| 脉冲频率及占空比对稀土镁合金微弧氧化膜的影响 |
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| 引用本文： | 郭雪锋,彭光怀,张小联,胡珊玲.脉冲频率及占空比对稀土镁合金微弧氧化膜的影响[J].赣南师范学院学报,2009,30(6):58-60. |
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| 作者姓名： | 郭雪锋 彭光怀 张小联 胡珊玲 |
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| 作者单位： | 赣南师范学院,江西省镁合金工程技术研究中心,江西赣州341000 |
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| 基金项目： | 江西省科技厅工业攻关重点项目 |
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| 摘 要： | 采用覆层测厚仪、SEM、电化学工作站等研究了脉冲占空比和频率对Mg-4Gd-3Y-0．5Zr微孤氧化膜的生长、表面微观形貌和耐腐蚀性能的影响．结果表明，占空比、频率对膜层厚度影响较小；随着脉冲频率的增加，氧化膜袁面微孔数量增多、孔径减小，粗糙度降低；而随着占空比的增加，变化趋势则相反；膜层耐蚀性随频率和占空比的增加均先增强后降低，最佳频率和占空比分别为600Hz、10％．
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| 关 键 词： | 微弧氧化 脉冲频率 占空比 耐蚀性 |
Effects of Pulse Frequency and Duty Cycle on Micro-arc Oxidation Film of RE-Mg Alloy |
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| GUO Xue-feng,PENG Guang-huai,ZHANG Xiao-lian,HU Shan-lin.Effects of Pulse Frequency and Duty Cycle on Micro-arc Oxidation Film of RE-Mg Alloy[J].Journal of Gannan Teachers' College(Social Science(2)),2009,30(6):58-60. |
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| Authors: | GUO Xue-feng PENG Guang-huai ZHANG Xiao-lian HU Shan-lin |
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| Institution: | GUO Xue-feng, PENG Guang-huai, ZHANG Xiao-lian, HU Shan-lin ( Jiangxi Magnesium Alloy Engineering Research Center, C.annan Normal University, Ganzhou 341000, China) |
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| Abstract: | The effects of pulse frequency and duty cycle on the microstructure and corrosion resistance of micro-arc oxidation film of Mg-4Gd-3Y-0.5Zr alloy was investigated by SEM,coating thickness gauge and electrochemical workstation etc.The results show that the duty cycle and frequency have little effect on growth thickness.More pores with smaller diameters and rougher surface were found on the film when the frequency increased while opposite changes occurred with the increase of duty cycle.Corrosion resistance of the film increases first and thereafter decreases as frequency and duty cycle raise gradually and the optimal conditions were 600Hz and 10%. |
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| Keywords: | microarc oxidation pulse frequency duty cycle corrosion resistance |
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