Restoring and protection of the low temperature solder from oxidation

Abstract

The analyzes of methods and composition of solder protection from oxidation has been carried out. A more perfect composition for the restoring and protection of the melt of low-temperature solder from oxidation on the basis of fluxing components: glycerin; urea; nano-dispersed carbon and filler (silicon dioxide powder) has been developed.The advantage of the developed composition (material) is an increase in operating time (from 2-3 to 300 hours). Unlike the protective fluids based on glycerol with sodium hydroxide salts, or hardening oils, the operation temperature range increases to 447 K - 723 K, the cleaning and removal of the remains of the protective composition improves. High dispersion of SiO2 (5-15 microns) and highly developed surface (5-150 m2 /g) of technical carbon lead to increase the strength and reduced the porosity of the protective layer, which prevents the evaporation of heavy (toxic) metals in the solder composition.The developed material is tested in the technology of assembly and installation of radio electronic products by soldering method and can be used for low-temperature soldering and tinning conductors by the low-melting solders, as well as electric outlets, radio elements and units of electronic equipment (EE).