脉冲频率对Ni-W合金镀层耐蚀性的影响  

Effects of Pulse Frequency on the Corrosion Resistance of Ni-W Alloy Coatings

作　　者：韩啸[1] 陈吉[1] 许志显 吴新春[1] 孙东来[2] 

机构地区：[1]辽宁石油化工大学机械工程学院石油化工过程腐蚀与防护技术中心,辽宁抚顺113001 [2]甘肃蓝科石化高新装备股份有限公司,甘肃兰州730000

出　　处：《电镀与环保》2015年第1期13-15,共3页Electroplating & Pollution Control

摘　　要：采用脉冲电沉积方法在黄铜基体上制备出Ni-W合金镀层.研究不同脉冲频率（0.5～20.0 kHz）对镀层表面形貌、微观结构、硬度及耐蚀性的影响.所有Ni-W合金镀层的表面均致密平整,W的质量分数为42.41％～48.92％.脉冲频率为5.0 kHz时制备的Ni-W合金镀层在3.5％的NaCl溶液中的耐蚀性最好,自腐蚀电流密度为2.532 μA/cm2,自腐蚀电位为-327 mV.Ni-W alloy coatings were prepared on brass substrate by pulse electrodeposition,and effects of pulse frequency （0.5～20.0 kHz） on the surface morphology,microstructure,hardness and corrosion resistance of the coatings were studied.Results showed that the Ni-W alloy coatings obtained exhibit smooth surface and compact structure,and the mass fraction of tungsten element involved was from 42.41 % to 48.92 %.Furthermore,the coating prepared at pulse frequency of 5.0 kHz showed better corrosion resistance in 3.5 % NaCl solution,the selfcorrosion current density was 2.532 μA/cm2 and the self-corrosion potential was-327 mV.

关 键 词：NI-W合金 脉冲电沉积 耐蚀性 脉冲频率 

分 类 号：TQ153[化学工程—电化学工业]