Adding no to the argon or argon/helium mixture does the trick

摘要

The effect of NO (nitrogen monoxide) as an additive in shielding gases has been used successfully for many years as a patented solution to reduce ozone levels in the welders breathing zone. New findings have concluded that the NO addition also has a very good effect on the welding properties in MIG and TIG welding of aluminium. Adding NO remarkably stabilises the arc, giving an improved control of the weld ppl and results in a more regular surface of the weld together with a substantial increase of the peretration.