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Co-Mn尖晶石涂层的制备

DOI: 10.11903/1002.6495.2014.150, PP. 141-146

Keywords: 电镀,Co-Mn合金,pH值,电流密度,尖晶石涂层

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Abstract:

采用氯化物溶液在430不锈钢表面电沉积Co-Mn合金,重点研究了镀液pH值和电流密度对镀层微观结构及成分的影响。结果表明pH值为2.5~6.5、电流密度为125~225mA/cm2时,镀层中的Mn含量随着pH值和电流密度的增大而增加;电流密度为125和175mA/cm2时,pH值是决定合金成分的主要因素,电流密度达到225mA/cm2时电流密度是影响合金成分的主要因素;电镀Co-Mn合金的优化工艺参数为pH值为4.5、电流密度为125mA/cm2,此时镀层质量良好,Mn含量可达20%(原子分数)以上;通过除氢处理及在800℃空气中的氧化处理,合金镀层转变为连续、与基体结合良好的MnCo2O4尖晶石涂层。

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