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Corrosion Investigation of Duplex Stainless Steels in Chlorinated Solutions
Author(s) -
Kahram Mohaddeseh,
Asnavandi Majid,
Koshy Pramod,
Sorrell Charles Christopher
Publication year - 2015
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201400293
Subject(s) - dissolution , pitting corrosion , materials science , corrosion , metallurgy , duplex (building) , electrochemistry , ferrite (magnet) , crevice corrosion , hypochlorite , electrode , chemical engineering , inorganic chemistry , composite material , chemistry , dna , biochemistry , engineering
The corrosion of duplex stainless steel 2205 was investigated both under service conditions and via an electrochemical study in chlorinated media. The steel sample surfaces showed pitting, crevice and selective dissolution, with the ferrite phase being more susceptible to dissolution in this media. The dissolution of MnS was identified to be a contributing factor for pitting corrosion, while electrochemical investigations revealed that the presence of hypochlorite ions caused a switching from a general corrosion phenomenon to a localized one.