The AA7075–CS1018 Galvanic Couple under Evaporating Droplets
Por:
Montoya M., Genesca J., Montoya R.
Publicada:
1 ene 2024
Categoría:
Materials science (miscellaneous)
Resumen:
The galvanic corrosion behavior of the AA7075–CS1018 couple was examined in dynamic electrolytes using the ZRA technique. A modified electrochemical setup was developed to support the use of thin-film gel and liquid electrolytes on metallic surfaces. This allowed the collection of chemical information, left behind by the liquid electrolyte during evaporation, through a thin-film gel. The analysis of the gel electrolyte film confirmed the acidification on AA7075 and the alkalinization on CS1018 but also offered novel insights on their dependence on the galvanic current. The galvanic current was proportional to the initial NaCl concentration in the range of 0.01 to 0.06 M. However, due to continuous evaporation, the NaCl concentration increased, limiting oxygen diffusion and decreasing the galvanic current, especially for electrolytes exceeding 0.06 M. The galvanic current was determined by considering the dynamic evolution (caused by the evaporation of the electrolyte film) of both the thickness of the electrolyte and its concentration. © 2024 by the authors.
Filiaciones:
Montoya M.:
Unidad de Investigación y Tecnología Aplicadas de la UNAM (UNITA), Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Apodaca, 66628, Mexico
Genesca J.:
Unidad de Investigación y Tecnología Aplicadas de la UNAM (UNITA), Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Apodaca, 66628, Mexico
Montoya R.:
Unidad de Investigación y Tecnología Aplicadas de la UNAM (UNITA), Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Apodaca, 66628, Mexico
gold, All Open Access; Gold Open Access
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