两种表面状态钢筋在氯盐环境下的腐蚀特征
|
摘要
采用电化学测试方法并结合显微观测技术,对混凝土模拟孔隙液中2种表面状态钢筋试件进行阳极极化试验,研究在不同氯离子浓度环境下钢筋锈蚀的变化过程.结果表明:在混凝土模拟孔隙液中无氧化皮裸筋与带氧化皮钢筋均能发生钝化,且钝化膜稳定性随氯离子浓度上升而变差,带氧化皮钢筋较无氧化皮裸筋的钝化膜更易破坏;同等氯离子浓度下,带氧化皮钢筋维钝电流较无氧化皮裸筋约大1个数量级,腐蚀更为严重.
The electrochemical technique combined with microscopic observation was used to study the anodic polarization of two kinds of steel bar specimens with different surface states in the simulated concrete pore solution, and the change process of corrosion of steel bars under different chloride ion concentrations. The results show that both steel bar without oxide skin and steel bar with oxide skin can passivate in the simulated concrete pore solution, and the stability of the passivation film becomes worse with increasing chloride ion concentration, and the steel bar with oxide skin is more vulnerable to the passivation film. With the same chloride ion concentration, the blunt current of the steel bar with oxide skin is about one order of magnitude larger than that of the steel bar without oxide skin, the corrosion of the steel bar with oxide skin is more serious.
The electrochemical technique combined with microscopic observation was used to study the anodic polarization of two kinds of steel bar specimens with different surface states in the simulated concrete pore solution, and the change process of corrosion of steel bars under different chloride ion concentrations. The results show that both steel bar without oxide skin and steel bar with oxide skin can passivate in the simulated concrete pore solution, and the stability of the passivation film becomes worse with increasing chloride ion concentration, and the steel bar with oxide skin is more vulnerable to the passivation film. With the same chloride ion concentration, the blunt current of the steel bar with oxide skin is about one order of magnitude larger than that of the steel bar without oxide skin, the corrosion of the steel bar with oxide skin is more serious.
引文
[1] MEHTA P K.Durability of concrete—Fifty years of progress[J].Special Publication,1991,126:1-32.
[2] 洪乃丰.混凝土中钢筋腐蚀与结构物的耐久性[J].公路,2001(2):66-69.HONG Naifeng.Corrosion of steel in concrete and durability of structures[J].Highway,2001(2):66-69.(in Chinese)
[3] 陈小平,王向东,李玉素,等.氯离子环境下混凝土钢筋的锈蚀过程[J].腐蚀与防护,2011,32(3):190-192.CHEN Xiaoping,WANG Xiangdong,LI Yusu,et al.Corrosion of concrete bars in chloride environment[J].Corrosion and Protection,2011,32(3):190-192.(in Chinese)
[4] 伍远辉,罗宿星,付盈盈,等.氯离子环境下混凝土钢筋的电化学阻抗谱特征[J].表面技术,2011,40(3):65-67.WU Yuanhui,LUO Suxing,FU Yingying,et al.Characteristics of electrochemical impedance spectroscopy of reinforced concrete under chloride ion environment[J].Surface Technology,2011,40(3):65-67.(in Chinese)
[5] 胡融刚,杜荣归,林昌健.氯离子侵蚀下钢筋在混凝土中腐蚀行为的EIS研究[J].电化学,2003,19(1):46-50.HU Ronggang,DU Ronggui,LIN Changjian.EIS study on corrosion behavior of steel bar in concrete under chloride attack[J].Electrochemistry,2003,19(1):46-50.(in Chinese)
[6] 吴群,刘玉,杜荣归,等.氯离子对模拟混凝土孔溶液中钢筋钝性影响的电化学研究[J].金属学报,2008,44(3):346-350.WU Qun,LIU Yu,DU Ronggui,et al.Electrochemical study on the influence of chloride ion on the blunt effect of reinforcing steel in simulated concrete pore solution[J].Acta Sinica Sinica,2008,44(3):346-350.(in Chinese)
[7] 曹楚南.腐蚀电化学原理[M].3版.北京:化学工业出版社,2008.CAO Chunan.Principles of corrosion electrochemistry[M].3rd Edition.Beijing:Chemical Industry Press,2008.(in Chinese)
[8] SONG H W,JUNG M S,LEE C H,et al.Influence of chemistry of chloride ions in cement matrix on corrosion of steel[J].ACI Materials Journal,2010,107(4):332-339.
[9] XU J,WU X,HAN E H.Acoustic emission response of sensitized 304stainless steel during intergranular corrosion and stress corrosion cracking[J].Corrosion Science,2013,73(13):262-273.
[10] KOVAC J,ALAUX C,MARROW T J,et al.Correlations of electrochemical noise,acoustic emission and complementary monitoring techniques during intergranular stress-corrosion cracking of austenitic stainless steel[J].Corrosion Science,2010,52(6):2015-2025.
[11] 谷荣坤,王鸿,宋义全.不同表面状态钢筋在含氯混凝土中的耐蚀性[J].内蒙古科技大学学报,2013,32(2):180-183.GU Rongkun,WANG Hong,SONG Yiquan.Corrosion resistance of steel bars with different surface states in chloride containing concrete[J].Journal of Inner Mongolia University of Science and Technology,2013,32(2):180-183.(in Chinese)
[12] JIANG Z Y,TIEU A K,SUN W H,et al.Characterisation of thin oxide scale and its surface roughness in hot metal rolling[J].Materials Science & Engineering A,2006,435(11):434-438.
[13] 周贤良,朱敏,华小珍,等.不同冷却方式对热轧带钢氧化皮结构及其耐蚀性的影响[J].中国腐蚀与防护学报,2010,30(4):323-328.ZHOU Xianliang,ZHU Min,HUA Xiaozhen,et al.Influence of different cooling methods on the structure and corrosion resistance of hot rolled strip[J].China Journal of Corrosion and Protection,2010,30(4):323-328.(in Chinese)
[14] 张华民,齐公台.钢铁表面高温氧化皮对基体钢腐蚀的影响[J].材料保护,1995(6):24-25.ZHANG Huamin,QI Gongtai.Effect of high temperature oxide scale on corrosion of base steel on steel surface[J].Material Protection,1995(6):24-25.(in Chinese)
[15] 叶志国,朱敏,周贤良,等.热处理温度对510L热轧带钢原始氧化皮结构及其腐蚀行为的影响[J].材料工程,2011(5):53-61.YE Zhiguo,ZHU Min,ZHOU Xianliang,et al.Effect of heat treatment temperature on the structure and corrosion behavior of original oxide skin of 510L hot rolled strip[J].Material Engineering,2011(5):53-61.(in Chinese)
[16] 周贤良,朱敏,薛会斌,等.热轧带钢的初期耐大气腐蚀性能[J].中国腐蚀与防护学报,2011,31(2):139-144.ZHOU Xianliang,ZHU Min,XUE Huibin,et al.Initial atmospheric corrosion resistance of hot rolled strip[J].China Journal of Corrosion and Protection,2011,31(2):139-144.(in Chinese)
[17] 李美栓,辛丽,钱余海,等.氧化膜应力研究进展[J].腐蚀科学与防护技术,1999,11(5):300-305.LI Meishuan,XIN Li,QIAN Yuhai,et al.Research progress of oxide film stress[J].Corrosion Science and Protection Technology,1999,11(5):300-305.(in Chinese)
[18] 韩军科,严红,黄耀,等.耐候钢表面氧化皮的结构特征及其对大气腐蚀行为的影响[J].金属学报,2017,53(2):163-174.HAN Junke,YAN Hong,HUANG Yao,et al.The structural characteristics of the surface oxidizing skin on the weathering steel and its influence on the atmospheric corrosion behavior[J].Journal of Metal,2017,53(2):163-174.(in Chinese)
[2] 洪乃丰.混凝土中钢筋腐蚀与结构物的耐久性[J].公路,2001(2):66-69.HONG Naifeng.Corrosion of steel in concrete and durability of structures[J].Highway,2001(2):66-69.(in Chinese)
[3] 陈小平,王向东,李玉素,等.氯离子环境下混凝土钢筋的锈蚀过程[J].腐蚀与防护,2011,32(3):190-192.CHEN Xiaoping,WANG Xiangdong,LI Yusu,et al.Corrosion of concrete bars in chloride environment[J].Corrosion and Protection,2011,32(3):190-192.(in Chinese)
[4] 伍远辉,罗宿星,付盈盈,等.氯离子环境下混凝土钢筋的电化学阻抗谱特征[J].表面技术,2011,40(3):65-67.WU Yuanhui,LUO Suxing,FU Yingying,et al.Characteristics of electrochemical impedance spectroscopy of reinforced concrete under chloride ion environment[J].Surface Technology,2011,40(3):65-67.(in Chinese)
[5] 胡融刚,杜荣归,林昌健.氯离子侵蚀下钢筋在混凝土中腐蚀行为的EIS研究[J].电化学,2003,19(1):46-50.HU Ronggang,DU Ronggui,LIN Changjian.EIS study on corrosion behavior of steel bar in concrete under chloride attack[J].Electrochemistry,2003,19(1):46-50.(in Chinese)
[6] 吴群,刘玉,杜荣归,等.氯离子对模拟混凝土孔溶液中钢筋钝性影响的电化学研究[J].金属学报,2008,44(3):346-350.WU Qun,LIU Yu,DU Ronggui,et al.Electrochemical study on the influence of chloride ion on the blunt effect of reinforcing steel in simulated concrete pore solution[J].Acta Sinica Sinica,2008,44(3):346-350.(in Chinese)
[7] 曹楚南.腐蚀电化学原理[M].3版.北京:化学工业出版社,2008.CAO Chunan.Principles of corrosion electrochemistry[M].3rd Edition.Beijing:Chemical Industry Press,2008.(in Chinese)
[8] SONG H W,JUNG M S,LEE C H,et al.Influence of chemistry of chloride ions in cement matrix on corrosion of steel[J].ACI Materials Journal,2010,107(4):332-339.
[9] XU J,WU X,HAN E H.Acoustic emission response of sensitized 304stainless steel during intergranular corrosion and stress corrosion cracking[J].Corrosion Science,2013,73(13):262-273.
[10] KOVAC J,ALAUX C,MARROW T J,et al.Correlations of electrochemical noise,acoustic emission and complementary monitoring techniques during intergranular stress-corrosion cracking of austenitic stainless steel[J].Corrosion Science,2010,52(6):2015-2025.
[11] 谷荣坤,王鸿,宋义全.不同表面状态钢筋在含氯混凝土中的耐蚀性[J].内蒙古科技大学学报,2013,32(2):180-183.GU Rongkun,WANG Hong,SONG Yiquan.Corrosion resistance of steel bars with different surface states in chloride containing concrete[J].Journal of Inner Mongolia University of Science and Technology,2013,32(2):180-183.(in Chinese)
[12] JIANG Z Y,TIEU A K,SUN W H,et al.Characterisation of thin oxide scale and its surface roughness in hot metal rolling[J].Materials Science & Engineering A,2006,435(11):434-438.
[13] 周贤良,朱敏,华小珍,等.不同冷却方式对热轧带钢氧化皮结构及其耐蚀性的影响[J].中国腐蚀与防护学报,2010,30(4):323-328.ZHOU Xianliang,ZHU Min,HUA Xiaozhen,et al.Influence of different cooling methods on the structure and corrosion resistance of hot rolled strip[J].China Journal of Corrosion and Protection,2010,30(4):323-328.(in Chinese)
[14] 张华民,齐公台.钢铁表面高温氧化皮对基体钢腐蚀的影响[J].材料保护,1995(6):24-25.ZHANG Huamin,QI Gongtai.Effect of high temperature oxide scale on corrosion of base steel on steel surface[J].Material Protection,1995(6):24-25.(in Chinese)
[15] 叶志国,朱敏,周贤良,等.热处理温度对510L热轧带钢原始氧化皮结构及其腐蚀行为的影响[J].材料工程,2011(5):53-61.YE Zhiguo,ZHU Min,ZHOU Xianliang,et al.Effect of heat treatment temperature on the structure and corrosion behavior of original oxide skin of 510L hot rolled strip[J].Material Engineering,2011(5):53-61.(in Chinese)
[16] 周贤良,朱敏,薛会斌,等.热轧带钢的初期耐大气腐蚀性能[J].中国腐蚀与防护学报,2011,31(2):139-144.ZHOU Xianliang,ZHU Min,XUE Huibin,et al.Initial atmospheric corrosion resistance of hot rolled strip[J].China Journal of Corrosion and Protection,2011,31(2):139-144.(in Chinese)
[17] 李美栓,辛丽,钱余海,等.氧化膜应力研究进展[J].腐蚀科学与防护技术,1999,11(5):300-305.LI Meishuan,XIN Li,QIAN Yuhai,et al.Research progress of oxide film stress[J].Corrosion Science and Protection Technology,1999,11(5):300-305.(in Chinese)
[18] 韩军科,严红,黄耀,等.耐候钢表面氧化皮的结构特征及其对大气腐蚀行为的影响[J].金属学报,2017,53(2):163-174.HAN Junke,YAN Hong,HUANG Yao,et al.The structural characteristics of the surface oxidizing skin on the weathering steel and its influence on the atmospheric corrosion behavior[J].Journal of Metal,2017,53(2):163-174.(in Chinese)
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |