Influencia de la distribución de precipitados de Al (Mn, Fe, Cr) en la reproducibilidad de la respuesta electroquímica de la aleación AA5083 en disolución de NaCl

A. Aballe; M. Bethencourt; F. J. Botana; M. Marcos; R. M. Osuna

doi:10.3989/revmetalm.2002.v38.i2.389

Influence of the Al (Mn, Fe, Cr) precipitates distribution of the electrochemical response of AA5083 alloy in NaCl solution

Authors

A. Aballe Dpto. de Ciencia de los Materiales e Ingeniería Metalúrgica y Química inorgánica. Facultad de Ciencias del Mar. Universidad de Cádiz
M. Bethencourt Dpto. de Ciencia de los Materiales e Ingeniería Metalúrgica y Química inorgánica. Facultad de Ciencias del Mar. Universidad de Cádiz
F. J. Botana Dpto. de Ciencia de los Materiales e Ingeniería Metalúrgica y Química inorgánica. Facultad de Ciencias del Mar. Universidad de Cádiz
M. Marcos Dpto. de Ingeniería Mecánica y Diseño Industrial. Escuela Superior de Ingeniería. Universidad de Cádiz
R. M. Osuna Dpto. de Ciencia de los Materiales e Ingeniería Metalúrgica y Química inorgánica. Facultad de Ciencias del Mar. Universidad de Cádiz

DOI:

https://doi.org/10.3989/revmetalm.2002.v38.i2.389

Keywords:

Corrosion, AA5083, Electrochemical techniques, Reproducibility

Abstract

The corrosion behavior of alloy AA5083 in solutions of NaCl at 3.5% is controlled by the cathodic precipitates of Al(Mn, Fe, Cr) present in the alloy. These precipitates are not distributed homogeneously on the surface of the alloy. Further, their presence influence the electrochemical response of the alloy. For these reasons, in order to guarantee the reproducibility of electrochemical tests on this alloy, it is necessary to determine the minimum surface area exposed to the medium, which represents the average behavior of the system. In the present study, a systematic analysis has been conducted of the degree of reproducibility of OCP and LP tests as a function of the area of surface exposed for the alloy AA5083 in solutions of NaCl at 3.5%. The results obtained from three sizes of area studied indicate that the minimum area available for exposure required to provide results of good reproducibility is 25.5 cm².

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Published

2002-04-30

How to Cite

Aballe, A., Bethencourt, M., Botana, F. J., Marcos, M., & Osuna, R. M. (2002). Influence of the Al (Mn, Fe, Cr) precipitates distribution of the electrochemical response of AA5083 alloy in NaCl solution. Revista De Metalurgia, 38(2), 100–107. https://doi.org/10.3989/revmetalm.2002.v38.i2.389

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Issue

Vol. 38 No. 2 (2002)

Section

Articles

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