Characterization of anodizing process on aluminum Al3003 and Al6063 using the multifactorial analysis and robust design techniques.

• Leonardo Eladio Vergara Guillén Universidad de Los Andes-Venezuela
• Luis Manuel Nerey Carvajal Universidad de Los Andes-Venezuela
• Víctor Manuel Guédez Torcates Universidad de Los Andes-Venezuela

Resumo

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 con- centration [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 27-2 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.