Zr-4 alloy is mainly used in the preparation of cladding tubes and positioning spacers in nuclear reactor fuel assemblies.The surface of zirconium alloy,which has been used in high temperature environment for a long time,will be corroded,which will affect the safety of ...MORE Zr-4 alloy is mainly used in the preparation of cladding tubes and positioning spacers in nuclear reactor fuel assemblies.The surface of zirconium alloy,which has been used in high temperature environment for a long time,will be corroded,which will affect the safety of cl...