Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33274
Title: Effect of laser formed AlN/Al2O3 films on corrosion behaviour of aluminium alloy 6013
Authors: Xu, WL
Yue, TM 
Man, HC 
Keywords: Aluminium alloy
Corrosion
Laser surface melting
Issue Date: 2007
Source: Surface engineering, 2007, v. 23, no. 4, p. 284-290 How to cite?
Journal: Surface Engineering 
Abstract: Excimer laser surface melting (LSM) was conducted on aluminium alloy 6013 with the aim of ascertaining the significance of the laser formed nitride/oxide film in providing a corrosion barrier to the alloy. Laser surface melting was performed under two different gas environments, nitrogen and air. After the laser treatment, a compact AlN and Al2O3 mixed film was formed at the top surface of the N2treated specimens, while only Al2O3 phase was found in the film of the air treated specimens. The laser formed film of some specimens was removed using ion etching, and their corrosion behaviour was studied. The potentiodynamic polarisation measurements showed that without ion etching, the corrosion current densities of the N2 treated and the air treated specimens were three orders and one order of magnitude respectively, lower than that of the untreated parent alloy. After ion etching, the corrosion current densities of the laser treated specimens were considerably increased. The time dependence of the polarisation resistances of the ion etched and unetched specimens was also determined. Equivalent circuits were presented to describe the corrosion behaviour of the various laser treated and untreated specimens.
URI: http://hdl.handle.net/10397/33274
ISSN: 0267-0844
DOI: 10.1179/174329407X215258
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