To sum up the effect of chlorion corrosion on the process equipments and index in Bayer process alumina production,and analyse the main reasons of equipments unefficient caused by chlorion corrosion.

综法产氧化铝过程中氯离子对工艺指标及产备腐蚀的影响，分析了有氯离子存在时备腐蚀失效的主要原因。