用于环境腐蚀监测的挂片型电阻探针

doi:10.3969/j.issn.1007-2861.2104.01.030

上海大学学报(自然科学版) ›› 2015, Vol. 21 ›› Issue (1): 88-96.doi: 10.3969/j.issn.1007-2861.2104.01.030

用于环境腐蚀监测的挂片型电阻探针

冯蓓1,2, 翁永基1,3, 李相怡1,3, 李俊豪1, 焦正2

1. 上海中涌防腐蚀技术有限公司, 上海 201807; 2. 上海大学环境与化学工程学院, 上海 200444; 3. 中国石油大学(北京) 理学院, 北京 102200

收稿日期:2013-12-02 出版日期:2015-02-28 发布日期:2015-02-28
通讯作者: 翁永基(1945—), 男, 教授, 研究方向为材料腐蚀与防护. E-mail:weng_yj@139.com
基金资助:
张江专项发展基金资助项目(201209-JD-B1-016)

A novel coupon-type electrical resistance probe for environmental corrosion monitoring

FENG Bei1,2, WENG Yong-ji1,3, LI Xiang-yi1,3, LI Jun-hao1, JIAO Zheng2

1. Shanghai Zhongyong Anticorrosion Technology Co. Ltd., Shanghai 201807, China; 2. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China; 3. College of Science, China University of Petroleum, Beijing, Beijing 102200, China

Received:2013-12-02 Online:2015-02-28 Published:2015-02-28

摘要/Abstract

摘要： 设计了一种含4个试片的电阻(electrical resistance, ER)探针, 其中2片暴露在腐蚀环境中, 2片密封在环氧树脂中作为对照组, 用于快速分析环境平均腐蚀速度和偏差. 为消除温度对测量结果的影响, 引入了腐蚀指数P 的概念, 根据P-t曲线计算出特定时段的平均腐蚀速度; 根据P-R_x (腐蚀电阻)曲线确定探针检测厚度变化的灵敏度. 讨论了引线电阻和点蚀系数对测量结果的影响. 对2个对照电阻比值作了统计分析以确定异常波动性, 作为探针密封性损坏的报警依据. 通过与失重实验相对照, 结果表明该电阻探针能提供十分相近的腐蚀速度, 可用于环境腐蚀性的快速评定.

关键词: 电阻探针, 环境腐蚀性, 碳钢挂片

Abstract: A novel electrical resistance (ER) probe is designed. It includes 4 coupons, 2 of them exposed in a corrosion environment and 2 sealed in epoxy for monitoring the environmental corrosion rates and deviations. A corrosion index P is introduced to eliminate the temperature influence. The mean corrosion rates within individual periods of time are calculated based on the P-t curves. The probe’s sensitivity in thickness is determined based on the P-R_x(corroded coupon’s resistance) curves. In addition, the influences of output line resistance and the pitting factors on the measure errors are investigated. Ratios of two contrast resistances are analyzed with a statistical method to determine the unusual fluctuation, and used as an index for sealing damage alarm. Comparison with weightlessness experiments shows that this kind of ER probes can offer approximately consistent results for quick estimation of the degree of environmental corrosion.

Key words: carbon steel coupon, electrical resistance (ER) probe, environmental corrosion

中图分类号:

TG 172.4

冯蓓1,2, 翁永基1,3, 李相怡1,3, 李俊豪1, 焦正2. 用于环境腐蚀监测的挂片型电阻探针[J]. 上海大学学报(自然科学版), 2015, 21(1): 88-96.

FENG Bei1,2, WENG Yong-ji1,3, LI Xiang-yi1,3, LI Jun-hao1, JIAO Zheng2. A novel coupon-type electrical resistance probe for environmental corrosion monitoring[J]. Journal of Shanghai University（Natural Science Edition）, 2015, 21(1): 88-96.

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用于环境腐蚀监测的挂片型电阻探针

A novel coupon-type electrical resistance probe for environmental corrosion monitoring

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