为实现管道内壁腐蚀的全周向在线监测并提高测量精度，在传统电阻法的基础上提出一种基于双环电阻探针的腐蚀监测方法。双环电阻探针解决了由于几何限制和管道内外壁温差所带来的测量误差。通过对双环探针进行多象限分区，求解各分区的电阻比值，实现了管道全方位的在线腐蚀监测。通过双环探针可以同时实现对管道内外壁的温差计算与实时监测，为湿蒸汽管道冷凝液膜的形成起到预报作用。基于以上研究基础，在实验室X65模拟管路中，分别布置四象限分区双环电阻传感器、传统丝状电阻传感器和高精度热电偶对管道的腐蚀和内外壁温差进行实时监测。试验结果表明：基于新型双环探针的管道内壁腐蚀监测方法，可以完成管道内外壁温差和局部分区腐蚀状态的在线监测，并在腐蚀深度和腐蚀速率的测量上比传统丝状电阻探针具有更高的监测精度。
黄一
,
徐云泽
,
王晓娜
,
李小龙
,
涂三山
. 基于双环电阻传感器的管道内壁腐蚀监测技术研究[J]. 机械工程学报, 2015
, 51(24)
: 15
-23
.
DOI: 10.3901/JME.2015.24.015
To realize the pipeline whole circumference inner corrosion on-line monitoring and promote the measurement accuracy, a new method based on the traditional electrical resistance(ER) approach is developed for corrosion monitoring on account of the new type ring pair ER probe. The measuring error produced by the geometry restriction and temperature difference can be solved through the ring pair probe. Through the set of multi segments on the circumference of the ring pair and the calculation of resistance ratio of each segment, the pipeline whole direct on-line corrosion monitoring is realized. The temperature difference between the inner pipe wall and outer pipe wall can also be calculated and monitored through the ring pair method. The formation of the condensate liquid film in the vapor transportation pipeline can be forecasted. Based on the research, a four quadrants ring pair sensor, traditional wire ER sensor and high accuracy thermocouples are arranged into the X65 pipeline which is placed in the laboratory to monitor the pipeline inner corrosion and the temperature difference between the inner and outer pipe wall. The results shows that the method which uses the new type ring pair ER probe can measure the temperature difference between the inner and outer pipe wall. And through the comparison with the corrosion coupon, it is found that the ring pair ER sensor had high measurement accuracy on the corrosion depth and corrosion rate than the traditional wire ER sensor.
[1] 杨列太. 腐蚀监测技术[M]. 北京：化学工业出版社, 2011.YANG Lietai. Techniques for corrosion monitoring[M]. Beijing：Chemical Industry Press, 2011.
[2] PROSEK T, BOZEC N L, THIERRY D. Application of automated corrosion sensors for monitoring the rate of corrosion during accelerated corrosion tests[J]. Materials and Corrosion, 2014, 65(5)：448-456.
[3] FREEDMAN A J, CATALDI A. An improved MER technique is MER based on so-called corrosion sensor[J]. Corrosion, 1958, 14：567-574
[4] KOURIL M, PROSEK T, SCHEFFEL B, et al. High sensitivity electrical resistance sensors for indoor corrosion monitoring[J]. Corrosion Engineering, Science and Technology, 2013, 48：282-287.
[5] 左慧君, 金文房. 电阻探针MS3500E在线腐蚀监测应用[J]. 腐蚀与防护, 2000, 21(12)：557-559.ZUO Huijun, JIN Wenfang. Application of on line corrosion test instrument MS3500E[J]. Corrosion and Protection, 2000, 21(12)：557-559.
[6] 纪大伟. 管道内壁腐蚀监测技术研究[D]. 大连：大连理工大学, 2009. JI Dawei. Research on internal-pipeline corrosion monitoring technique[D]. Dalian：Dalian University of Technology, 2009.
[7] 王胜荣, 杜翠薇, 刘智勇, 等. Q235与X70钢在新加坡土壤中的应力腐蚀行为现场试验研究[J]. 机械工程学报, 2015, 51(12)：50-56. WANG Shengrong, DU Cuiwei, LIU Zhiyong, et al. Field experimental study on stress corrosion cracking behavior of Q235 and X70 steels in Singapore soil[J]. Journal of Mechanical Engineering, 2015, 51(12)：50-56.
[8] SUN Jiao, CHEN Songying, QU Yanpeng, et al. Review on stress corrosion and corrosion fatigue failure of centrifugal compressor impeller[J]. Chinese Journal of Mechanical Engineering, 2015, 28(2)：217-225.
[9] 柏任流, 董泽华, 郭兴蓬. 基于温度补偿的电阻探针腐蚀监测原理的研究[J]. 腐蚀科学与防护技术, 2007, 12(5)：338-341.BAI Renliu, DONG Zehua, GUO Xingpeng. Study on principle of electrical resistance probe based on temperature compensation for corrosion monitoring[J]. Corrosion Science and Protection Technology, 2007, 12(5)：338-341.
[10] RHOADES R V, FINLEY C M. Corrosion measurement with secondary temperature compensation：United States, 4587479[P]. 1986-05-06.
[11] 张学元, 邸超, 陈卓元. LN209油井管沉积物下方腐蚀行为[J]. 腐蚀科学与防护技术, 1999, 11(5)：1-5. ZHANG Xueyuan, DI Chao, CHEN Zhuoyuan. Under deposit corrosion behavior of LN209 oil tube[J]. Corrosion Science and Protection Technology, 1999, 11(5)：1-5.
[12] ZHANG G A, YU N, YANG L Y, et al. Galvanic corrosion behavior of deposit-covered and uncovered carbon steel[J]. Corrosion Science, 2014, 86：202-212.
[13] 郝文魁, 刘智勇, 黄天杰, 等. 不同敏化温度和冷凝液成分对430铁素体不锈钢电化学腐蚀行为影响[J]. 机械工程学报, 2015, 51(4)：58-65. HAO Wenkui, LIU Zhiyong, HUANG Tianjie, et al. Effects of sensitized under different temperature and composition of condensate on electrochemical behavior of 430 ferritic stainless steel[J]. Journal of Mechanical Engineering, 2015, 51(4)：58-65.
[14] HILBERT L R. Monitoring corrosion rates and localised corrosion in low conductivity water[J]. Corrosion Science, 2006, 48(12)：3907-3923.
[15] SINGER M. Study and modeling of the localized nature of top of the line corrosion[D]. Ohio：Ohio University, 2013.
[16] VISTE F, ALAM K, GUNALTUN Y, et al. Semi- empirical model for prediction of the top-of-the-line corrosion risk[C/CD]// NACE Corrosion 2002. Houston：Corrosion/2002 paper No. 245.
[17] 许立宁, 覃慧敏, 常炜. X70管线钢在含CO2湿天然气环境下腐蚀行为[J]. 北京科技大学学报, 2011, 212(12)：44-50. XU Lining, QIN Huimin, CHANG Wei. CO2 corrosion behavior of X70 pipeline steel in wet gas environment[J]. Journal of University of Science and Technology Beijing, 2011, 212(12)：44-50.
[18] HEMBLADE B. Electrical resistance sensor and apparatus for monitoring corrosion：United States, 6946855 B1[P]. 2005-09-20.
[19] 许国良, 王晓墨, 邬田华，等. 工程传热学[M]. 北京：中国电力出版社, 2005.XU Guoliang, WANG Xiaomo, WU Tianhua, et al. Engineering heat transfer[M]. Beijing：China Electric Power Press, 2005.
[20] GERSTMANN J, GRIFFITH P. Laminar film condensation on the underside of horizontal and inclined surfaces[J]. Int. J. Heat Mass Transfer, 1967, 10：567-580.
[21] VITSE F. Experimental and theoretical study of the phenomena of corrosion by carbon dioxide under dewing conditions at the top of a horizontal pipeline in presence of a noncondensablegas[D]. Ohio：Ohio University, 2002.
[22] CHANG Y C, WOOLLAM R, ORAZEM M E. Mathematical models for under-deposit corrosion[J]. Journal of Electrochemical Society, 2014, 161(6)：321-329.
[23] ZOU Y, WANG J, ZHENG Y Y. Electrochemical techniques for determining corrosion of rusted steel in seawater[J]. Corrosion Science, 2011, 53：208-216.
