The cause of peeling or pitting on the surface of copper plate

The surface of cold rolled copper plate sometimes has the phenomenon of peeling, pitting, pitting, one of the reasons is that it needs to go through multiple rolling processes during processing. In any process, the surface is not cleaned, there will be oxides attached to the surface of the copper plate, the next rolling, it is rolled in the copper plate, resulting in the final copper plate in the finished product processing, the oxide falls off, then pits, pitting and other defects are formed.

Another situation is also more common, that is, because the tightness of the packaging in the process of transportation is not enough, causing the gap between the copper plate and the copper plate to be too large, then in the process of transportation due to vehicle bumps and other situations, causing surface collision friction! Copper, especially copper itself, is a relatively soft metal, and it will inevitably leave ugly pits after a strong collision and friction, which is a property of pinched flatbread with hands that will leave ugly pits.