MANUFACTURE OF ENAMELED SUBSTRATE

摘要

PURPOSE:To improve the adhesion of an enamel layer to a metallic core by making pits having a size more than specified times the average particle size of enamel in the metallic core. CONSTITUTION:Enamel, especially crystallized enamel is applied to a metallic core and baked to manufacture an enameled substrate. At this time, the surface of the metallic core is roughened by making pits having a size 1/4-20 times the average particle size of the enamel with a mixed acid contg. sulfuric acid and nitric acid as a roughening soln.