| 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2474%,涂层/基材附着力先增大后减小,最终减小了183%;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3a后钢结构涂层的硬度降低了4437%,涂层/基材附着力减小了227%. |
| 关键词: 高低温循环 紫外老化 钢结构 聚氨酯涂层 力学性能 |
| DOI：103969/j.issn.1007 9629202104017 |
| 分类号: |
| 基金项目: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 |
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| Influence of Regional Special Environment on the Basic Mechanical Properties of Steel Structure Coating |
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HAO Yunhong1, XUAN Jiaoyu1, MA Sihan2, LI Jie2, TIAN Xule2
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1.School of Science, Inner Mongolia University of Technology, Hohhot 010051, China;2.School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
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| Abstract: |
| 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 2474%, and the adhesion increases at first and then decreases, reducing overall by 183%. UV aging will lead to the C—N and C—O bond rupture. The hardness of the steel structure coating is reduced by 4437%, and the adhesion is reduced by 227% after 3 years of UV aging. |
| Key words: high low temperature cycle UV aging steel structure polyurethane coating mechanical property |
