نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشکده مهندسی مواد، دانشگاه تربیت مدرس، تهران، ایران

2 استادیار، دانشکده مهندسی مواد، دانشگاه تربیت مدرس، تهران، ایران

3 دانشجوی دکترا، دانشکده مهندسی مواد، دانشگاه تربیت مدرس، تهران، ایران

4 کارشناس ارشد، دانشکده مهندسی مواد، دانشگاه شیراز، شیراز، ایران

چکیده

در این مقاله به بررسی خواص خوردگی، ساختار و مورفولوژی پوشش‌های پلیمری ایجاد شده به‌کمک دستگاه پاشش الکترواستاتیک پرداخته ‌شده است. به این منظور نانوذرات رس به میزان 5% وزنی درون زمینه پلیمر پلی‌استری به‌کمک روش‌های متوالی و مختلف اختلاط به‌خوبی پراکنده‌شده و سپس پودر نانوکامپوزیتی تهیه ‌شده به‌کمک روش پاشش الکترواستاتیک روی سطح قطعات فولاد ساده کربنی پوشش داده ‌شده و با پوشش‌های پلی‌استری خالص مقایسه شدند. مورفولوژی و ساختار نانوذرات‌ رس توسط میکروسکوپ الکترونی روبشی و عبوری بررسی شد. تصاویر میکروسکوپ الکترونی روبشی و عبوری مربوط به نانوذرات ‌رس نشان دهنده صفحات لایه‌لایه ‌رس می‌باشد. تصاویر میکروسکوپ الکترونی روبشی پوشش‌ها نشان می‌دهد که با افزودن نانوذرات ‌رس، میزان حفرات پوشش‌های نانوکامپوزیتی نسبت به پوشش‌های خالص کاهش ‌یافته است. همچنین با استفاده از آزمون‌های غوطه‌وری و طیف‌سنجی امپدانس الکتروشیمیایی، خواص خوردگی پوشش‌ها بررسی شد. نتایج آزمون‌های خوردگی نشان می‌دهند که مقاومت به خوردگی پوشش نانوکامپوزیتی در اثر افزودن نانوذرات ‌رس افزایش‌ یافته است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The structure and corrosion properties of polyester-clay nanocomposite coatings and effect of curing on coatings properties

نویسندگان [English]

  • Abozar Golgoon 1
  • Mahmod Aliofkhazraei 2
  • Mansor Toorani 3
  • Mohamad Hossein Moradi 1
  • Ehsan Golgoon 4

1 - Department of Materials Engineering, Tarbiat Modares University, Tehran, Iran

2 Department of Materials Engineering, Tarbiat Modares University, Tehran, Iran

3 Department of Materials Engineering, Tarbiat Modares University, Tehran, Iran

4 Department of Materials Engineering, Shiraz University, Shiraz, Iran

چکیده [English]

In this paper, structure and morphology of powder coatings created by electrostatic spraying method and also the corrosion protection properties of these coatings, were investigated. For this purpose, 5%Wt nanoclay was embedded in polyester matrix using different and continuous mixing methods. Fabricated nanocomposite powder and pure polyester powder were applied on the carbon steel by electrostatic spraying method. Morphology and structure of nanoclay was studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). SEM and TEM micrograph showed lamellar structure of nanoclay. Also the morphology and structure of the created coatings were analyzed by SEM. The results of SEM for coatings showed that the nanocomposite coatings have less pores and are more compact than pure coatings. The corrosion properties of coatings were investigated by immersion test and electrochemical impedance spectroscopy (EIS). Corrosion test results showed that the corrosion resistance of the nanocomposite coatings have increased about 30 times than pure coatings

کلیدواژه‌ها [English]

  • Electrostatic
  • Nanocomposite coatings
  • Nanoclay
  • EIS

 

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