期刊
CORROSION SCIENCE
卷 89, 期 -, 页码 111-117出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2014.08.014
关键词
Stainless steel; Potentiostatic; SEM; Anodic dissolution
资金
- Grants-in-Aid for Scientific Research [14J00061] Funding Source: KAKEN
Corrosion behaviour of super duplex stainless steel (SDSS) in acidic chloride solution was investigated electrochemically. Potentiostatic polarisations of SDSS at -0.377 and -0.447 V-SHE resulted in selective dissolution of gamma- and alpha-phases, respectively, and were utilized for fabricating single-phase electrodes. Potentiodynamic polarisation curve of SDSS could be calculated from those of single-phase electrodes. The higher corrosion current density and less noble corrosion potential of alpha-phase characterised by galvanic connection with gamma-phase indicated that alpha- and gamma-phases were functioned as the anode and the cathode, respectively, in the corrosion of SDSS. (C) 2014 Elsevier Ltd. All rights reserved.
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