Triazole derivatives as corrosion inhibitors for mild steel in hydrochloric acid solution

doi:10.1016/S1006-7191(08)60096-4

Acta Metallurgica Sinica (English Letters) ›› 2009, Vol. 22 ›› Issue (4): 247-254.DOI: 10.1016/S1006-7191(08)60096-4

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Triazole derivatives as corrosion inhibitors for mild steel in hydrochloric acid solution

Fengling XU^1,2,Baorong HOU¹

1) Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2) Graduate School of Chinese Academy of Sciences, Beijing 100039, China

Received:2008-09-08 Revised:2008-11-25 Online:2009-08-25 Published:2009-10-10
Contact: Baorong HOU

Abstract

Abstract:

The title compounds 1-(4,5-dihydro-3-phenyl pyridine-1-yl)-2-(1H-1,2,4-triazole-1-yl) ethyl ketones were studied as a corrosion inhibitor in a mild steel in 1 mol /L hydrochloric acid solution using weight loss measurement, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). Results indicated that these compounds had excellent inhibition properties. Polarization curves indicated that the inhibitor behaved mainly as mixed-type inhibitor. The EIS results showed that the charge transfer controlled the corrosion process in the uninhibited and inhibited solutions. Adsorption of the inhibitor on the mild steel surface followed Langmuir's adsorption isotherm with negative value of the free energy of adsorption ΔG°_ads. The thermodynamic parameters of adsorption were determined and discussed.

Key words: Materials protection, Acid inhibitor, Triazole-type compound, Electrochemical measurement

Fengling XU,Baorong HOU. Triazole derivatives as corrosion inhibitors for mild steel in hydrochloric acid solution[J]. Acta Metallurgica Sinica (English Letters), 2009, 22(4): 247-254.

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Triazole derivatives as corrosion inhibitors for mild steel in hydrochloric acid solution

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