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氯盐环境下600 MPa级耐蚀钢筋腐蚀行为研究

李霈 袁静 黄吉祥 闫博 阴树标 雷霆

李霈, 袁静, 黄吉祥, 闫博, 阴树标, 雷霆. 氯盐环境下600 MPa级耐蚀钢筋腐蚀行为研究[J]. 钢铁钒钛, 2023, 44(3): 123-130. doi: 10.7513/j.issn.1004-7638.2023.03.019
引用本文: 李霈, 袁静, 黄吉祥, 闫博, 阴树标, 雷霆. 氯盐环境下600 MPa级耐蚀钢筋腐蚀行为研究[J]. 钢铁钒钛, 2023, 44(3): 123-130. doi: 10.7513/j.issn.1004-7638.2023.03.019
Li Pei, Yuan Jing, Huang Jixiang, Yan Bo, Yin Shubiao, Lei Ting. Study on the corrosion behavior of a 600 MPa corrosion-resistant steel barin a chloride environment[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(3): 123-130. doi: 10.7513/j.issn.1004-7638.2023.03.019
Citation: Li Pei, Yuan Jing, Huang Jixiang, Yan Bo, Yin Shubiao, Lei Ting. Study on the corrosion behavior of a 600 MPa corrosion-resistant steel barin a chloride environment[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(3): 123-130. doi: 10.7513/j.issn.1004-7638.2023.03.019

氯盐环境下600 MPa级耐蚀钢筋腐蚀行为研究

doi: 10.7513/j.issn.1004-7638.2023.03.019
详细信息
    作者简介:

    李霈,1996年出生,男,河北张家口人,硕士研究生,研究方向:钢铁材料腐蚀与应用,E-mail:lp1277504201@163.com

    通讯作者:

    阴树标,男,博士,副教授,长期从事先进钢铁材料强化机制及腐蚀机理的研究工作,E-mail:278912571@qq.com

  • 中图分类号: TF76,TU375

Study on the corrosion behavior of a 600 MPa corrosion-resistant steel barin a chloride environment

  • 摘要: 以普通600 MPa级高强抗震钢筋HRB600E和经过合金调控后的同级别耐蚀钢筋为试验对象,通过周期浸润试验、电化学试验、表面分析技术和物相分析技术研究了氯盐环境下Cr、V对600 MPa级耐蚀钢筋腐蚀行为。结果表明,耐蚀合金的加入促进基体中贝氏体组织产生,减缓了铁素体阳极腐蚀进程;V、Cr元素的协同作用能够阻碍Cl下渗,有效延缓锈层生长速度,360 h周期浸润后耐蚀钢筋腐蚀速率下降;Cr-V体系元素调控下耐蚀钢筋电化学性质自腐蚀电位提升,钝化后电位正移,腐蚀电流密度下降;耐蚀钢筋钝化后交流阻抗值显著提升,在混凝土碱性环境中耐腐蚀性能优异;合金元素调控改善了钢筋腐蚀产物的物相组成,耐蚀钢筋后期腐蚀产物中α-FeOOH及γ-FeOOH 占比更高,且内锈层有尖晶石结构产物FeCr2O4富集,增加了内锈层的致密度和稳定性。
  • 图  1  HRB600cE(a)和HRB600E(b)钢筋的微观组织结构

    Figure  1.  Microstructures of HRB600cE (a) and HRB600E (b) bars by electron microscope

    图  2  HRB600cE and HRB600E不同时长下腐蚀速率(a)和年腐蚀深度(b)

    Figure  2.  Corrosion rate (a) and annual corrosion depth (b) of HRB600cE and HRB600E

    图  3  HRB600cE不同浸润时长下外锈层腐蚀宏观形貌

    Figure  3.  Corrosion profile of the outer rust layer at different immersion time of HRB600cE

    (a)72 h; (b)144 h; (c)360 h

    图  4  HRB600E不同浸润时长下外锈层腐蚀宏观形貌

    Figure  4.  Corrosion profile of the outer rust layer at different immersion time of HRB600E

    (a) 72 h; (b) 144 h; (c) 360 h

    图  5  试验钢周期浸润144、360 h后锈层微观形貌及能谱

    (a) HRB600cE,周期浸润144 h ;(b) HRB600E,周期浸润144 h ;(c) HRB600cE,周期浸润360 h;(d) HRB600E,周期浸润360 h

    Figure  5.  Micromorphology of the rust layer and XRD after 144 h and 360 h immersion

    图  6  HRB600cE(a)及HRB600E(b)不同时长下锈层腐蚀产物物相组成

    Figure  6.  XRD results of the rust layer components of HRB600cE(a) and HRB600E(b) rebars for different corrosion times

    图  7  HRB600cE及HRB600E在2.0%NaCl溶液中原始态及钝化态极化曲线

    Figure  7.  Polarization curves of HRB600cE and HRB600E rebars in a 2.0% NaCl solution

    图  8  HRB600cE及HRB600E在2%NaCl溶液中交流阻抗曲线

    Figure  8.  Nyquist plots of HRB600cE and HRB600E rebars in a 2% NaCl solution

    表  1  试验钢化学成分

    Table  1.   Chemical compositions of HRB600cE and HRB600E bar %

    钢种CSiMnSPCrMo+Ni+CuVNbFe
    HRB600cE≤0.200.501.15≤0.004≤0.018 0.75~1.10≥1.10≤0.10余量
    HRB600E0.260.701.54≤0.008≤0.025≤0.15≤0.012
    下载: 导出CSV

    表  2  锈层致密处元素组成

    Table  2.   Chemical compositions of the compact rust

    牌号浸润时长/h元素占比/%
    OCrVFeCl
    HRB600cE1445.3210.4210.25493.6840.320
    36030.8350.1580.30167.7260.980
    HRB600E14412.8220.02384.3412.267
    36027.9420.33169.0332.182
    下载: 导出CSV

    表  3  HRB600cE与HRB600E极化曲线拟合结果

    Table  3.   Fitting results of the polarization curves of HRB600cE and HRB600E

    钢筋状态Ecorr/mVicorr/(μA·cm−2)Ep/mV
    HRB600cE原始态6831.340
    HRB600cE钝化后6230.7829
    HRB600E原始态76540
    HRB600E钝化后7343.320
    下载: 导出CSV
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  • 收稿日期:  2022-12-23
  • 刊出日期:  2023-06-30

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