On the inhibition of the carbon dioxide corrosion of steel by carboxylic acids

被引：22

作者：

Kuznetsov, YI ^{[1
]}

Ibatullin, KA ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Phys Chem, Moscow 117915, Russia

来源：

PROTECTION OF METALS | 2002年 / 38卷 / 05期

关键词：

Dioxide; Carbon Dioxide; Inorganic Chemistry; Carboxylic Acid; Vapor Phase;

D O I：

10.1023/A:1020342728236

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The inhibitive effects of aliphatic carboxylic acids on steel corrosion in the liquid and vapor phases of carbonate media were studied. It was shown that the acids become more effective with an increase in their hydrophobicity and can inhibit both the cathodic and anodic processes on steel because of their high adsorbabilities. Lauric acid was found to be the most effective inhibitor of carbon dioxide corrosion among the carboxylic acids studied. Although its molecule includes a relatively long alkyl fragment (C11H23), this acid is rather volatile and can be used as VCI. Caprylic acid in a concentration of 3.7 mmol/l inhibits steel dissolution in the temperature range from 30 to 100degreesC and increases the apparent energy of corrosion activation.

引用

页码：439 / 443

页数：5

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