The influence of pH value on the efficiency of imidazole based corrosion inhibitors of copper

被引：131
作者：
Curkovic, Helena Otmacic [1 ]
Stupnisek-Lisac, Ema [1 ]
Takenouti, Hisasi [2 ]
机构：
[1] Univ Zagreb, Fac Chem Engn & Technol, Zagreb 10000, Croatia
[2] Univ Paris 06, CNRS, LISE, UPR 15, F-75252 Paris 05, France
来源：
CORROSION SCIENCE | 2010年 / 52卷 / 02期
关键词：
Copper; EIS; Acid inhibition; Neutral inhibition; AERATED 3-PERCENT NACL; ANODIC BEHAVIOR; CHLORIDE; FILMS; BENZIMIDAZOLE; DERIVATIVES; IMPEDANCE; ELECTRODE;
D O I：
10.1016/j.corsci.2009.09.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The aim of this work is to establish the correlation between the solution pH and the inhibiting efficiency of two imidazole compounds (4-methyl-1-phenyl imidazole and 4-methyl-1-(p-tolyl) imidazole) in protection of copper from corrosion in chloride media. It was found that the inhibiting efficiency of both studied imidazoles enhances with the increase of the solution pH value, from about 20% in 0.5 M HCl to 92% in 0.5 M NaCl. This improvement was ascribed to stronger adsorption of neutral imidazole molecule, which can be expected at higher pH values. than that of the protonated imidazole cation, which may be expected in acid solutions. (c) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：398 / 405
页数：8
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