Effect of Surface Wear on Corrosion Protection of Steel by CrN Coatings Sealed with Atomic Layer Deposition

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorLeppäniemi, Jarmoen_US
dc.contributor.authorSippola, Perttuen_US
dc.contributor.authorPeltonen, Anttien_US
dc.contributor.authorAromaa, Jari J.en_US
dc.contributor.authorLipsanen, Harrien_US
dc.contributor.authorKoskinen, Jarien_US
dc.contributor.departmentDepartment of Chemistry and Materials Scienceen
dc.contributor.departmentDepartment of Electronics and Nanoengineeringen
dc.contributor.departmentAalto Nanofaben
dc.contributor.departmentDepartment of Chemical and Metallurgical Engineeringen
dc.contributor.groupauthorPhysical Characteristics of Surfaces and Interfacesen
dc.contributor.groupauthorHarri Lipsanen Groupen
dc.date.accessioned2018-03-16T10:32:44Z
dc.date.available2018-03-16T10:32:44Z
dc.date.issued2018en_US
dc.description.abstractCorrosion protection of steel obtained with physical vapor deposition (PVD) coatings can be further improved by sealing the intrinsic pinholes with atomic layer deposition (ALD) coatings. In this work, the effect of surface wear on corrosion protection obtained by a hybrid PVD CrN/ALD Al2O3/TiO2 nanolaminate coating was studied. The samples were investigated by alternating surface wear steps and exposure to salt solution and consecutively the progression of corrosion after each wear and each corrosion step was evaluated. Optical microscopy, scanning electron microscopy (SEM), and energy-dispersive spectroscopy showed that the rust spots were almost exclusively located on positions at which the wear steps had removed the top surface of the PVD CrN coating. Nevertheless, even after complete removal of the ALD nanolaminate from the top of the CrN surface by sandpaper grinding, the corrosion current density was less than half compared to the PVD CrN coating alone without surface wear. Cross-sectional SEM images obtained with focused ion beam milling showed not only the presence of the ALD coating at the CrN defects but also the opening of new pathways for the corrosion to attack the substrate. A mechanism for the effect of wear on the structure and corrosion protection of hybrid PVD/ALD coatings is proposed on the basis of this investigation.en
dc.description.versionPeer revieweden
dc.format.extent10
dc.format.extent1791-1800
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationLeppäniemi, J, Sippola, P, Peltonen, A, Aromaa, J J, Lipsanen, H & Koskinen, J 2018, ' Effect of Surface Wear on Corrosion Protection of Steel by CrN Coatings Sealed with Atomic Layer Deposition ', ACS Omega, vol. 3, no. 2, pp. 1791-1800 . https://doi.org/10.1021/acsomega.7b01382en
dc.identifier.doi10.1021/acsomega.7b01382en_US
dc.identifier.issn2470-1343
dc.identifier.otherPURE UUID: 7741580a-76eb-4dc8-910f-e6e5c076d7d4en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/7741580a-76eb-4dc8-910f-e6e5c076d7d4en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85042001498&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/18164462/acsomega.7b01382.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/30278
dc.identifier.urnURN:NBN:fi:aalto-201803161748
dc.language.isoenen
dc.relation.ispartofseriesACS Omegaen
dc.relation.ispartofseriesVolume 3, issue 2en
dc.rightsopenAccessen
dc.titleEffect of Surface Wear on Corrosion Protection of Steel by CrN Coatings Sealed with Atomic Layer Depositionen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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