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摘要：预应力钢筒混凝土管（pccp）在国内的供水工程中已得到了广泛认可，应用越来越多，南水北调北京段就采用了dn4000mm的pccp管。为防止pccp管中钢质结构（钢筒和预应力钢丝）的腐蚀，国外对pccp管道采用了阴极保护技术，成功克服了pccp管的腐蚀，延长了pccp管的使用寿命。介绍了利比亚“大人工河”及国际上几个工程中pccp管道的防腐蚀做法，分析了造成pccp管腐蚀的机理和应采用的防护方法和标准；并针对南水北调北京段pccp管的