Resumo

VERGARA GUILLEN, Leonardo Eladio; NEREY CARVAJAL, Luis Manuel  e  GUEDEZ TORCATES, Víctor Manuel. Characterization of anodizing process on aluminum Al3003 and Al6063 using the multifactorial analysis and robust design techniques. Rev. Téc. Ing. Univ. Zulia [online]. 2012, vol.35, n.3, pp.233-242. ISSN 0254-0770.

This study pretends to quantify the effect of the process parameters in the anodizing of aluminum Al3003 and Al6063. For it, were made studies of the micro-hardness, roughness, thickness of layer and porosity of the anodized surface, using multifactorial analysis and robust design techniques. The following parameters levels were established: temperature [15°C, 25°C], time [30min; 60min], electrolyte concentration [1.2M; 2M], current density [1Amp/dm²; 3Amp/dm²], aluminum [Al3003, Al6063], and the plastic deformation [0%,10%,20%,30%], as noise parameter. A combined fractional design 2^7-2 was proposed, a total of 48 tests were made using sulfuric acid electrolytic solutions. The measurement of micro- hardness was made with an indentador Vickers loaded with 400g; the measurement of roughness Ra was made with a surface roughness tester MITUTOYO SJ-201P; and electronic microscopy was used to observe the porosity and the thickness of the oxide layer. A variance analysis (ANOVA) was made to establish the significant factors and the robustness of the effects in the results. Micro-hardness [HV]: [85.74-308.87]; roughness [μm]: [0.45-3.28]; porosity [pores]: [410.72-969.52] and thickness of oxide [μm]: [12.82-94.69] results were found. Finally, the best results and their parameters are shown for each response.

Palavras-chave : aluminum; anodizing; factorial design; ANOVA; robustness.

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