Abstract
The corrosion behaviors of A3 steel in different pH, 3.5%NaCl, modified zinc phosphate and aluminum triphosphate extract solutions have been studied by EIS. Results show:(a) The resistance increases with the increase of pH value under the same circumstances, but the capacity is the reverse.(b) Zinc phosphate, because of its low solubility, shows no inhibitive performance for A3 steel in 3.5% NaCl extract solutions. (c) Aluminum triphosphate has good inhibitive performance for A3 steel in 3.5% NaCl extract solutions at a pH of 6, probably because the triphosphate ion can complex with the corrosion_product, such as ferric and ferrous ions, and form a compact protective film that separates effectively the steel substrate from the aggressive media at the steel surface. (d) The solubility of the anticorrosive pigment is one of the most important factors for its inhibitive performance.
Keywords
A3 steel, Pigment extract solution, Electrochemical impedance spectroscopy
Publication Date
2001-08-28
Online Available Date
2001-08-28
Revised Date
2001-08-28
Received Date
2001-08-28
Recommended Citation
Zhi-jun GU, Yong-gui LIAO, Zhi-gang ZHANG, Qi-long GUO, Fang-teng SU, Wen-yun HU, Yan-zhen CHEN.
Electrochemical Impedance Spectroscopy Study on A3 Steel in Anti-corrosive Pigment Extract Solution[J]. Journal of Electrochemistry,
2001
,
7(3): Article 16.
DOI: 10.61558/2993-074X.3264
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol7/iss3/16
References
[1] AmirudinA ,ThierryD ,etal.Evaluationofanti_corrosivepigmentsbypigmentextractstudies,atmosphericexposureandelectrochemicalimpedandcespectroscopy[J].ProgressinOrganicCoatings,1995,25:339.
[2] LiangF ,CaoCN ,etal.Oneffectofaddedtitaniumpolyphosphatesandmagneticferricoxidesontheper formanceoforganiccoatings[J].Corrosionscienceandprotectiontechnique,1992,4(2):87.
[3] EvansUR .AnIntroductiontoMetallicCorrosion(3rdedition),PassivityandInhibition[M ].London:E .Arnold.1982:178
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