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Corrosion des aciers revetus de zinc dans les zones confinées des carrosseries automobiles

Bruno Lefevre
Abstract : Corrosion patterns in automotive bodies can be classified into two categories: cosmetic corrosion and perforation corrosion. Cosmetic corrosion affects the outside appearance whereas perforation corrosion occurs in confined areas, (e.g. lap joints) in the presence of trapped water in holes. The severity of this type of corrosion is evidenced by perforation of body panels and chassis components. The aim of this study is a better understanding of perforation corrosion mechanisms. A corrosion cell has been developed to reproduce in laboratory the corrosion conditions, and to enable local pH measurements. The drying process of lap joints and the growth of corrosion products were monitored by video recording during climatic chamber tests; surfaces were characterised by XPS, IRRAS and SEM. A reaction chamber, interfaced with a PM-IRRAS spectrometer, was developed in order to follow in situ the kinetic of formation of corrosion products under wet conditions.
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Contributor : Ecole Chimie Paristech <>
Submitted on : Friday, April 20, 2007 - 8:00:00 AM
Last modification on : Friday, April 20, 2007 - 8:00:00 AM
Long-term archiving on: : Thursday, September 30, 2010 - 8:17:36 PM

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  • HAL Id : pastel-00002339, version 1

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Bruno Lefevre. Corrosion des aciers revetus de zinc dans les zones confinées des carrosseries automobiles. Chemical Sciences. Chimie ParisTech, 2004. English. ⟨pastel-00002339⟩

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