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Corrosion behavior of iron–aluminum alloys and its composite steel in sulfuric acid

Authors
Journal
Corrosion Science
0010-938X
Publisher
Elsevier
Publication Date
Volume
48
Issue
4
Identifiers
DOI: 10.1016/j.corsci.2005.02.025
Keywords
  • A. Alloy
  • Intermetallics
  • B. Xps
  • Sem
  • C. Acid Corrosion

Abstract

Abstract The corrosion behavior of an iron–aluminum alloy with bcc structure and a composite of an iron–aluminum and a steel was studied in H 2SO 4 solution. The corrosion resistance deteriorates with increasing aluminum content of an iron–aluminum alloy. XPS measurements showed a magnetite formation on the corroded surface and a preferential corrosion of iron. The corrosion resistance for the composite of an iron–aluminum alloy and a CrMo steel is comparable to that of a CrMo steel. This implies that a corrosion-resistant composite is achievable by controlling the aluminum content of the Fe–Al alloy without the additives.

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