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Welding a gas tank with argon/co2 purge?

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Registered Users
Supporting Member
Jan 6, 2010
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Midland Ontario Canada
Normally when I welded gas tank repairs I had 2 cylinders of Pure Argon, one to purge/fill the gas tank, the other to TIG weld with. I only have one cylinder of pure Argon now, don't want to pay a year lease on a 2nd anymore. I also have 25% Argon/CO2 mix for the Mig welder. Anyone know if I could use the 25% for the purge?

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