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Comportement en matière de corrosion des composés d'un système de LaFe(13-x)Si(x).

Corrosion behaviour of LaFe(13-x)Si(x) system compounds.

Auteurs : WANG J., CHEN Y., TANG Y., et al.

Résumé

The corrosion behaviour of LaFe(13-x)Si(x) alloys were studied in this paper. The materials were prepared by arc melting and annealed at 1623 K for 3 h. X-ray diffraction and scanning electron microscope (SEM) show that the. NaZn(13) type phase is the main phase, alpha-Fe is present in form of globular grains while the LaFeSi phase is distributed along the grain boundaries of the main phase. The SEM shows that the phase containing more lanthanum corrodes faster than other phases. La(2)[CO(3)]3-H(2)O(8) was formed due to the existence of CO2 in the solution in the open system, and Fe(OH)3 was deposited on the bottom of bottle after 168 h immersion. H2C2O4 and NaOH were used to adjust the pH value, and the result show that the corrosion current of LaFe(11.6)Si(1.4) alloy in alkaline solution is smaller than that in acid solution.

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Pages : 2009-3

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Détails

  • Titre original : Corrosion behaviour of LaFe(13-x)Si(x) system compounds.
  • Identifiant de la fiche : 2009-1627
  • Langues : Anglais
  • Source : 3rd International Conference on Magnetic Refrigeration at Room Temperature
  • Date d'édition : 11/05/2009

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