The role of keto group in cyclic ligand 1,4,8,11-tetraazacyclotetradecane-5,7-dione as strong corrosion inhibitor for carbon steel surface: Experimental and theoretical studies

被引：11

作者：

Daniel Tecuapa-Flores, Eduardo ^{[1
]}

Turcio-Ortega, David ^{[1
]}

Guadalupe Hernandez, Jose ^{[2
]}

Alberto Huerta-Aguilar, Carlos ^{[3
]}

Thangarasu, Pandiyan ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Fac Quim, Ciudad Univ, Mexico City 04510, DF, Mexico

[2] Univ Nacl Autonoma Mexico, Fac Estudios Super FES Aragon, Ctr Tecnol, Mexico City 57130, Estado De Mexic, Mexico

[3] Univ Politecn Valle Mexico, Div Ingn Nanotecnol, Av Mexiquense, Tultitlan 54910, Estado De Mexic, Mexico

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2019年 / 1189卷

关键词：

Corrosion inhibition; DFT; Electrochemical studies; Surface analysis by SEM; AFM; Iron cluster; DENSITY-FUNCTIONAL THEORY; SCHIFF-BASE COMPOUNDS; MILD-STEEL; STAINLESS-STEEL; CATIONIC SURFACTANTS; FRONTIER ORBITALS; ACIDIC MEDIA; DERIVATIVES; ADSORPTION; PERFORMANCE;

D O I：

10.1016/j.molstruc.2019.04.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The performance of 1,4,8,11-tetraazacyclotetradecane (L-1) and 1,4,8,11-tetraazacyclotetradecane-5,7-dione (L-2) as corrosion inhibitors was investigated electrochemically, showing that inhibitor L-2 acts effectively as it yields low polarization currents with high impedance loop diameter. The metal surface analyzed by SEM, EDS and AFM reveals that deep holes observed in HCl alone were not seen in the presence of inhibitors, maintaining the content of Fe in the steal about 95% without detecting oxygen in EDS. The adsorption of inhibitor with the metal (186 Fe atoms) was studied theoretically, observing there is a strong interaction between L-2 and metal than for L-1. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：131 / 145

页数：15

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