Corrosion Behavior of AA2055 Aluminum-Lithium Alloys Anodized in the Presence of Sulfuric Acid Solution
Source abstract
Abstract
The aim of this work was to evaluate the corrosion behavior of the AA2055 Aluminum-lithium alloy anodized in a sulfuric acid (H2SO4) bath, varying the current density of 0.19 and 1 A·cm−2 and why the sealing solution was water (H2O) and sodium dichromate (Na2Cr2O7). Anodized samples were exposed to a 10 vol.% H2SO4 solution and the electrochemical technique used was electrochemical impedance spectroscopy. Scanning electron microscopy and X-ray photoelectron spectroscopy were employed to characterization of the anodizing layer, determinate morphology and thickness of coatings. The Na2Cr2O7 sealing solution tends to increase the charge transfer resistance and produces a more homogeneous and compact passive oxide layer, and imparts a corrosion inhibition protection to the AA2055. SEM observations indicated that the morphology and thickness of the anodic films formed on AA2055 aluminum-lithium alloy anodized have the best results for both current densities.
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Research context
OpenAlex topics: Anodic Oxide Films and Nanostructures · Corrosion Behavior and Inhibition · Concrete Corrosion and Durability
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Universidad Autónoma de Nuevo León, FIME-Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA), Av. Universidad s/n, Ciudad Universitaria, San Nicolás de los Garza N.L. 66455, Mexico
Universidad Veracruzana, Facultad de Ingeniería Civil, Xalapa 91000, Mexico
Universidad Autónoma del Estado de Hidalgo, Área Académica de Ingeniería y Arquitectura, Carretera Pachuca-Tulancingo Km. 4.5, Pachuca de Soto 42082, Mexico
Centro de Investigación en Materiales Avanzados Subsede Monterrey (CIMAV), Alianza Norte 202, PIIT, Autopista Monterrey-Aeropuerto, Km. 10, Apodaca 66628, Mexico
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