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标题：Inhibitive characteristics of cetylpyridinium chloride and potassium chromate addition on type A513 mild steel in acid/chloride media
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作者：O.S.I. Fayomi ; A.P.I. Popoola ; T. Oloruntoba 等
期刊名称：Cogent Engineering
电子版ISSN：2331-1916
出版年度：2017
卷号：4
期号：1
页码：1318736
DOI：10.1080/23311916.2017.1318736
语种：English
出版社：Taylor and Francis Ltd
摘要：Abstract Linear polarization resistance and open circuit potential methods were used to assess the inhibitive and adsorption behaviour of Potassium chromate (K₂CrO₄) and Cetylpyridinium chloride (CPC) on mild steel (MS) in HCl/NaCl solution. Results obtained show that K₂CrO₄ and CPC inhibit MS significantly against massive degradation. However, under open circuit potential method, inhibition efficiency of K₂CrO₄ decreased at higher concentration. The synergistic effect of both inhibitors is positive on the protection of mild steel against corrosion. An inhibitive efficiency of over 60% was recorded for the combined admixture. Morphological study showed that the exposed steel with the presence of K₂CrO₄ and CPC possess some corrosion product with lesser pitting effect compare to unprotected steel with severe surface deterioration and uniform corrosion degradation. The corrosion inhibition performance of K₂CrO₄ and CPC on mild steel surface was found to follow Langmuir adsorption isotherm model.
关键词：mild steel ; polarization ; interfaces ; passivation ; micrographs