| 不同电压下镁合金的微弧氧化行为 |
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| 引用本文： | 王蕊,马跃洲,陈明,田庆涛.不同电压下镁合金的微弧氧化行为[J].腐蚀与防护,2011(5). |
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| 作者姓名： | 王蕊 马跃洲 陈明 田庆涛 |
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| 作者单位： | 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室; |
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| 基金项目： | 甘肃省科技重大专项资助项目(0702GKDA024) |
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| 摘 要： | 为了解电压在镁合金微弧氧化中的作用,本工作在双极性脉冲电源的恒流加载方式下,通过考察电压对氧化时间、膜层厚度及表面形貌的影响,研究电压对微弧氧化机理的影响。结果发现,当负电压为零,占空比20%和30%时,电压低于380V时所需的氧化时间要短于电压高于380V时的氧化时间。当占空比30%,负电压为零和40V时,电压低于340V的氧化时间和膜层增长速率都小于电压高于340V的;电压低于340V时的膜层表面形貌优于340V以上膜层。可见,微弧氧化过程中存在一个临界电压,微弧氧化过程分成两种情况,两种情况的微弧氧化机理不尽相同。
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| 关 键 词： | 镁合金 做弧氧化 脉冲电源 氧化时间 临界电压 |
Micro-arc Oxidation Behavior of Magnesium Alloy at Different Voltages |
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| WANG Rui,MA Yue-zhou,CHEN Ming,TIAN Qing-tao.Micro-arc Oxidation Behavior of Magnesium Alloy at Different Voltages[J].Corrosion & Protection,2011(5). |
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| Authors: | WANG Rui MA Yue-zhou CHEN Ming TIAN Qing-tao |
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| Affiliation: | WANG Rui,MA Yue-zhou,CHEN Ming,TIAN Qing-tao (State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials,Lanzhou Univ of Tech.,Lanzhou 730050,China) |
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| Abstract: | For making clear the role of voltage in micro-arc oxidation of magnesium alloys,experiments were carried out in the bipolar pulse output mode and under constant current load to investigate the influence of voltage on oxidation time,film thickness and surface morphology.The results indicated that when the negative voltage was zero and duty cycle was 20%and 30%respectively,the oxidation time at 380 V was less than that above 380 V.When the negative voltage was 0 V and 40 V.the oxidation time and film thicknes... |
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| Keywords: | magnesium alloy micro-arc oxidation pulse power source oxidation time critical voltage |
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