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Journal of Applied Sciences

Year: 2006 | Volume: 6 | Issue: 11 | Page No.: 2491-2495
DOI: 10.3923/jas.2006.2491.2495
Electrochemical Study of Aluminium Alloy AA 5083 Corrosion Induced by Elemental Mercury in LNG Industries
D. Zerouali, Z. Derriche and M.Y. Azri

Abstract: Electrochemical corrosion studies of industrial Aluminium alloy AA 5083 corrosion in natural gas containing mercury metal and water as impurities showed to be a complex process. Single scan voltamograms of amalgamated electrode presents peaks of electrochemical oxidation around E = -1.4 volt/SCE and a corrosion potential Ecor = -1.6 volt/SCE showing an active amalgamated surface. Oxydation peak, Ip relating rate of electrochemical oxidation of aluminium was depending on three factors: thickness of amalgam and diffusivity of aluminium in amalgam, rate of chemical dissolution of aluminium in mercury which is the limiting step at high scanning rate potential and low immersion time. Diffusional step which controls kinetics at highest immersion time and lowest scanning rate and an intermediate step which controlled by the two kinetics.

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How to cite this article
D. Zerouali, Z. Derriche and M.Y. Azri, 2006. Electrochemical Study of Aluminium Alloy AA 5083 Corrosion Induced by Elemental Mercury in LNG Industries. Journal of Applied Sciences, 6: 2491-2495.

Keywords: Corrosion, aluminium alloy, mercury, amalgam and natural gas

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