Potentiodynamic Polarization Performance of a Novel Composite Coating System of Al2O3/Chitosan-Sodium Alginate, Applied on an Aluminum AA6063 Alloy for Protection in a Chloride Ions Environment
Source abstract
Abstract
In this research work, a preliminary potentiodynamic polarization performance testing was carried out on a new environmentally friendly proposed composite coating. The proposed composite coating was developed by: (a) hot sulfuric anodizing to produce an Al2O3 conversion film followed by an (b) organic electrodeposited chitosan–sodium alginate blended film. Posteriorly, the conversion and organic films were microstructurally characterized by scanning electron microscopy. Finally, the polarization resistance technique was used to measure the corrosion resistance of the uncoated and coated AA6063 alloy in a simulated marine environment and the polarization tests were compared to samples immersed during 30 days in same electrolyte solution. The obtained inhibition corrosion efficiency of the proposed coating system was measured comparing the Rp of the uncoated alloy to the coated samples, showing an efficiency about 99% for a 3% NaCl electrolyte for some of the samples. Therefore, the experimental results obtained during this research demonstrates the feasibility of using the developed anticorrosive composite coating to protect aluminum alloys against chloride corrosive ions species and to further continue with the corresponding research.
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Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Anodic Oxide Films and Nanostructures · Concrete Corrosion and Durability
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
CONACYT, Corporación Mexicana de Investigación en Materiales, Saltillo C.P. 25290, Coahuila, Mexico
Centro de Investigación en Ingeniería y Ciencias Aplicadas-UAEM, Av. Universidad 1001, Col. Chamilpa, Cuernavaca 62210, Morelos, Mexico
Instituto de Metalurgia, Universidad Autónoma de San Luis Potosí, Lomas Segunda Sección, No. 550, San Luis Potosí 78210, Mexico
CONACYT-UASLP, Instituto de Metalurgia de la Universidad Autónoma de San Luis Potosí, Lomas Segunda Sección, No. 550, San Luis Potosí 78210, Mexico
CONACYT-CIATEQ, Unidad San Luis Potosí, Eje 126 No. 225, Zona Industrial, San Luis Potosí C.P. 78395, Mexico
CIATEQ, Unidad San Luis Potosí, Eje 126 No. 225, Zona Industrial, San Luis Potosí C.P. 78395, Mexico
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