在线腐蚀监检测器的研究与应用

Research and Development of On-line Corrosion Detector and Application

对常用的腐蚀监测方法———实验室腐蚀试验、现场设备挂片、电阻探针技术、超声波测厚技术进行了比较,指出了这些技术的优点和缺点。介绍了根据设备、管道的具体结构、材质、壁厚情况而设计研制的在线腐蚀监检测器的情况。它具有现场安装拆卸操作方便和试样易于挂置摘取的特点。根据需要摘取了在线腐蚀监检测器中挂置周期为61～115 d的试样,对试样表面的宏观和微观腐蚀形貌进行了观察分析,计算出高低温部位不同材质挂片的腐蚀速率。在腐蚀监检测器中安装了探针,实现了实时在线式腐蚀监测,并对腐蚀监检测器采用定点测厚技术检测,获得的全面检测实验数据及分析结果,对中国石油化工股份有限公司塔河分公司的设备检修、选材以及及时调整防腐蚀措施,有一定的参考价值和指导作用。

The common corrosion detection methods such as laboratory corrosion testing, site coupon testing, electric resistance probe analysis and ultrasonic paehometer testing are compared and their respective advantages and disadvantages are discussed. The research and development of on - line corrosion detectors based upon the specific structure, metallurgy and wall thickness of equipment and pipelines are described. The detectors are easy in installation, operation and removal. The coupons which were installed in the on -line corrosion detector for 61 - 115 days have been removed, the micro and macro corrosion forms of the coupons were analyzed and the corrosion rate of coupons of different metallurgy at high - temperature and low - temperature locations were summarized. In addition, the installation of probe in the corrosion detector has realized the real - time on - line corrosion monitoring. With the help of pachometer testing at the determined points, complete valuable data have been produced and analyzed, which provide a good basis and reference for equipment maintenance, material selection and selection of effective corrosion protection measures, etc.