Synergistic effect on corrosion inhibition by cerium(IV) ion and sodium molybdate for cold rolled steel in hydrochloric acid solution

被引：0

作者：

Mu, GN ^{[1
]}

Li, XH ^{[1
]}

Qu, Q ^{[1
]}

Zhou, J ^{[1
]}

机构：

[1] Yunnan Univ, Dept Chem, Kunming 650091, Peoples R China

来源：

ACTA CHIMICA SINICA | 2004年 / 62卷 / 24期

关键词：

hydrochloric acid; cold rolled steel; sodium molybdate; Ce4+; sodium sulfate; synergism;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The synergistic effect on inhibition by cerium(W) ion and sodium molybdate for cold rolled steel (CRS) in hydrochloric acid solution was investigated by weight-loss and electrochemistry methods. The results showed that both sodium molybdate and cerium (IV) had inhibitive effect on CRS corrosion, but the maximum inhibition efficiencies were not more than 42%. From the discussion of adsorption model, the experimental results were discussed more reasonably in the light of amended formula, which was amended based on Langmuir adsorption isothermal equation. Three adsorption parameters (DeltaH(Theta), DeltaG(Theta), DeltaS(Theta)) were also calculated. Through the experiments of comparison, it was found that cerium(IV) ion with sodium molybdate produced strong synergistic effect on corrosion inhibition for CRS, and the maximum inhibition efficiency was about 90%.

引用

页码：2386 / 2390

页数：5

共 25 条

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