A dremel plus a small brass wire wheel might do the trick. I suspect that if you built a fixture to hold >25 crystals at a time in a vise that a suitably skilled and motivated person could clean up your crystals in very little time. (A strip of perfboard, a block of wood, and some bolts. Sandwich the crystals between the perfboard and the wood with the pins poking through the holes in the perfboard. Use threaded fasteners to hold it together. Then clamp the wood block in a vise and wire bush away. Rinse and repeat until finished) Alternatively, It is hard to say if the really nasty acid core fluxes would be suitable for electronic components. You'd probably have to clean them after. -Jason White On Sunday, March 3, 2019, Manu Abraham wrote: > Hi, > > I have this large bag of through-hole standard crystals, which have > their pins oxidized, since the bag was left open for a while and thus > solderability is a big issue. > > The crystals are good, just that time has to be spent scraping the > oxide of the pins which is a waste of time. > > Is there a better way to remove the oxide layer other than scraping, > probably by a chemical process or so ? > > Any thoughts ? > > Thanks, > Manu > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 Jason White --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .