These components themselves are extremely polar and ionic and can even improve the dendrite and/or ECM mechanism if not removed. In addition, corrosion preventatives and surfactants are commonly employed in these merchandise. This is not a bad factor in itself, but care must be taken to ensure they’re removed along with the soils during the cleaning course of. The most common way to clear flux residues from a restore space is to saturate a cotton or foam swab with isopropyl alcohol or one other cleaning solvent, and rub it across the restore space. While this can be enough for no-clean flux, the place the aim is a visually clear PCB, this is most likely not clear enough when more closely activated fluxes are concerned, like RA or aqueous. The soiled little secret is that flux residues won’t evaporate along with the solvent.

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