Process for coating a metallic surface with a vitreous enamel

摘要

Metallic surfaces are coated with vitreous enamel by a process in which a cleaning pretreatment of the metal surface to remove surface oil is not required. An enamel-forming material is applied to metal surface coated with a polybutene as the surface oil. The thus-coated metal surface is fired at a temperature sufficiently high to cause the enamel-forming material to form a vitreous enamel coating. The preferred method for applying the enamel-forming material is electrostatic deposition.