The crystallizer, which is the key component of metallurgical equipment continuous casting technology, is mostly made of high-tensile and high-thermal-conductivity copper alloys like chromium copper alloy and silver-copper alloy. Petrochemical industrial copper and many copper alloys are mostly used to produce various containers, piping systems, filters, pumps and valves, evaporators, heat exchangers and condensers which often contact with the corrosive media.