摘要
为提升医院特殊建筑用聚氨酯密封胶防腐性能,对医院建筑用聚氨酯密封胶防腐性能进行分析。制备了一种适用于医院特殊建筑用改性聚氨酯密封胶并将其涂抹到混凝土基体上,构建测试试件。将试件放到盐雾侵蚀环境、湿热腐蚀环境、干湿循环腐蚀环境中进行腐蚀模拟,测试腐蚀后的电化学阻抗谱和附着力。结果表明,随着腐蚀时间的延长,电阻值在呈现降低的趋势。剥离率和孔隙率对比可知,盐雾侵蚀环境中的剥离率和孔隙率要高于湿热腐蚀环境、干湿循环腐蚀环境。随着腐蚀时间的延长,附着力整体呈现下降状态,其中湿热腐蚀环境附着力下降的最快,其次是盐雾侵蚀环境,最后是干湿循环腐蚀环境。
In order to improve the anti-corrosion performance of polyurethane sealants for special buildings in hospitals,the anti-corrosion performance of polyurethane sealants for hospital buildings was analyzed.A modified polyurethane sealant suitable for special construction in hospitals was prepared and applied to the concrete matrix to construct test specimens.The specimen was placed in the salt spray erosion environment,damp heat corrosion environment,and dry and wet cycle corrosion environment for corrosion simulation,and the electrochemical impedance spectrum and adhesion after corrosion were tested.The results showed that the resistance value decreased with the extension of corrosion time.The comparison of peel rate and porosity showed that the peel rate and porosity in salt spray erosion environments were higher than those in damp heat corrosion environments and dry wet cyclic corrosion environments.With the extension of corrosion time,the overall adhesion decreased,with the fastest decrease occurring in damp heat corrosion environments,followed by salt spray corrosion environments,and finally the dry wet cyclic corrosion environments.
作者
杨阳
王晶晶
朱浩
张昊冲
钱怡佳
YANG Yang;WANG Jingjing;ZHU Hao;ZHANG Haochong;QIAN Yijia(The Second Affiliated Hospital of Suzhou University,Suzhou 215000,Jiangsu China)
出处
《粘接》
CAS
2024年第2期35-37,45,共4页
Adhesion
关键词
医院建筑
聚氨酯密封胶
腐蚀环境
电化学阻抗谱
附着力
防腐性能
hospital building
polyurethane sealant
corrosive environment
electrochemical impedance spectroscopy
Adhesion
corrosion resistance performance
