Alloy coatings for electrical contacts
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United States of America Patent
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-
Jul 18, 1989
Issued Date -
N/A
app pub date -
Apr 29, 1988
filing date -
Jul 1, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A plating bath and process for electroplating coatings of palladium nickel alloys on a conductive substrate at current densities in the range of 10 amps/sq. ft. to 150 amps/sq. ft. wherein the palladium content of the alloy remains substantially constant despite current density variations during plating. The alloy composition stability is achieved by adding at least about 15 parts per million of iodide and/or iodate ions to the plating bath. The as-plated alloy has a thin surface layer which contains iodide at or near the surface.
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