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The effect of the substrate surface state on the morphology, topography and tribocorrosion behavior of Si/Zr sol-gel coated 316L stainless steel

Abstract : In the present work, a Si/Zr based sol–gel (SG) coating was deposited on 316L stainless steel plates, previously treated by passivation (SSO) or electropolishing (SSEP) producing two different surface states. The SG coatings were compared for SSO and SSEP substrates in terms of morphology, topography and tribocorrosion response. The coating topography revealed a smoother surface for the Si/Zr-SSEP system. The coating deposited on the smoothest surface (Si/Zr-SSEP) presented half of the thickness of the one deposited on the roughest surface (Si/Zr-SSO). Tribocorrosion behavior was studied under potentiostatic control at anodic potential with a continuous recording of current (I) during sliding (pin-on-disc and alumina ball counterbody). Both SG systems showed an increase of current upon 100 sliding contact cycles indicating corrosion activity. After tribocorrosion tests, both systems revealed scratches, typical of abrasion, and coating removal in the wear tracks; the alumina counterparts presented accumulation of wear particles adhered to their surfaces. In conclusion, the initial surface state of the substrate modified the coating thickness, topography but did not significantly alter the tribocorrosion response of the studied SG systems.
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https://hal.univ-lille.fr/hal-03027909
Contributeur : Lilloa Université de Lille <>
Soumis le : vendredi 27 novembre 2020 - 12:56:48
Dernière modification le : vendredi 3 septembre 2021 - 09:22:07

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Stephania Kossman, Leonardo Bertolucci Coelho, Alex Montagne, Alberto Mejias, Adrien van Gorp, et al.. The effect of the substrate surface state on the morphology, topography and tribocorrosion behavior of Si/Zr sol-gel coated 316L stainless steel. Surface and Coatings Technology, Elsevier, 2020, Surface and Coatings Technology, pp.126666. ⟨10.1016/j.surfcoat.2020.126666⟩. ⟨hal-03027909⟩

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