Protection of a microstructured molybdenum reactor from high temperature oxidation by electrochemical deposition coatings in molten salts

S.A. Kuznetsov, A.R. Dubrovskiy, S.V. Kuznetsova, E.V. Rebrov, M.J.M. Mies, M.H.J.M. Croon, de, J.C. Schouten

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

Abstract

To improve the corrosion resistance of molybdenum, different methods were applied in this study: electrodeposition of hafnium coatings, electrochemical synthesis of hafnium diboride, boronising, siliciding, and boronising of MoSi2. The oxidation resistance of the coatings was investigated by the weight change in an air—water (2.3 vol %) mixture at a temperature of 500°C for a period up to 700 h. The best results for coatings with a thickness around 5 jim were obtained by boronising of silicided molybdenum substrates (MoSi2/Mo). It was shown that a two-phase microstructure consisting of the MoSi2 matrix phase with 12—15 wt % of the MoB4 phase greatly improved the oxidation resistance of the molybdenum substrate. The weight gain improved the oxidation resistance of the molybdenum substrate. The weight gain observed was 6.5 x I 0~ mg . cm~2 . h-1
Original languageEnglish
Title of host publicationMolten Salts and Ionic Liquids
Subtitle of host publicationNever the Twain?
EditorsM. Gaune-Escard, K.R. Seddon
Place of PublicationHoboken, N.J.
PublisherWiley
Chapter15
Pages193-217
Number of pages25
ISBN (Print)978-0-471-77392-4
DOIs
Publication statusPublished - 2010

Keywords

  • Corrosion resistance
  • Electrochemical deposition coatings
  • High temperature oxidation
  • Microstructured molybdenum reactor
  • Molten salts

Fingerprint Dive into the research topics of 'Protection of a microstructured molybdenum reactor from high temperature oxidation by electrochemical deposition coatings in molten salts'. Together they form a unique fingerprint.

Cite this