Metal oxides such as silicon dioxide (SiO2), which is found in abundance in nature and is widely used in glass, tile, cement, industries etc., and aluminum oxide (Al2O3), which is extracted from corundum ore, both during the physical and chemical purification process is purified over 90% and during the process is converted to fumed silica and fumed alumina, respectively.

Joe Powder answers to reader’s questions on aspects of the powder coating process.