Hyperfine Interactions

, Volume 46, Issue 1–4, pp 467–471 | Cite as

Enhanced corrosion resistance in Nd15Fe77B8 by laser surface amorphization

  • J. V. Armstrong
  • J. M. D. Coey
  • J. G. Lunney
  • M. E. G. Lyons


A thin amorphous layer on a NdFeB ingot produced by surface melting using a KrF excimer laser, and subsequent self-quenching is shown to improve the corrosion resistance properties of the ingot. X-ray diffraction and conversion-electron Mössbauer confirm the amorphous nature of the laser-induced surface layer. Potentiodynamic polarization measurements before and after laser treatment show a shift of Ecorr to a more positive value (ΔEcorr∼150 mV) and a reduction in the dissolution current in the passive region. These observations are characteristic of a reduced total corrosion rate.


Corrosion Resistance Corrosion Rate Laser Treatment Excimer Laser Potentiodynamic Polarization 
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Copyright information

© J.C. Baltzer A.G., Scientific Publishing Company 1989

Authors and Affiliations

  • J. V. Armstrong
    • 1
  • J. M. D. Coey
    • 1
  • J. G. Lunney
    • 1
  • M. E. G. Lyons
    • 2
  1. 1.Department of Pure and Applied PhysicsTrinity CollegeDublin 2Ireland
  2. 2.Department of ChemistryTrinity CollegeDublin 2Ireland

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