高通量换热管多孔涂层结合强度评价实验研究
Evaluation of bonding strength of porous coatings on high flux heat exchanger tubes
杨军军 1杨旭 1郭辉进 1平韶波 2刘冠颖 2李双权3
作者信息
- 1. 安泰环境工程技术有限公司,北京 100081
- 2. 安泰环境工程技术有限公司,北京 100081;钢铁研究总院有限公司,北京 100081
- 3. 中石化广州工程有限公司,广州 510000
- 折叠
摘要
高通量换热管是一种新型高效换热元件,其外表面的多孔涂层能显著增强沸腾传热特性,广泛应用于蒸发器、再沸器等工业换热.在运输、安装和运行侵蚀下,如果多孔涂层与基管的结合强度过低,会存在多孔涂层从基管上剥离的风险,导致多孔结构失效.因此,多孔涂层的结合强度是其重要的性能指标之一.目前还没有统一的定量试验方法可以有效评价多孔涂层的结合强度.因此,基于剥离法的试验原理,设计了一套适合高通量换热管多孔涂层结合强度评价试验的装置,并采用该装置对不同种类的高通量换热管样品涂层结合强度进行了测试,结果表明:该方法可以实现涂层结合强度快速有效定量测试,结合强度测试结果的一致性较好,测试结果的样本相对标准偏差(RSD)为1.89％;喷砂处理后不同粗糙度的基管表面与涂层结合强度不同,粗糙度Ra在3～6 μm时的结合强度较好.
Abstract
High flux heat exchange tube is a new type of efficient heat exchange element. Its porous coating on the outer surface can significantly enhance the boiling heat transfer characteristics,which is widely used in indus-trial heat exchange such as evaporators and reboilers. If the bonding strength between the porous coating and the base pipe is too low during transportation,installation,and operation erosion,there is a risk of the porous coating peeling off the base pipe,leading to the failure of the porous structure. Therefore,the bonding strength of porous coatings is one of its important performance indicators. At present,there is no unified quantitative testing method that can effectively evaluate the bonding strength of porous coatings. Based on the experimental principle of peel off method,a set of equipment suitable for evaluating the bonding strength of porous coatings on high-throughput heat exchange tubes was designed. The equipment is used to test the coating bonding strength of different types of high-throughput heat exchange tube samples. The results show that this method can achieve rapid and effective quantitative testing of coating bonding strength,and the of the bonding strength test results have good consisten-cy. The sample relative standard deviation (RSD) of the test results is 1.89％;The bonding strength of coatings prepared on sandblasted surfaces under different roughness levels is different too. It is concluded that the bonding strength is optimal when the roughness Ra is between 3-6 μm.
关键词
高通量换热管/多孔涂层/结合强度/剥离法/表面处理Key words
high flux heat exchanger tube/porous coating/bond strength/stripping method/surface treatment引用本文复制引用
基金项目
中国石油化工股份有限公司高效节能换热装备及元件技术开发和整体制造技术提升项目(320096)
出版年
2024
NETL
NSTL
万方数据