process for hartloeten of copper to aluminum

摘要

In a process for brazing copper to aluminium using an Al-Si base brazing alloy, a metallic intermediate layer of Ni, Co or Cr is deposited on the copper from a compound thereof prior to applying the brazing alloy. The example discloses electrodeposition of a nickel layer, a current density of 5 amps./cm.2 being used for 45 minutes. The brazing of aluminium fins on a copper tube is also referred to.