Analysis of the reason for peeling of copper sheet

When many people use the red copper sheet, they will find that the surface of the red copper sheet has peeling or dents. The red copper sheet has good electrical conductivity, thermal conductivity, corrosion resistance and processing performance, and can be welded and brazed. These peeling or pits cannot be used. For welding, the copper sheet is peeled off and cannot be used, which will cause the whole plate to waste a lot of units. Next, let’s take a look at the analysis of the reasons for the peeling of the copper sheet.

When many people use the red copper plate, they will find that the surface of the red copper sheet has peeling or dents. The red copper sheet has good electrical conductivity, thermal conductivity, corrosion resistance and processing performance, and can be welded and brazed. These peeling or pits cannot be used. For welding, the copper sheet is peeled off and cannot be used, which will cause the whole plate to waste a lot of units. Next, let’s take a look at the analysis of the reasons for the peeling of the copper sheet.
1. The galvanized layer is not processed cleanly. Use concentrated hydrochloric acid and hydrogen peroxide to peel off the passivated galvanized layer. Many hardware friends often encounter that zinc alloy products are plated with a layer of broken coating after ironing the iron sheet. , which is why.
2. The peeling off of the galvanized steel sheet indicates that the adhesion of the coating is poor, which is mainly caused by improper treatment before electroplating. The degreasing and degreasing process should be checked to see if the degreasing is complete. In addition, weak corrosion treatment should be carried out before electroplating, and the workpiece should be electroplated immediately after weak corrosion, so that the adhesion of the coating on the fresh and active surface will be much better.
3. In the process of processing, it needs to go through several rolling processes. In any process, if the surface is not clean, there will be oxides attached to the surface of the copper plate. The next rolling will be rolled on the copper plate, resulting in the copper plate being processed in the finished product. The oxide falls off, which in turn forms pits, pitting, and other defects.
4. During the processing, the temperature is too high, the thermal expansion coefficient of the metal is different, the cleaning of the electroplating surface is not good, and the copper layer is too thick.
5. Due to the lack of packaging sealing during transportation, the gap between the copper plate and the copper plate is too large. Then in the process of transportation, due to vehicle bumps and other conditions, surface collision and friction are caused! The copper plate itself is a relatively soft metal, and it will inevitably peel off in strong collision and friction.
There is a phenomenon of bubbling between the copper plate and the copper layer. First of all, we must judge from the simple to the difficult. First, we need to see whether there is activation. Adjust the activation solution, the activation is good and there will be no foaming.