Setyawan, Pungky Eka, Sonalitha, Elta, Asmono, Didit Abryanto and Refitra, Rifki Akbar (2021) Investigation of the Effect of Anodizing Dyes Using Purple Cabbage and Dragon Fruit Peel on Aluminum 6061alloy. International Journal of Advances in Scientific Research and Engineering-IJASRE, 7 (2). pp. 15-27. ISSN 2454-8006

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Abstract

Anodizing on aluminum 6061 was carried out to improve the mechanical properties and aesthetic value of the specimen surface.
Anodizing produces a thin, porous oxide layer resulting in hard surface properties and corrosion resistance. The pores resulting
from the anodizing process can be used to provide various colors when filled with dyes. Coloring in the anodizing process can be
done with chemical dyes or natural dyes. Anodizing using chemical solutions produces waste that can be harmful to the
environment. To overcome this pollution problem, a natural dye solution is used using dyes from purple cabbage and dragon fruit
peel so that it is expected to minimize the impact of environmental pollution. The purpose of this study was to investigate the effect
of using natural dyes produced from purple cabbage and dragon fruit peel on anodizing aluminum 6061. The investigation is
carried out through visual color testing, coating thickness testing, micro-structure testing, and micro Vickers hardness testing.
From these results, it was found that the variation in the concentration of the dye solution did not affect the thickness of the
resulting oxide layer. The oxide layer and pore size are influenced by temperature, electric current, voltage, solution
concentration, and immersion time in the electrolyte solution during the anodizing process. So the factors that greatly influence
the diffusion quality of the dye solution

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