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Corrosion behavior of additively manufactured AISI 316L stainless steel under atmospheric conditions
RISE Research Institutes of Sweden, Materials and Production, Corrosion. (Institut de la Corrosion)ORCID iD: 0000-0002-5872-8649
University of Brest, France.
RISE Research Institutes of Sweden, Materials and Production, Corrosion. (Institut de la Corrosion)ORCID iD: 0000-0002-1753-9972
RISE Research Institutes of Sweden, Materials and Production, Corrosion.ORCID iD: 0000-0001-5462-2700
2022 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, Vol. 73, no 11, p. 1833-Article in journal (Refereed) Published
Abstract [en]

This study investigated the corrosion behavior of AISI 316L produced by direct energy deposition (DED). Microstructural and chemical analysis showed a homogeneous distribution of Si and Si–Mn inclusions of 0.5–1 µm and the Cr and Mo enrichment within interdendritic areas. Scanning Kelvin probe analysis of additively manufactured stainless steel highlighted a regular “striped-like” surface potential feature with a potential gradient of 30 mV for a mean value of 0.320 ± 0.017 V versus standard hydrogen electrode. It can be related to the presence of the residual stress in the oxide film and the complex thermal history due to the fabrication process. A cyclic corrosion test simulating atmospheric conditions revealed the same corrosion properties for stainless steel fabricated by DED compared to cold rolled one. Various surface preparations of 316L were also exposed for corrosion tests. It was found that the “as-received” and “brushed” surfaces exhibited poorer corrosion resistance due to the presence of an as-build defective layer. However, prior passivation of brushed surface, machining, or mechanical grinding down to P1200 improve significantly the corrosion resistance. © 2022 French Corrosion Institute part of RISE Research Institutes of Sweden. Materials and Corrosion published by Wiley-VCH GmbH.

Place, publisher, year, edition, pages
John Wiley and Sons Inc , 2022. Vol. 73, no 11, p. 1833-
Keywords [en]
AISI 316, corrosion tests, direct energy deposition, scanning Kelvin Probe, XPS analysis, Additives, Atmospheric chemistry, Austenitic stainless steel, Chemical analysis, Cold rolling, Corrosive effects, Metal cladding, Oxide films, Probes, Steel corrosion, X ray photoelectron spectroscopy, 316 L stainless steel, 316L, Atmospheric conditions, Corrosion behaviour, Energy depositions, Scanning Kelvin probes, Corrosion resistance
National Category
Corrosion Engineering
Identifiers
URN: urn:nbn:se:ri:diva-59862DOI: 10.1002/maco.202213339Scopus ID: 2-s2.0-85133870217OAI: oai:DiVA.org:ri-59862DiVA, id: diva2:1685178
Note

Correspondence Address: Helbert, V.; Institut de la Corrosion/French Corrosion Institute, France; email: varvara.helbert@institut-corrosion.fr

Available from: 2022-08-02 Created: 2022-08-02 Last updated: 2024-02-06Bibliographically approved

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Helbert, VarvaraLe Bozec, NathalieThierry, Dominique

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