless steel, as well as inclusions such as MnS and some intermetallic compounds, pitting corrosion is also easy to occur.    So what are the measures to prevent pitting corrosion of stainless steel pipes? We can clean and maintain the surface of stainless steel pipe regularly; improve the purity of steel and reduce the content of non-metallic inclusions such as MnS; select stainless steel pipes with high pitting resistance equivalent value, namely high chromium, molybdenum and high chromium, molybdenum, nitrogen stainless steel . In any medium containing Cl- and seawater, increase the flow rate ≥1.5m/s to prevent sediments and marine organisms from adhering to the surface of the stainless steel pipe.   For knowledge about stainless steel pipes, please follow the news on the website of stainless steel pipe manufacturers at any time.  
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