Vitreous metal coating enamel compsn

摘要

Vitreous enamel for coating metals and alloys comprises SiO2 in wt.% 30-65, CaO 0.2-15, Al2O3 2-9, MgO 0-1, Va2O + K2O 12-25, B2O3 8-30, Fe2O3 0-0.5, BaO 0-5, Mu2O3 0-3 and specifically CuO 2.8-3.8 and F 2-9.