过热器化学清洗腐蚀在线监测技术研究  

On-line corrosion monitoring technology of chemical cleaning for superheaters

作　　者：张广文 刘锋[2] 倪瑞涛[2] 蔡井刚 邓宇强[2] 曹杰玉[2] 

机构地区：[1]神华国华(北京)电力研究院有限公司,北京100025 [2]西安热工研究院有限公司,陕西西安710032

出　　处：《热力发电》2013年第12期80-83,共4页Thermal Power Generation

摘　　要：根据过热器酸洗工程的特点,基于线性极化原理,开发出了腐蚀在线监测系统。该系统采用双电极体系,通过法兰接入系统,可在高温、高压的清洗介质中对线性极化电阻进行测量。选择T91钢作为试片材质,通过动态挂片试验验证腐蚀监测系统的可靠性。试验结果表明,腐蚀在线监测系统测得的试片腐蚀速率与通过挂片腐蚀失重法获得的腐蚀速率的误差率在±5%以内,说明该系统可准确监测出清洗过程中腐蚀监测试片的腐蚀情况。An on-line corrosion monitoring system was developed according to the actual characteristics of chemical cleaning and the principle of linear polarization.This system applies the twoelectrode system that connected to the system by flange,which can detect the linear polarization resistance in the cleaning medium with high temperature and high pressure.The T91steel was taken as the example to verify the reliability of the monitoring system through dynamic coupon test.The results show that,the corrosion rate detected by the on-ling monitoring system was close to that by the dynamic coupon test,with the error rate less than±10%,indicating the corrosion situation can be accurately detected by the above monitoring system during the acid cleaning process.

关 键 词：过热器 化学清洗 腐蚀速率 在线监测 线性极化 T91 

分 类 号：TM621.8[电气工程—电力系统及自动化]