赵晴,章志友,陈宁.终止电压对MB8镁合金微弧氧化膜耐蚀性的影响[J].表面技术,2007,36(4):4-6.
ZHAO Qing,ZHANG Zhi-you,CHEN Ning.Effect of Final Voltage on Corrosion Resistance of MB8 Mg Alloys by Micro-arc Oxidation[J].Surface Technology,2007,36(4):4-6 |
| 终止电压对MB8镁合金微弧氧化膜耐蚀性的影响 |
| Effect of Final Voltage on Corrosion Resistance of MB8 Mg Alloys by Micro-arc Oxidation |
| 投稿时间：2007-03-15 修订日期：2007-08-10 |
| DOI： |
| 中文关键词: 微弧氧化 镁合金 耐蚀性 终止电压 |
| 英文关键词:Micro-arc oxidation Magnesium alloy Corrosion resistance Final voltage |
| 基金项目:江西省自然科学基金(0450099) |
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| 中文摘要: |
| 采用SEM、XRD、动电位极化曲线及电化学阻抗等测试方法，研究了MB8镁合金微弧氧化过程中不同终止电压下获得的陶瓷膜层的耐蚀性能。结果表明：终止电压越高，膜层越厚；微火花阶段，膜层表面均匀、结晶细致，腐蚀电流密度较小，阻抗较大；弧放电阶段，膜层孔径变大，陶瓷层内显微缺陷增多，腐蚀电流密度增大，阻抗减小。由此得出结论：膜层耐蚀性能由膜层厚度与终止电压共同决定，微火花放电末期膜层的耐蚀性能优于弧放电阶段的耐蚀性能。 |
| 英文摘要: |
| With scanning electron microscopy ( SEM) , X-ray Diffraction ( XRD) , potentiodynamism polarization curves, electronmicroscopy impeclance spectroscopy ( EIS) , corrosion resistance of membrane produced at different final voltage on MB8 magnesium alloy substrates by micro-arc oxidation ( MAO) technique had been investigated. The results show: the higher the final voltage, the thicker the membrane; micro sparking oxide coating exhibites better performance of compact, homogeneous and high resistance comparing with arc-oxide coatings in which pore diameter augment and micro-defect multiply of ceramic coatings. Thereby comes to the conclusion that the membrane level erosion codetermines with membrane thickness and final voltage , the erosion of membrane at micro spark discharge last stage excels than arc discharge membrane. |
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