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Specs for Palladium
Here are the applicable specifications:
MIL-P-45209B
A gray, dense deposit, good for undercoats. Good wear characteristics corrosion, resistance and catalytic properties. Good conductivity.
| Thickness | Comments |
| .000050" unless otherwise specified | Steel springs and other steel parts subject to flexure or repeated impact and of hardness greater than Rockwell C40 shall be heated to 375°F ±25°F for 3 hours after plating. |
Palladium is the lightest and least noble of the platinum group of metals. With a low specific gravity compared to gold or platinum, a thicker coat with less weight is realized, but a small sacrifice in reflectivity and corrosion can be expected. Gold overplating enhances the performance of the palladium surface.
| Type Class | Thickness | Comments |
| Standard | 0.75µm | Unless otherwise specified. |
| US Govt. | 1.3µm | Unless otherwise specified. |
| Nickel Underplate | 1.3µm | On copper or copper alloy to inhibit diffusion into the palladium; to level rough substrate; to act as a load bearing foundation; and to act as a pore corrosion inhibitor. |
| Possible applications | 0.08 - 0.25µm | Semiconductor head frames in integrated circuity. |
| 0.25 - 0.5µm | Catalyst. Electrical contacts where little adverse electrical, mechanical and environmental action is expected. | |
| 0.75-1.5µm | Low-energy electrical connector contacts. |
