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中国腐蚀与防护学报  2016, Vol. 36 Issue (4): 363-369    DOI: 10.11902/1005.4537.2015.167
  研究报告 本期目录 | 过刊浏览 |
耐海水腐蚀钢筋00Cr10MoV的组织结构及性能研究
张建春1(),左龙飞1,蒋金洋2,麻晗1,宋丹2
1. 江苏省 (沙钢) 钢铁研究院 张家港 215625
2. 东南大学材料科学与工程学院 南京 211189
Microstructure and Properties of Seawater Corrosion Resistant Rebar Steel 00Cr10MoV
Jianchun ZHANG1(),Longfei ZUO1,Jinyang JIANG2,Han MA1,Dan SONG2
1. Institute of Research of Iron & Steel, Shasteel, Zhangjiagang 215625, China
2. School of Material Science and Engineering, Southeast University, Nanjing 211189, China
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摘要: 

分析了耐海水腐蚀钢筋00Cr10MoV的显微组织和力学性能,并采用盐雾、周浸腐蚀实验、电化学阻抗谱以及极化曲线等测试方法进一步评价其耐蚀性能。结果表明,该耐海水腐蚀钢筋的显微组织主要为铁素体加贝氏体,屈服强度达到450 MPa以上;与普通的20MnSiV钢筋相比,该材料在模拟海洋环境中有优异的抗腐蚀性能,电荷转移电阻达到1.37×105 Ωcm2,是20MnSiV钢筋的100多倍;其表面的腐蚀产物主要以α-FeOOH,β-FeOOH和γ-FeOOH为主,含有少量Fe3O4和微量含氯产物Na3CrCl16,Fe+3O(OH,Cl)。

关键词 耐海水腐蚀钢筋显微组织周浸腐蚀实验电化学阻抗谱    
Abstract

The microstructure and mechanical properties of the seawater corrosion resistant rebar steel 00Cr10MoV was investigated, while its corrosion resistance was studied by salt-spray test, periodical immersion test, electrochemical impedance spectroscopy and polarization curve measurements. The results show that the microstructure of 00Cr10MoV composed of ferrite and bainite with yield strength above 400 MPa. Compared with 20MnSiV, 00Cr10MoV had excellent corrosion resistance in simulated marine environment. The charge-transfer resistance of 00Cr10MoV was 1.37×105 Ωcm2, 100 times more than 20MnSiV. Its corrosion products consist of major phases α-FeOOH, β-FeOOH and γ-FeOOH, minor phase Fe3O4 and trace phases Na3CrCl16 and Fe+3O(OH, Cl).

Key wordsseawater corrosion resistant rebar    microstructure    periodical immersion test    electrochemical impedance spectroscopy
    
基金资助:江苏省产学研联合创新资金-前瞻性联合研究项目(BY2013091) 资助

引用本文:

张建春,左龙飞,蒋金洋,麻晗,宋丹. 耐海水腐蚀钢筋00Cr10MoV的组织结构及性能研究[J]. 中国腐蚀与防护学报, 2016, 36(4): 363-369.
Jianchun ZHANG, Longfei ZUO, Jinyang JIANG, Han MA, Dan SONG. Microstructure and Properties of Seawater Corrosion Resistant Rebar Steel 00Cr10MoV. Journal of Chinese Society for Corrosion and protection, 2016, 36(4): 363-369.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2015.167      或      https://www.jcscp.org/CN/Y2016/V36/I4/363

Steel C Si Mn P S Cr Mo V Fe
00Cr10MoV ≤0.03 0.40~0.60 1.40~1.60 ≤0.01 ≤0.01 9.5~10.5 0.9~1.2 0.03~0.10 Bal.
20MnSiV 0.21 0.49 1.44 0.019 0.007 --- --- 0.028 Bal.
表1  实验用钢的化学成分
Sample Rp0.2 / MPa Rm / MPa A / % Agt / %
1 452 656 25.1 11.7
2 458 654 24.6 10.3
3 450 651 24.2 10.9
Average 453 654 24.6 11.0
表2  00Cr10MoV钢筋的力学性能
图1  00Cr10MoV钢筋的显微组织
图2  00Cr10MoV钢筋显微组织中的合金元素分布
图3  两种钢筋在不同腐蚀条件下的腐蚀速率
图4  两种钢筋盐雾实验360 h除锈前后的宏面形貌
图5  两种钢筋周浸实验360 h除锈前后的宏面形貌
图6  周浸实验360 h后两种钢筋腐蚀产物的XRD谱
图7  两种钢筋试样的动态极化曲线
图8  两种钢筋试样的阻抗图及其拟合结果
图9  阻抗等效电路
Sample Rs
Ωcm2
Qdl-Yo
Ssncm-2
Qdl-n
(0~1)
Rt
Ωcm2
00Cr10MoV 3.981 4.84×10-5 0.9164 1.37×105
20MnSiV 2.633 8.36×10-4 0.835 1.11×103
表3  电化学阻抗谱拟合参数
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