Channing,
I'm thinking that you just take some thick (1/8" or more) solid wire solder and cut 2" long pieces and put them in jars/testtubes of the juice of choice and either let them go for a year or two or heat for accelerated reaction (common test in the lube and other industries for reactive tests). After the exposure time of choice, pull the samples and bend them over a sharp corner in a consistant manner to see what happens. Save samples that were not exposed and do the same for baseline. Eval the surfaces for corrosion as well. I figure a yr or two is all that's needed for a test along with every solvent you might use...off hand a couple Hoppes types, a few Shooter's Choice types, Gunslick, maybe some others and you may as well toss in Breakfree and a few other lubes. A tensile test would be better but I think bending will show any significant weakening in tensile strength.
