Cover Flux SP-II (Modifier)
Aluminum &, its alloys form a film of oxides during melting in open atmoSphere. The density of this oxide film is just the same as of Aluminum & its alloys. Hence they'are not readily separable and remain suspended in the melt which results in unsound casting and loss of precious metal.Thus prior to the casting of the metal, the removal of these suspended oxides from the melt is very much essential.
Cover fluxes when added to the melt, they form a protective cover over the melt and they curtail oxidation losses and minimize the hydrogen and carbon pickup. They also help in removing dirt and nonmetal ices and on skimming produce dross, low in metal content. There are various grades of Cover Fluxes, which are meant for different purposes.
Cover FLUX SP-II (Blue)
This is a modifying typeof flux for Aluminum-Silicon alloys at low melting temperatures. The charge is melted under COVER FLUX SP-I & after required temperature is attained, degassing has to be performed with DEGASSER-SP-I. Rabble the surface of the melt & skim off the dross cleanly. Now sprinkle COVER FLUX SP-II about 3% by weight of metal over the cleaned surface. As soon as the flux layer liquefies, work well into the melt for 3-4 minutes by using tools. Finally skim off the metal free dross and. pour the metal without delay.
Packing: 50 packets of 1 kg. Packed in 50 kgs. Double Polylined Hessian sacks, which is solid enough to withstand shakes and jolts of transportation.