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Title: Corrosion characteristics of some aluminium alloys in oxalic acid
Authors: Singh, M M
Gupta, Archana
Issue Date: Jan-1996
Publisher: NISCAIR-CSIR, India
Abstract: The corrosion behaviour of 1060 and 1100 aluminium alloys in different concentrations (0.1, 0.25, 0.5, 0.75, 1.0, 2.0 and 5.0%) of oxalic acid solutions has been investigated by weight loss and potentiostatic polarisation techniques, at 25°C. The data indicate that 1100 aluminium is less corrosion resistant than 1060 aluminium. The corrosion rates of these alloys are a function of the concentration of electrolyte in a narrow range of concentration, only. The anodic polarisation curves of both the alloys exhibit active behaviour at each concentration of oxalic acid and in the whole range of the applied potential. The cathodic polarisation curves are almost linear in both the cases, resembling that for hydrogen evolution reaction. The corrosion behaviour of aluminium alloys in oxalic acid has been explained in terms of the acidity of the solution and self inhibition due to the adsorption of oxalate ions.
Page(s): 32-36
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.03(1) [January 1996]

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