Electrochemical Noise Analysis: An Approach to the Effectivity of Each Method in Different Materials
Jesús Manuel Jáquez-Muñoz,
Citlalli Gaona-Tiburcio,
Ce Tochtli Méndez-Ramírez,
Cynthia Martínez-Ramos,
Miguel Angel Baltazar-Zamora,
Griselda Santiago-Hurtado,
Francisco Estupinan-Lopez,
Laura Landa-Ruiz,
Demetrio Nieves-Mendoza,
Facundo Almeraya-Calderon
Affiliations
Jesús Manuel Jáquez-Muñoz
Universidad Autónoma de Ciudad Juárez, Ciudad Juárez 32315, Mexico
Citlalli Gaona-Tiburcio
Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA), Universidad Autónoma de Nuevo León FIME, San Nicolás de los Garza 66455, Mexico
Ce Tochtli Méndez-Ramírez
Facultad de Ingeniería Civil, Universidad Veracruzana, Xalapa 91000, Mexico
Cynthia Martínez-Ramos
Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA), Universidad Autónoma de Nuevo León FIME, San Nicolás de los Garza 66455, Mexico
Miguel Angel Baltazar-Zamora
Facultad de Ingeniería Civil, Universidad Veracruzana, Xalapa 91000, Mexico
Griselda Santiago-Hurtado
Facultad de Ingeniería Civil, Universidad Autónoma de Coahuila, Torreón 27276, Mexico
Francisco Estupinan-Lopez
Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA), Universidad Autónoma de Nuevo León FIME, San Nicolás de los Garza 66455, Mexico
Laura Landa-Ruiz
Facultad de Ingeniería Civil, Universidad Veracruzana, Xalapa 91000, Mexico
Demetrio Nieves-Mendoza
Facultad de Ingeniería Civil, Universidad Veracruzana, Xalapa 91000, Mexico
Facundo Almeraya-Calderon
Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA), Universidad Autónoma de Nuevo León FIME, San Nicolás de los Garza 66455, Mexico
Corrosion deterioration of materials is a major problem affecting economic, safety, and logistical issues, especially in the aeronautical sector. Detecting the correct corrosion type in metal alloys is very important to know how to mitigate the corrosion problem. Electrochemical noise (EN) is a corrosion technique used to characterize the behavior of different alloys and determine the type of corrosion in a system. The objective of this research is to characterize by EN technique different aeronautical alloys (Al, Ti, steels, and superalloys) using different analysis methods such as time domain (visual analysis, statistical), frequency domain (power spectral density (PSD)), and frequency–time domain (wavelet decomposition, Hilbert Huang analysis, and recurrence plots (RP)) related to the corrosion process. Optical microscopy (OM) is used to observe the surface of the tested samples. The alloys were exposed to 3.5 wt.% NaCl and H2SO4 solutions at room temperature. The results indicate that HHT and recurrence plots are the best options for determining the corrosion type compared with the other methods due to their ability to analyze dynamic and chaotic systems, such as corrosion. Corrosion processes such as passivation and localized corrosion can be differentiated when analyzed using HHT and RP methods when a passive system presents values of determinism between 0.5 and 0.8. Also, to differentiate the passive system from the localized system, it is necessary to see the recurrence plot due to the similarity of the determinism value. Noise impedance (Zn) is one of the best options for determining the corrosion kinetics of one system, showing that Ti CP2 and Ti-6Al-4V presented 742,824 and 939,575 Ω·cm2, while Rn presented 271,851 and 325,751 Ω·cm2, being the highest when exposed to H2SO4.