[1]邱林峰,左晓宝,汤玉娟,等.输水环境下水泥砂浆-球墨铸铁管腐蚀过程电化学测试[J].南京理工大学学报(自然科学版),2017,41(02):217.[doi:10.14177/j.cnki.32-1397n.2017.41.02.013]
 Qiu Linfeng,Zuo Xiaobao,Tang Yujuan,et al.Electrochemical study on corrosion process of cement-mortar-linedductile cast iron pipe under water supply[J].Journal of Nanjing University of Science and Technology,2017,41(02):217.[doi:10.14177/j.cnki.32-1397n.2017.41.02.013]
点击复制

输水环境下水泥砂浆-球墨铸铁管腐蚀过程电化学测试()
分享到:

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
41卷
期数:
2017年02期
页码:
217
栏目:
出版日期:
2017-04-30

文章信息/Info

Title:
Electrochemical study on corrosion process of cement-mortar-linedductile cast iron pipe under water supply
文章编号:
1005-9830(2017)02-0217-09
作者:
邱林峰左晓宝汤玉娟殷光吉唐洪刚
南京理工大学 理学院,江苏 南京 210094
Author(s):
Qiu LinfengZuo XiaobaoTang YujuanYin GuangjiTang Honggang
School of Science,Nanjing University of Science and Technology,Nanjing 210094,China
关键词:
线性极化电阻 电化学阻抗谱 球墨铸铁管 水泥砂浆内衬 腐蚀电流密度
Keywords:
linear polarization resistance electrochemical impedance spectroscopy ductile cast iron pipes cement-mortar lining corrosion current density
分类号:
TU593
DOI:
10.14177/j.cnki.32-1397n.2017.41.02.013
摘要:
该文针对输水条件下水泥砂浆-球墨铸铁管的腐蚀问题,设计制作了内衬水泥砂浆球墨铸铁管环试件,进行纯净水、6M硝酸铵溶液和6M氯化铵溶液扰动侵蚀下的管环试件线性极化电阻(LPR)和电化学阻抗谱(EIS)测试,分析了不同溶液中试件的线性极化电阻、腐蚀电流密度等电化学参数随腐蚀时间的变化规律,并评估了各试件在不同溶液中的腐蚀程度。结果表明,在120天的腐蚀时间内,纯净水中试件的砂浆层电阻、铸铁表面电荷转移电阻和腐蚀电流密度基本不变; 硝酸铵溶液中,试件的砂浆层电阻下降明显,但铸铁表面电荷转移电阻和腐蚀电流密度基本不变; 而在氯化铵溶液中,试件砂浆层电阻和铸铁表面电荷转移电阻均降低明显,且腐蚀电流密度远大于铸铁表面脱钝临界值; LPR与EIS所评估的试件腐蚀程度基本一致。
Abstract:
Based on the corrosion process of cement-mortar-lined ductile cast iron pipes under the water supply,the specimens of the cement-mortar-lined ductile iron circular ring are designed and prepared.After immersing these specimens into the perturbed solutions of pure water、6M ammonium nitrate and 6M ammonium chloride,the linear polarization resistance(LPR)and the electrochemical impedance spectroscopy(EIS)measurements are carried out on the specimens.The changes of electrochemical parameters such as the polarization resistance and the corrosion current density with the corrosion time are analyzed,and the corrosion degree of the specimens is evaluated.Results show that,during the 120-day corrosion,the resistance of the cement-mortar lining,the charge transfer resistance on the surface of the ductile cast iron and the corrosion current density of the specimens in pure water have little change.In the 6M ammonium nitrate solution,the resistance of the cement-mortar lining decreases obviously,and the charge transfer resistance and the corrosion current density have almost no changes.In the 6M ammonium chloride solution,both the resistance of the cement-mortar lining and the charge transfer resistance decrease obviously,and the corrosion current density is much larger than the depassivation critical value.The corrosion degree of the specimens of the LPR is basically in agreement with that of the EIS.

参考文献/References:

[1] Kamada T,Uchida S,Ojima K,et al.Deterioration diagnosis methods of ductile cast-iron pipe by impact elastic-wave[J].Journal of Japan Water Works Association,2012,81:2-12.
[2]Kleiner Y,Rajani B,Krys D.Performance of ductile iron pipes.I:Characterization of external corrosion patterns[J].Journal of Infrastructure Systems,2013,19(1):108-119.
[3]Hyun D L,Hong C S.Residual life assessment of water distribution system through analysis of cast iron pipes[J].International Journal of Control & Automation,2015,8(6):58-69.
[4]施锦杰,孙伟.混凝土中钢筋锈蚀研究现状与热点问题分析[J].硅酸盐学报,2010,38(9):1753-1764.
Shi Jinjie,Sun Wei.Recent research on steel corrosion in concrete[J].Journal of the Chinese Ceramic Society,2010,38(9):1753-1764.
[5]范进,董福兴.疲劳荷载下钢筋锈蚀混凝土构件粘结性能试验研究[J].南京理工大学学报,2009,33(6):734-738.
Fan Jin,Dong Fuxing.Bond-slip fatigue experimental study on corroded reinforcement concrete members under cyclic loading[J].Journal of Nanjing University of Science and Technology,2009,33(6):734-738.
[6]Bragan?a M O G P,Portella K F,Bonato M M,et al.Electrochemical impedance behavior of mortar subjected to a sulfate environment-a comparison with chloride exposure models[J].Construction & Building Materials,2014,68:650-658.
[7]贺鸿珠,崔玉理,史美伦,等.混凝土中钢筋锈蚀的实时监测[J].建筑材料学报,2013,16(1):50-54.
He Hongzhu,Cui Yuli,Shi Meilun,et al.Real time monitoring of corrosion of rebar in concrete[J].Journal of Building Materials,2013,16(1):50-54.
[8]Sobhani J,Najimi M.Electrochemical impedance behavior and transport properties of silica fume contained concrete[J].Construction & Building Materials,2013,47(5):910-918.
[9]Choi Y S,Kim J G,Lee K M.Corrosion behavior of steel bar embedded in fly ash concrete[J].Corrosion Science,2006,48(7):1733-1745.
[10]Triana V,Lizarazo-Marriaga J,Flórez J O.Steel corrosion assessment by electrochemical impedance on metakaolin blended mortars[J].Materials Research,2013,16(16):1457-1464.
[11]许晨,李志远,金伟良.混凝中钢筋锈蚀的电化学阻抗谱特征研究[J].腐蚀科学与防护技术,2011,23(5):393-398.
Xu Chen,Li Zhiyuan,Jin Weiliang.Electrochemical impedance spectroscopy characteristics of corrosion behavior of rebar in concrete[J].Corrosion Science and Protection Technology,2011,23(5):393-398.
[12]Stern M,Geary A.Electrochemical polarization I.A theoretical analysis of the shape of polarization curves[J].Journal of the Electrochemical Society,1957,104(1):56-63.
[13]Bouteiller V,Cremona C,Baroghel B V,et al.Corrosion initiation of reinforced concretes based on Portland or GGBS cements:Chloride contents and electrochemical characterizations versus time[J].Cement and Concrete Research,2012,42:1456-1467.
[14]Clear K C.Measuring the rate of corrosion of steel in field concrete structures[M].Washington D C,US:Transportation Research Record,1989.
[15]Cao X.Effect of chloride on atmospheric corrosion of simulated artifact iron in NO-3 bearing pollutant environment[J].Acta Metallurgica Sinica(English Letters),2006,19(1):34-42.
[16]Ye C Q,Hu R G,Dong S G,et al.EIS analysis on chloride-induced corrosion behavior of reinforcement steel in simulated carbonated concrete pore solutions[J].Journal of Electroanalytical Chemistry,2013,688(4):275-281.
[17]Palaniswamy N,Vedalakshmi R,Palaniswamy N.Analysis of the electrochemical phenomenon at the rebar-concrete interface using the electrochemical impedance spectroscopic technique[J].Magazine of Concrete Research,2010,62(3):177-189.
[18]施锦杰,孙伟,耿国庆.模拟混凝土孔溶液对钢筋钝化的影响[J].建筑材料学报,2011,14(4):452-458.
Shi Jinjie,Sun Wei,Geng Guoqing.Influence of simulated concrete pore solution on reinforcing steel passivation[J].Journal of Building Materials,2011,14(4):452-458.

备注/Memo

备注/Memo:
收稿日期:2016-04-28 修回日期:2016-07-18
基金项目:国家自然科学基金(51378262); 江苏省自然科学基金(BK20141396)
作者简介:邱林峰(1991-),男,硕士,主要研究方向:混凝土材料与结构,E-mail:qiuyimai123@126.com; 通讯作者:左晓宝(1968-),男,教授,博士生导师,主要研究方向:混凝土材料与结构、防灾工程,E-mail:xbzuo@sina.com。
引文格式:邱林峰,左晓宝,汤玉娟,等.输水环境下水泥砂浆-球墨铸铁管腐蚀过程电化学测试[J].南京理工大学学报,2017,41(2):217-225.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2017-04-30