WU Kun-hu, LI Wei-ping, LIU Hui-cong, ZHU Li-qun. Nucleation behavior of CaCO3 scale on the surface of PTFE/PPS composite coatings in geothermal water environments[J]. Chinese Journal of Engineering, 2010, 32(10): 1321-1326. DOI: 10.13374/j.issn1001-053x.2010.10.014
Citation:
WU Kun-hu, LI Wei-ping, LIU Hui-cong, ZHU Li-qun. Nucleation behavior of CaCO3 scale on the surface of PTFE/PPS composite coatings in geothermal water environments[J]. Chinese Journal of Engineering, 2010, 32(10): 1321-1326. DOI: 10.13374/j.issn1001-053x.2010.10.014
WU Kun-hu, LI Wei-ping, LIU Hui-cong, ZHU Li-qun. Nucleation behavior of CaCO3 scale on the surface of PTFE/PPS composite coatings in geothermal water environments[J]. Chinese Journal of Engineering, 2010, 32(10): 1321-1326. DOI: 10.13374/j.issn1001-053x.2010.10.014
Citation:
WU Kun-hu, LI Wei-ping, LIU Hui-cong, ZHU Li-qun. Nucleation behavior of CaCO3 scale on the surface of PTFE/PPS composite coatings in geothermal water environments[J]. Chinese Journal of Engineering, 2010, 32(10): 1321-1326. DOI: 10.13374/j.issn1001-053x.2010.10.014
Key Laboratory of Aerospace Materials and Performance(Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China
The anti-scale performance of polytetrafluoroethylene (PTFE)/polyphenylene sulfide (PPS) composite coatings was studied by scanning electron microscopy (SEM) and energy dispersion spectrometry (EDS). The effect of the surface microstructure of PTFE/PPS coatings on the nucleation behavior of CaCO3 scale was analyzed. The results indicate that the surface microstructure of PTFE (latex)-blended PPS composite coatings is poriferous, and PTFE asymmetrically distributes inside and outside holes on the coating surface, inducing CaCO3 scale to nucleate firstly on the hole inside and wall. The contact angle of PTFE/PPS coatings decreases with prolonging immersion time. The increasing rate of scaling on PTFE/PPS coatings is obviously less than that of 304 stainless steel and PPS coatings.
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