The effect of CoO and NiO on the adherence between enamel coating and steel is being investigated experimentally in this study. Enamel coatings are applied to the steel using a wet process with slurries. A total fo five enamels were prepared including three single layer enamels: blank enamel; NiO bearing enamel; CoO bearing enamel; and two double layer enamels - BL-MTNi3, BL-MTCo3, which consisted an inner layer of BL and an outer layer of MTNi3 or MTCo3. Falling-weights test were performed and the cross-sections at the enamel/steel interface were analysed with SEM coupled with an energy dispersive spectroscopy (EDS) and electron probe micro-analysis. Results show that the increases of adherence for MTCo3 and MTNi3 coated steel are attributed to the micro-alloys precipitation at the enamel/steel interface.
