Electronics > Repair
Ultrasonic cleaner size: 10L vs 6L
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SolderOcelot:
Flux is not my problem by the way. I solely use the ultrasonic cleaner for liquid damage (as in tap water touching electronics while they're powered on) and so to clean the white (iron?) and green oxidation (copper). I don't know if that makes a difference in the recipe. I guess water + saponifier + surfactant is still the way to go?
jpanhalt:
If it's oxidative damage to a metal, alcohols are not very good solvents for that.  Water + surfactant/detergent is better.  I wouldn't try to get too deeply into the chemistry.  There are basically two choices water-based and non-aqueous.  IPA and ethanol will both have some water, unless you use absolute versions or something like E85, which I do not recommended, but I would consider those alcohols as non-aqueous.  Glycol ethers that are in all of the aqueous flux removers have special solvent properties.  Using an aqueous flux remover is generally safe and a good cleaner even if flux residue isn't the issue.

There is nothing wrong with starting with IPA, though.
SolderOcelot:
@jpanhalt:
Interesting, for so long I believed in IPA being undisputed solution for this use case and it was possibly not true.

Out of curiosity.. Where did you gain this knowledge around solvents and cleaning? Was it something you picked up in hobbies or was it essential to your work?
jpanhalt:

--- Quote from: SolderOcelot on July 17, 2024, 12:50:52 pm ---@jpanhalt:
Out of curiosity.. Where did you gain this knowledge around solvents and cleaning? Was it something you picked up in hobbies or was it essential to your work?

--- End quote ---

Grad school plus decades of experience.  It wasn't necessary to my work, but as they say, you can take a chemist out of the lab but you can't take the lab out of a chemist.
SolderOcelot:

--- Quote from: jpanhalt on July 17, 2024, 01:11:29 pm ---but as they say, you can take a chemist out of the lab but you can't take the lab out of a chemist.

--- End quote ---
Of course not, that would be reverse entropy  :scared:
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