Categorized | Detergent 8, Electronic

Removing RMA Solder Flux

Q: We need to remove RMA solder flux on indium/lead soldered sub assemblies. Most aqueous cleaners attack this solder.

A: Generally speaking, indium lead solders are alkali resistant solders.  Rosin based RMA solder flux is best cleaned by alkaline/saponifying cleaners with no chelating agents, halides or conductive metal cations such as sodium. Our Alconox, Inc. cleaner, Detergent 8® Low-Foaming Ion-Free Detergent is a great choice.

The ion-free formulation also ensures safety when cleaning circuit boards or other electronics that could be short circuited by even the most minute amounts of residual ions.  Because Detergent 8 is cation free, it cannot leave conductive residues.

The organic amine in Detergent 8 cleaner forms a water soluble soap with the rosin. We recommend using a 3% Detergent 8 solution for ultrasonic immersion cleaning or a 5% Detergent 8 solution for manual cleaning of indium/lead soldered sub assemblies.

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Contact us any time: cleaning@alconox.com