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This document discusses a case study of corrosion in duplex stainless steel tubes in a petroleum refinery heat exchanger. Analysis found pitting corrosion on the exterior of the tubes exposed to seawater and a hydrocarbon mixture containing 8% hydrogen and 29% hydrogen sulfide. Testing revealed the corrosion products were rich in sulfur, indicating sulfur-induced corrosion. The mechanism is believed to be that above a critical concentration, sulfur can enhance dissolution or block the protective passive fil

Author

Engineer Anas

Language

EN