Journal
CORROSION SCIENCE
Volume 81, Issue -, Pages 144-151Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2013.12.013
Keywords
Stainless steel; Polarization; AES; Stress corrosion; Pitting corrosion; Pourbaix diagram
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Corrosion test, surface analysis and thermodynamic calculation were carried out in the H2S-Cl- environments to clarify the role of alloyed Cu on the corrosion resistance of austenitic alloys. The alloyed Cu improved pitting corrosion resistance in the H2S-Cl- environment. The surface film of Cu-containing alloy indicated double layer consists of copper sulfide and chromium oxide, and the copper sulfide was able to exist stably compared to iron sulfide and nickel sulfide. It is concluded that the copper sulfide would enhance the formation of chromium oxide film which improve the pitting corrosion resistance in the H2S-Cl- environment. (C) 2014 Elsevier Ltd. All rights reserved.
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