Abstract: A non-cyanide molten salt bath composition and process for the carburization of objects made of ferrous metals or alloys are provided. The composition comprises a molten salt mixture, at a temperature in the range of 900.degree. C. to 1050.degree. C., of an alkali metal chloride or a mixture of alkali metal chlorides; an activator consisting of an oxygen containing strontium or barium salt; and a graphite cover. The process comprises immersing the ferrous metal or alloy part in the molten mixture at a temperature in the range of 900.degree. C. to 1050.degree. C.

Abstract: Microcrystalline zinc phosphate coatings and compositions for their formation are provided, which can be applied to metals at low temperatures, the coating compositions containing as principal ingredients a specific balance of calcium and zinc together with phosphates, nitrates, and nitrites. Processes for preparing and using the coating compositions are also provided.