01.
Testing homemade fluxes
2019 Jun 13th

Testing homemade fluxes

In the last four articles (start here) I've gone through a lot of the technicalities of flux: what's in it, how it works, and how to make your own. Now, let's bring it together and try out all these experimental fluxes.What about the solder?The only solder I normally have on hand is MG Chemicals 4900. This is a lead-free Sn96 alloy with a built-in no-clean rosin flux. So to test my homema…

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02.
DIY no-clean-style flux
2019 Jun 6th

DIY no-clean-style flux

My two previous DIY solder flux formulations are both designed to be cleaned away after use, with alcohol or with water. In both cases the cleaning is more or less necessary: traditional resin leaves a sticky residue that will attract water, and the citric-acid water-wash flux remains active and corrosive at room temperature, so it will damage boards if left in place. But there are many so…

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03.
Make your own water-wash flux
2019 May 30th

Make your own water-wash flux

The current trends in electronics are to smaller and smaller surface-mount components; lead-free solder alloys and a diversity of surface platings; higher temperatures which mean soldering must be faster to avoid component damage; and avoiding toxic or environmentally-damaging cleaning solvents. All these trends make traditional solder fluxes, like the one in my last article, less effective…

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