by Chuck Meyer
(Savannah Georgia)
Ive already picked up a lot of good information from your site
but i still have two dilemmas... one is a paste flux adequate for shielding the back of a 300 series repair ??
or should shield gas also
be applied. and hf or dc power be used?
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Chuck,
Argon gas shielding is the way to go on stainless.
solar flux paste is a mess.
DC electrode negative is the ticket.
you dont absolutely need hf high frequency start, but it helps.
high freq is great to have , but if you already have a tig machine with lift arc or scratch start, you can probably get by. unless its really thin stainless sheet.