Read our PCB engineers reply to a customer's query below.

Q: Looking to buy some flux from your company, if you could advise which flux is best for me. I am currently repairing pcb electronics, vehicle electrical parts like instrument clusters. The flux I currently use works well but if you revisit the pub after 1 or 2 months there's green residue over the area flux was used. It's eating away at the small resistors and is self damaging over time. Can you advise why this is happening and a suitable product from your shop that guarantees safe working with pcb electronics without the flux turning into green corrosive residue Iver to.e

A: Fluxes by their nature can be chemically aggressive which helps to remove oxidisation from metals which allows the solder to “Wet” the surface. It may be that the current flux being used is of the type which is recommended to be removed by chemically washing or ultrasonic cleaning. This is fine to use to achieve a good solder joint but

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