It was found that during the electrodepositing process, the grain size of the welding seam and that of the matrix metal is not the same grade so that the current distribution in the cathode is uneven.

• 研究发现,在电解铜箔生产中,阴极辊表面焊缝处组织与基体金属组织晶粒尺寸不同级,因此电流在阴极上分布不均匀,在相同时间内沉积的铜箔厚度也不均匀,厚度差引起铜箔色差,形成光亮带;