Galvanic corrosion of rare earth modified AM50 and AZ91D magnesium alloys coupled to steel and aluminium alloys

  1. Mohedano, Marta 1
  2. Arrabal, Raúl 1
  3. Pardo, Angel 1
  4. Paucar, Karín 2
  5. Merino, M. Concepción 1
  6. Matykina, Endzhe 1
  7. Mingo, Beatriz 1
  8. Garcés, Gerardo 3
  1. 1 Departamento de Ciencia de Materiales, Facultad de Químicas, Universidad Complutense
  2. 2 Gabinete de Corrosión, Facultad de Ingeniería Química y Textil, Universidad Nacional de Ingeniería
  3. 3 Centro Nacional de Investigaciones Metalúrgicas (CENIM). CSIC
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Revista:
Revista de metalurgia

ISSN: 0034-8570

Año de publicación: 2014

Volumen: 50

Número: 1

Páginas: 2-2

Tipo: Artículo

DOI: 10.3989/REVMETALM.002 DIALNET GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: Revista de metalurgia

Resumen

Se emplearon medidas electroquímicas y gravimétricas para examinar el efecto de la adición de neodimio y gadolinio en el comportamiento a la corrosión galvánica de las aleaciones AM50 y AZ91D en contacto con acero al carbono A 570 Gr 36 y aleaciones de aluminio AA2011 y AA6082. Las aleaciones modificadas con tierras raras mostraron intermetálicos Al2Nd/Al2Gd y Al-Mn-Nd/Al-Mn-Gd, menor fracción de fase β-Mg17Al12 y un incremento de la resistencia a la corrosión debido al aumento de la pasividad de la superficie y a la eliminación de micro pares galvánicos. Las adiciones de neodimio y gadolinio mejoraron la resistencia a la corrosión galvánica de la aleación AM50, pero fueron menos efectivas en el caso de la aleación AZ91D. La aleación AA6082 fue el material más compatible y la aleación AA2011 el menos compatible.

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