 Johnson Matthey, Hatton Garden, London. |
The Electrodeposition of Platinum and Platinum Alloys
Platinum Metals Review
Article Synopsis
Work on the electrolytic deposition of platinum and some platinum alloys is reviewed, and the results of our recent work on the deposition and the properties of the layers produced from some promising electrolytes are briefly discussed. In general, studies of plating solutions are restricted by the economic availability of the relevant platinum salts. On the other hand the hydrolysis of the platinum salts in solution, and the incorporation of decomposition products are also critical factors, especially for their influence on internal stress. Recent work has shown that it is possible to deposit platinum-cobalt alloys which have excellent magnetic and mechanical properties, and these alloy deposits look very promising for data storage applications and for small permanent magnet layers.