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Registered Member #65
Joined: Thu Feb 09 2006, 06:43AM
Location:
Posts: 1155
Has anyone tried a product that doesn't contaminate the lead-free wave soldering machines? Our manufacturer uses a Nitrogen gas shielding system, and mystery liquids...
It seems all google finds are resellers re-branding poorly documented "nontoxic" liquids that can't answer the most basic questions on how it will be affected by other solvents and glues.
Apparently this magic slime isn't a Silicone oil, but something that binds to the metal before it oxidizes.
Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
Have you tried dissolving it in water? Maybe it's just a very viscous water soluble flux, or it could be an organic acid like citric, malic, or tartaric acid? Those are cheap, non-toxic and easily sourced/easy to work with acids.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Pretty sure that a lot of them are basically acids. The idea is that by controlling pH with something like ZnCl any oxygen ends up here and heat catalyzes the reaction. Also relevant, the fluxes used for lead free are a *lot* more aggressive and account for many reports of "flaky" performance on finished projects. Protip here: UV light will make it glow like a rave floor if you didn't clean it up well enough.
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Molten Tin Solder oxidation control
