MARCHEBOIS, H; TOUZAIN, Sébastien; JOIRET, Suzanne; BERNARD, J.; SAVALL, C.

doi:10.1016/S0300-9440(02)00145-5

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MARCHEBOIS, H

TOUZAIN, Sébastien
Laboratoire des Sciences de l'Ingénieur pour l'Environnement - UMR 7356 [LaSIE]

JOIRET, Suzanne
Laboratoire Interfaces et Systèmes Electrochimiques [LISE]

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Progress in Organic Coatings. 2002-12, vol. 45, n° 4, p. 415-421

Elsevier

Résumé en anglais

The effect of addition of conductive pigments like carbon blacks on the corrosion behavior of zinc-rich powder paints coated steel in artificial sea water was investigated. Open circuit potential measurements were used to characterize the cathodic protection ability and duration. Micro-Raman spectroscopy analysis was performed in order to identify the corrosion products and to follow the penetration of the solution inside the coatings.Two different effects were pointed out: an increase of the porosity induced by carbon addition and a galvanic action between zinc and carbon pigments. The performance of the powder coatings, strongly improved if the carbon amount is sufficient, was compared to the one reported for solvent-based zinc-rich paints.< Réduire

Mots clés en anglais

Zinc-rich paint (ZRP); Powder coatings; Carbon blacks; Raman spectroscopy; Electrochemical measurements

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Zinc-rich powder coatings corrosion in sea water: influence of conductive pigments

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