期刊
CORROSION SCIENCE
卷 60, 期 -, 页码 205-213出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2012.03.035
关键词
Mild steel; Acid solutions; Electrochemical calculation; Weight loss; Acid inhibition
The nitrophenyltriazole derivative, namely 2-[1,2,4]-triazole-methyl-4-acetyl-5-nitrophenyl-[1,3,4]-oxadiazole (TMANO) was synthesized and its inhibiting action on the corrosion of mild steel in 0.5 M H2SO4 solution was investigated by weight loss test, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and scanning electron microscopy (SEM). The selective desorption of TMANO from mild steel surface was also studied by the differential polarization curves. Both thermodynamic and kinetic parameters were calculated and discussed. The results showed that the adsorption of TMANO on steel surface obeys the Langmuir adsorption isotherm. The calculated values of Delta H-ads(0) and Delta S-ads(0) indicated that the adsorption process of TMANO on steel surface was exothermic and accompanied by a decrease in entropy. (c) 2012 Elsevier Ltd. All rights reserved.
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