Thermal annealing of palladium alloys

Details Thermal annealing of palladium alloys Thermal annealing of palladium alloys

1991-07-22

1993-01-19

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Treating electrolytic or nonelectrolytic coating after it is...

205257, 205265, C25D 550

Patent

active

051804824

ABSTRACT:
This invention is concerned with production of electrical devices comprising an electrodeposited conductive region free from cracking defects. In the production of a contact portion of the device from a metal strip electroplated with a conductive stripe of an alloy, the stripe exhibited, upon stamping and forming operation, cracked areas. Typically, the stripe coating on the metal strip, such as a copper bronze material, includes a layer of nickel, a layer of palladium alloyed with nickel, cobalt, arsenic or silver, and a flash coating of hard gold. The cracking defects were eliminated by subjecting the plated strip to an annealing treatment prior to the stamping and forming operation. After the heat-treatment, the stripe was free from cracks and separations between the successive layers.

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