EFFECT OF N-ALKYLBETAINES ON THE CORROSION OF IRON IN 1-M HCI SOLUTION

被引：94

作者：

HAJJAJI, N

RICO, I

SRHIRI, A

LATTES, A

SOUFIAOUI, M

BENBACHIR, A

机构：

[1] FAC SCI RABAT,DEPT CHEM,RABAT,MOROCCO

[2] UNIV TOULOUSE 3,IMRCP LAB,CNRS,UA 470,F-31062 TOULOUSE,FRANCE

来源：

CORROSION | 1993年 / 49卷 / 04期

关键词：

D O I：

10.5006/1.3316057

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using potentiodynamic and transient electrochemical methods and weight loss shows that N-alkylbetaines are good inhibitors of iron corrosion in HCl at concentrations around the critical micelle concentration (CMC). High corrosion Inhibition is observed when medium pH value is lower than organic compound pKa. When the concentration is close to the CMC, the organic compounds operate on the anodic and cathodic process and a bimolecular layer is formed. The inhibiting effect is reduced with an increase of medium pH value. This is explained by the complexing of NaBr with the zwitterionic form of organic compounds.

引用

页码：326 / 334

页数：9