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Fabrication of Sputtered Ce/La, La/Ce Oxide Bilayers on AA6061 and AA7075 Aluminum Alloys for the Development of Corrosion Protective Coatings
This work provides a comparative study on the corrosion protection efficiency of Ce, La films as well as Ce/La and La/Ce oxide bilayered coatings deposited onto AA7075 and AA6061 substrates by the radio frequency (RF) magnetron sputtering technique. The coating thickness ranged approximately from 12...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073953/ https://www.ncbi.nlm.nih.gov/pubmed/29966269 http://dx.doi.org/10.3390/ma11071114 |
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author | Brachetti-Sibaja, Silvia B. Domínguez-Crespo, Miguel A. Torres-Huerta, Aidé M. Rodil-Posada, Sandra E. López-Oyama, Ana B. García-Zaleta, David S. Onofre-Bustamante, Edgar |
author_facet | Brachetti-Sibaja, Silvia B. Domínguez-Crespo, Miguel A. Torres-Huerta, Aidé M. Rodil-Posada, Sandra E. López-Oyama, Ana B. García-Zaleta, David S. Onofre-Bustamante, Edgar |
author_sort | Brachetti-Sibaja, Silvia B. |
collection | PubMed |
description | This work provides a comparative study on the corrosion protection efficiency of Ce, La films as well as Ce/La and La/Ce oxide bilayered coatings deposited onto AA7075 and AA6061 substrates by the radio frequency (RF) magnetron sputtering technique. The coating thickness ranged approximately from 12 to 835 nm, which changed with the deposition parameters and substrate composition. The relationship between microstructure, roughness and electrochemical performance is examined. The reactivity and crystallinity of rare earth (RE) films can be tailored by adjusting the sputtering parameters. Sputtered La films with thickness ca. 390 nm and average roughness of 66 nm showed the best corrosion protection properties in chloride medium as determined by potentiodynamic curves and electrochemical impedance spectroscopy (EIS). The method to obtain RE bilayered coatings, i.e., La/Ce or Ce/La as well as the substrate composition and applied power conditioned their inhibition properties. The RE bilayered coatings displayed better barrier properties than Ce films, which were poorer than those featured by La films. |
format | Online Article Text |
id | pubmed-6073953 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-60739532018-08-13 Fabrication of Sputtered Ce/La, La/Ce Oxide Bilayers on AA6061 and AA7075 Aluminum Alloys for the Development of Corrosion Protective Coatings Brachetti-Sibaja, Silvia B. Domínguez-Crespo, Miguel A. Torres-Huerta, Aidé M. Rodil-Posada, Sandra E. López-Oyama, Ana B. García-Zaleta, David S. Onofre-Bustamante, Edgar Materials (Basel) Article This work provides a comparative study on the corrosion protection efficiency of Ce, La films as well as Ce/La and La/Ce oxide bilayered coatings deposited onto AA7075 and AA6061 substrates by the radio frequency (RF) magnetron sputtering technique. The coating thickness ranged approximately from 12 to 835 nm, which changed with the deposition parameters and substrate composition. The relationship between microstructure, roughness and electrochemical performance is examined. The reactivity and crystallinity of rare earth (RE) films can be tailored by adjusting the sputtering parameters. Sputtered La films with thickness ca. 390 nm and average roughness of 66 nm showed the best corrosion protection properties in chloride medium as determined by potentiodynamic curves and electrochemical impedance spectroscopy (EIS). The method to obtain RE bilayered coatings, i.e., La/Ce or Ce/La as well as the substrate composition and applied power conditioned their inhibition properties. The RE bilayered coatings displayed better barrier properties than Ce films, which were poorer than those featured by La films. MDPI 2018-06-29 /pmc/articles/PMC6073953/ /pubmed/29966269 http://dx.doi.org/10.3390/ma11071114 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Brachetti-Sibaja, Silvia B. Domínguez-Crespo, Miguel A. Torres-Huerta, Aidé M. Rodil-Posada, Sandra E. López-Oyama, Ana B. García-Zaleta, David S. Onofre-Bustamante, Edgar Fabrication of Sputtered Ce/La, La/Ce Oxide Bilayers on AA6061 and AA7075 Aluminum Alloys for the Development of Corrosion Protective Coatings |
title | Fabrication of Sputtered Ce/La, La/Ce Oxide Bilayers on AA6061 and AA7075 Aluminum Alloys for the Development of Corrosion Protective Coatings |
title_full | Fabrication of Sputtered Ce/La, La/Ce Oxide Bilayers on AA6061 and AA7075 Aluminum Alloys for the Development of Corrosion Protective Coatings |
title_fullStr | Fabrication of Sputtered Ce/La, La/Ce Oxide Bilayers on AA6061 and AA7075 Aluminum Alloys for the Development of Corrosion Protective Coatings |
title_full_unstemmed | Fabrication of Sputtered Ce/La, La/Ce Oxide Bilayers on AA6061 and AA7075 Aluminum Alloys for the Development of Corrosion Protective Coatings |
title_short | Fabrication of Sputtered Ce/La, La/Ce Oxide Bilayers on AA6061 and AA7075 Aluminum Alloys for the Development of Corrosion Protective Coatings |
title_sort | fabrication of sputtered ce/la, la/ce oxide bilayers on aa6061 and aa7075 aluminum alloys for the development of corrosion protective coatings |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073953/ https://www.ncbi.nlm.nih.gov/pubmed/29966269 http://dx.doi.org/10.3390/ma11071114 |
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