Lateral variation of the native passive film on super duplex stainless steel resolved by synchrotron hard X-ray photoelectron emission microscopy


Langberg M., Zhang F., Granas E., Ornek C., Cheng J., Liu M., ...More

Corrosion Science, vol.174, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 174
  • Publication Date: 2020
  • Doi Number: 10.1016/j.corsci.2020.108841
  • Journal Name: Corrosion Science
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Chimica, Communication Abstracts, Compendex, Computer & Applied Sciences, Environment Index, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: duplex stainless steel, passive film, lateral variation, synchrotron technique, photoelectron emission spectroscopy, CORROSION BEHAVIOR, LEAN DUPLEX, IN-SITU, METALS, PHASES, OXIDE, XPS, STAINLESS-STEEL-2205, DISSOLUTION, MOLYBDENUM
  • Istanbul Technical University Affiliated: Yes

Abstract

© 2020 The AuthorsA native passive film on 25Cr-7Ni super duplex stainless steel was analyzed using synchrotron hard X-ray photoemission electron microscopy, focusing on variations between individual grains of ferrite and austenite phases. The film consists of an oxide inner layer and an oxyhydroxide outer layer, in total 2.3 nm thick. The Cr content is higher in the outer than the inner layer, ca. 80 % on average. The Cr content is higher on ferrite than austenite, whereas the thickness is rather uniform. The grain orientation has a small but detectable influence, ferrite (111) grains have a lower Cr content than other ferrite grains.