THE SODIUM HYDRIDE PROCESS for Descaling Metals

The rapidly expanding use of highly alloyed metals, such as stainless steels and special heat‐resisting alloys, and their fabrication by deep stamping, spinning and welding, with the annealing and stress‐relieving treatments essential to these processes, have called for an entirely new outlook on methods of scale removal. From both the economic and the dimensional points of view, it is essential to minimise metal losses in all stages of manufacture, and this is achieved with the non‐electrolytic sodium hydride process, here described.