Corrosion protection of stainless steel by separate polypyrrole electrode in acid solutions

被引：16

作者：

Hu, J. ^{[2
]}

Zhu, H. ^{[2
]}

Ma, Y. ^{[2
]}

Yi, T. ^{[2
]}

Mao, X. ^{[2
]}

Lin, A. ^{[2
]}

Gan, F. ^{[1
,2
]}

机构：

[1] State Key Labs Corros & Protect Met, Shenyang 110015, Peoples R China

[2] Wuhan Univ, Sch Resource & Environm Sci, Dept Environm Engn, Wuhan 430072, Peoples R China

来源：

MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2011年 / 62卷 / 01期

基金：

美国国家科学基金会;

关键词：

GALVANIC ANODIC PROTECTION; ORGANIC METAL POLYANILINE; COATED MILD-STEEL; CONDUCTING POLYMERS; DOPED POLYANILINE; FERROUS-METALS; CARBON-STEEL; COATINGS; IRON; PASSIVATION;

D O I：

10.1002/maco.200905344

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Galvanic anodic protection (GAP) of stainless steels by doped polypyrrole (PPy) was investigated using chemically synthesized PPy. Separate PPy powder-pressed electrodes with different surface areas were prepared. Electrochemical properties of PPy electrodes were studied by open circuit potentials (OCPs) and potentiostatic polarization. PPy powder-pressed electrodes were coupled with 410-stainless steel electrodes in different concentrations of sulfuric acid solutions, 5 M phosphoric acid solution, and industrial phosphoric acid solution (5 M phosphoric acid + 0.05% chloride ion). Remarkable shift of OCP to the positive direction and sharp decrease of corrosion rate were observed during the coupling experiments, which implies that 410-stainless steel was transferred to passive state. Results also showed that PPy electrode with sufficient surface area can provide corrosion protection to 410-stainless steel electrode in highly corrosive acid solution. Based on the experiment results, GAP provided by PPy and PANi (synthesized under similar conditions) was compared.

引用

页码：68 / 73

页数：6

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