区域特殊环境对钢结构涂层基本力学性能影响  

Influence of Regional Special Environment on the Basic Mechanical Properties of Steel Structure Coating

作　　者：郝贠洪[1,2,3,4] 宣姣羽 马思晗 李洁 田旭乐[2,3,4] HAO Yunhong;XUAN Jiaoyu;MA Sihan;LI Jie;TIAN Xule(School of Science,Inner Mongolia University of Technology,Hohhot 010051,China;School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia,Inner Mongolia University of Technology,Hohhot 010051,China;Inner Mongolia Autonomous Region Engineering Research Center of Structure Inspection,Appraisal and Safety Assessment,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学理学院,内蒙古呼和浩特010051 [2]内蒙古工业大学土木工程学院,内蒙古呼和浩特010051 [3]内蒙古工业大学内蒙古自治区土木工程结构与力学重点实验室,内蒙古呼和浩特010051 [4]内蒙古工业大学内蒙古自治区建筑检测鉴定与安全评估工程技术研究中心,内蒙古呼和浩特010051

出　　处：《建筑材料学报》2021年第4期794-799,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(11862022,11162011,51468049,11662012);内蒙古自治区自然科学基金资助项目(2018MS05047);内蒙古自治区青年科技英才支持计划项目(NJYT-17-A09);内蒙古自治区草原英才资助项目。

摘　　要：采用模拟自然环境下工程材料耐久性损伤试验系统和人工加速紫外老化试验箱,对钢结构涂层进行高低温循环试验和紫外老化试验,分析内蒙古中西部地区区域特殊环境对钢结构涂层基本力学性能的影响.结果表明:高低温循环作用使钢结构涂层的氢键化程度增加,分子间作用力增大,经历50个高低温循环后钢结构涂层的硬度提高了24.74%,涂层/基材附着力先增大后减小,最终减小了18.3%;紫外老化作用使钢结构涂层中C—N和C—O键断裂,紫外老化3 a后钢结构涂层的硬度降低了44.37%,涂层/基材附着力减小了22.7%.Based on the characteristics of the regional special environment in the Midwest of Inner Mongolia,the high-low temperature cycling tests were carried out on the steel structure coating in an experimental system for simulating durability damage of engineering materials under natural environment.The ultraviolet aging tests were also carried out on the steel structure coating in a UV aging test chamber.The influence of special environment on the basic mechanical properties of steel structure coatings was analyzed.The results show that the high-low temperature cycling increases the degree of hydrogen bonding and the intermolecular forces of the steel structure coating.Through fifty high-low temperature cycles,the hardness of the steel structure coating is increased by 24.74%,and the adhesion increases at first and then decreases,reducing overall by 18.3%.UV aging will lead to the C—N and C—O bond rupture.The hardness of the steel structure coating is reduced by 44.37%,and the adhesion is reduced by 22.7%after 3 years of UV aging.

关 键 词：高低温循环 紫外老化 钢结构 聚氨酯涂层 力学性能 

分 类 号：TQ317.9[化学工程—高聚物工业]