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© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Aluminum presents localized corrosion when exposed to marine and industrial environments. In this research, we study the pitting susceptibility of Al7075 coated by a SiO2 sol–gel coating as a corrosion inhibitor employing the electrochemical noise technique. The analysis methods were power spectral densities (PSDs) in noise impedance (Zn), complaints by wavelet transform, recurrence plots, and Hilbert–Huang study due to the chaotic behavior of the EN signal. To perform the EN, the parameters employed were 2048 data, 1 datum per second in NaCl, and H2SO4 electrolytes at 3.5 wt.% simulating marine and industrial environments. EN tests were performed following ASTM G199. The results showed an increase in the localized corrosion process when SiO2 coating was applied. This is due to the cracking morphology of the coating.

Details

Title
Study of Al7075 Localized Corrosion Inhibition by a SiO2 Superhydrophobic Coating Employing an Electrochemical Noise Technique
Author
Vázquez Nuñez, Luis Eduardo 1 ; Cornejo-Monroy, Delfino 1   VIAFID ORCID Logo  ; Sánchez-Santamaria, Betania 1   VIAFID ORCID Logo  ; José Saúl Arias-Cerón 2   VIAFID ORCID Logo  ; Villanueva-Montellano, Alfredo 1   VIAFID ORCID Logo  ; López-Ibarra, Aurora Abigail 1   VIAFID ORCID Logo  ; Jáquez-Muñoz, Jesús Manuel 3   VIAFID ORCID Logo 

 Instituto de Ingeniería y Tecnología, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez 32310, Mexico; [email protected] (L.E.V.N.); [email protected] (B.S.-S.); [email protected] (A.V.-M.); [email protected] (A.A.L.-I.) 
 Engineering Department, Universidad Popular Autónoma del Estado de Puebla, Puebla 72410, Mexico; [email protected] 
 Departamento Metal-Mecánica, Instituto Tecnológico de Ciudad Juárez, Ciudad Juárez 32500, Mexico 
First page
131
Publication year
2025
Publication date
2025
Publisher
MDPI AG
e-ISSN
20796412
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3170968028
Copyright
© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.