CAJ | 학술논문

针对 ZM6铸造镁合金，为获得综合性能优异的陶瓷膜层，在硅酸钠和氢氧化钠的碱性溶液中，用双向脉冲电源进行微弧氧化处理。采用环境扫描电镜（SEM）、X 射线衍射（XRD）研究陶瓷膜层微观形貌及组成，采用拉伸法、中性盐雾试验、轴向加载疲劳试验等方法研究附着力、耐蚀性及疲劳性能等。结果表明：陶瓷膜层大致由表层疏松层、中间致密层以及内部过渡层组成，表层疏松多孔，过渡层与基体紧密结合。陶瓷层与基体结合好，附着力大于50MPa；微弧氧化处理后，大幅度提高合金耐腐蚀性能，中性盐雾大于336h；陶瓷膜层使基体疲劳性能降低18％。
침대 ZM6주조미합금，위획득종합성능우이적도자막층，재규산납화경양화납적감성용액중，용쌍향맥충전원진행미호양화처리。채용배경소묘전경（SEM）、X 사선연사（XRD）연구도자막층미관형모급조성，채용랍신법、중성염무시험、축향가재피로시험등방법연구부착력、내식성급피로성능등。결과표명：도자막층대치유표층소송층、중간치밀층이급내부과도층조성，표층소송다공，과도층여기체긴밀결합。도자층여기체결합호，부착력대우50MPa；미호양화처리후，대폭도제고합금내부식성능，중성염무대우336h；도자막층사기체피로성능강저18％。
Micro-arc oxidation (MAO)process on ZM6 Mg alloy was carried out in a dual electrolyte system of sodium silicate and sodium hydroxide alkalescent solution.The microstructure characteris-tics of coatings were investigated by scanning electron microscopy (SEM)and X-ray diffraction (XRD).The performance of adhesion,corrosion resistance and fatigue was evaluated by dynamic stretch training,neutral salt spray test and axial loading fatigue test.The results show that MAO coating consists of three layers,outer layer,medial layer and inner layer.The outer layer is porous and loose,however the inner layer has good bond strength with substrate,which is above 50MPa. The MAO coating can improve corrosion resistance of substrate significantly.The neutral salt spray test is above 336 h.Compared with the sample without MAO coating,the reduction of fatigue is a-bout 18%.