Study of Ni-W Coating and Properties

• Main Authors: Tsai Chun Chen, 陳采君
• Other Authors: Allen Bai
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/53825944383051561666

碩士 === 高苑科技大學 === 化工與生化工程研究所 === 98 === In this study, DC plating and Pulse-reverse methods were used to deposit Ni-W alloy on pure Cu plate. Means of X-ray, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Vickers hardness (Hv) and corrosion resistance were used to measure Ni-W alloy. Ni-W alloy, which were deposited by DC plating were prepared in tungstate sulfate concentration of 0.2M, pH of 7.5, current density of 0.4 A/cm2, and at 65 ℃.Tungsten content of Ni-W alloy were found 51.04 wt%. Moreover, the Ni-W alloy with 51 wt% W have smooth surface and better corrosion resistance by pulse-reverse plating. The hardness of Ni-W alloy, which was prepared in the pulse plating, is 1045Hv. After thermal treatment, Ni-W alloy is changed from amorphous crystallization to crystalline structure. Moreover, the hardness of Ni-W alloy were raised up 1674Hv. Consequently, Ni-W alloy have a significant passivating region of 1.45V ,and corrosion current density of -1.973 mA/cm-2.