On May 28, 4:34*pm, Bob Engelhardt wrote:
I am repairing an aluminum brake (i.e., a brake for bending aluminum
house flashing/cladding). *It is made of aluminum castings and
extrusions, held together with steel bolts and screws. *Every single
bolt/screw is corroded in place! *Not so much rusted as bound-up by
corrosion of the aluminum it's in. *AND ... all the screw are Phillips
head! &!@^&%^%$&*?!

Anyhow, I WILL get the screws out and when I put it back together I will
not use Phillips heads and I will coat them. *So, the question is: do I
coat them with anti-seize, or with anti-oxidant? *If anti-seize, does it
matter which form?

Thanks,
Bob

In my experience, anti-sieze is used on fasteners, anti-oxidant is
used between aluminum electrical components. I've used teflon pipe
dope, like the other poster, on steel fasteners going into aluminum
car components, it worked. It's a dielectric material, so keeps the
corrosion couple from forming, also excludes liquid and humidity,
which I think is what really does the trick. Probably could use
chewing gum or roofing tar and get the same effect.

Stan