PTA装置溶剂脱水塔再沸器换热管腐蚀穿孔失效分析  

Analysis on the Failure of the Tube Corrosion of Dehydration Column Reboiler

作　　者：蒋维宏[1] 

机构地区：[1]中国石化仪征化纤股份有限公司PTA生产中心,江苏仪征211900

出　　处：《压力容器》2012年第6期74-79,13,共7页Pressure Vessel Technology

摘　　要：介绍了PTA装置溶剂脱水塔再沸器E1-602换热管腐蚀情况,通过宏观和低倍分析、材质成分分析、金相分析与硬度测试和扫描电镜分析等方法,分析换热管腐蚀失效的原因、腐蚀发生形态,并从中得到经验教训,为今后如何进行选材以减缓腐蚀提供参考。The corrosion of PTA device solvent dehydration tower reboiler E1 -602 tube heat exchanger was introduced. Through a variety of methods for the analysis of the heat exchanger tube failure causes and corrosion morphology such as：macroscopic and low - magnification analysis, chemical composition analy- sis, metallographic analysis, hardness test, scanning electron microscope analysis, experience and lesson had been gotten which is useful to select material with less corrosion in 1he future.

关 键 词：PTA 腐蚀坑 裂纹 点蚀 

分 类 号：TH137.8[机械工程—机械制造及自动化] TQ050.9[化学工程]