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International Journal of Corrosion
Volume 2011 (2011), Article ID 491564, 11 pages
http://dx.doi.org/10.1155/2011/491564
Research Article

Electrochemical Noise Chaotic Analysis of NiCoAg Alloy in Hank Solution

Centro de Investigación en Ingeniería y Ciencias Aplicadas , UAEM Avenida Universidad 1001, Col. Chamilpa, Cuernavaca, MOR, Mexico

Received 27 January 2011; Accepted 30 March 2011

Academic Editor: Ravin Kumar Dayal

Copyright © 2011 D. Bahena et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The potential and current oscillations during corrosion of NiCoAg alloy in Hank solution were studied. Detailed nonlinear fractal analyses were used to characterize complex time series clearly showing that the irregularity in these time series corresponds to deterministic chaos rather than to random noise. The chaotic oscillations were characterized by power spectral densities, phase space, and Lyapunov exponents. Electrochemical impedance was also applied the fractal dimensions for the corroded surface was obtained, and a corrosion mechanism was proposed.