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Article

A Study of the Corrosion Behavior of AHSS Complex-Phase CP 780 Employing an Electrochemical Noise Technique Analyzed by Different Methods

by
Maria Lara-Banda
1,
Facundo Almeraya-Calderón
1,
Jesús Manuel Jáquez-Muñoz
2,
Demetrio Nieves-Mendoza
3,
Miguel Angel Baltazar-Zamora
3,*,
Javier Olguín-Coca
4,
Francisco Estupiñan-Lopez
1,
Jose Cabral Miramontes
1,
Griselda Santiago-Hurtado
5 and
Citlalli Gaona-Tiburcio
1,*
1
Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA), s/n, Faculty of Mechanical and Electrical Engineering, Universidad Autonoma de Nuevo Leon, Ciudad Universitaria, San Nicolás de los Garza 66455, Mexico
2
Instituto Tecnológico de Ciudad Juarez, Av. Tecnológico, 1340, Ciudad Juárez 32500, Mexico
3
Facultad de Ingeniería Civil, Universidad Veracruzana, Xalapa 91000, Mexico
4
Área Académica de Ingeniería y Arquitectura, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km. 4.5., Pachuca 42082, Mexico
5
Facultad de Ingeniería Civil, Universidad Autónoma de Coahuila, Torreón 27276, Mexico
*
Authors to whom correspondence should be addressed.
Metals 2025, 15(1), 59; https://doi.org/10.3390/met15010059
Submission received: 15 November 2024 / Revised: 27 December 2024 / Accepted: 3 January 2025 / Published: 11 January 2025
(This article belongs to the Special Issue Recent Advances in High-Performance Steel)
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Abstract

The automotive industry employs structural steels with E-coats to reduce weight and increase the corrosion resistance of chassis, reducing CO2 emissions. Due to their mechanical properties, part of the chassis is a composite of advanced high-strength steels (AHSS). AHSSs are coated by conversion methods such as phosphate to increase epoxy coating adherence and corrosion resistance. The main point of this research is to characterize an AHSS complex-phase (CP) 780 in blank, with a phosphate coating and an E-coat organic coating using electrochemical noise, employing time-domain, frequency-domain, time–frequency-domain, and chaotic system methods to determine the type and corrosion kinetics of each system. The electrochemical noise technique was made with a conventional three-electrode cell, using a saturated calomel as a reference electrode. Data were recorded at 1024 s, at 1 data per second in a 3.5 wt. % NaCl electrolyte, according to ASTM G199-09. The results show how AHSS CP 780 presented uniform corrosion, similarly to the phosphate sample; however, the E-coat presented a trend of a localized process when analyzed by Wavelets transform. On the other hand, corrosion resistance increased for the E-coat sample, with values of 2.58 × 106 Ω·cm2. According to the results of the research, all the samples are susceptible to present localized corrosion.
Keywords: E-coat; electrochemical noise; chaos theory; corrosion; AHSSs E-coat; electrochemical noise; chaos theory; corrosion; AHSSs
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MDPI and ACS Style

Lara-Banda, M.; Almeraya-Calderón, F.; Jáquez-Muñoz, J.M.; Nieves-Mendoza, D.; Baltazar-Zamora, M.A.; Olguín-Coca, J.; Estupiñan-Lopez, F.; Cabral Miramontes, J.; Santiago-Hurtado, G.; Gaona-Tiburcio, C. A Study of the Corrosion Behavior of AHSS Complex-Phase CP 780 Employing an Electrochemical Noise Technique Analyzed by Different Methods. Metals 2025, 15, 59. https://doi.org/10.3390/met15010059

AMA Style

Lara-Banda M, Almeraya-Calderón F, Jáquez-Muñoz JM, Nieves-Mendoza D, Baltazar-Zamora MA, Olguín-Coca J, Estupiñan-Lopez F, Cabral Miramontes J, Santiago-Hurtado G, Gaona-Tiburcio C. A Study of the Corrosion Behavior of AHSS Complex-Phase CP 780 Employing an Electrochemical Noise Technique Analyzed by Different Methods. Metals. 2025; 15(1):59. https://doi.org/10.3390/met15010059

Chicago/Turabian Style

Lara-Banda, Maria, Facundo Almeraya-Calderón, Jesús Manuel Jáquez-Muñoz, Demetrio Nieves-Mendoza, Miguel Angel Baltazar-Zamora, Javier Olguín-Coca, Francisco Estupiñan-Lopez, Jose Cabral Miramontes, Griselda Santiago-Hurtado, and Citlalli Gaona-Tiburcio. 2025. "A Study of the Corrosion Behavior of AHSS Complex-Phase CP 780 Employing an Electrochemical Noise Technique Analyzed by Different Methods" Metals 15, no. 1: 59. https://doi.org/10.3390/met15010059

APA Style

Lara-Banda, M., Almeraya-Calderón, F., Jáquez-Muñoz, J. M., Nieves-Mendoza, D., Baltazar-Zamora, M. A., Olguín-Coca, J., Estupiñan-Lopez, F., Cabral Miramontes, J., Santiago-Hurtado, G., & Gaona-Tiburcio, C. (2025). A Study of the Corrosion Behavior of AHSS Complex-Phase CP 780 Employing an Electrochemical Noise Technique Analyzed by Different Methods. Metals, 15(1), 59. https://doi.org/10.3390/met15010059

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