Skip to Main content Skip to Navigation
Journal articles

Etude en laboratoire du comportement d'un revêtement duplex (zinc + peinture) utilisé pour la protection d structures enterrées en matériaux ferreux peu alliés

Abstract : in order to analyze the effect of a mechanical deterioration on the protective effect of a duplex coating, a groove exposing the substrate is achieved on a circular sample. The studied duplex coating is constituted of a hot sprayed zinc layer (about 50 µm ) and of a bituminous painting layer (about 100 µm). The behaviour to the corrosion of this coating is studied in a solution of NaCl 6g.L-1. The mechanism of self-healing of the groove by the zinc corrosion products is analyzed with the help of following experimental techniques: free potential measurements, electrochemical impedance spectroscopy (EIS), surface analysis: scanning electron microscopy (SEM) and Raman spectroscopy (RS). These methods give further results: the electrochemical methods show the effect of the galvanic protection (zinc) and the influence of the paint slowing down the penetration of the electrolyte; consequently, this controls the process of corrosion (physical barrier and electrical resistance). The formation of the zinc corrosion products is studied by EIS and observations with the MEB. Then the products are characterized by RS.
Document type :
Journal articles
Complete list of metadatas

https://hal-centralesupelec.archives-ouvertes.fr/hal-01252533
Contributor : Catherine Kruch <>
Submitted on : Thursday, January 7, 2016 - 4:28:19 PM
Last modification on : Wednesday, July 1, 2020 - 4:30:04 PM

Links full text

Identifiers

Collections

Citation

Y. Gourbeyre, L. Rytirova, Catherine Dagbert, J. Galland, L. Hyspecká. Etude en laboratoire du comportement d'un revêtement duplex (zinc + peinture) utilisé pour la protection d structures enterrées en matériaux ferreux peu alliés. Matériaux & Techniques, EDP Sciences, 2003, 91 (3-4), pp.41-47. ⟨10.1051/mattech/200391030041⟩. ⟨hal-01252533⟩

Share

Metrics

Record views

213