电流密度对Ni/WC-Co纳米复合镀层性能的影响  

Influence of Current Density on the Performances of Ni/WC-Co Nano Composite Coating

作　　者：宋见[1] 陈吉[1] 

机构地区：[1]辽宁石油化工大学机械工程学院,辽宁抚顺113001

出　　处：《电镀与环保》2016年第6期7-9,共3页Electroplating & Pollution Control

摘　　要：采用直流电沉积方法,在黄铜基体上制备出Ni/WC-Co纳米复合镀层。分别采用SEM和XRD表征镀层的表面形貌和结构,采用微米压痕仪测量镀层的硬度,采用电化学工作站测量镀层的极化曲线。结果表明:Ni/WC-Co纳米复合镀层的耐蚀性随电流密度的增大呈现出先升高后降低的趋势;当电流密度为10A/dm2时,Ni/WC-Co纳米复合镀层的耐蚀性最好,自腐蚀电位最正,自腐蚀电流密度最小。Ni/WC-Co nano composite coating was prepared on brass substrate by using direct current electrodeposition method. The surface morphology and structure of coating were characterized by SEM and XRD respectively, the hardness of coating was measured by micron indentation instrument, and the polarization curves of coating was measured by electrochemical station. Results showed that the corrosion resistance of Ni/WC-Co nano composite coating increased first and then decreased with the increasing of current density. When the current density was 10 A/dm^2, the Ni/WC-Co nano composite coating exhibit the best corrosion resistance, the self-corrosion potential was more positive, and the self-corrosion current density was lowest.

关 键 词：电流密度 纳米晶 WC-CO 耐蚀性 

分 类 号：TQ153[化学工程—电化学工业]