PROCEDIMENTO PER LA REALIZZAZIONE DI RIVESTIMENTI PER ALTE TEMPERATURE SU METALLI E LEGHE METALLICHE

摘要

A process for forming a protective metal diffusion coating on a metal or metal alloy workpiece including internal cavity surfaces, comprises coating the workpiece with a slurry in acetone and cellulose acetate of a powder of average grain size of 0.5 mu to 10 mu , including aluminum and possibly chromium and/or a small quantity of cerium or yttrium hydride and heating the workpiece in a non-oxidizing environment to dissociate the hydride and effect diffusion of the metals into the surface of the workpiece.