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

AKID, R., GOBARA, M. and WANG, H. (2011). Corrosion protection performance of novel hybrid polyaniline/sol–gel coatings on an aluminium 2024 alloy in neutral, alkaline and acidic solutions. Electrochimica Acta.

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Abstract

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.

Item Type:	Article
Research Institute, Centre or Group:	Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology
Identification Number:	10.1016/j.electacta.2010.12.032
Depositing User:	Ann Betterton
Date Deposited:	20 Jan 2011 10:12
Last Modified:	04 Apr 2011 15:33
URI:	http://shura.shu.ac.uk/id/eprint/2997

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