Effect of alloyed Al on the corrosion behaviour of Ni-base alloys in molten glass under static condition

Yaxin Xu, Jingbo Yan, Fei Sun, Yuefeng Gu

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Ni-base alloys with different Al contents of 0–10 wt.% were designed and the corrosion behaviour was evaluated by static immersion in molten glass at 1050 °C. Results indicate that a small amount of Al (2–5 wt.%) is advantageous to mitigate the corrosion of the commercial Ni-base alloy, whereas further increase of Al content (8–10 wt.%) accelerates the corrosion process. In Al-added alloys, the corrosion of Cr element is suppressed by the Al dissolution, and the formation of inner alumina in high Al alloys leads to the surface exfoliation. The corrosion mechanism strongly depends on the Al content in alloys.

Original languageEnglish
Pages (from-to)635-646
Number of pages12
JournalCorrosion Science
Volume112
DOIs
Publication statusPublished - 2016 Nov 1
Externally publishedYes

Keywords

  • A. Glass
  • A. Superalloys
  • B. EPMA
  • B. SEM
  • B. XRD
  • C. High-temperature corrosion

ASJC Scopus subject areas

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

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