Influence of Oxygen Concentration on Reinforcement Corrosion in Seawater Sea-Sand Mortar Based onWire Beam Electrode Technique

Abstract

Abstract: To find out the influence of oxygen concentration on reinforcement corrosion in seawater sea-sand mortar, the wire beam electrode (WBE) technique was introduced. The influences of oxygen concentration (5%, 21%, 85%, volume fraction) and water-binder ratio (W/B) (0.48, 0.18) on time-dependent behavior of corrosion potential and electrochemical impedance spectroscopy (EIS) of WBE were separately investigated. Results show that the polarization resistance of WBE decreases and corrosion current density increases with the increase of corrosion time. The changes are greater with the increase of oxygen concentration and W/B.It can be observed from the experimental results that the corrosion probability of reinforcement increases with the increase of oxygen concentration. At a low oxygen concentration (5%), the reinforcement depassivation induced by chloride can be effectively retarded and thus the reinforcement corrosion is restrained. While at a high oxygen concentration, the reinforcement experiences a nonuniform corrosion process with progressive oxygenation from part to the whole. The anticorrosion capacity of reinforcement in seawater sea-sand cement-based systems can be effectively improved by decreasing W/B.

Key words: wire beam electrode, seawater sea-sand mortar, reinforcement corrosion, oxygen concentration, water-binder ratio, electric potential, electrochemical impedance spectroscopy

CLC Number:

TU528

GAO Yuan, JIN Zuquan, LI Ning. Influence of Oxygen Concentration on Reinforcement Corrosion in Seawater Sea-Sand Mortar Based onWire Beam Electrode Technique[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(8): 2672-2683.

References

[1] 关国浩,王学志,贺晶晶.海水海砂混凝土研究进展[J].硅酸盐通报,2022,41(5):1483-1493.
GUAN G H, WANG X Z, HE J J. Research progress of seawater sea-sand concrete[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(5): 1483-1493 (in Chinese).
[2] 韩刚,王学志,辛明,等.海水海砂混凝土力学性能研究综述[J].辽宁工业大学学报(自然科学版),2021,41(6):405-408.
HAN G, WANG X Z, XIN M, et al. Summary of research on mechanical properties of marine sand concrete[J]. Journal of Liaoning University of Technology (Natural Science Edition), 2021, 41(6): 405-408 (in Chinese).
[3] 李师财,于泳,金祖权.海水海砂混凝土力学性能与耐久性研究综述[J].硅酸盐通报,2020,39(12):3743-3752.
LI S C, YU Y, JIN Z Q. Review on mechanical properties and durability of seawater and sea-sand concrete[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(12): 3743-3752 (in Chinese).
[4] 宋旭艳,姜正平,韩静云,等.海砂混凝土中钢筋锈蚀情况研究[J].混凝土与水泥制品,2019(9):19-23.
SONG X Y, JIANG Z P, HAN J Y, et al. Study on corrosion of steel bars in sea sand concrete[J]. China Concrete and Cement Products, 2019(9): 19-23 (in Chinese).
[5] 苏红艳,宋平新.海水海砂钢纤维混凝土的基本力学性能[J].混凝土与水泥制品,2020(3):55-59.
SU H Y, SONG P X. Basic mechanical properties of seawater sea-sand steel fiber concrete[J]. China Concrete and Cement Products, 2020(3): 55-59 (in Chinese).
[6] 鲁于,黄一杰,王海超,等.改性海水海砂珊瑚混凝土力学性能试验研究[J].混凝土,2019(4):150-154.
LU Y, HUANG Y J, WANG H C, et al. Experim entalstudy on the mechanical properties of modified sea watersea sand coralconcrete[J]. Concrete, 2019(4): 150-154 (in Chinese).
[7] 赵雪冰,李华勇,陈祖兵,等.海洋环境下海水海砂水泥砂浆抗压强度的时变规律[J].混凝土与水泥制品,2022(4):6-9+18.
ZHAO X B, LI H Y, CHEN Z B, et al. Time-varying laws of compressive strength of seawater sea sand cement mortar in the marine environment[J]. China Concrete and Cement Products, 2022(4): 6-9+18 (in Chinese).
[8] 刘伟,谢友均,董必钦,等.海砂特性及海砂混凝土力学性能的研究[J].硅酸盐通报,2014,33(1):15-22.
LIU W, XIE Y J, DONG B Q, et al. Study on characteristics of dredged marine sand and the mechanical properties of concrete made with dredged marine sand[J]. Bulletin of the Chinese Ceramic Society, 2014, 33(1): 15-22 (in Chinese).
[9] 肖建庄,张鹏,张青天,等.海水海砂再生混凝土的基本力学性能[J].建筑科学与工程学报,2018,35(2):16-22.
XIAO J Z, ZHANG P, ZHANG Q T, et al. Basic mechanical properties of seawater sea-sand recycled concrete[J]. Journal of Architecture and Civil Engineering, 2018, 35(2): 16-22 (in Chinese).
[10] 陈宗平,张亚旗,姚如胜,等.海砂混凝土单轴受压应力-应变全曲线试验研究[J].硅酸盐通报,2019,38(12):3934-3940+3945.
CHEN Z P, ZHANG Y Q, YAO R S, et al. Experimental study on complete stress-strain curve of sea sand concrete behavior under uniaxial loading[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(12): 3934-3940+3945 (in Chinese).
[11] LIMEIR J, AGULLÓ L, ETXEBERRIA M. Dredged marine sand as construction material[J]. European Journal of Environmental and Civil Engineering, 2012, 16(8): 906-918.
[12] 金伟良,袁迎曙,卫军.氯盐环境下混凝土结构耐久性理论与设计方法[M].北京:科学出版社,2011:9-25.
JIN W L, YUAN Y S, WEI J, et al. Durability theory and design methods of concrete structures in chloride environment[M]. Beijing: Science press, 2011: 9-25 (in Chinese).
[13] 金伟良,赵羽习.混凝土结构耐久性[M].第二版.北京:科学出版社,2014:65-79.
JIN W L, ZHAO Y X. Durability of concrete structures[M]. 2nd ed. Beijing: Science press, 2014: 65-79 (in Chinese).
[14] 牛荻涛,孙振,张路,等.珊瑚骨料混凝土中钢筋的开始锈蚀模型[J].建筑材料学报,2021,24(5):977-985.
NIU D T, SUN Z, ZHANG L, et al. Model of reinforcement incipient corrosion in coral aggregate concrete[J]. Journal of Building Materials, 2021, 24(5): 977-985 (in Chinese).
[15] 邢丽,薛瑞丰,曹喜.海砂海水混凝土性能研究[J].混凝土,2015(11):137-141.
XING L, XUE R F, CAO X. Performance of concrete with sea sand and sea water[J]. Concrete, 2015(11): 137-141 (in Chinese).
[16] 周继凯,何旭,王泽宇,等.海水海砂混凝土与潜在危害研究进展[J].科学技术与工程,2018,18(24):179-187.
ZHOU J K, HE X, WANG Z Y, et al. Research progress on seawater and sea sand concrete and its potential hazards[J]. Science Technology and Engineering, 2018, 18(24): 179-187 (in Chinese).
[17] 赵炜璇,巴恒静.含氧量对临界氯离子浓度及钢筋锈蚀速率影响[J].中国矿业大学学报,2011,40(5):714-719.
ZHAO W X, BA H J. Effects of oxygen content on chloride threshold levels and corrosion rate of concrete reinforcing bar[J]. Journal of China University of Mining & Technology, 2011, 40(5): 714-719 (in Chinese).
[18] 农喻媚,陈正.基于第一性原理的水氧相互作用下混凝土中钢筋锈蚀机理研究[J].混凝土,2020(5):24-27.
NONG Y M, CHEN Z. Study on the corrosion mechanism of reinforcement in concrete with interaction of water and oxygen based on first-principles[J]. Concrete, 2020(5): 24-27 (in Chinese).
[19] AHMAD S. Reinforcement corrosion in concrete structures, its monitoring and service life prediction: a review[J]. Cement and Concrete Composites, 2003, 25(4/5): 459-471.
[20] 杨瑞,李焰.丝束电极技术在局部腐蚀研究中的应用[J].腐蚀科学与防护技术,2014,26(3):259-264.
YANG R, LI Y. Application of wire beam electrode in local corrosion research[J]. Corrosion Science and Protection Technology, 2014, 26(3): 259-264 (in Chinese).
[21] NAING AUNG N, TAN Y J. A new method of studying buried steel corrosion and its inhibition using the wire beam electrode[J]. Corrosion Science, 2004, 46(12): 3057-3067.
[22] PAN C Q, ZHONG Q D, YANG J, et al. Investigating crevice corrosion behavior of 6061 Al alloy using wire beam electrode[J]. Journal of Materials Research and Technology, 2021, 14: 93-107.
[23] 金祖权,冯光岩,姜玉丹.利用丝束电极技术研究海洋环境下裂缝混凝土中钢筋的锈蚀[J].硅酸盐学报,2020,48(11):1791-1800.
JIN Z Q, FENG G Y, JIANG Y D. Corrosion behavior of reinforcement concrete with cracks in marine environment using wire beam electrode technique[J]. Journal of the Chinese Ceramic Society, 2020, 48(11): 1791-1800 (in Chinese).
[24] WANG K, VARELA F B, TAN M Y. The effect of electrode surface area on corrosion initiation monitoring of X65 steel in soil[J]. Corrosion Science, 2019, 152: 218-225.
[25] 董泽华,石维,郭兴蓬.用丝束电极研究模拟碳化混凝土孔隙液中缓蚀剂对碳钢局部腐蚀的抑制行为[J].物理化学学报,2011,27(1):127-134.
DONG Z H, SHI W, GUO X P. Localized corrosion inhibition of carbon steel in carbonated concrete pore solutions using wire beam electrodes[J]. Acta Physico-Chimica Sinica, 2011, 27(1): 127-134 (in Chinese).
[26] ASTM Committee. Standard test method for corrosion potentials of uncoated reinforcing steel in concrete: ASTM C876—09[S]. West Conshohocken, Pennsylvania, the United States: ASTM International, 2009.
[27] 杜荣归,李彦,刘玉,等.扫描微电极法研究钢筋局部腐蚀行为[J].建筑材料学报,2008,11(1):33-37.
DU R G, LI Y, LIU Y, et al. Study on localized corrosion behavior of reinforcing steel by scanning microelectrode technique[J]. Journal of Building Materials, 2008, 11(1): 33-37 (in Chinese).
[28] 李兰强,董士刚,王伟,等.混凝土中钢筋腐蚀早期过程宏观腐蚀电池与微观腐蚀电池相互作用[J].中国科学:技术科学,2010,40(9):1104-1108.
LI L Q, DONG S G, WANG W, et al. Study on interaction between macro cell and micro cell in the early corrosion process of reinforcing steel in concrete[J]. Scientia Sinica (Technologica), 2010, 40(9): 1104-1108 (in Chinese).
[29] 施惠生.用氧扩散法测定砂浆渗透性的研究[J].建筑材料学报,1998,1(3):12-16.
SHI H S. Research on the permeability of mortar by measuring the oxygen diffusion[J]. Journal of Building Materials, 1998, 1(3): 12-16 (in Chinese).
[30] ANDRADE C, ALONSO C. Corrosion rate monitoring in the laboratory and on-site[J]. Construction and Building Materials, 1996, 10(5): 315-328.
[31] 施锦杰,孙伟.弯曲荷载与氯盐耦合作用下混凝土中钢筋锈蚀程度评估[J].硅酸盐学报,2010,38(7):1201-1208.
SHI J J, SUN W. Evaluation of steel corrosion in concrete under simultaneous flexural load and chloride attacks[J]. Journal of the Chinese Ceramic Society, 2010, 38(7): 1201-1208 (in Chinese).