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Combined XPS / TEM study of the chemical composition and structure of the passive film formed on additive manufactured 17-4PH stainless steel

Abstract : he structure and chemical composition of the passive film formed on 17-4PH martensitic stainless steel (MSS) manufactured by powder bed laser beam melting (LBM) were investigated combining XPS and TEM analyses, by comparison to a conventional l 7-4PH. The structure of the passive film was found similar for both MSSs, with, on the matrix, a duplex layer composed of Fe and Cr oxy-hydroxide followed by an intermediate layer enriched in metallic compounds. A particular Nb oxide film formed on the NbC precipitates merging to the surface for both MSSs. Significant differences in thickness and Cr distribution were observed between both MSSs.
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https://hal.archives-ouvertes.fr/hal-03111555
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Friday, January 15, 2021 - 1:37:56 PM
Last modification on : Tuesday, January 19, 2021 - 3:22:04 AM
Long-term archiving on: : Friday, April 16, 2021 - 6:37:43 PM

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Adrien Barroux, Thomas Duguet, Nadège Ducommun, Eric Nivet, Julien Delgado, et al.. Combined XPS / TEM study of the chemical composition and structure of the passive film formed on additive manufactured 17-4PH stainless steel. Surfaces and Interfaces, Elsevier, 2021, 22, pp.100874. ⟨10.1016/j.surfin.2020.100874⟩. ⟨hal-03111555⟩

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