Anti-Corrosive property of Emeraldine Base Form of Polyaniline

J Chin Soc Corr Pro

2004, Vol. 24

Issue (5): 301-305 DOI:

Research Report

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Anti-Corrosive property of Emeraldine Base Form of Polyaniline

Li Xin

西安交通大学环境与化工工程学院

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Abstract Corrosion protection of cold-rolled steel(CRS) was investigated with dispersed emeraldine base(EB) form of polyaniline. EB was dispersed in deionized water or aqueous NaCl and then deposited on the surface of CRS. A compact oxide film was formed on the surface of treated CRS and proved by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy(SEM0, which shifted the corroson potential by 200mV in noble direction and significantly decreased the corrosion current density . It was attested that EB film alone could not offer effective corrosion protection for its bad stability, while EB dispersed in epoxy coating holds good its redox characteristic and provide excellent anti-corrosion property by passivating the CRS. The barrier effect of the epoxy coating was reduced with the incorporatin of EB particles, therefore a topcoat with good barrier performance was needed on the EB/epoxy coating (EBd/EP). It was exhibited that a good barrier topcoat remarkably enhanced EBd/EP's corrosion protection performance.

Key words: polyaniline corrosion cyclic voltammetry

Received: 01 April 2003

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TG17

Corresponding Authors: Li Xin

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Li Xin. Anti-Corrosive property of Emeraldine Base Form of Polyaniline. J Chin Soc Corr Pro, 2004, 24(5): 301-305 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2004/V24/I5/301

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