Metals oxidation resistant

Hello All ! ! Thank you all for sharing these vital .

It is really wonderful to be a part of this intellectually
stimulating community. I would really appreciate if some enlightened
soul would care to shed light on the different
chemicals/compounds/compositions/formulations available which would
act as oxidation resistant/ reducing fluxes for Silver/Gold
Alloys/Nickel silvers besides Boric Acid and Borax.

I hope this post not too confusing or complex. Thanks a lot in
advance. Nilesh