Corrosion inhibition of austenitic stainless steel by some pyrimidine compounds in hydrochloric acid

被引：36
作者：
Caliskan, N. [1 ]
Akbas, E. [2 ]
机构：
[1] Yuzuncu Yil Univ, Dept Phys Chem, Fac Sci & Letters, TR-65080 Van, Turkey
[2] Yuzuncu Yil Univ, Dept Organ Chem, Fac Sci & Letters, TR-65080 Van, Turkey
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2012年 / 63卷 / 03期
关键词：
acid corrosion; pyrimidine derivatives; stainless steel; inhibition; MILD-STEEL; SULFURIC-ACID; DERIVATIVES; BEHAVIOR; 304-STAINLESS-STEEL; ADSORPTION; IRON; IONS;
D O I：
10.1002/maco.201005788
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The inhibition effect of two pyrimidine derivatives on the corrosion of austenitic stainless steel in 1?M HCl has been studied by Tafel plot, linear polarization, and electrochemical impedance spectroscopy (EIS) at 298?K. Results showed that compounds inhibited steel corrosion in a 1?M HCl solution and inhibition efficiencies increased with the concentration of inhibitor. Polarization curves indicated that all studied pyrimidine derivatives act as mixed type (cathodic/anodic) inhibitors. The adsorption of the inhibitors on the stainless steel surface was found to obey the Langmuir and DubininRadushkevich adsorption isotherm models. Negative values of ?Gads in the acidic media ensured the spontaneity of the adsorption process.
引用
收藏
页码：231 / 237
页数：7
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