Galvanic Corrosion behavior between Anodized Aluminum Alloy and Copper Alloy

• Main Authors: Kuan-Hung Chen, 陳冠宏
• Other Authors: Liu-Ho Chiu
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/24718913476084950873

碩士 === 大同大學 === 材料工程學系(所) === 101 === The galvanic corrosion behavior of the anodic oxidized AA6061 Al and C1100 Cu couples has been investigated. The anodizing of AA6061-T6 Al plates was controlled to obtain different thickness of 1μm, 5μm and 15μm, respectively. The galvanic corrosion current of the anodized aluminum plate and C1100 copper plate couples was measured by using a zero resistance ammeter in different solution for 8 hours. The control parameters of galvanic corrosion are as following: electrolytes using 3.5wt% NaCl solution and 1.0wt% NaClO solution; temperatures at 25oC, 40oC and 60oC. The results show that AA6061-T6 aluminum plate have the highest galvanic corrosion current, 1200 μA/cm2, among tested specimens under flowing NaClO electrolyte at 60oC. The anodized AA6061-T6 aluminum plates of 15μm anodized layer has the lowest galvanic corrosion current, 15 μA/cm2, in a static 3.5wt% NaCl electrolyte at 25oC. The severe corrosion attack can be observed at the aluminum specimen with thin and non-uniform anodized layer after the galvanic corrosion tests. It is illustrated that the anodizing processing of AA6061 Al plate can effectively reduce the galvanic corrosion of the AA6061 Al and C1100 Cu couples.