IMPROVED METHOD FOR DIFFUSION COATING OF METAL OBJECTS

摘要

An improved method of diffusion coating a workpiece, such as ferritic tubing employing a ceramic carrier provided with a diffusion composition. Th e diffusion composition includes a diffusion element such as chromium, silicon , aluminum, and boron. The carrier is subjected to an elevated diffusion temperature in a controlled environment to diffusion coat either the externa l of internal surface of the workpiece.