Corrosion Inhibition of AA2024-T3 by Vanadates

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fac_FrankelG_ECSTransactions_2007_3_31.pdf (1.52 MB)

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2006

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The Electrochemical Society

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The speciation of vanadate solutions and the resultinginhibition of oxygen reduction and corrosion of AA2024-T3 wereinvestigated. 51V NMR is very useful for assessing vanadatespeciation. Clear metavanadate solutions contain nodecavanadate, which forms whenever the pH was decreased by theaddition of acid. Orange decavanadate solutions contain nomonovanadate, even when the pH is adjusted to high values.Monovanadate is a potent inhibitor in contrast to decavanadate. Inhibition by monovanadate seems to result from an adsorptionmechanism rather than reduction. Monovanadate effectivelyprotects S phase particles. Aging of high-pH decavanadatesolutions does not improve the inhibition performance or resultin complete depolymerization of the decavanadate.

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M. Iannuzzi and G. S. Frankel, "Corrosion Inhibition of AA2024-T3 by Vanadates," ECS Transactions 3, no. 31 (2007), doi:10.1149/1.2789221

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http://hdl.handle.net/1811/49203

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Ohio State University Research and Scholarship