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Durabilité d'assemblages métal/élastomère en milieu marin

Abstract : In some industrial applications, bonding rubber coatings to metallic pipelines is a suitable solution to protect them from marine corrosion. This study deals with the long term behavior of such metallic coated pipelines in a marine environment. Two different approaches have been developed. The first focuses on degradation data of pipelines used for around thirty years in normal service conditions. As these bonded assemblies are different in terms of material formulations, manufacturing processes and aging conditions, statistical tools were used to identify homogeneous groups with identical aging mechanisms. Also, based on these results, the main degradation mechanisms of the rubber coating were established. The second approach focused on pipelines used currently in renovation operations. An experimental methodology was developed in the laboratory to accelerate aging processes. The bulk materials, surfaces and interfaces were characterized physically, chemically and mechanically before and after natural sea water ageing. This enabled an understanding of the mechanisms and kinetics governing adhesion and degradation to be developed. It also allowed the influence of sea water aging on the failure strength of the assembly of interest to be investigated.
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Submitted on : Friday, April 13, 2018 - 4:01:06 PM
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  • HAL Id : tel-01766445, version 1

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Tatiana Siwavi Tchalla. Durabilité d'assemblages métal/élastomère en milieu marin. Génie mécanique [physics.class-ph]. Université de Bretagne occidentale - Brest, 2017. Français. ⟨NNT : 2017BRES0121⟩. ⟨tel-01766445⟩

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