摘要
EO反应器是环氧乙烷/乙二醇联产生产装置中的核心设备。在扬子石化环氧乙烷反应系统改造项目中,该设备首次实现国产化,反应器筒体材料采用13MnNiMoR高强度钢。为了解筒体材料在工作介质中的腐蚀性能,对EO反应器筒体用13MnNiMoR钢焊接接头各区金属进行金相分析,在工作介质锅炉水中进行电化学腐蚀试验。结果表明,EO反应器筒体材料13MnNiMoR钢焊接接头各区金属在工作介质中的腐蚀电位和极化曲线存在一定差异,各区金属的耐蚀性与其组织结构密切相关,在相同的试验溶液中,热影响区总表现出最大的腐蚀电流,焊缝金属次之,母材最小。
EO-reactor is the core equipment in the EO/EG multiple product processing.It has been homemade firstly in the modification item of YPC EO reacting system.The cylinder material of the reactor is high strength steel of 13MnNiMoR.To understand the corrosion properties of EO-reactor cylinder material in the working medium,the microstructures of 13MnNiMoR weldment and the electrochemistry corrosion tests which are concerned on different zone metal of 13MnNiMoR steel weldment have been done in the boiler water.The test results indicate that values of Ecorr and the polarization curves of 13MnNiMoR weldment are different.The resistance of different zone metal in weldment is tightly connected with their microstructure.In the same testing solution,heat-affected zone always shows the max corrosion current density.Those of base metal are the minimum.
出处
《电焊机》
北大核心
2011年第4期76-80,共5页
Electric Welding Machine
基金
中石化集团公司重大装备国产化项目--扬子石化180kt/a环氧乙烷反应系统改造项目
