Effect of aluminium alloy surface heterogeneities on anodic layer growth and properties

Authors

  • M. J. Bartolomé Centro Nacional de Investigaciones Metalúrgicas (CENIM). Consejo Superior de Investigaciones Científicas (CSIC)
  • S. Feliu Jr. Centro Nacional de Investigaciones Metalúrgicas (CENIM). Consejo Superior de Investigaciones Científicas (CSIC)
  • V. López Centro Nacional de Investigaciones Metalúrgicas (CENIM). Consejo Superior de Investigaciones Científicas (CSIC)
  • E. Escudero Centro Nacional de Investigaciones Metalúrgicas (CENIM). Consejo Superior de Investigaciones Científicas (CSIC)
  • J. A. González Centro Nacional de Investigaciones Metalúrgicas (CENIM). Consejo Superior de Investigaciones Científicas (CSIC)
  • S. Feliu Centro Nacional de Investigaciones Metalúrgicas (CENIM). Consejo Superior de Investigaciones Científicas (CSIC)

DOI:

https://doi.org/10.3989/revmetalm.2007.v43.i4.71

Keywords:

Anodising, Aluminium, Alloying elements, Surface heterogeneities, Aluminium oxide

Abstract


In the present work, X-ray photoelectron spectroscopy (XPS) is used to study sealed and unsealed anodic coatings obtained on pure-Al and on Al-Cu, Al-Mg-Si and Al-Mg alloys. In general, the sealing process is seen to produce a significant increase in the O/Al ratio in the anodic coatings. This increase is more considerable with the Al-Cu and Al-Mg alloys than with the pure Al and the Al-Mg-Si alloy, perhaps due to the greater porosity of the coatings obtained on the former. An attempt is made to establish possible relationships between anodic film characteristics and surface heterogeneities, which also act in the phase prior to anodising. According to the results of this work, these heterogeneities affect the degree of dissolution of the metallic substrate during the anodising operation.

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Published

2007-08-30

How to Cite

Bartolomé, M. J., Feliu Jr., S., López, V., Escudero, E., González, J. A., & Feliu, S. (2007). Effect of aluminium alloy surface heterogeneities on anodic layer growth and properties. Revista De Metalurgia, 43(4), 252–265. https://doi.org/10.3989/revmetalm.2007.v43.i4.71

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