Sodium molybdate as a corrosion inhibitor for aluminium in H3PO4 solution

被引：126
作者：
Li, Xianghong [1 ,2 ]
Deng, Shuduan [3 ]
Fu, Hui [1 ]
机构：
[1] SW Forestry Univ, Dept Fundamental Courses, Kunming 650224, Peoples R China
[2] SW Forestry Univ, Key Lab Forest Resources Conservat & Use SW Mt, China Minist Educ, Kunming 650224, Peoples R China
[3] SW Forestry Univ, Fac Wood Sci & Decorat Technol, Kunming 650224, Peoples R China
来源：
CORROSION SCIENCE | 2011年 / 53卷 / 09期
关键词：
Aluminium; EIS; Polarisation; Weight loss; Acid inhibition; MILD-STEEL CORROSION; COLD-ROLLED STEEL; PITTING CORROSION; STAINLESS-STEELS; OXIDE-FILMS; ACID; CHROMATE; ANION; ELECTROLYTE; ADSORPTION;
D O I：
10.1016/j.corsci.2011.05.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The inhibition effect of sodium molybdate (Na2MoO4) on the corrosion of aluminium in 1.0 M H3PO4 solution was studied by weight loss, potentiodynamic polarisation curves and electrochemical impedance spectroscopy (EIS) methods. The results show that Na2MoO4 is a good inhibitor, and the inhibition efficiency obtained by three methods is higher than 84% at 20 mM. The adsorption of Na2MoO4 obeys Freundlich isotherm at lower concentrations (1-7 mM), while Langmuir isotherm at higher concentrations (7-20 mM). Polarisation curves indicate that Na2MoO4 acts as an anodic inhibitor. EIS spectra exhibit three loops (two capacitive loops and one inductive loop). (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2748 / 2753
页数：6
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