Abstract
Satisfactory immersion plating processes have been developed for the deposition of palladium, rhodium, ruthenium, and platinum up to thicknesses of 50, 30, 100, and 65 μ in., respectively. These coatings may be sealed by various means, including immersion in boiling water, in ammonium hydroxide, or in a replacement gold solution. Adherent coatings which provide useful wear‐resistance in addition to protection against tarnish and corrosion have been deposited on copper and certain copper alloys.