zirconium target
As a result of its exceptional corrosion resistance, zirconium target is used extensively in the chemical industry in corrosive environments. With a very low neutron absorption capability, it serves well as the inner lining of reactors in nuclear submarines and power plants. Zirconium target also used as to make surgical instruments and is used in steel alloys as a hardening agent.
http://www.hexonmetal.com/zirc....onium-targets-c-1_6.