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工程科学与技术:2022,54(4):141-146
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紫外老化作用下钢结构涂层受风沙冲蚀性能研究
郝贠洪1,2,3,4, 宣姣羽1,3,4, 李洁2,3,4, 田旭乐2,3,4, 马思晗2,3,4
(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)
Study on Sand Erosion Performance of Steel Structure Coatings Under UV Aging
HAO Yunhong1,2,3,4, XUAN Jiaoyu1,3,4, LI Jie2,3,4, TIAN Xule2,3,4, MA Sihan2,3,4
(1.School of Sci., Inner Mongolia Univ. of Technol., Hohhot 010051, China;2.School of Civil Eng., Inner Mongolia Univ. of Technol., Hohhot 010051, China;3.Key Lab. of Civil Eng. Structure and Mechanics of Inner Mongolia, Hohhot 010051, China;4.Building Inspection, Identification and Safety Assessment Eng. Technol. Research Center of Inner Mongolia, Hohhot 010051, China)
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投稿时间:2021-04-16    修订日期:2021-06-22
中文摘要: 针对内蒙古地区钢结构建筑及构筑物长期受区域特殊环境(高原强紫外环境和风沙环境)影响这一现状,根据内蒙古中西部地区区域自然环境特征,利用人工加速紫外老化试验箱和模拟风沙环境侵蚀实验系统,对钢结构聚氨酯涂层进行紫外老化试验和老化后风沙冲蚀试验,应用纳米压痕仪及漆膜弹性测试仪分析紫外线辐射对钢结构涂层基本力学性能的影响,同时结合傅里叶变换红外光谱FT-IR和扫描电子显微镜SEM分析钢结构涂层在紫外辐照下的老化行为,对紫外老化作用下钢结构涂层受风沙冲蚀性能进行研究。结果表明:未老化钢结构聚氨酯涂层硬度为16.41 MPa,柔韧性为0.5 mm,紫外老化导致钢结构涂层硬度及柔韧性明显降低,紫外老化3 a后钢结构涂层硬度降低为原来的55.63%;紫外老化作用使钢结构聚氨酯涂层化学键发生断裂,其中C-O和C-N键断裂,最终生成氨基自由基,释放出CO2,且涂层出现了明显的裂纹、起皮、皲裂,并出现了老化残渣和白色结晶物质,涂层的粗糙度增加;钢结构涂层受紫外老化作用后,冲蚀率增加,耐冲蚀性能明显降低,低角度冲蚀时,钢结构涂层破坏的主要原因是水平方向的微切削作用,高角度冲蚀时,钢结构涂层破坏的主要原因是垂直方向的挤压变形作用;紫外老化作用使钢结构涂层最大冲蚀率角度由38°变为30°~35°,紫外老化作用导致钢结构涂层最大冲蚀率角度减小。
Abstract:Based on the characteristics of sandstorm environment in midwest of Inner Mongolia, the ultraviolet aging tests were carried out on the polyurethane coating in UV aging test chamber. The aeolian erosion tests were carried out on the aged coating through a simulated sandstorm experiment system. Nanoindenter and Paint Film Elasticity Tester were used to analyze the basic mechanical properties of steel structure polyurethane coating. Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy were used to analyze the aging behavior of polyurethane coating under ultraviolet light. Study on the erosion resistance of aged coating by aeolian erosion. The results showed that the hardness of the polyurethane coating of unaged steel structure is 16.41 MPa, and the flexibility is 0.5 mm. UV aging causes a significant decrease in the hardness and flexibility of the steel structure coating. After three years of UV aging, the hardness of the steel structure coating decreases to 55.63%; UV aging effect breaks the chemical bond of polyurethane coating on steel structure, among which C-O and C-N bond break and finally generate amino radicals, release CO2, and the coating has obvious cracks, peeling, chapped, aging residue and white crystalline substances, and the roughness of the coating increases; After the steel structure coating is subjected to ultraviolet aging, the erosion rate increases, and the erosion resistance performance is significantly reduced. The main reason for the damage of the steel structure coating during low-angle erosion is the horizontal direction The main reason for the damage of the steel structure coating during high-angle erosion is the vertical extrusion deformation. The ultraviolet aging effect changes the maximum erosion rate angle of the steel structure coating from 38° to 30°~35°. The ultraviolet aging effect causes the maximum erosion rate angle of the steel structure coating to decrease.
文章编号:202100333     中图分类号:TQ317.9    文献标志码:
基金项目:国家自然科学基金项目(11862022;11162011;51468049;11662012);内蒙古自治区自然科学基金项目(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项目;内蒙古自治区研究生科研创新项目(BZ2020034)
作者单位E-mail
郝贠洪 内蒙古工业大学 理学院内蒙古 呼和浩特 010051
内蒙古工业大学 土木工程学院内蒙古 呼和浩特 010051
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
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 
13947133205@163.com 
宣姣羽 内蒙古工业大学 理学院内蒙古 呼和浩特 010051
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
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 
18947139679@163.com 
李洁 内蒙古工业大学 土木工程学院内蒙古 呼和浩特 010051
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
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 
 
田旭乐 内蒙古工业大学 土木工程学院内蒙古 呼和浩特 010051
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
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 
 
马思晗 内蒙古工业大学 土木工程学院内蒙古 呼和浩特 010051
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
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 
 
Author NameAffiliationE-mail
HAO Yunhong School of Sci., Inner Mongolia Univ. of Technol., Hohhot 010051, China
School of Civil Eng., Inner Mongolia Univ. of Technol., Hohhot 010051, China
Key Lab. of Civil Eng. Structure and Mechanics of Inner Mongolia, Hohhot 010051, China
Building Inspection, Identification and Safety Assessment Eng. Technol. Research Center of Inner Mongolia, Hohhot 010051, China 
13947133205@163.com 
XUAN Jiaoyu School of Sci., Inner Mongolia Univ. of Technol., Hohhot 010051, China
Key Lab. of Civil Eng. Structure and Mechanics of Inner Mongolia, Hohhot 010051, China
Building Inspection, Identification and Safety Assessment Eng. Technol. Research Center of Inner Mongolia, Hohhot 010051, China 
18947139679@163.com 
LI Jie School of Civil Eng., Inner Mongolia Univ. of Technol., Hohhot 010051, China
Key Lab. of Civil Eng. Structure and Mechanics of Inner Mongolia, Hohhot 010051, China
Building Inspection, Identification and Safety Assessment Eng. Technol. Research Center of Inner Mongolia, Hohhot 010051, China 
 
TIAN Xule School of Civil Eng., Inner Mongolia Univ. of Technol., Hohhot 010051, China
Key Lab. of Civil Eng. Structure and Mechanics of Inner Mongolia, Hohhot 010051, China
Building Inspection, Identification and Safety Assessment Eng. Technol. Research Center of Inner Mongolia, Hohhot 010051, China 
 
MA Sihan School of Civil Eng., Inner Mongolia Univ. of Technol., Hohhot 010051, China
Key Lab. of Civil Eng. Structure and Mechanics of Inner Mongolia, Hohhot 010051, China
Building Inspection, Identification and Safety Assessment Eng. Technol. Research Center of Inner Mongolia, Hohhot 010051, China 
 
作者简介:第一作者:郝贠洪(1977-),男,教授,博士.研究方向:区域特殊环境下工程结构和材料耐久性损伤及评价.E-mail:13947133205@163.com;通信作者:宣姣羽,E-mail:18947139679@163.com
引用文本:
郝贠洪,宣姣羽,李洁,田旭乐,马思晗.紫外老化作用下钢结构涂层受风沙冲蚀性能研究[J].工程科学与技术,2022,54(4):141-146.
HAO Yunhong,XUAN Jiaoyu,LI Jie,TIAN Xule,MA Sihan.Study on Sand Erosion Performance of Steel Structure Coatings Under UV Aging[J].Advanced Engineering Sciences,2022,54(4):141-146.