HAl77-2铜合金管在低温多效海水淡化装置中的耐蚀性  

Corrosion Resistance Analysis of HAl77-2 Copper Alloy Tubes in Low Temperature Muti-effect Desalination Device for Seawater

作　　者：张建丽 朱力华[2] 王大鹏[2] 高立新[2] 张大全[2] 

机构地区：[1]神华国华(北京)电力研究院有限公司,北京100069 [2]上海电力学院环境与化学工程学院,上海200090

出　　处：《腐蚀与防护》2016年第6期484-489,共6页Corrosion & Protection

基　　金：上海市产业化标准项目(14DZ0500700)

摘　　要：采用实验室模拟研究的方法,通过腐蚀电化学测试和腐蚀形貌观察,借助表面物相结构和元素成分分析,比较了3种海水淡化所用的HAl77-2铜合金热交换管的耐蚀性以及平均晶粒度,分析了它们在海水介质中的腐蚀失效机制。结果表明:HAl77-2铜合金管的电化学阻抗均随浸泡时间的延长而逐渐增大,在达到极大值后,又会出现在极大值附近波动的现象;相比较而言,1号管样的耐蚀性最好、晶粒度最小,而3号管样的耐蚀性最差、晶粒度最大。The performance of three kinds of HA177-2 copper alloy tubes from different companies was studied by the simulative seawater corrosion experiment. The electrochemical impedance spectroscopy （EIS） and the potentiodynamic polarization curve method were used to investigate their corrosion resistance. The surface morphology after the simulated corrosion test was examined by scanning electron microscopy （SEM）. Mean grain sizes of three kinds of copper alloy tubes were calculated. The results show that the electrochemical impedance of the HA177-2 copper alloy tubes increased with the immersion time until a maximum, and then fluctuated around the maximum. In comparison, the 1# tube had the best corrosion resistance with the greatest mean grain size, and the 3# tube had the worst corrosion resistance with the least mean grain size.

关 键 词：低温多效净化 HAl77-2铜合金管 海水淡化 耐蚀性 

分 类 号：TG172.5[金属学及工艺—金属表面处理]