Ceramic Coatings For Use At High Temperatures

Vitreous enamellers, in common with other metal finishers, are well aware of the need to protect metals, particularly those of the ferrous group, against corrosion. It is likewise well known that any rise in temperature of unprotected metal parts greatly accelerates the rate of attack, be it by oxidation, corrosive liquid or corrosive atmosphere. The vitreous-enamel and plating industries particularly have been meeting this problem of metal protection at elevated temperature for quite some time past. This paper looks at the steps taken by the US National Bureau of Standards, who have undertaken a number of projects in the development of high temperature coatings.