Development of a new electroplating process for Ni-W alloy deposits |
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Authors: | Io Mizushima Peter T. Tang Hans N. Hansen Marcel A.J. Somers |
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Affiliation: | Department of Manufacturing Engineering and Management, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark |
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Abstract: | In the present work, the effect of the complexing agents citrate, glycine and triethanolamine (TEA) on the electrodeposition of Ni-W layers from electrolytes based on NiSO4 and Na2WO4, is investigated. The investigations include measurement of the current efficiencies, determination of the tungsten content in the electrodeposits (by energy dispersive X-ray analysis), voltammetry studies and characterization of complex formation by UV-spectrometry. High W content and current efficiency could be realized by using electrolytes containing all of the three complexing agents. The results show that small amounts of glycine in a citrate-triethanolamine based electrolyte positively influences both the mass-transfer and the deposition potential. |
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Keywords: | Nickel-tungsten Electrodeposition Complexing agent Microstructure XRD patterns |
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