Pulse current electrodeposition and corrosion properties of Ni-W alloy coatings

被引：41

作者：

Zemanova, M. ^{[1
]}

Krivosudska, M. ^{[1
]}

Chovancova, M. ^{[1
]}

Jorik, V. ^{[1
]}

机构：

[1] Slovak Univ Technol Bratislava, Dept Inorgan Technol, Bratislava 81237, Slovakia

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2011年 / 41卷 / 09期

关键词：

Ni-W alloy; Pulse plating; Electrodeposition; Morphology; Corrosion resistance; NICKEL-TUNGSTEN ALLOYS; NANOCRYSTALLINE; ELECTROLYTE; SURFACE; STEEL; FILMS;

D O I：

10.1007/s10800-011-0331-y

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Ni-W alloy coatings were prepared on a mild steel substrate by means of pulse current (PC) and compared to the coatings electrodeposited by direct current (DC). In particular the study dealt with the influence of the frequency using pulse current on the surface morphology while maintaining a constant duty cycle. A constant charge for DC and PC electrodeposition of Ni-W alloy coatings was used. The morphology of the coatings was explored by scanning electron microscopy and the composition of the coatings was analysed by X-ray powder diffraction and energy dispersive X-ray analysis. Corrosion resistance of Ni-W alloy coatings was investigated by potentiodynamic polarization in a chloride medium. The corrosion products were analysed by Raman spectroscopy. It was found that the temperature of the electrolysis affects current efficiency of the DC and PC electrodeposition. The frequency of pulse electrodeposition alters the morphology of the Ni-W alloy coatings. There was evidence of the positive influence of increased tungstate concentration in the electrolyte on corrosion resistance of the Ni-W alloy coatings.

引用

页码：1077 / 1085

页数：9

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