Using Electroless Method to Improve Corrosion Resistance of Magnesium Alloy (AZ91D)

• Main Authors: BAI, JIA-SIANG, 白家祥
• Other Authors: BAI, YU-LUN
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/92160211156323269804

碩士 === 高苑科技大學 === 化工與生化工程研究所 === 101 === Electroless plating is used to prepare Si film on AZ91D ally before micro arc oxidation process. In this work, oxide film on AZ91D alloy is detected hardness, morphology, crystalline, composition and corrosion resistance. When AZ91D alloy immerses during 24 hours in eletroless process to get a high Si content of 3.78 atm.% and hardness of 285Hv. Moreover, the oxide film has a better OCP value of 0. According to the results, the optimal preparation parameter to form a better corrosion resistance of oxide film on AZ91D alloy is up-limit potential of 170V, low-limit potential of 30V, pulse-plating period of 50ms, reveres-plating of 50ms and 12000 duty cycles. The optimal preparation condition can form a low corrosion current of 0.011mA/cm 2 with long passivation potential from -2 to 10 V. Keywords: AZ91D, Magnesium alloy, Silicon oxide, Oxide film, Electroless, Corrosion resistance