Patent ID: 6162509
Filing Date: 2000-12-19
Classification: B05C,C23C

Abstract:
A method of fusing a self-fusing alloy thermal spray coating or a vitreous ceramic coating on a waterwall panel having a plurality of tubes interconnected by a plurality of membranes, using a movable induction coil assembly comprising the steps of:(a) heating at least some portions of at least one membrane and adjacent tubes of the waterwall panel, by induction, to a liquidus temperature of a self-fusing alloy thermal spray coating or a vitreous ceramic coating without significant warpage or adverse change in the microstructure of the material forming the waterwall panel by moving the induction coil assembly across the panel so that the induction coil assembly concentrates induction energy in at least one membrane; and(b) applying a self-fusing alloy thermal spray coating or a vitreous ceramic coating on the waterwall panel in such a way that the coating is fused at the portions of the panel heated pursuant to step (a).