Matériaux & Techniques
Volume 82, Number 1-2, 1994
|Page(s)||65 - 68|
|Published online||13 April 2017|
Etude in-situ de la dégradation des tôles peintes à l’aide d’un capteur électrochimique
Electrochemical impedance measurements
1 IRSID, Saint Germain en Laye
2 Adresse permanente : Institut Suédois de la Corrosion Roslagsvagen, Stockholm, Suède
Many investigators have studied the atmospheric corrosion of polymer-coated metal by electrochemical impedance spectroscopy using an extraneous electrolyte. It is now possible to eliminate this electrolyte and to obtain impedance spectra in situ using a monitor. This monitor is made by depositing a gold layer which cover 10% of the surface of the painted metal. In this study, the monitor was used to follow the degradation of painted steel during an indoor accelerated test (Renault 3C) and during a cyclic laboratory test. Impedance spectra obtained using this sensor provided an insight into the processes occuring at the coating-substrate interface. The monitor is an efficient tool to study the atmospheric corrosion of polymer-coated metals.
© SIRPE 1994
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