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本文介绍的是近三年来三菱化工公司因腐蚀发生的设备故障情况.一、应力腐蚀的实际情况根据对345件设备故障的分析,腐蚀部分占33.6%,即由于腐蚀发生的设备故障约占1/3.按设备种类对116件腐蚀故障的分析,管道占39.7%,热交换器占21.5%,塔类占14.7%,贮槽类占7.7%,其他设备占16.4%.可以看出,管道所占比重最大.按故障形态对116件腐蚀故障分析,全面腐蚀占39.7%,局部腐蚀占18.1%,侵蚀(酸蚀,水点腐蚀)占11.2%,应力腐蚀裂纹占4.3%,其他占26.7%.从以上分析结果可以看出,因应力腐蚀破裂发生的故障件数虽不很多,但是,一般说来对全面腐蚀等的腐蚀
This article describes the Mitsubishi Chemical Company in the past three years due to corrosion of equipment failure situation.First, the actual situation of stress corrosion According to the analysis of 345 pieces of equipment failure, the corrosion part accounted for 33.6%, that is, due to corrosion of equipment failure accounted for about 1 / 3. Analysis of 116 corroded failures by equipment type, with pipes accounting for 39.7%, heat exchangers accounting for 21.5%, towers accounting for 14.7%, tanks accounting for 7.7% and other equipment accounting for 16.4%. It can be seen that the pipe According to the fault morphology, 116 cases of corrosion failure analysis, total corrosion accounted for 39.7%, local corrosion accounted for 18.1%, erosion (acid corrosion, water point corrosion) accounted for 11.2%, stress corrosion cracking accounted for 4.3%, other accounted for 26.7 %. As can be seen from the above analysis results, due to stress corrosion cracking occurred in the number of failures is not much, but generally speaking, the corrosion of complete corrosion