The purpose of shielding the weld area is to prevent air from contacting the weld puddle and the electrode. A vacuum would be ideal. My idea is to get a very large amount of vacuum, pressurize it, and fill a cylinder with the pressurized vacuum and release it the same way you would use argon. If a user uses a large amount, they could condense the vacuum into liquid vacuum for efficiency. Dixon
- posted
16 years ago