How to avoid depressions on the surface of the copper strip


Many people have encountered the situation of peeling o […]

Many people have encountered the situation of peeling or pits on the surface of the copper plate or copper strip, and the last thing cannot be used for these reasons. Indeed, this is a very troublesome problem, because once there are pits or pits on the surface, peeling will make the whole board unusable, which is a big waste for many units and the cost increases a lot! But what is the reason? Is there any way to avoid it?

Sometimes peeling, pitting and pitting appear on the surface of cold-rolled copper plates. One of the reasons is that multiple rolling processes are required during the processing. In any process, if the surface is not cleaned, oxides will adhere to the surface of the copper plate. In the next rolling, it will be rolled in the copper plate, causing the oxide to fall off during the finished product processing, and then forming pits, pits and other defects.



To give a simple example, when you use a rolling pin, sprinkle a few sesame seeds on the surface of the cake, and the sesame seeds will be embedded in the cake, but if the sesame seeds fall off during the process of wrapping the cake, it will become a pit!

Another common situation is that the packaging is not tight enough during transportation and the gap between the copper plates is too large. Therefore, the bumpy vehicle during transportation will cause surface collision and friction. Copper, especially copper, is a relatively soft metal. After strong collision and friction, it will inevitably leave unsightly pits. The reason is similar to the unsightly pits left when kneading bread by hand.

So from production to transportation, seemingly simple links are essential!