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Hydrogen generation from a single crystal magnetite coupled galvanically with a carbon steel in sulfate solution

Authors
Journal
Corrosion Science
0010-938X
Publisher
Elsevier
Publication Date
Volume
44
Issue
3
Identifiers
DOI: 10.1016/s0010-938x(01)00093-2
Keywords
  • Hydrogen Generation
  • Magnetite
  • Carbon Steel
  • Galvanic Coupling
  • Scanning Electrochemical Microscopy
Disciplines
  • Chemistry

Abstract

Abstract A galvanic coupling with a single crystal magnetite accelerated the corrosion of a carbon steel in sulfate solutions. A scanning electrochemical microscopic investigation revealed that the hydrogen generation on the magnetite as well as the reduction of the magnetite itself was contributed to a galvanic corrosion of the carbon steel. The estimated current efficiency for the hydrogen generation on the magnetite was about 50% in pH 5.8 sulfate solution. Moreover, the distribution of hydrogen generated above the magnetite surface was observed with the probe current image.

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