Patent ID: 6372055
Filing Date: 2002-04-16
Classification: C23C,C23F,H05K

Abstract:
A method of replenishing an adhesion promoting bath comprising acid, oxidizer, corrosion inhibitor and optionally, one or more additional components selected from the group consisting of amines, surfactants, stabilizers for the oxidant, water soluble polymers and sources of halide ions, after an extended shut down of 6 hours or longer, comprising the steps of first adjusting the concentration of the acid, the oxidant, the corrosion inhibitor and the one or more optional components to working levels and then adding an additional amount of corrosion inhibitor sufficient to provide a replenished adhesion promoting bath providing conversion coated substrate surfaces having brown or dark brown color and not having reduced peel strength as compared to conversion coated substrate surfaces treated just prior to such extended shut down.