Journal
CORROSION SCIENCE
Volume 74, Issue -, Pages 408-413Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2013.04.040
Keywords
Steel; EIS; Polarization; Acid corrosion; Pitting corrosion
Funding
- Shenzhen Municipal Water Affairs Bureau
- Science and Technology Planning Project of Guangdong Province, China [2009B010900035]
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To present simulative study on corrosion of metal by sewage sludge, three kinds of gel-like systems based on SiO2 gel and polyacrylamide gel are proposed. Comparative results of electrochemical polarization and impedance studies together with coupon test of SAE1045 steel under these gel-like surroundings and deionized water are investigated. Obvious pitting corrosion characteristic of the steel can be seen in gel-like systems with decreasing I-corr and more negative value of E-corr. It is considered to be caused by electric field concentration effect at defected sites in covering layer on the surface of the steel formed by gel particles. (C) 2013 Elsevier Ltd. All rights reserved.
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