Salt Bath Nitriding

This chapter presents the salts used and the process advantages of salt bath nitriding. It discusses the types of salt bath nitriding processes, such as preheating, immersion into the molten salt bath, cooling in still air or a suitable quench medium, postwashing, and optional polishing or oiling. The chapter provides a discussion on salt bath nitriding equipment and procedure. It describes the materials and equipment, analysis procedure, and determination of sodium carbonate and sodium cyanate for titration testing of the nitriding salt bath. The chapter explains the procedures for maintenance of the salt bath and related equipment. It also discusses safety precautions and design parameters for furnace equipment.