Intergranular corrosion of a Fe-Cr alloy surface enriched in Mo or Ni by electron beam alloying

C. Vignaud, M. Keddam, F. Pillier, S. Tosto, F. Nenci

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Abstract

A superficial layer, enriched in Mo (2 to 8 at. %) and Ni (12 wt %) onto a FeCr alloy substrate, has been obtained using the electron beam alloying technique. The crystallographic structure of the melted layer is identified by SEM and TEM. The potentiodynamic current-voltage curves are recorded and the intergranular corrosion resistance is evaluated after potentiostatic attack in the transpassive range in 0.5 M H2SO4. The influence of the matrix impurities as C, P, Ti, and S must be taken into account. In fact, some elements may segregate in the grain-boundaries of the new alloy and in some cases induce a harmful intergranular corrosion.
Original languageEnglish
Pages (from-to)781 - 784
Number of pages4
JournalMaterials Science Forum
Volume207-209
Issue numberPART 2
Publication statusPublished - 1996
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Vignaud, C., Keddam, M., Pillier, F., Tosto, S., & Nenci, F. (1996). Intergranular corrosion of a Fe-Cr alloy surface enriched in Mo or Ni by electron beam alloying. Materials Science Forum, 207-209(PART 2), 781 - 784.