Corrosion inhibition of steel in sodium chloride solution by undoped polyaniline epoxy blend coating

被引：68

作者：

Akbarinezhad, E. ^{[1
,2
]}

Ebrahimi, M. ^{[2
]}

Faridi, H. R. ^{[1
]}

机构：

[1] RIPI, Corros Res Dept, Tehran, Iran

[2] Amir Kabir Univ Technol, Dept Polymer Engn, Tehran, Iran

来源：

PROGRESS IN ORGANIC COATINGS | 2009年 / 64卷 / 04期

关键词：

Undoped polyaniline; Epoxy; Corrosion inhibitor; Open circuit potential; Electrochemical impedance spectroscopy; MILD-STEEL; PROTECTION; POLYMERS; BEHAVIOR; METALS; FILMS; IRON; SALT;

D O I：

10.1016/j.porgcoat.2008.07.018

中图分类号：

O69 [应用化学];

学科分类号：

070301 [无机化学];

摘要：

in this study an undoped polyaniline (PAni) was synthesized by chemical oxidative polymerization with ammonium persulfate as an oxidizing reagent. The synthesized PAni was used as a corrosion inhibitive pigment in an epoxy matrix. The corrosion protection performance of steel coated panels in 3.5% sodium chloride solution was evaluated via determination of open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS). it was found that after 300 days of immersing the resistance of coating Was about 4 x 105 Omega cm(2). The OCP was shifted to the noble region due to the passivation effect of PAni pigment. Besides, the phase angle (theta) at 10 kHz was stable around 87 +/- 1 during immersion period. Results revealed that PAni pigmented paint showed acceptable protection against the corrosion of carbon steel in 3.5% sodium chloride solution. (C) 2008 Published by Elsevier B.V.

引用

页码：361 / 364

页数：4

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