期刊
CORROSION SCIENCE
卷 63, 期 -, 页码 379-386出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2012.06.017
关键词
Steel; Acid corrosion; Acid inhibition; Electrochemical calculation
The intensity of localised corrosion of steel in the Evans solution has been evaluated by means of an, electrochemically integrated multi-electrode array namely the wire beam electrode. A new parameter namely the localised corrosion intensity index (LCII) has been employed to quantify the degree of localisation of corrosion and the effect of pH alteration on the intensity of localised corrosion. A major variation in the LCII has been found to indicate a change in corrosion mechanism; In a typical experiment, the LCII dropped dramatically from approximately 1 to 0.02 when a pH modifier was added to the Evans solution, leading to the change of corrosion mechanism from highly localised pitting corrosion to general or uniform corrosion. (C) 2012 Elsevier Ltd. All rights reserved.
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