☆ 4.5 Article

Electrochemical and quantum-chemical study on newly synthesized triazoles as corrosion inhibitors of mild steel in 1 M HCl

RESEARCH ON CHEMICAL INTERMEDIATES (2017)

期刊

RESEARCH ON CHEMICAL INTERMEDIATES

卷 43, 期 5, 页码 3145-3162

出版社

SPRINGER

DOI: 10.1007/s11164-016-2816-0

关键词

Triazoles; Mild steel; Corrosion inhibitor; Electrochemical test; Fukui index

类别

Chemistry, Multidisciplinary

资金

National Natural Science Foundation of China [51671117]
Shanghai City Committee of science and technology research program key support project [13231203000]

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Protocol

Reagent

摘要

Several newly synthesized triazoles including 1-(2aEuro(3)-nitrobenzyl)methenylideneamino-2-mercapto-5-(1'-(1',2',4'-triazol)) methenyl-1,3,4-triazole (NMTT), 1-(2aEuro(3)-methoxybenzyl)methenylideneamino-2-mercapto-5-(1'-(1',2',4'-triazol)) methenyl-1,3,4-triazole (MMTT), and 1-((4aEuro(3)-chlorobenzyl)methenylideneamino-2-mercapto-5-(1'-(1',2',4'-triazol)) methenyl-1,3,4-triazole (CMTT) were studied as corrosion inhibitors of mild steel in 1 M HCl by weight loss measurements, electrochemical experiments, and quantum-chemical calculations. The experimental results show that these compounds have high inhibition efficiency in the order CMTT > MMTT > NMTT. CMTT at concentration of 1.0 x 10(-3) M showed the highest inhibition efficiency of 96.4 %. The adsorption of the inhibitors on the metal surface obeyed the Langmuir isotherm, and the basic adsorption mechanism is proposed based on quantum-chemical calculations.

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