The corrosion behavior of Ni-Ta-5P alloys in concentrated hydrochloric acid

Ho Jin Lee, Eiji Akiyama, Hiroki Habazaki, Asahi Kawashima, Katsuhiko Asami, Koji Hashimoto

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The addition of 30 at% or more tantalum to Ni-5P alloy greatly enhances the corrosion resistance in 12 M HC1 at 30°G The corrosion rate of amorphous Ni-40Ta-5P alloy is about three orders of magnitude lower than that of Ni-5P alloy. The addition of sufficient amounts of tantalum to Ni-SP alloys leads to an ennoblement of the open circuit potential and to spontaneous passivation. The addition of a large amount of tantalum to the Ni-Ta alloy contained a small amount of phosphorus, such as 5 at%, enhances the formation of the tantalum enriched passive film which prevents oxidation of phosphorus.

Original languageEnglish
Pages (from-to)383-388
Number of pages6
Journalmaterials transactions, jim
Issue number3
Publication statusPublished - 1996


  • 12 MHC1
  • Amorplious
  • Corrosion product film
  • Corrosion resistance
  • Immersion
  • Ni-ta-p alloys
  • Open circuit potential
  • Passivation
  • XPS


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