甘氨酸对AZ31B镁合金阳极氧化膜的影响  

Effect of Glycine on Anodic Oxide Film of AZ31B Magnesium Alloy

作　　者：熊中平[1] 司玉军[1,2] 郑兴文[1] 李敏娇[1] 

机构地区：[1]四川理工学院化学与制药工程学院,四川自贡643000 [2]四川理工学院材料腐蚀与防护四川省重点实验室,四川自贡643000

出　　处：《电镀与环保》2015年第5期47-50,共4页Electroplating & Pollution Control

基　　金：材料腐蚀与防护四川省重点实验室项目(2013CL14;2014CL07);四川理工学院人才引进项目(2012RC16);四川省科技厅项目(2014JY0007)

摘　　要：以环保型碱性硅硼体系为基础电解液,以甘氨酸为添加剂,对AZ31B镁合金进行阳极氧化处理。结果表明:在相同的电流密度和氧化时间下,向电解液中添加甘氨酸所得氧化膜的厚度增加、膜厚分布更均匀;氧化膜的形貌更为致密、平整;氧化膜的膜电阻和电荷传递电阻增大,对基底的保护性能增强,从而改善镁合金的耐蚀性。甘氨酸的质量浓度为5g/L时所得氧化膜具有最优的结构和性能。Anodizing of AZ31B magnesium alloy was carried out selecting eco-friendly alkaline silicon boron system as basis electrolyte and glycine as an additive. Results showed that, for the same current density and oxidation time, the oxide film obtained with the electrolyte containing glycine has smoother and compacter surface, more uniform thickness, higher film resistance and charge-transfer resistance compared with that obtained without glyeine. Moreover, oxide film play a protection function, which improved the corrosion resistance of magnesium alloy. The oxide film obtained under the condition of glycine mass concentration 5 g/L present the optimal structure and performances.

关 键 词：镁合金 阳极氧化 甘氨酸 耐蚀性 

分 类 号：TG606[金属学及工艺—金属切削加工及机床]