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| LDHs-BTA的制备及其对钢筋的阻锈性能 |
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刘俊阳1,2,3，王艳1，孙丛涛2,3,4，孙明2,3，段继周2,3
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1.西安建筑科技大学 材料科学与工程学院，陕西 西安 710055;2.中国科学院海洋研究所 海洋腐蚀与生物污损重点实验室，山东 青岛 266071;3.崂山实验室 海洋腐蚀与防护开放工作室， 山东 青岛 266237;4.广西科学院 广西近海海洋环境科学重点实验室，广西 南宁 530007
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| 摘要: |
| 采用焙烧-还原法制备了苯并三唑改性水滑石（LDHs-BTA）并对其进行了表征，同时通过电化学阻抗谱测试和氯离子吸附试验探究了LDHs-BTA对钢筋的阻锈性能.结果表明：LDHs-BTA能够有效提升模拟混凝土孔隙溶液中钢筋的耐腐蚀性能；LDHs-BTA通过层间BTA-与Cl-之间的离子交换，实现了对Cl-的吸附，其吸附过程符合Langmuir吸附模型，最大吸附量为308.41 mg/g；当LDHs-BTA掺量为0.5%时，钢筋锈蚀的临界Cl-浓度显著增大，从0.02 mol/L提升至0.10 mol/L. |
| 关键词: 水滑石 阻锈剂 改性 钢筋锈蚀 氯离子吸附 |
| DOI：10.3969/j.issn.1007-9629.2024.06.004 |
| 分类号:TU528 |
| 基金项目:山东省自然科学基金资助项目（ZR2020KE046）；国家重大科研仪器研制项目（41827805）；国家优秀青年科学基金资助项目（52222806）；陕西省杰出青年科学基金资助项目（2022JC-20）；崂山实验室山东省专项经费“问海计划”项目（No.2021WHZZB2305） |
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| Preparation of LDHs-BTA and Its Inhibition for Corrosion of Rebar |
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LIU Junyang1,2,3, WANG Yan1, SUN Congtao2,3,4, SUN Ming2,3, DUAN Jizhou2,3
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1.College of Materials Science and Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China;2.Key Laboratory of Marine Environmental Corrosion and Bio-fouling， Institute of Oceanology， Chinese Academy of Sciences， Qingdao 266071， China;3.Open Studio for Marine Corrosion and Protection， Laoshan Laboratory， Qingdao 266237， China;4.Guangxi Key Laboratory of Marine Environmental Science，Guangxi Academy of Sciences， Nanning 530007， China
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| Abstract: |
| Benzotriazole modified hydrotalcite （LDHs-BTA） was prepared using the roasting-reduction method. The corrosion resistance of LDHs-BTA to rebars was investigated using electrochemical impedance spectroscopy and chloride adsorption test. The results show that LDHs-BTA can effectively improve the corrosion resistance of rebars in simulated concrete pore solution. LDHs-BTA adsorbs Cl- through the ion exchange between BTA- and Cl- in the interlayer. The adsorption follows the Langmuir adsorption model， and the maximum adsorption capacity is 308.41 mg/g. When addition of LDHs-BTA is 0.5%， the critical concentration of Cl- for rebars corrosion increases significantly from 0.02 mol/L to 0.10 mol/L. |
| Key words: hydrotalcite corrosion inhibitor modification rebar corrosion chloride ion adsorption |
