PTA加氢反应器内壁堆焊层腐蚀分析及修复

Corrosion Analysis and Repair of Overlay Claddingon Inner Wall of PTA Hydrogenation Reactor

分析在役PTA反应器内壁不锈钢堆焊层点蚀缺陷的成因,研究Br-(溴离子)、固相催化剂和冲刷腐蚀等对反应器内壁不锈钢堆焊层点蚀的影响。采用堆焊的方法对内壁堆焊层进行修复,通过工艺性试验及生产实践证明了堆焊方法可行。

The causes of pitting corrosion of stainless steel overlay cladding on inner wall of PTA reactor in service have been analyzed.The effects of Br-(bromide ion),solid phase catalyst and erosion corrosion on pitting corrosion of stainless steel overlay cladding on inner wall of PTA reactor have been studied.The build-up welding method has been used to repair overlay cladding on the inner wall,and the technology test and production practice proves that the build-up welding method is feasible.