Founded in 1940, Cleveland Black Oxide is one of the largest commercial black oxide companies in the United States. Based in Cleveland, Ohio, the company specializes in the processing of steel, stainless steel, copper, brass, bronze, die cast zinc and powdered metal parts. In addition, its expertise lies in black oxide conversion coating solutions for customers in a wide variety of industries. Cleveland Black Oxide is ISO 9001:2000 registered and processes over eight million pounds of carbon, alloy, as well as stainless steels each year. These include brass, bronze, copper; cast zinc and cast iron.