Silicon oxide coatings as protection against corrosion

T. Shikama, Y. Sakai, M. Okada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Silicon oxide films (SiOx(0≲x≲2)) were deposited onto Inconel 617 alloy for the purpose of corrosion protection in an impure helium environment. The protective behaviour of the deposited films was examined as a function of their chemical composition. The hypostoichiometric SiOx (x < 2) coatings showed poor protective effects. Rather, they enhanced carburization of the Inconel 617 substrate. This is because the interdiffusion of silicon and nickel is faster than the oxidation of SiOx to form protective SiO2. In the helium environment used, the rate of supply of oxygen was quite low. Stoichiometric SiO2 coatings, however, showed good protective qualities. They protected the Inconel 617 substrate from carburization and from selective oxidation at 1170 and 1270 K for 200 h. However, some deterioration in the protective effect is expected for longer exposure to this environment at 1270 K.

Original languageEnglish
Pages (from-to)89-97
Number of pages9
JournalThin Solid Films
Volume145
Issue number1
DOIs
Publication statusPublished - 1986 Dec 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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