镁合金电解抛光工艺  

Electrolytic polishing process for magnesium alloy

作　　者：尹树明[1] 宗朔通 刘龙飞[1] 

机构地区：[1]沈阳化工大学数理系,辽宁沈阳110142

出　　处：《电镀与涂饰》2013年第12期46-48,共3页Electroplating & Finishing

摘　　要：采用高氯酸–无水乙醇溶液对AZ31镁合金进行电解抛光。以抛光过程中的电流密度、抛光样品的失重和反光率为性能指标,研究了抛光液中的高氯酸含量和抛光电压对抛光效果的影响。得到电解抛光的最佳工艺为:高氯酸与无水乙醇的体积比1∶9,抛光电压7 V(电流密度2.465 A/dm2),抛光温度0°C,抛光时间5 min。采用最佳工艺抛光后,样品的反光率可达91%。该工艺成本较低,可采用冰水混合物控温,有望在生产(尤其是电子背散射衍射样品的制备)中推广和应用。AZ31 magnesium alloy was electrolytically polished in perchloric acid-anhydrous alcohol solution. The effects of perchloric acid concentration in polishing solution and polishing voltage on electro-polishing effectiveness were studied using the current density in polishing process as well as the weight loss and reflectivity of polished sample as the performance indexes. The optimal process conditions are as follows： volume ratio of perchloric acid to anhydrous alcohol 1：9, voltage 7 V （current density 2.645 0 A/dm2）, temperature 0℃, and time 5 min. The reflectivity of the sample polished under the optimal conditions reaches 91%. The cost of the given process is low, and the temperature can be controlled using ice water mixture, thus making it hopeful to be popularized and applied to production, especially for preparing the samples of electron backscatter diffraction.

关 键 词：镁合金 电子背散射衍射 电解抛光 反射率 失重 

分 类 号：TG175[金属学及工艺—金属表面处理]