ELEKTRISK LEDENDE SUBSTRAT FORSYNT MED ET PALLADIUMNIKKELBELEGG OG FREMSGANGSMAATE VED FREMSTILLING AV DET BELAGTE SUBSTRAT.

摘要

A permanently solderable palladium-nickel electroplated coating is formed on electrically conductive surfaces. The coating has a first alloy layer of 46 to 82 atomic percent palladium and 18 to 54 atomic percent nickel. This first layer is covered by a continuous second layer of 96 to 100 atomic percent metallic palladium and 0-4 atomic percent nickel. The second layer has a thickness of up to twenty angstroms. The second layer is formed by dipping the first layer in a solution of sulfuric or hydrochloric acid.