What organic substances are corrosive to stainless steel 316?

2011-08-18View Original

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What organic substances are corrosive to stainless steel 316?

Reply #22011-08-18

Reply to 2# yuanzhuolin: Thank you for your answer. I was wondering about the corrosive effect of organic substances such as dichloromethane and dichloroethane on stainless steel; could you please provide more details?

Reply #32011-08-19

Dichloromethane decomposes when exposed to high temperatures or light, releasing chloride ions. Ordinary stainless steel is not resistant to these chloride ions and can suffer from pitting corrosion; materials such as 304 are examples of such steel. If stainless steel must be used, 316L is a good choice as it has better resistance to chloride-induced corrosion. Dichloroethane is preferably anhydrous. Chloroalkanes decompose more rapidly in the presence of water, producing hydrochloric acid. If hydrochloric acid is present, then stainless steel won’t work.

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