Impedance characterization of the electrochemical environment under a polymer film artificially delaminated - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Electrochimica Acta Année : 2008

Impedance characterization of the electrochemical environment under a polymer film artificially delaminated

Anne Rubin
  • Fonction : Auteur
  • PersonId : 901890
R. Oltra
  • Fonction : Auteur
  • PersonId : 831776
K. Ogle
  • Fonction : Auteur

Résumé

Knowledge of the electrical conductivity of the zone under a delaminated paint film is one necessary input parameter for the simulation of electrochemically driven underpaint corrosion. In this work, a microelectrode array system has been developed, tested, and applied to measure the spatial distribution of resistivity in the delaminated zone along the metal/polymer interface. The experimental device consists of a linear array of six 100 m diameter stainless steel microelectrodes (100 m in diameter) embedded in a steel substrate. A polymer coatingwas applied and an artificial "delaminated zone"was created using the laser-induced decohesion technique. The electrochemical impedancewas measured between the first uncovered electrode and the electrodes at progressively increasing distances in the artificial delaminated zone. A steady decrease in the impedance with time can be observed, probably due to the continued ingress of electrolyte and a variation of the gap width.

Domaines

Matériaux
Fichier non déposé

Dates et versions

hal-00630243 , version 1 (07-10-2011)

Identifiants

  • HAL Id : hal-00630243 , version 1

Citer

Anne Rubin, R. Oltra, B. Vuillemin, K. Ogle. Impedance characterization of the electrochemical environment under a polymer film artificially delaminated. Electrochimica Acta, 2008, 53 (22), pp.6484. ⟨hal-00630243⟩
35 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More