烧碱降膜蒸发器镍管的泄漏原因  

Leakage Causes of Nickel Tube Used in Caustic Soda Falling Film Evaporator

作　　者：张腾中 李永友 张琦 刘海定 王东哲 张健 ZHANG Tengzhong;LI Yongyou;ZHANG Qi;LIU Haiding;WANG Dongzhe;ZHANG Jian(Chongqing Materials Research Institute Co.,Ltd.,Chongqing 400707,China;National Instrument Functional Materials Engineering Technology Research Center,Chongqing 400707,China;Chongqing Key Laboratory of Corrosion-Resistant Alloys,Chongqing 400707,China;Chongqing Bozhang Mechanical&Electrical Equipment Co.,Ltd.,Chongqing 400030,China)

机构地区：[1]重庆材料研究院有限公司,重庆400707 [2]国家仪表功能材料工程技术研究中心,重庆400707 [3]耐腐蚀合金重庆市重点实验室,重庆400707 [4]重庆博张机电设备有限公司,重庆400030

出　　处：《腐蚀与防护》2025年第2期116-121,共6页Corrosion & Protection

基　　金：重庆英才-创新领军人才(CQYC20210305170);国机集团青年科技基金(QNJJ-ZD-2023-03)。

摘　　要：采用光学显微镜、扫描电镜和电子探针等分析手段,对某化工厂烧碱蒸发器降膜镍管的泄漏原因进行了研究。结果表明:原料碱液中NaCOl_(3)杂质分解产生氧引起的化学腐蚀和碱液液膜分布不均匀产生的冲刷磨损是造成泄漏的主要原因。The causes of leakage of falling film nickel tubes of caustic soda evaporator in a chemical plant were studied by means of optical microscope,scanning electron microscope and electron probe.The results showed that the main causes of leakage were chemical corrosion caused by oxygen from the decomposition of NaClO3 impurity in the raw lye,and erosion and wear caused by uneven distribution of lye liquid film.

关 键 词：烧碱 降膜蒸发器 镍管 腐蚀失效 

分 类 号：TG172[金属学及工艺—金属表面处理]