期刊
CORROSION SCIENCE
卷 50, 期 5, 页码 1433-1440出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2007.12.007
关键词
steel; polarization; modelling studies; acid corrosion
The hydrogen evolution reaction (HER) occurring on steel in an oxygen-free aqueous solution containing dissolved CO2 was investigated. This reaction was modelled by taking into account the two dissociation reactions of dissolved CO,. The mathematical problem was solved numerically using a finite element method (FEM). A fair agreement between the measurements performed on a steel rotating disc electrode and the theoretical calculations was obtained. Thus, the cathodic behaviour of steel in CO2-containing solutions can be fully explained by the buffering effect induced by the presence Of CO2. Some interfacial pH measurements performed on a gold electrode also support this conclusion. (c) 2008 Elsevier Ltd. All rights reserved.
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