Journal
CORROSION SCIENCE
Volume 53, Issue 11, Pages 3576-3587Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2011.07.001
Keywords
Low alloy steel; Cobalt; EIS; Polarization; Acid corrosion; Rust
Funding
- Korea Ministry of Knowledge Economy
- Korea Evaluation Institute of Industrial Technology (KEIT) [10031739] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study examines the effect of cobalt addition on the corrosion resistance of low alloy steel in a 10 wt.% sulfuric acid solution at room temperature. All specimens show passive behaviors over the potential range, 0.5-1.55 V-SCE, and the passive current density decreased with increasing Co addition. The Co-containing steels also show higher polarization resistance and lower corrosion rate. The beneficial effect of Co is attributed to the formation of a uniform and continuous rust layer due to an interaction between Co and other elements such as Fe, O and S. (C) 2011 Elsevier Ltd. All rights reserved.
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