期刊
CORROSION SCIENCE
卷 111, 期 -, 页码 711-719出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2016.06.006
关键词
Low alloy steel; Weight loss; Polarization; EIS; Acid corrosion; Passivity
资金
- National Natural Science Foundation of China (NSFC) [51371034]
Corrosion rate of 6.5%Cr steel was considerably lower than that of carbon steel and 3%Cr steel. Current density underwent a drop in certain potential range when potentiodynamic polarization curve was tested. Microscope with camera was used for in situ recording of the change in steel surface. The flaking off of the film, which occurred at a certain potential range, was recorded. The results of electrochemical measurements indicated that the film, which mainly consisted of Cr(OH)(3), was a pseudopassive film. When 6.5%Cr steel was polarized or corroded, pseudopassive film formed. Pseudopassivation of 6.5%Cr steel was closely related to low corrosion rate. (C) 2016 Elsevier Ltd. All rights reserved.
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