Ok. So this is what I did.
pressure is important and so is replacing the “air” with an inert “gas”. Have you ever welded? or brazed?. If not you will have to picture a steel frame which is lined with plexi/glass which is also lined with fire bricks. On the top part you have a regulator which is attached to your inert gas and the bottom part a valve exhaling air which is heavier then your inert gas. You need to do the math volume in = volume out. Also the specific gravity of your gas and air. Once replaced shut off your volume out and keep your volume in running until you have achieved you desire pressure.
You are protecting the carbon and preventing oxidation. With out it carbon explodes or should I say creats porosity. That’s why tig welding mild steel is tough. then melt with plasma or electrical field. This information should not be considered true and unless you are an expert do not try this experiment. All information is considered read only and is not intended for practical use
