The effect of propargylic alcohol on the corrosion inhibition of low alloy CrMo steel in sulphuric acid

被引：46
作者：
Gojic, M [1 ]
机构：
[1] Univ Zagreb, Fac Met, Sisak 44103, Croatia
来源：
CORROSION SCIENCE | 2001年 / 43卷 / 05期
关键词：
low alloy steel; corrosion inhibition; propargylic alcohol; adsorption;
D O I：
10.1016/S0010-938X(00)00128-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of propargylic alcohol (PA) on the corrosion inhibition of low alloy CrMo steel in sulphuric acid at the open circuit potential E-oc was investigated by DC-polarization and AC-impedance spectroscopy measurements, respectively. It was found that the addition of PA induced the positive shift of E-oc and the decreasing of cathodic currents. The anomalous Tafel cathodic slopes were explained using a modified adsorption-interaction model. The inhibition process was treated as the substitutional adsorption process. The adsorption of PA was fitted well by means of Flory-Huggins isotherm. The standard free energy of adsorption of PA was calculated (-15 kJ mol(-1)). (C) 2001 Elsevier Science Ltd. All rights reserved.
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页码：919 / 929
页数：11
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