Corrosion protection performance of novel hybrid polyaniline/sol-gel coatings on an aluminium 2024 alloy in neutral, alkaline and acidic solutions

被引：72

作者：

Akid, R. ^{[1
]}

Gobara, M. ^{[1
]}

Wang, H. ^{[1
]}

机构：

[1] Sheffield Hallam Univ, Mat & Engn Res Inst, Sheffield S1 1WB, S Yorkshire, England

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 05期

关键词：

Sol-gel; Polyaniline; Conducting polymer; Self-healing; Chromate replacement; Aerospace alloys; MILD-STEEL; CONDUCTING POLYMERS; STAINLESS-STEEL; IRON; ELECTROSYNTHESIS; SPECTROSCOPY; INHIBITION; COPPER; FILMS;

D O I：

10.1016/j.electacta.2010.12.032

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this study the corrosion performance of a novel coating, consisting of a combination of silica sol-gel and conductive polymer, in 3.5% NaCl at different pH levels is presented. Electrochemical Impedance Spectroscopy showed the impedance of the coating remained stable for up to 24 months in neutral 3.5% NaCl solution. No corrosion or delamination was observed after 500 h in salt spray tests and Scanning Vibrating Electrode Technique tests showed the coating exhibited a "self healing" property. The surface morphology was characterised by Scanning Electron Microscopy and the mechanical properties, notably adhesion, were studied using pull off and cross cut techniques. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2483 / 2492

页数：10

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