Zirconium is well known and widely used in sulfuric acid containing processes where it is used in heat
exchangers, tanks, piping and other ancillary equipment. A considerable body of corrosion data has been
developed describing the use of zirconium for use in sulfuric acid environments. Virtually all of this
information, however, has been developed using zirconium in wrought form such as sheet and plate. Very little
information is available as to the corrosion characteristics of cast zirconium when used in applications involving
sulfuric acid in high concentrations and under high temperatures. In addition to wrought products, zirconium
pumps and valves are commonly specified in a cast product form of zirconium. This paper will provide
information related to the production using the rammed graphite method along. New corrosion data will be
given for Zr 702C. A new iso-corrosion diagram is presented comparing wrought Zr 702 vs. cast Zr 702 in
sulfuric acid.
KEYWORDS: Zirconium, Zr 702C, Zircadyne® 702, sulfuric acid, metallurgical, mechanical, safety, rammed graphite