All flux has acid so yes u can as long as u wipe it clean after u solder it will cause Ur joint to turn green
Emery cloth and non acid type flux
Make sure the soldering copper (tip) is clean and free of oxidation add some type of non acid flux and do not over heat
Hi Wikki We struggle to avoid copper from getting rust after we do soldering over that with using flux, plz help...Navin
Flux is used to keep metals from oxidizing. Solder will not bond well with copper-oxides which are formed when copper is exposed to high temperatures (ie a soldering iron) the flux prevents the oxidation. If you were to solder without flux the solder joint would be weak and possibly completely nonconductive.
Copper colored solder can be found at http://www.beadmeus.com/coppercolorsolder.aspx the flux is included in the soldering rod.
Flux helps promote soldering. Soldering paste might contain flux and other items to help promote soldering. The paste helps hold the flux in place while beginning to solder.
It is used to clean impurities away from the surface to be soldered or brazed. Many times it is included in the flux. The use of acid type of fluxes is actually detrimental to good plumbing , soldering practices because if the flux is not properly cleaned the joint will eat away from the corrosive action of the acid
To prevent oxidation and allow the alloy to flow into the fitting capillary action (attraction) and it is best to use a non acid flux and if one knows how to braze they can braze joints with a tensile strength of 87,000 PSI without the use of flux PROVIDING you use the correct rod as per AWS
After cleaning copper pipe and fitting, applying flux helps ensure that solder will adhere to pipe and fitting when joint is heated to proper temperature.AnswerIt depends on what type of 'flux' you are talking about? For example, 'electric flux' and 'magnetic flux' exists naturally, and is not 'for' anything in particular, although it can be made use of.
Flux is used to prevent oxidation while soldering wires and components in electronics.
The materials being soldered.
A: The pad is not clean it has tarnish or wrong solder with not enough soldering flux. Finally not enough heat.