Abstract: In recent years, high sulfur and high acid crude oil is widely used in refining device. The sulfur and acid substances in crude oil are extremely corrosive, causing huge security risks to the normal operation of equipment. In this paper, the ultrasonic thickness measurement, macroscopic examination and other means of a set of atmospheric and vacuum unit conducted a comprehensive corrosion inspection. Combined with the scene photographs of the corrosion morphology of gray scale analysis, corrosion scale samples for component analysis can accurately and clearly understand the influencing factors of corrosion occurrence and development. The corrosion rate and the remaining service life of the device in the corresponding position are calculated with the monitoring data of the site. Combined with the operation cycle of the device, the conclusions and suggestions related to corrosion protection are put forward.

Key words: Atmospheric and vacuum unit, Corrosion inspection, Corrosion analysis, Residual life

摘要： 近年来,高硫高酸原油在炼化装置中被广泛使用,原油中的硫、酸等物质具有极强的腐蚀性,给设备的正常工作造成了巨大的安全隐患。通过超声测厚、宏观检查等手段对某套常减压装置进行了全面的腐蚀检查,结合现场拍摄的腐蚀形貌照片进行灰色度分析、腐蚀垢样成分分析;准确清晰地了解腐蚀发生、发展的影响因素。结合现场检测监测数据,计算该装置相应位置的腐蚀速率及剩余使用寿命。结合装置的运行周期,给出结论及腐蚀防护相关建议。

关键词: 常减压装置, 腐蚀检查, 腐蚀分析, 剩余寿命