The influence of pH on the corrosion of medium strength aerospace alloys 8090, 2091 and 2014

Ambat, Rajan and Dwarakadasa, ES (1992) The influence of pH on the corrosion of medium strength aerospace alloys 8090, 2091 and 2014. In: Corrosion Science, 33 (5). pp. 681-690.

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Abstract

The influence of pH on the corrosion behaviour of two aluminium-lithium-copper-magnesium-zirconium (8090 and 2091) alloys was studied and compared with a standard aircraft alloy, 2014 (Al-4.4% Cu) and 99.9% pure Al. In constant exposure and potentiodynamic polarization studies conducted in 3.5% NaCl solution having different pH values, all the alloys exhibited high corrosion rates in acidic and alkaline environments, with a minimum in less hostile environments close to neutral pH. The pitting potentials for aluminium-lithium alloys were slightly lower than those for 2014 and pure Al. The effect of pH on the passive current density was also less for aluminium-lithium alloys.

Item Type:	Journal Article
Publication:	Corrosion Science
Publisher:	Elsevier science
Additional Information:	Copyright of this article belongs to Elsevier science.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	30 May 2011 05:42
Last Modified:	30 May 2011 05:42
URI:	http://eprints.iisc.ac.in/id/eprint/37772

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