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Na2S Corrosion in Aqueous NaOH

Thread starter chemdesign
Start date Oct 12, 2005

Status: Not open for further replies.

Oct 12, 2005

chemdesign

Chemical

Can anyone explain the corrosion mechanism of Na2S to carbon steel in 200 - 250 F aqueous caustic solutions (10% wt. NaOH)? General guidelines in the GPSA manual indicate that Na2S in circulating caustic systems for RSH removal from LPG should be kept at 0.2% wt or less to reduce corrosion, but do not dicuss the mechanism. Thanks.