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Search: id:"swepub:oai:DiVA.org:kth-328775" > Understanding passi...

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  • Oernek, CemIstanbul Tech Univ, Dept Met & Mat Engn, Istanbul, Turkiye.;Leibniz Inst Mat Res, Dept Surface Sci & Engn, Bremen, Germany.,Istanbul Technical University (author)

Understanding passive film degradation and its effect on hydrogen embrittlement of super duplex stainless steel-Synchrotron X-ray and electrochemical measurements combined with CalPhaD and ab-initio computational studies

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • Elsevier BV,2023
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:kth-328775
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-328775URI
  • https://doi.org/10.1016/j.apsusc.2023.157364DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-60886URI
  • https://lup.lub.lu.se/record/eb8fe264-2028-4b2a-9e32-7fae18b0200cURI

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  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • QC 20230613
  • The passive film stability on stainless steel can be affected by hydrogen absorption and lead to microstructure embrittlement. This work shows that the absorption of hydrogen results in surface degradation due to oxide reduction and ionic defect generation within the passive film, which decomposes and eventually vanishes. The passive film provides a barrier to entering hydrogen, but when hydrogen is formed, atomic hydrogen infuses into the lattices of the austenite and ferrite phases, causing strain evolution, as shown by synchrotron x-ray diffraction data. The vacancy concentration and hence the strains increase with increasing electrochemical cathodic po-larization. Under cathodic polarization, the surface oxides are thermodynamically unstable, but the complete reduction is kinetically restrained. As a result, surface oxides remain present under excessive cathodic polari-zation, contesting the classical assumption that oxides are easily removed. Density-functional theory calculations have shown that the degradation of the passive film is a reduction sequence of iron and chromium oxide, which causes thinning and change of the semiconductor properties of the passive film from n-type to p-type. As a result, the surface loses its passivity after long cathodic polarization and becomes only a weak barrier to hydrogen absorption and hence hydrogen embrittlement.

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  • Zhang, FanUniv Sussex, Dept Engn & Design, Brighton, England.,University of Sussex (author)
  • Larsson, AlfredLund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,LTH profilområde: Nanovetenskap och halvledarteknologi,LTH profilområden,LU profilområde: Ljus och material,Lunds universitets profilområden,Other operations, LTH,Faculty of Engineering, LTH,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Nanoscience and Semiconductor Technology,LTH Profile areas,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas(Swepub:lu)al4744la (author)
  • Mansoor, MubashirIstanbul Tech Univ, Dept Met & Mat Engn, Istanbul, Turkiye.,Istanbul Technical University (author)
  • Harlow, Gary S.Malmö University,Malmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM),Malmö Univ, Mat Sci & Appl Math, Malmö, Sweden.(Swepub:lu)ga4457ha (author)
  • Kroll, RobinUniv Manchester, Dept Mat, Manchester, England.,University of Manchester (author)
  • Carla, FrancescoDiamond Light Source, Didcot, England. (author)
  • Hussain, HadeelDiamond Light Source, Didcot, England. (author)
  • Engelberg, Dirk L.Univ Manchester, Dept Mat, Manchester, England.,University of Manchester (author)
  • Derin, BoraIstanbul Tech Univ, Dept Met & Mat Engn, Istanbul, Turkiye.,Istanbul Technical University (author)
  • Pan, Jinshan,1962-KTH Royal Institute of Technology,KTH,Yt- och korrosionsvetenskap,KTH Royal Inst Technol, Div Surface & Corros Sci, Stockholm, Sweden.(Swepub:kth)u17ks6cf (author)
  • Istanbul Tech Univ, Dept Met & Mat Engn, Istanbul, Turkiye.;Leibniz Inst Mat Res, Dept Surface Sci & Engn, Bremen, Germany.Istanbul Technical University (creator_code:org_t)

Related titles

  • In:Applied Surface Science: Elsevier BV6280169-43321873-5584

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