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Journal Articles Corrosion Science Year : 1993

Laser depassivation of a channel flow double-electrode: A new technique in repassivation studies

Abstract

A powerful tool for distinguishing between the different electrochemical steps involved during a depassivation-repassivation sequence was developed by combining the pulsed laser depassivation technique with an hydrodynamic electrochemical method: the channel flow double-electrode (CFDE). This experiment consisted of transporting the chemical species (Fe2+) released by a depassivated iron electrode to a collecting electrode where these species were oxidized. A qualitative idea of the relative contribution of the anodic dissolution to the repassivation behavior was obtained. For a passive iron in acidic solution it was found that about 15% of the total charge is related to anodic dissolution.

Dates and versions

hal-04523038 , version 1 (27-03-2024)

Identifiers

Cite

R. Oltra, G.M. Indrianjafy, Michel Keddam, Hisasi Takenouti. Laser depassivation of a channel flow double-electrode: A new technique in repassivation studies. Corrosion Science, 1993, 35 (1-4), pp.827-832. ⟨10.1016/0010-938X(93)90221-2⟩. ⟨hal-04523038⟩
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