腐蚀过程电磁超声动态监测信号观察与分析  

Observation and analysis of electromagnetic ultrasonic dynamic monitoring signals in corrosion process

作　　者：薛菲 张宗健[2] 郑阳[2] 赵博[2] 甘勇[1] XUE Fei;ZHANG Zongjian;ZHENG Yang;ZHAO Bo;GAN Yong(School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541000,China;Key Laboratory of Nondestructive Testing and Evaluation for State Market Regulation,China Special Equipment Inspection and Research Institute,Beijing 100029,China)

机构地区：[1]桂林电子科技大学机电工程学院,广西桂林541000 [2]中国特种设备检测研究院无损检测与评价国家市场监管重点实验室,北京100029

出　　处：《压力容器》2022年第2期75-82,共8页Pressure Vessel Technology

基　　金：国家重点研发计划“公共安全风险防控与应急技术装备”重点专项项目(2018YFC0809002)。

摘　　要：为研究连续腐蚀过程中电磁超声监测信号的演化规律,搭建了加速腐蚀模拟实验装置,采用电磁超声换能器(Electromagnetic Acoustic Transducer,EMAT)对不同面积大小的腐蚀进行在线动态监测试验研究。结果表明,在动态监测过程中,相对于EMAT换能面积大小不同的腐蚀监测信号表现出不同的演化规律,同时腐蚀表面的状况和腐蚀产物的存在均会在不同程度上影响电磁超声监测信号的波形、幅值等特征,进一步分析提取EMAT连续监测的腐蚀特征信号,计算腐蚀深度,可以有效获取材料的腐蚀速率。In order to study the evolution of electromagnetic ultrasonic monitoring signals in the continuous corrosion process,an accelerated corrosion simulation experimental device was built,and EMAT(Electromagnetic Acoustic Transducer)was used to conduct online dynamic monitoring experimental research on corrosion of different areas.The results show that in the process of dynamic monitoring,the corrosion monitoring signals with different sizes of the EMAT transducer area show different evolution laws.At the same time,the condition of the corrosion surface and the existence of corrosion products will affect waveform,amplitude and other characteristics of the electromagnetic ultrasonic monitoring signal to different degrees.The corrosion characteristic signals continuously monitored by EMAT were further analyzed and extracted,and the corrosion depth was calculated,thereby the corrosion rate of the material can be effectively obtained.

关 键 词：电磁超声 腐蚀监测 监测信号 无损检测 

分 类 号：TH878.3[机械工程—仪器科学与技术] TG174.3[机械工程—精密仪器及机械]