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http://nopr.niscpr.res.in/handle/123456789/18919| Title: | Cobalt tungsten alloy-electrodeposition and characterisation |
| Authors: | Subramanian, A Kousalya, G N Muralidharan, V S Vasudevan, T |
| Issue Date: | Nov-2002 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Bright Co-W alloy on steel is obtained from the optimised bath with the operating conditions of cobalt sulphate 0.15 M sodium tungstate 24 gpl, ammonium chloride 0.2 M, sodium citrate 0.2 M, dimethyl sulphoxide 0.06 M, pH 8 at 4 Adm-2. The hardness of the alloy deposit is two times that of cobalt deposit. The corrosion resistance in 1.0 M acidic solutions for Co-20% W alloy is in the order of HCl > H2SO4 > HClO4. The deposition of cobalt on platinum takes place from cobalt citrate complex. This citrate complex undergoes successive electron transfer. During the Co-W alloy deposition on platinum, cobalt tungstate complex undergoes reduction to form an alloy. The dissolution of Co-W alloy film occurs from Co-W intermediate phase. |
| Page(s): | 513-518 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Appears in Collections: | IJCT Vol.09(6) [November 2002] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCT 9(6) 513-518.pdf | 1.51 MB | Adobe PDF | View/Open |
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