环氧粉末涂层的抗冲蚀性能  

EROSION RESISTANCE OF EPOXY POWDER COATING

作　　者：骆素珍[1] 郑玉贵[2] 李劲 李京 姚治铭 柯伟 

机构地区：[1]中国科学院金属腐蚀与防护研究所 [2]中国科学院金属腐蚀与防护研究所金属腐蚀与防护国家重点实验室沈阳市110015 [3]中国科学院金属腐蚀与防护研究所金属腐蚀与防护国家重点实验室

出　　处：《材料研究学报》2000年第5期517-523,共7页Chinese Journal of Materials Research

基　　金：国家自然科学基金重点项目!59831030;国家重点基础研究专项经费!G19990650资助

摘　　要：在金刚砂砂浆中。用旋转圆盘式冲刷腐蚀试验机研究了流速、含砂量、砂粒粒径等环境参数对ＳＥＢＦ－２型熔融结合环氧粉末涂层冲蚀特性的影响，并观察了涂层形貌实验结果表明：涂层的冲蚀率（Ｅ）与流速（Ｖ）、含砂量（Ｃ）、砂粒粒径（Ｄ）之间服从幂指数关系： Ｅ∝Ｖｎ１Ｃｎ２Ｄｎ３，ｎ１、ｎ２、ｎ３ 的相对大小表明，流速为主要影响因素，其次为砂粒粒径，而含砂量的影响相对较小；在本文的实验条件下，临界流速约为 ６ｍ／ｓ，涂层的第一临界粒径约为 ８０μｍ；第一临界粒径约为 ４１０μｍ．The erosion resistance of SEBF-2 fusion bonded epoxy powder coating in emery sand slurry has been investigated by using rotating disk rig. The effects of emery sand content, flow velocity and diameter of emery particle on the erosion resistance of the coating have been studied through weight loss test and surface morphology observation by SEM. The results showed that the relationship between erosion rate (E) and flow velocity (V), emery sand content (C) and diameter of particle (D) followed power law. The erosion rate could be described by a unified empirical equation E The relative large value of n1, n3 compared with n2 indicated that the flow velocity and diameter of particle were the dominant factors. Under the test condition, the critical flow velocity was about 6m/s, first critical diameter and second critical diameter of emery particle were approximately 80um and 410um, respectively. Within 80-410um, the influence of mean diameter of emery sand on erosion was significant. Therefore, the coating was suitable for the relative mild conditions of liquid--particle two--phase flow such as low flow velocity and small particle diameter. Under mild test conditions, erosion mechanism was selective erosion of relative soft epoxy binder, and the coating had good erosion. resistance due to the particle fillers. In contrast, under severetest conditions, the fillers dropped from the surface of the coating or were broken by the impinging particles, and the fillers in the coating no longer had erosion resistance.

关 键 词：环氧粉末涂层 金属 表面处理 抗冲蚀性能 

分 类 号：TG174.46[金属学及工艺—金属表面处理]