基于温度补偿的电阻探针腐蚀监测原理的研究  

STUDY ON PRINCIPLE OF ELECTRICAL RESISTANCE PROBE BASED ON-TEMPERATURE COMPENSATION FOR CORROSION MONITORING

作　　者：柏任流[1] 董泽华[1] 郭兴蓬[1] 杨全安[2] 李琼玮[2] 李明星[2] 

机构地区：[1]华中科技大学化学系与化工系 [2]中石油长庆油田分公司油气工艺研究院,西安710021

出　　处：《腐蚀科学与防护技术》2007年第5期338-341,共4页Corrosion Science and Protection Technology

摘　　要：基于温度补偿的原理,对引起电阻探针腐蚀监测数据波动的关键因素进行了大量研究和分析,发现异种金属间的接触电势和温差电势差,是造成测量数据温度漂移的主要原因.文中通过特殊的电路设计,采用交变激励源对温漂效应进行补偿,极大降低了电阻探针内部接触电势产生的温差效应,使腐蚀速率的测量精度显著提高.现场和实验室测量表明:其电阻分辨率可达到0.5μΩ,腐蚀速率灵敏度达到了0.1μm/a.This paper studies and analyses the key factors which induce fluctuation of corrosion data measured by electrical resistance probe based on principle of temperature compensation, and it was found that the main factos are contact potential between different metals and differential temperature potential due to the temperature drift. The measurement accuracy of the corrosion rates is improved greatly according to the compensation of temperature drift through a specially designed AC drive circuit ,which eliminates the temperature difference caused by contact potential within electrical resistance probe. It is verified by field and lab test that the resistance resolution is 0. 5 μΩ and the measurement sensitivity of the corrosion rate is 0. 1 μm/a.

关 键 词：电阻探针 接触电势 温差电势 温度补偿 交变激励电路 

分 类 号：TG174.3[金属学及工艺—金属表面处理]