REPRODUCIBILITY OF THE CONTACT ANGLE OF ENAMEL ON STEEL SUBSTRATE

Good wettability of steel by enamel melts is an important requirement for obtaining a high quality coating. The reproducibility of the contact angle of barium borosilicate glass on a steel substrate as a function of the method of preparation of the glass specimens was investigated. The contact angle was determined by the sessile drop method at 750, 760, 770, and 790 C. The scattering of contact angle values was minimal when glass drops with a fixed weight (150 mg) were prepared by preliminary fusion of