Clean surfaces to be soldered by removing all rust, grease, dirt, paint, etc. Cleaning can be done with steel wool, sand paper, etc. Heat parts to be soldered with a soldering iron or torch, so that the acid core solder, when fed to the heated joint, will melt. Remove solder, then the heat source. Allow to cool and remove any flux residue with a warm, damp cloth.
For repair of electronic components and circuit boards 63 percent alloy, 37 percent lead solder with rosin flux core 361 Fahrenheit melting point 0.50 Oz. size.
This lead free 16 oz plumbing solder that is easy to use for copper tubing and supply lines for drinking water systems, silver bearing alloy with melting point: 430 degree F, convenient to use wire form.
This highly active inorganic acid type of flux developed for general-purpose soldering applications where a flux-cored solder wire is desirable. Rapid soldering can be accomplished on all common metals except aluminum and manganese. Acid flux is particularly useful for soldering excessively oxidized metals.