Abstract
We have analysed the chemical components of sixteen commercial soldering fluxes using atomic absorption spectroscopy, spectrophotometry and X-ray diffractometry.We have examined the weight change in the fluxes with a thermobalance apparatus.The major elements were K, B, F in all fluxes and Na was a minor element.Small amounts of Al, Si, Cl were detected in three fluxes.Decrease in weight with the heating of the flux was probably a result of dehydration and evolution of CO2.We have identified some of the chemical compounds such as KBF4, KF, KCl, K2CO3, KHCO3, K2B4O7・4H2O, KB5O8・4H2O, K2[B3O3(OH)F4], K2SiF6, Na2B4O7・5H2O, H3BO3 in fluxes.One of the fluxes was amorphous.In conclusion, we found that commercial soldering fluxes consist of same limited number of elements and contain some materials well-known as chemical components of fluxes.
