Some new triazole derivatives as inhibitors for mild steel corrosion in acidic medium

被引：0
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作者：
Li, Wei-Hua [1 ]
He, Qiao [2 ]
Zhang, Sheng-Tao [2 ]
Pei, Chang-Ling [3 ]
Hou, Bao-Rong [1 ]
机构：
[1] Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
[2] College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
[3] School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China
来源：
Journal of Applied Electrochemistry | 2008年 / 38卷 / 03期
关键词：
Two triazole derivatives, 3,4-dichloro-acetophenone-O-1′-(1′, 3′,4′-triazolyl)-methaneoxime (4-DTM) and 2,5-dichloro-acetophenone- O-1′-(1′,3′,4′-triazolyl)-methaneoxime (5-DTM) were synthesized, and the inhibition effects for mild steel in 1 M HCl solutions were investigated by weight loss measurements, electrochemical tests and scanning electronic microscopy (SEM). The weight loss measurements showed that these compounds have excellent inhibiting effect at a concentration of 1.0 × 10-3 M. The potentiodynamic polarization experiment revealed that the triazole derivatives are inhibitors of mixed-type and electrochemical impedance spectroscopy (EIS) confirmed that changes in the impedance parameters (R ct and C dl) are due to surface adsorption. The inhibition efficiencies obtained from weight loss measurements and electrochemical tests were in good agreement. Adsorption followed the Langmuir isotherm with negative values of the free energy of adsorption δG°ads . The thermodynamic parameters of adsorption were determined and are discussed. Results show that both 4-DTM and 5-DTM are good inhibitors for mild steel in acid media. © 2007 Springer Science+Business Media B.V;
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页码：289 / 295
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