【摘要】 研究了在AZ31镁合金表面依次进行浸锌、化学镀镍、电镀铜、电弧离子镀Cr/CrN的复合镀膜工艺。结果表明,在此复合镀工艺条件下,可以在AZ31镁合金表面形成致密度高、结合强度好、耐蚀性好且硬度高的复合合金镀层。AZ31镁合金镀膜后的显微硬度形成一个梯度,由71HK提高到2225HK;耐蚀性明显提高,在3.5%NaCl溶液中腐蚀电位从-1481mV提高到-382mV。更多还原

【Abstract】 The AZ31 magnesium coatings were deposited in a series of coating steps consecutively,including electro-galvanizing,electroless plating of Ni,electroplating of copper,arc ion plating of Cr/CrN on magnesium alloy substrates.The coatings were characterized with X-ray diffraction(XRD)and scanning electron microscopy(SEM).The results show that high quality coatings can be obtained with strengths including compactness,strong interfacial adhesion,and high hardness and good corrosion resistance.Its gradient of the micro-hardness ranges from 71 HK to 2225 HK,and its corrosion resistance improves,with its corrosion potential increasing from-1481 mV to-382 mV in a 3.5% NaCl solution.更多还原