The effect of alloying elements on the corrosion behaviour of sputter-deposited amorphous Mn-Ta-Cr alloys in 1 M H2SO4

A. A. El-Moneim, Eiji Akiyama, H. Habazaki, A. Kawashima, K. Asami, K. Hashimoto

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The effect alloying tantalum and chromium on the corrosion resistance of amorphous manganese-base alloys was studied by weight-loss, electrochemical and XPS techniques. Amorphous alloys were formed in a wide composition range by the addition of tantalum to manganese-chromium alloys. The corrosion rates of Mn-Ta-Cr alloys in 1 M H2SO4 open to air at 30°C were about four and six orders of magnitude lower than those of Mn-Ta and Mn-Cr alloys containing the same amount of manganese, respectively, and decreased with increasing alloy chromium content. Thus, additions of chromium and tantalum to manganese were synergistically effective in enhancing the corrosion resistance of Mn-Ta-Cr alloys. The beneficial effect of chromium in the presence of tantalum is explained in terms of enhancement passivity and cathodic reactions of the alloys.

Original languageEnglish
Pages (from-to)1491-1512
Number of pages22
JournalCorrosion Science
Volume40
Issue number9
DOIs
Publication statusPublished - 1998 Sep 1

Keywords

  • Corrosion
  • Manganese alloy
  • Sulfuric acid

ASJC Scopus subject areas

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

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