Copper member for battery

摘要

The present invention provides a copper member having a high adhesion stability, free from corrosion caused by hydrofluoric acid generated from the electrolyte of the battery terminal and water. A composite covering layer of an aminated phenol phenol polymer, a trivalent chromium compound and a phosphorus compound on the surface of a foil-shaped or sheet-shaped copper member. The composite covering layer has an aminated phenol polymer deposit weight from 1 to 200 mg/m2>, a chromium deposit weight from 0.5 to 50 mg/m2>, and a phosphorus deposit weight of 0.5 to 5 mg/m2>.