对某输油站5 000 m3原油储罐采用PAC SAMOS-32检测系统进行底板声发射在线检测，对声发射检测信号进行分析处理，经滤波、聚类、选取等方式去除干扰，依据单位时间内有效的事件数及事件的平均能量得到储罐底板的腐蚀状况。然后，对储罐进行开罐验证，通过常规无损检测方式得到储罐底板的真实腐蚀状况。经对比研究，二者对罐底板腐蚀程度检测结果在总体上具有较高的一致性，而在局部存在一定的偏差。对出现偏差的部位进行深入研究，分析总结出了存在偏差的原因，从侧面验证了声发射检测技术应用于储罐底板在线检测的可靠性。

Inservice inspection of oil products tank bottom is made by the theory of acoustic emission in-service with SAMOS-32 inspection system of PAC. Through filtering and clustering based on parameter analyzing, acoustic emission signal acquired is processed. Based on available events per unit time and average energy of the events, grade-evaluation of the corrosion information of tank bottom is carried out. Moreover, the corrosion information of tank bottom conld be obtained through conventional non-destructive testing methods when vertical tanks were shut down and the bottom plates are cleaned thoroughly. Comparative result shows that there is consistency in corrosion localizing accuracy in the two inspection methods, however there are some differences in local region. This paper hereby did some research on the corrosion of tank bottom and summarized several reasons of these differences. It more or less demonstrates the feasibility of acoustic emission in-service inspection technology for tank bottom corrosion detection.