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A study of the mechanisms of corrosion inhibition of AA2024-T3 by vanadates using the split cell technique

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/44537

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Title: A study of the mechanisms of corrosion inhibition of AA2024-T3 by vanadates using the split cell technique
Creators: Iannuzzi, M.; Frankel, G. S.; Kovac, J.
Keywords: corrosion inhibition
AA2024-T3
split cell technique
vanadates
Issue Date: 2007
Citation: Iannuzzi, M.; Frankel, G. S.; Kovac, J. "A study of the mechanisms of corrosion inhibition of AA2024-T3 by vanadates using the split cell technique," Electrochimica Acta, v. 52, no. 12, 2007, pp. 4032-4042.
Abstract: The mechanisms of corrosion inhibition of AA2024-T3 by vanadates were studied in this work using the split cell technique and polarization curves. The electrochemical behavior of clear solutions containing metavanadates and orange solutions containing decavanadates was clearly distinctive. Injection of metavanadates to the cathode side of the different split cell setups greatly reduced the galvanic current, indicating a potent inhibition of the oxygen reduction kinetics. The galvanic current never exhibited a transient current peak, suggesting that metavanadates inhibit AA2024-T3 corrosion by a mechanism that does not involve electrochemical reduction. Injection of metavanadate to the anode side of the different split cells had no effect on the galvanic current. Injection of orange decavanadate to the cathode side of the AA2024-T3 split cell resulted in a large current peak, associated with the electrochemical reduction of decavanadate. However, decavanadates did not impart significant corrosion protection.
URI: http://hdl.handle.net/1811/44537
ISSN: 0013-4686 (print)
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