摘要
采用微弧氧化工艺对汽车用7075铝合金进行处理,生成氧化铝陶瓷膜。微弧氧化初期,随着微弧氧化时间的延长,致密层增厚,微弧氧化膜的硬度和耐蚀性显著提高;当微弧氧化时间大于100min时,由于致密层难以击穿,表面的疏松层导致微弧氧化膜的硬度增加缓慢,耐蚀性下降。微弧氧化时间为100min时制备的微弧氧化膜具有较高的硬度和最佳的耐蚀性。
7075 aluminum alloy for automobile was treated by micro-arc oxidation technology to obtain ceramic film. In the early stage of micro-arc oxidation, with the increase of micro-arc oxidation time, the thickness of dense layer increased, and the hardness and corrosion resistance of micro-arc oxide film improved obviously. When micro-arc oxidation time was longer than 100 min, the dense layer was difficult to breakdown. Porous layer on the surface of aluminum alloy contributed directly to the slow increase of hardness and the decrease of corrosion resistance. The micro-arc oxide film prepared under the condition of micro-arc oxidation time 100 min possess higher hardness and best corrosion resistance.
出处
《电镀与环保》
CSCD
北大核心
2017年第4期50-53,共4页
Electroplating & Pollution Control
关键词
铝合金
微弧氧化
耐蚀性
aluminum alloy
micro-arc oxidation
corrosion resistance
