Influence of anodizing process on tensile strength AA 6061 T6

Abstract

To determine the effect of sulfuric acid electrolyte concentration and the most optimal electrical potential during the anodizing process on the tensile strength of aluminum alloy 6061 T6. The anodizing process of aluminum alloy is carried out at different electrolyte concentrations, which are 10, 20 and 30% of the volume of sulfuric acid used. As a cathode, carbon rods are used. The duration of the process for each electrolyte concentration is 15 minutes, while the potential used is 10 V, 20 V and 30 V. The tensile testing process is carried out using a Universal Testing Machine and surface morphology is investigated using Scanning Electron Microscopy Phenom G2 Anodizing process using 20% sulfuric acid electrolyte concentration and 20 V potential has the highest ultimate tensile strength. However, on the surface morphology, the pore size starts to enlarge when compared to the potential and concentration of the electrolyte below. As for the potential and higher concentrations of sulfuric acid, there is a decrease in tensile strength and an increase in pore size. This can make an understanding concept of how AA 6061 T6 reacts to the tensile stress after anodizing process is carried out, so that it can later be applied to industry and machinery.

Torsion Strength of Dissimilar Metals Friction Weld Joint of A6061-St41 Round Bar with Various One-Sided Chamfer Angle and Burn-Off Length

“…Aluminum and its alloys are corrosion resistant materials because they have a very low hydrogen potential, but have a strong protective layer [2]. This protective layer is a barrier oxide that is formed naturally and firmly bonded to its surface and can protect aluminum and its alloys from corrosion [3]. In the aluminum alloys, aluminum alloy A6061 has corrosion resistance, good weldability, and fairly good formability [4].…”