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N2S Corrosion Mechanism

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chemdesign

chemdesign

Chemical
Joined
May 13, 2004
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Can anyone explain the corrosion mechanism of N2S 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.
 
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