Corrosion investigation and evaluation of mechanical and structural properties of powder coatings

Abstract

Purpose

The purpose of this paper is to deal with the study of properties of anticorrosion powder based coatings on aluminium alloy 2024.

Design/methodology/approach

The powder based coatings were applied to the AA2024 substrates using a spray coating technique. All the substrates were covered with a primer prior the powder based coatings. The morphology and composition of the coatings was examined by scanning electron microscopy and energy dispersive X-ray analysis, respectively. Studies on the corrosion resistance of these coatings were made using electrochemical impedance spectroscopy.

Findings

The results reveal that the powder based coatings together with the primer coatings demonstrate improved corrosion protection to AA2024 after exposure to corrosive environment. Moreover, the primer coating is mechanically enhanced compared to the top coating, while the top coating exhibited significant resistance to wear.

Originality/value

The paper deals with the evaluation of corrosion and nanomechanical properties of coatings applied on aluminium alloy.

Citation

Koumoulos, E.P., Kartsonakis, I.A., Vlachakis, G., Vlachakis, M. and Charitidis, C.A. (2016), "Corrosion investigation and evaluation of mechanical and structural properties of powder coatings", International Journal of Structural Integrity, Vol. 7 No. 1, pp. 2-24. https://doi.org/10.1108/IJSI-11-2013-0040