Study of the effect of Co2O3 and CuO additives on ground enamel obtained in the SiO2–Al2O3–Na2O–K2O–CaO–B2O3–NiO system

The purpose of this work is to study the effect of Co₂O₃ and CuO additives on the adhesion of ground coatings obtained in the SiO₂–Al₂O₃–Na₂O–K₂O–CaO–B₂O₃–NiO system. To achieve this goal, glasses were synthesized in the SiO₂–Al₂O₃–Na₂O–K₂O–CaO–B₂O₃–NiO system based on local raw materials with the addition of Co₂O₃ and CuO. Ground enamels based on these glasses were obtained and their properties were studied. The obtained data show that the most important influence on the adhesion to the steel surface is exerted by copper, nickel and cobalt oxides. The conclusion is made about the predominant effect of copper oxide on the bond strength and about the positive effect of the combined presence of copper and cobalt oxides