Hi Everyone,
After flipping through my old engineering textbooks, I thought I'd ask you guys for a quick and dirty practical answer.
I have two pieces of cast aluminum with mating machined threads. They've been together for 49 years, in a damp environment, and now they're seized into each other. Alloys are unknown. Penetrating oil, heat, pounding, and very long "persuaders" have been attempted.
Unfortunately, they have to come apart to service a bearing. I'm unwilling to cut either piece because they're going to be very hard to replace.
Application? 1954 Maytag washing machine that I'm restoring. (It's a family heirloom now...)
Anyone know of any chemicals (preferably household) which will penetrate small cracks and dissolve aluminum oxide? Any galvanic methods (I have large high-current DC power supplies)?
Thanks for any suggestions, advice or commiseration.
Lawrence Wade