neutralizing aluminum gas welding flux
Specifically to the question about neutralizing AGW flux in hard-to-reach areas - I use a 25% phosphoric with either a brush or a pump spray.
(Must for Rust has been my go-to for many years)
It will etch steel and aluminum, so I wipe it quickly before it dulls any polished areas. It helps bond primer coats, also - when wiped dry.
I also use it to rinse aluminum fuel tanks that have been gas welded, as a standard shop routine.
-end-
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Kent
http://www.tinmantech.com
"All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919.
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