Covered electrode, talk about it.

Argon arc welding has no harm to the surface of welding scar, but the light beam produced in the welding process is very harmful. If the protection is not good, it will burn the skin and eyes, and it will usually take two days. If you are engaged in this industry for a long time, it will have a little impact on fertility. As for the oxidation you mentioned, it is caused by the size of welding current and the quality of argon protection. Generally speaking, it is normal for the weld surface to be golden yellow to dark blue. If it is black with oxidation holes, it means that the current is too large or argon gas protection is not good. Be careful not to have wind blowing during welding.