Rare earth conversion coatings grown on AA6061 aluminum alloys. Corrosion studies.

Authors

  • Miguel Antonio Domínguez-Crespo Instituto Politécnico Nacional
  • Silvia Beatriz Brachetti-Sibaja Instituto Tecnológico de Ciudad Madero (ITCM)
  • Aidé Minerva Torres-Huerta Instituto Politécnico Nacional
  • Wencel de La Cruz-Hernández Universidad Nacional Autónoma de México

DOI:

https://doi.org/10.29356/jmcs.v58i4.48

Keywords:

Aluminum alloy, Chemical conversion coatings, Rare earth elements, Corrosion evaluation, Cerium oxide, Lanthanum oxide

Abstract

The present work is aimed to investigate the corrosion resistance of rare earth (RE) protective coatings deposited by spontaneous deposition on AA6061 aluminum alloy substrates. Coatings were deposited from water-based Ce(NO3)3 and La(NO3)3 solutions by varying parameters such as rare earth solution concentration, bath temperature and immersion time. The values of the Tafel slopes indicate that the cathodic process is favored by concentration polarization rather than activation polarization.

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Author Biographies

Miguel Antonio Domínguez-Crespo, Instituto Politécnico Nacional

CICATA

Aidé Minerva Torres-Huerta, Instituto Politécnico Nacional

CICATA

Wencel de La Cruz-Hernández, Universidad Nacional Autónoma de México

Centro de Nanociencias y Nanotecnología

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Published

2017-10-12

Issue

Vol. 58 No. 4 (2014): Regular Issue

Section

Regular Articles

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