LDHs-BTA的制备及其对钢筋的阻锈性能  

Preparation of LDHs-BTA and Its Inhibition for Corrosion of Rebar

作　　者：刘俊阳 王艳 孙丛涛[2,3,4] 孙明 段继周 LIU Junyang;WANG Yan;SUN Congtao;SUN Ming;DUAN Jizhou(College of Materials Science and Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Open Studio for Marine Corrosion and Protection,Laoshan Laboratory,Qingdao 266237,China;Guangxi Key Laboratory of Marine Environmental Science,Guangxi Academy of Sciences,Nanning 530007,China)

机构地区：[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

出　　处：《建筑材料学报》2024年第6期503-513,共11页Journal of Building Materials

基　　金：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)。

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.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.

关 键 词：水滑石 阻锈剂 改性 钢筋锈蚀 氯离子吸附 

分 类 号：TU528[建筑科学—建筑技术科学]