Thermal stability of the CoWO4 layer formed on ferritic stainless steel

Lu Gan, Toshiyuki Nishimura, Saad Ahmed Sheikh, Isao Saeki, Hideyuki Murakami

Research output: Contribution to journalArticlepeer-review

Abstract

This study focuses on the temperature capability of CoWO4 as the oxidation protection layer of ferritic stainless steel (FSS). The thermogravimetric-differential thermal analysis revealed that until CoWO4 started to melt at 1297 °C, little mass change was observed. In addition, the coefficient of thermal expansion of CoWO4 was 11.5 ± 0.2 (×10−6 K−1), which was similar to that of FSS, evidencing its good thermal stability and compatibility for the protection of FSS. The oxidation test of the Co–W coated specimens at 700 °C – 1000 °C in air confirmed effectiveness of the CoWO4 layer at T ≤ 850 °C.

Original languageEnglish
Article number109037
JournalCorrosion Science
Volume176
DOIs
Publication statusPublished - 2020 Nov

Keywords

  • Oxidation
  • Oxide coatings
  • SEM
  • Stainless steel

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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