تاثیر افزودن نانوذرات آلومینا و شرایط پخت بر خواص ضدخوردگی پوشش پلی‌استر الکترواستاتیک

نوع مقاله: مقاله پژوهشی

نویسندگان

دانشکده مهندسی مواد و معدن، دانشگاه تربیت مدرس، تهران، ایران

چکیده

در این تحقیق خواص خوردگی پوشش‌های پلی‌استری ایجادشده به‏روش پاشش الکترواستاتیک بررسی ‌شده‏اند. پاشش الکترواستاتیک روشی ایده‌آل و کاملا صنعتی برای اعمال پوشش‌های پودری پلی‌استری روی انواع قطعات فولادی است. در این تحقیق پوشش نانوکامپوزیتی پلی‌استر-10% وزنی نانوآلومینا، نانوکامپوزیت پلی‌استر-20% وزنی نانوآلومینا و پوشش پلی‌استر خالص با این روش روی سطوح فولاد ساده کربنی اعمال شدند. برای اطمینان از پراکندگی مطلوب نانوذرات آلومینا در داخل زمینه پلیمری، از پودر نانوکامپوزیتی تهیه‌شده تصاویر میکروسکوپ الکترونی گسیل میدانی(FE-SEM) گرفته شدند. مورفولوژی و ساختار پوشش‌های اعمالی به کمک میکروسکوپ الکترونی روبشی(SEM) بررسی شد. با استفاده از آزمون‌های غوطه‌وری و طیف‌سنجی امپدانس الکتروشیمیایی(EIS)، خواص خوردگی پوشش‌ها بررسی شدند. نتایج آزمون‌های خوردگی نشان دادند که مقاومت خوردگی پوشش در اثر افزودن 10% وزنی نانوآلومینا حدود 30 برابر شد. نمونه‌های نانوکامپوزیتی حاوی 20% وزنی نانوذره رفتاری ضعیف‌تر از نمونه‌های حاوی 10% وزنی نانوآلومینا نشان دادند.
 

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of the Addition of Alumina Nanoparticles and Curing Conditions on the Anticorrosion Properties of Polyester Electrostatic Coatings

نویسندگان [English]

  • Aboozar Golgoon
  • Mahmood Aliofkhazraei
  • Mansour Toorani
  • Mohammad Hossein Morad
  • Alireza Rouhaghdam
Mining and Material Engineering, Tarbiat Modares University, Tehran, Iran
چکیده [English]

In this study, corrosion properties of polyester coatings which were fabricated by electrostatic method was studied. Electrostatic spraying is a usuall (or common) method to apply powder coatings on steel parts. In this study, %10 & %20 weight nanoalumina-polyester nanocomposite and pure polyester powder were coated on carbon steel surfaces. To ensure good dispersion of alumina nanoparticles within the polymer matrix, the nanocomposite powder was seen by field emission electron microscopy (FE-SEM). Morphology and structure of coatings were investigated by Scanning Electron Microscopy (SEM). By Immersion test, Tafel polarization and electrochemical impedance spectroscopy (EIS), the corrosion properties of coatings were investigated. Corrosion test results showed that the corrosion resistance coatings by %10 weight Nanoalumina is increased about 30 times. Nanocomposite containing %20 wt Nanoalumina had weaker behavior compared to containing %10 wt Nanoalumina.
 

کلیدواژه‌ها [English]

  • Electrostatic
  • Nanocomposite
  • Polyester Coating
  • Corrosion
  • Electrochemical Impedance Spectroscopy

[1]. Mafi I. R. and Dehghanian C., “Comparison of the coating properties and corrosion rates in electroless Ni–P/PTFE composites prepared by different types of surfactants”, Appl. Surf. Sci., Vol. 257, no. 20, pp. 8653–8658, 2011.##

[2]. Saji V. S. and Thomas J., “Nanomaterials for corrosion control,” Curr. Sci., Vol. 92, No. 1, pp. 51–55, 2007.##

[3]. Nejati K., Rezvani Z. and Pakizevand R., “Synthesis of ZnO nanoparticles and investigation of the ionic template effect on their size and shape”, Int. Nano Lett., Vol. 1, No. 2, pp. 75–81, 2011.##

[4]. Dhoke S. K. and Khanna A. S., “Electrochemical behavior of nano-iron oxide modified alkyd based waterborne coatings,” Mater. Chem. Phys., Vol. 117, No. 2–3, pp. 550–556, 2009.##

[5]. Zhang G., Liao H., Cherigui M., Davim J. P. and Coddet C., “Effect of crystalline structure on the hardness and interfacial adherence of flame sprayed poly (ether–ether–ketone) coatings,” Eur. Polym. J., Vol. 43, No. 3, pp. 1077–1082, 2007.##

[6]. Huttunen-Saarivirta E., Vaganov G. V, Yudin V. E. and Vuorinen J., “Characterization and corrosion protection properties of epoxy powder coatings containing nanoclays,” Prog. Org. Coatings, Vol. 76, No. 4, pp. 757–767, 2013.##

[7]. Piazza D., Lorandi N. P., Pasqual C. I., Scienza L. C. and Zattera A. J., “Influence of a microcomposite and a nanocomposite on the properties of an epoxy-based powder coating,” Mater. Sci. Eng. A, Vol. 528, No. 22, pp. 6769–6775, 2011.##

[8]. Kozhukharov S., Kozhukharov V., Wittmar M., Schem M., Aslan M., Caparrotti H. and Veith M., “Protective abilities of nanocomposite coatings containing Al2O3 nano-particles loaded by CeCl3”, Prog. Org. Coatings, Vol. 71, No. 2, pp. 198–205, 2011.##

[9]. Naderi R., Attar M. M. and Moayed M. H., “EIS examination of mill scale on mild steel with polyester–epoxy powder coating,” Prog. Org. Coatings, Vol. 50, No. 3, pp. 162–165, 2004.##

[10]. Li D., Wang F., Yu X., Wang J., Liu Q., Yang P., He Y., Wang Y. and Zhang M., “Anticorrosion organic coating with layered double hydroxide loaded with corrosion inhibitor of tungstate,” Prog. Org. Coatings, Vol. 71, No. 3, pp. 302–309, 2011.##

[11]. Matin E., Attar M. M., and Ramezanzadeh B., “Progress in organic coatings investigation of corrosion protection properties of an epoxy nanocomposite loaded with polysiloxane surface modified nanosilica particles on the steel substrate,” Prog. Org. Coatings, Vol. 78, pp. 395–403, 2015.##

[12]. Živković L. S., Jegdić B. V., Popić J. P., Bajat J. B. and Miskovic-Stankovic V. B., “The influence of Ce-based coatings as pretreatments on corrosion stability of top powder polyester coating on AA6060,” Prog. Org. Coatings, Vol. 76, No. 10, pp. 1387–1395, 2013.##

[13]. Plawecka M., Snihirova D., Martins B., Warszynski P. and Montemor M. F., “Self healing ability of inhibitor-containing nanocapsules loaded in epoxy coatings applied on aluminium 5083 and galvanneal substrates,” Electrochim. Acta, Vol. 140, pp. 282–293, 2014.##

[14]. Huttunen-saarivirta E., Vaganov G. V, Yudin V. E. and Vuorinen J., “Progress in organic coatings characterization and corrosion protection properties of epoxy powder coatings containing nanoclays,” Prog. Org. Coatings, Vol. 76, No. 4, pp. 757–767, 2013.##

[15]. Lu W.-K., Elsenbaumer R. L. and Wessling B., “Corrosion protection of mild steel by coatings containing polyaniline,” Synth. Met., Vol. 71, No. 1, pp. 2163–2166, 1995.##

[16]. M. Saremi and M. Yeganeh, “Application of mesoporous silica nanocontainers as smart host of corrosion inhibitor in polypyrrole coatings,” Corros. Sci., Vol. 86, pp. 159–170, 2014.##

[17]. Naderi R., Attar M. M. and Moayed M. H., “EIS examination of mill scale on mild steel with polyester–epoxy powder coating,” Prog. Org. Coatings, Vol. 50, No. 3, pp. 162–165, 2004.##

[18]. Liu Z., Dong Y., Chu Z., Yang Y., Li Y. and Yan D., “Corrosion behavior of plasma sprayed ceramic and metallic coatings on carbon steel in simulated seawater,” Mater. Des., Vol. 52, No. 29, pp. 630–637, 2013.##

[19]. Palraj S., Selvaraj M., Maruthan K. and Rajagopal G., “Corrosion and wear resistance behavior of nano-silica epoxy composite coatings,” Prog. Org. Coatings, Vol. 81, pp. 132–139, 2015.##

[20]. Bakhshandeh E., Jannesari A., Ranjbar Z., Sobhani S. and Saeb M. R., “Anti-corrosion hybrid coatings based on epoxy–silica nano-composites: Toward relationship between the morphology and EIS data,” Prog. Org. Coatings, Vol. 77, No. 7, pp. 1169–1183, 2014.##

[21]. Yuan X., Yue Z. F., Chen X., Wen S. F., Li L. and Feng T., “Progress in organic coatings EIS study of effective capacitance and water uptake behaviors of silicone-epoxy hybrid coatings on mild steel,” Vol. 86, pp. 41–48, 2015.##

[22]. Erbil M. and Özcan M., “EIS study of the effect of high levels of SO2 on the corrosion of polyester-coated galvanised steel at different relative humidities,” Vol. 44, pp. 279–285, 2002.##

[23]. Hinderliter B. R., Croll S. G., Tallman D. E., Su Q. and Bierwagen G. P., “Interpretation of EIS data from accelerated exposure of coated metals based on modeling of coating physical properties,” Electrochim. Acta, Vol. 51, No. 21, pp. 4505–4515, 2006.##

[24]. Attar M. M., Naderi R. and Moayed M. H., “Investigation on the effect of various surface preparations on corrosion performance of powder coated steel by EIS,” Mater. Corros., Vol. 56, No. 5, pp. 325–328, 2005.##

[25]. Deflorian F., Fedrizzi L., Rossi S. and Bonora P. L., “Organic coating capacitance measurement by EIS: ideal and actual trends,” Electrochim. Acta, Vol. 44, No. 24, pp. 4243–4249, 1999.##

[26]. Francisco J. S., Capelossi V. R. and Aoki I. V., “Evaluation of a sulfursilane anticorrosive pretreatment on galvannealed steel compared to phosphate under a waterborne epoxy coating,” Electrochim. Acta, Vol. 124, pp. 1–8, 2013.##

[27]. Kozhukharov S., Kozhukharov V., Schem M., Aslan M., Wittmar M., Wittmar A. and Veith M., “Protective ability of hybrid nano-composite coatings with cerium sulphate as inhibitor against corrosion of AA2024 aluminium alloy,” Prog. Org. Coatings, Vol. 73, No. 1, pp. 95–103, 2012.##