Synergistic effect of mixing cationic and nonionic surfactants on corrosion inhibition of mild steel in HCl: Experimental and theoretical investigations

[Display omitted] We studied the inhibition performances of IMB (imidazoline quaternary salt (IM) and benzotriazole (BTAH)) and IMO (IM and octyl phenol ethoxylates (OP)) mixtures as inhibitors of L245 steel placed in 10 vol% HCl solution at 298 K using experimental methods and theoretical calculati...

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Published inJournal of colloid and interface science Vol. 516; pp. 398 - 406
Main Authors Han, Peng, Chen, Changfeng, Li, Weihua, Yu, Haobo, Xu, Yizhen, Ma, Lei, Zheng, Yanjun
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 15.04.2018
Subjects
Carbon steel
Electrochemistry
Inhibitor
Theoretical investigation
Weight loss
Electrochemistry
Carbon steel
Inhibitor
Weight loss
Theoretical investigation
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Summary:[Display omitted] We studied the inhibition performances of IMB (imidazoline quaternary salt (IM) and benzotriazole (BTAH)) and IMO (IM and octyl phenol ethoxylates (OP)) mixtures as inhibitors of L245 steel placed in 10 vol% HCl solution at 298 K using experimental methods and theoretical calculations. We found that the mixtures adsorb on the steel by an endothermic spontaneous process, and the adsorption model follows Langmuir isotherm. The mixtures exhibit good synergistic inhibition effect, and the inhibition efficiency enhanced in turn (IMB < IMO). The relationship between synergistic effect of organic inhibitors and their energetic position of molecular frontier orbitals was discussed.
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content type line 23
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2018.01.088