Evaluación de probetas de aluminio anodizado mediante ruido electroquímico. Comparación con su comportamiento frente a la corrosión en la atmósfera

N. Betancourt; F. Corvo; A. Mendoza; J. Simancas; M. Morcillo; J. A. González; F. Fragata; J. J. Peña; M. Sánchez de Villalaz; S. Flores; E. Almeida; S. Rivero; O. T. de Rincón

doi:10.3989/revmetalm.2003.v39.iExtra.1094

Electrochemical noise evaluation of anodized aluminum. Comparative study against corrosion behaviour in the atmosphere

Authors

N. Betancourt Chemistry Division. National Center for Scientific Research (CNIC)
F. Corvo CENIM (CSIC)
A. Mendoza CENIM (CSIC)
J. Simancas Chemistry Division. National Center for Scientific Research (CNIC)
M. Morcillo Chemistry Division. National Center for Scientific Research (CNIC)
J. A. González Chemistry Division. National Center for Scientific Research (CNIC)
F. Fragata CEPEL, Cidade Universitaria. Rio de Janeiro
J. J. Peña ESPOL Guayaquil
M. Sánchez de Villalaz Universidad Tecnológica de Panamá
S. Flores Instituto de Corrosión y Protección. Pontificia Universidad Católica
E. Almeida INETI
S. Rivero Universidad de la República. Montevideo
O. T. de Rincón Facultad de Ingeniería. Universidad del Zulia

DOI:

https://doi.org/10.3989/revmetalm.2003.v39.iExtra.1094

Keywords:

Aluminum, Corrosion, Electrochemical noise, Anodized aluminum, Atmospheric corrosion

Abstract

The present work reports the evaluation of aluminum and anodized aluminum by electrochemical noise, as a part of the PATINA/CYTED project of the working group Nº 5. A visual examination is also made. The samples were exposed at several Ibero-American atmospheres up to 2 years of exposure. Different thickness of anodized aluminum were evaluated. The electrochemical potential noise of the 5 μm unexposed sample (pattern) showed a different behaviour to that showed by the other anodized specimens. This could be due to a slower sealed of the samples of higher thickness. The same behaviour was observed on the samples exposed at the rural station El Pardo. According to the visual examination, the samples of bare aluminum and those of anodized 5 μm thickness were the most affected by pitting corrosion in the highly polluted atmospheres. A good correlation between corrosion behaviour determined by visual examination and EN was obtained.

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Published

2003-12-17

How to Cite

Betancourt, N., Corvo, F., Mendoza, A., Simancas, J., Morcillo, M., González, J. A., Fragata, F., Peña, J. J., Sánchez de Villalaz, M., Flores, S., Almeida, E., Rivero, S., & de Rincón, O. T. (2003). Electrochemical noise evaluation of anodized aluminum. Comparative study against corrosion behaviour in the atmosphere. Revista De Metalurgia, 39(Extra), 38–42. https://doi.org/10.3989/revmetalm.2003.v39.iExtra.1094

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Issue

Vol. 39 No. Extra (2003)

Section

Articles

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