Inhibition of Mild Steel Corrosion by some Phenyltetrazole Substituted Compounds in Hydrochloric Acid

被引：31

作者：

Elkacimi, Y. ^{[1
]}

Achnin, M. ^{[3
]}

Aouine, Y. ^{[2
]}

Touhami, M. Ebn ^{[1
]}

Alami, A. ^{[2
]}

Touir, R. ^{[1
]}

Sfaira, M. ^{[3
]}

Chebabe, D. ^{[1
]}

Elachqar, A. ^{[2
]}

Hammouti, B. ^{[4
]}

机构：

[1] Univ Ibn Tofail, Fac Sci, Lab Mat Electrochem & Environm, BP 133, Kenitra 14000, Morocco

[2] Sidi Mohammed Ben Abdellah Univ, Fac Sci Dhar El Mahraz, Lab Organ Chem, Atlas Fez 30000, Morocco

[3] Sidi Mohammed Ben Abdellah Univ, Fac Sci Dhar El Mahraz, Lab Mat Engn Modelling & Environm, Atlas Fez 30000, Morocco

[4] Mohammed 1st Univ, Fac Sci, LCAE URAC18, Oujda 60000, Morocco

来源：

PORTUGALIAE ELECTROCHIMICA ACTA | 2012年 / 30卷 / 01期

关键词：

corrosion; inhibition; phenyltetrazole; mild steel; acid medium; potentiodynamic polarization; EIS;

D O I：

10.4152/pea.201201053

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Phenyltetrazole substituted compounds, namely 5-phenyl-1H-tetrazole (PT), 5-(4chlorophenyl)-1H-tetrazole (Cl- PT), 5-(4-methoxyphenyl)-1H-tetrazole (MO-PT) and 5-p-tolyl-1H-tetrazole (M-PT) were synthesized to study their inhibition behavior on mild steel in 1 M HCl by weight loss measurement, potentiodynamic polarization studies and electrochemical impedance spectroscopy (EIS). It has been observed that corrosion rate decreases and inhibition efficiency increases with increasing in phenyltetrazole substituted concentration and dependence on molecular structure. Polarization data indicate that these compounds act as very good cathodic inhibitors of mild steel in 1 M HCl. The result showed that the inhibition efficiency decreased with temperature and increased with immersion time. EIS has the same trend of inhibitive effect as that of the polarization data, which indicates the formation of a protective layer on mild steel surface by molecules adsorption.

引用

页码：53 / 65

页数：13

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