Fouling and corrosion properties of SiO2 coatings on copper in geothermal water / Chen Ning in Industrial & engineering chemistry research, Vol. 51 N° 17 (Mai 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6001–6017 Titre : Fouling and corrosion properties of SiO2 coatings on copper in geothermal water Type de document : texte imprimé Auteurs : Chen Ning, Auteur ; Liu Mingyan, Auteur ; Zhou Weidong, Auteur Année de publication : 2012 Article en page(s) : pp. 6001–6017 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Geothermal utilization Corrosion Silica coatings Résumé : Two critical problems in geothermal utilization are corrosion and fouling on the surfaces of plants and fittings, and use of surface coatings is a good method to overcome such difficulties. Silica coatings with film thickness of several hundred nanometers on copper substrates were prepared by the liquid-phase deposition technique and characterized with respect to surface morphology, composition, surface free energy, roughness, and film thickness. Examinations of both fouling in calcium carbonate solution and corrosion in corrosive geothermal water on the surfaces of SiO2-coated samples were performed. The results showed that the fouling rate on the SiO2-coated surface was obviously reduced compared with that on the polished surface. Moreover, the inhibition of corrosion on the modified surface was found even though, after a long immersion time, the corrosion resistance action decreased because of the surface peeling of SiO2-coated samples. The corrosion behavior of the SiO2 coating was further studied with electrochemical measurements by electrochemical impedance spectroscopy. This work suggests a new possibility for solving the fouling and corrosion issues encountered in the use of geothermal water. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202091b [article] Fouling and corrosion properties of SiO2 coatings on copper in geothermal water [texte imprimé] / Chen Ning, Auteur ; Liu Mingyan, Auteur ; Zhou Weidong, Auteur . - 2012 . - pp. 6001–6017. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6001–6017 Mots-clés : Geothermal utilization Corrosion Silica coatings Résumé : Two critical problems in geothermal utilization are corrosion and fouling on the surfaces of plants and fittings, and use of surface coatings is a good method to overcome such difficulties. Silica coatings with film thickness of several hundred nanometers on copper substrates were prepared by the liquid-phase deposition technique and characterized with respect to surface morphology, composition, surface free energy, roughness, and film thickness. Examinations of both fouling in calcium carbonate solution and corrosion in corrosive geothermal water on the surfaces of SiO2-coated samples were performed. The results showed that the fouling rate on the SiO2-coated surface was obviously reduced compared with that on the polished surface. Moreover, the inhibition of corrosion on the modified surface was found even though, after a long immersion time, the corrosion resistance action decreased because of the surface peeling of SiO2-coated samples. The corrosion behavior of the SiO2 coating was further studied with electrochemical measurements by electrochemical impedance spectroscopy. This work suggests a new possibility for solving the fouling and corrosion issues encountered in the use of geothermal water. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202091b

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