地热水环境中PTFE/PPS复合涂层的阻垢特性  

Anti-scaling characterization of PTFE/PPS composite coating in the geothermal water environment

作　　者：吴坤湖[1] 朱立群[1] 李卫平[1] 刘慧丛[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院,空天材料与服役教育部重点实验室,北京100191

出　　处：《复合材料学报》2010年第5期47-54,共8页Acta Materiae Compositae Sinica

基　　金：国家863计划资助项目(2007AA05Z441)

摘　　要：针对地热水环境中金属管道和设备常见的结垢问题,采用图像二值化处理法、扫描电子显微镜、能谱仪、电化学测试等方法对比研究了304不锈钢管、环氧有机硅涂层、聚苯硫醚(PPS)涂层和聚四氟乙烯(PTFE)/PPS复合涂层在静态模拟地热水中的阻垢性能。结果表明:地热水中不同涂层表面结垢物质的微观形貌为"针"形物,组成主要为CaCO3;PTFE/PPS涂层的表面能低于单纯的PPS涂层,可以有效地抑制结垢晶核在其表面的形成;实验10天的PTFE/PPS涂层表面的结垢质量为304不锈钢管表面结垢质量的37.3%;同时,PTFE/PPS涂层在模拟地热水中具有较好的耐蚀性。The anti-scaling performance of 304 stainless steel pipe,epoxy-silicone coating,polyphenylene sulfide（PPS） coating and polytetrafluoroethylene（PTFE）/PPS coating was studied by the methods of image binarization processing,scanning electron microscopy,energy dispersion spectrometry,electrochemical test and so on.The results indicate that the scale formed on the different coatings consisted of a needle-like substance and its main components are CaCO3.The surface energy of PTFE/PPS coating is lower than that of PPS coating,which could restrain effectively the scaling nucleus to form on the sample surface and affect the growth way of nucleus.After the samples were immersed in the static simulated geothermal water for 10 days,the mass of scaling on the PTFE/PPS coating surface was equal to 37.3% with respect to that on the 304 stainless steel.Furthermore,PTFE/PPS coating has a better anti-corrosion performance in the simulated geothermal water.

关 键 词：地热水 金属管道 PTFE/PPS复合涂层 阻垢性 耐蚀性 

分 类 号：TB332[一般工业技术—材料科学与工程] TB302