Journal
CORROSION SCIENCE
Volume 74, Issue -, Pages 396-407Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2013.04.033
Keywords
Stainless steel; Polarization; SEM; Pitting corrosion
Funding
- Ministry of Education, Science Technology (MEST)
- National Research Foundation of Korea (NRF)
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Three duplex stainless steel weldments were produced by changing the chromium element to study the correlation between the pitting corrosion characteristics and the component ratio of the dual phase. The pit morphologies showed that metastable pits were generated at a lower pitting resistance equivalent number (PREN) phase. The secondary austenite phases seemed to serve as a path for the corrosive environment regardless of the ferrite number (FN). There is some discrepancy between the measured values (pitting potential (Er) through polarization test) and expected values (sequence ranked by PREN of weaker phase) in 1 mol l(-1) NaCl solution at 60 degrees C. (C) 2013 Elsevier Ltd. All rights reserved.
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