Influence des conditions de mise en œuvre sur les propriétés de revêtements protecteurs: Application à la corrosion sur acier

Abstract : Paints are conventionally used in the field of marine renewable energies to protect steel structures from corrosion. To improve the adhesion and therefore the durability of these coatings, surface treatments can be used. Usually, this is done by sandblasting. In this study innovative surface treatments were tested. The sol-gel and PVD technologies have shown good adhesion and durability properties in humid environments, making them attractive candidates for replacing the sandblasting step which mechanically weakens the paint system. In addition, an industrialization of these methods requires a perfect control of the processes. This is why the influence of the monitoring conditions on the sol-gel and PVD processes was studied. The sol-gel transition kinetics is affected by temperature and relative humidity which modify the properties of the gel formed. T and RH must therefore be measured to adjust the drying time. The growth of the PVD coating results in the formation of residual stresses that can be evaluated by a method detailed in this report. The study of these phenomena made it possible to make suggestions in view of improving the effectiveness of the coating. For example, the level and the sign of stresses can be modified by adjusting the thickness and bias voltage. Finally, many physicochemical characterization tests were used and the results obtained could be compared, that made it possible to evaluate the relevance of the various tests.
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-02136740
Contributor : Quentin Hatte <>
Submitted on : Wednesday, May 22, 2019 - 12:38:17 PM
Last modification on : Thursday, May 23, 2019 - 1:27:42 AM

File

Manuscrit.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-02136740, version 1

Collections

Citation

Quentin Hatte. Influence des conditions de mise en œuvre sur les propriétés de revêtements protecteurs: Application à la corrosion sur acier. Matériaux. Université de Nantes, 2019. Français. ⟨tel-02136740⟩

Share

Metrics

Record views

121

Files downloads

188