国产海水淡化装置铝黄铜换热管腐蚀调查分析  

Corrosion Analyses of Aluminum Brass Tube Heat Exchanger in Homemade Equipment for Seawater Desalination

作　　者：李超[1,2] 张建丽 黄桂桥[1,2] 张波[1,2] 吴恒[1,2] 

机构地区：[1]青岛钢研纳克检测防护技术有限公司,山东青岛266071 [2]钢铁研究总院青岛海洋腐蚀研究所,山东青岛266071 [3]神华国华(北京)电力研究院有限公司,北京100025

出　　处：《装备环境工程》2014年第3期105-109,共5页Equipment Environmental Engineering

摘　　要：目的了解国产万吨级LT-MED装置铝黄铜换热管的腐蚀情况。方法通过对设备现场调研和腐蚀产物分析,对换热管的腐蚀类型和腐蚀原因进行分析,并对其腐蚀的危害性进行判断。结果铝黄铜换热管在凝结水侧发生全面腐蚀和点蚀,在海水侧主要发生轻微脱锌腐蚀。结论铝黄铜换热管在凝结水中腐蚀率很低,其全面腐蚀可以接受。换热管在凝结水侧的点蚀轻微,可对其进行定期检测。铝黄铜在海水侧的脱锌腐蚀轻微,可以忽略。换热管腐蚀程度轻微,不影响水质和设备正常运行。Objective To understand the corrosion of aluminum brass tube heat exchanger in homemade 12 500 m3 ＆#183; d-1 LT-MED equipment for Seawater desalination. Methods Field research and analysis methods for corrosion products were used to analyze the types and causes of corrosion. And the dangers of corrosion were judged. Results Aluminum brass tube showed mainly general corrosion and pitting in fresh water condensate, while slight dezincification corrosion mainly oc-curred in seawater. Conclusion Aluminum brass tube had a very low corrosion rate in fresh water condensate, and its gen-eral corrosion was acceptable. For the pitting at the side of fresh water consendate, regular testing could be performed. The slight dezincification corrosion in seawater could be neglected. The slight corrosion of tube heat exchanger did not affect the＆amp;nbsp;water quality and the normal operation of equipment.

关 键 词：低温多效 海水淡化 HAl77-2 换热管 腐蚀 

分 类 号：TG172.5[金属学及工艺—金属表面处理]