Why do bubbles appear when welding color-coated boards

Color coated plate in welding due to external factors sometimes appear bubble phenomenon, this phenomenon will make the welding is not solid and also affect the aesthetic degree, so we should try to avoid this situation when welding, then what is the cause of this phenomenon? Only by finding the cause can we solve it better. I'm going to explain it to you.
1. If the surface of the color coated plate weld is not clean, it is easy to lead to the appearance of bubbles, such as the existence of oil, water and other components. In this regard, we can clean the surface of the weld to solve this problem.

2. The impure protection gas will also lead to the formation of bubbles. 99.99% argon gas can be used to deal with this problem.
3. If the end of the welding wire is exposed to air, bubbles will also occur. Therefore, we want to welding color coated plate, so that the end of the welding wire has been in one of the protection of inert gas.
The above three methods can be a good prevention of color coated plate welding bubbles, for the bubbles have appeared, we can directly use the angular polishing machine to grind off. We can refer to the content of this article in the actual operation in the future, I believe it can solve your problem very well.
If you have any unclear questions, you can contact the sales staff of Tezhong Materials for consultation at any time.