摘要
为了提高铝合金在海水中的耐磨性,对LY12铝合金进行微弧氧化,采用扫描电镜、X射线衍射仪观察微弧氧化膜形貌并分析其成分;采用UMT-2型摩擦磨损试验机研究了微弧氧化膜在人造海水中的摩擦学性能。结果表明:LY12铝合金表面的微弧氧化膜由致密内层和疏松外层组成,在人造海水中微弧氧化膜的摩擦系数比LY12铝合金的低,摩擦磨损达到稳定状态后,前者的平均摩擦系数约为后者的1/3,微弧氧化膜能有效提高LY12铝合金在海水中的耐磨性。
Micro-arc oxidation of LY12 aluminum alloy was conducted so as to improve the corrosion resistance in seawater. The morphology of as-obtained micro-arc oxidation coating was observed with a scanning electron microscope,and its composition was analyzed with an X-ray diffractometer. Moreover, the friction and wear behavior of the micro-arc oxidation coating in artificial seawater was evaluated with a UMT-2 friction-wear testing machine.Results indicated that the micro-arc oxidation coating on Al alloy surface consisted of compact internal layer and loose out layer,and it exhibited lower friction coefficient in artificial seawater than the Al alloy substrate. Particularly,at the steady state of friction,the friction coefficient of the micro-arc oxidation coating was only about 1 /3 of that of the Al alloy substrate,and the micro-arc oxidation coating was able to significantly improve the corrosion resistance of LY12 Al alloy in seawater.
出处
《材料保护》
CAS
CSCD
北大核心
2014年第3期20-22,69,共3页
Materials Protection
关键词
微弧氧化
LY12铝合金
人造海水
摩擦学性能
micro-arc oxidation
LY12 aluminum alloy
artificial seawater
friction and wear behavior
