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
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