Synergistic effect between non-ionic surfactant and halide ions in the forms of inorganic or organic salts for the corrosion inhibition of stainless-steel X4Cr13 in sulphuric acid

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• 作者：R. Fuchs-Godec^a ; ^{fuchs@uni-mb.si} ; Miomir G. Pavlović ; ^b
• 关键词：Corrosion inhibitor ; Mixtures ; Non-ionic surfactant ; Halogenide ions ; Flory&ndash ; Huggins isotherm ; Sulphuric acid
• 刊名：Corrosion Science
• 出版年：2012
• 期刊代码：28_0010938x
• 类别：ch
• 出版时间：May, 2012
• 卷：58
• 期：Complete
• 页码：192-201
• 文件大小：2108 K

摘要

The inhibition behaviour of the TRITON-X-405 mixed with KBr or C₄H₁₂NI in 2.0 M H₂SO₄ on the ferritic SS was studied using potentiodynamic and EIS measurements. The electrochemical data showed that mixtures used in this study adsorbed on the SS鈥檚 surface, in agreement with the Flory-Huggins adsorption isotherm. Polarization and EIS measurements indicated that KBr or C₄H₁₂NI had a significant synergistic effect with TRITON-X-405 in 2.0 M H₂SO₄. This effect was more pronounced when adding C₄H₁₂NI, and at concentrations above the CMC of the used mixtures, which had been determined via corrosion-kinetic parameters. The inhibitive mechanism is proposed.