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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Hi all. I just had an interesting experience with Mg metal when testing to see how easily it would ignite,
Formed a plasma arc using 6 PP3s in series, that worked Would not a simple method like a CCFL driver, fire cement covered Mg strip backed with iron oxide (modified thermite) and the weld underneath then get hot enough for the underlying metal to indeed fuse? The formed Mg2O3 would act as a flux, if not boric acid would be the obvious choice.
Just a crazy idea, and as long as the weld was sealed and filled with flux prior to ignition it should work.
Registered Member #193
Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
Never heat anything in a sealed space without thinking really hard about it first. For example, Boric acid is volatile and would exert rather a lot of pressure under those conditions.
Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
Magnesium is only 2+, MgO is the oxide.
Boric acid would be really corrosive to Magnesium, it would oxidize quickly and the Boric acid would reduce to Boron Oxide.
Magnesium would have to be welded in Argon/Helium, or probably Ammonia (heavy Nitrogen) where the hot gas acts as the flux and ignition suppression at the same time.
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Welding with Mg
