Studies of Electrochemical Abrasive Polishing on the Cylindrical Surface of Aluminum Using Conductive Polymer Tool

• Main Authors: Yu Lee, 李昱
• Other Authors: Yuang-Cherng Chiou
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/25514026468869412924

碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 104 === Pure aluminum is often applied in various advanced industry due to its excellent mechanical properties. Two polishing methods are usually used, including chemical polishing and electro-polishing, but the solutions used by them are generally toxic and not recyclable. In this study, a non-toxic electrolyte is used to conduct the electrolytic polishing and the composite electrolytic abrasive polishing. In the electrolytic experiments for aluminum plate, the phosphoric acid and ethanol solution is the optimal electrolyte to obtain the best surface roughness. Three different methods are conducted to polish the cylindrical surface of pure aluminum using a conductive polymer as a cathode, including abrasive polishing, electrolytic polishing, and composite electrolytic abrasive polishing. The effect of load on the surface roughness is investigated in the abrasive polishing experiments. Results show that the optimal surface roughness can achieve Ra=0.076 μm and Rmax=0.53 μm at 0.1 N load with 0.3 μm Al_2 O_3 particles after 6 minutes. In the electrolytic polishing experiments, the optimal surface roughness can achieve Ra=0.086 μm and Rmax=0.61 μm at 0.15 A current after 6 minutes. In the composite electrolytic abrasive polishing, the optimal parameters obtained by the abrasive polishing and the electrolytic polishing are selected. Hence, the composite electrolytic abrasive polishing is conducted under 0.1 N load and 0.15 A current with 0.3 μm Al_2 O_3 particles mixed in phosphoric acid and ethanol solution. The surface roughness can achieve Ra=0.053 μm and Rmax=0.48 μm after 6 minutes. This study confirms that both polishing mechanism of abrasive and electrolysis are effective to polish the cylindrical surface of pure aluminum.