Miscellaneous Forming Techniques

Porcelain enamel coatings are glass coatings applied to metallic base materials. The process involves refusing powdered glass into a continuous layer on metal surfaces. The glass coatings adhere to oxide layers that develop from the base metal during the firing operation. The coefficient of thermal expansion of the porcelain enamel is slightly lower than that of the metal; this ensures that the coating will be in compression at room temperature.