Well, you can't use anything too acidic or basic (NaOH) for aluminum because it will just dissolve the piece. Also, if your aluminum part is too thin,
like foil, the ultrasonic cleaner can create holes in it due to cavitation. So, before putting anything important into the cleaner, I would suggest
testing it with scrap/ leftover aluminum.
For a basic cleaning solution, plain water might be sufficient for some amount of dirt. However, if the surface is especially greasy, adding a mild
soap can help dissolve the nonpolar substances. Nevertheless, be cautious as even this approach can potentially harm the aluminum
(micro-cavitations?).
Using a sponge/brush... and mild soap under running water might be the safest way to clean your parts.
I hope this helps. |