بررسی اثر هیبرید نانولایه های گرافن اکساید /تالک بر آبگریزی و مقاومت به خوردگی طولانی مدت پوشش اپوکسی بر زیرآیند فولادی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیمی کاربردی، دانشکده علوم پایه، دانشگاه گیلان، رشت، ایران، صندوق‌پستی: 13776-41996

2 مرکز تحقیقات راه، مسکن و شهرسازی، تهران، صندوق‌پستی: 1696-13145

چکیده

در این تحقیق، هدف تهیه ی یک نانوساختار هیبریدی شامل MLGO و تالک با خاصیت آب گریزی و بدست آوردن یک پوشش اپوکسی مقاوم به خوردگی با خاصیت چسبندگی بالا به بستر فولاد در ترکیب درصدهای وزنی پایین هست که مورد بررسی دقیق و طولانی مدت خواص مقاومت به خوردگی قرار گرفت. سه پوشش اپوکسی حاوی 5/0، 1 و5/1درصد وزنی MLGO/Talc تهیه و با استفاده ازآزمونهای مه نمکی، طیفسنجی امپدانس الکتروشیمیایی، پلاریزاسیون، زاویه تماس، آنالیزFT-IR ، AFM و آنالیز TGA مورد بررسی قرار گرفتند. نتایج حاصل از این آنالیز ها و تحلیل و بررسی آن ها نشان دادند که در حضور 1 درصد وزنی از MLGO/Talc بیشترین کارایی مقاومت به خوردگی حاصل می شود. بر اساس تست زاویه تماس آب، مقدار زاویه تماس 03/94 در این نانوپوشش بیانگر خاصیت آبگریزی نسبتاً بالا است. همچنین بعد از 10 ماه غوطه وری در محلول سدیم کلراید 5/3% وزنی مقاومت امپدانس نانوپوشش مذکور بیش از 108 Ω cm2 بود که نشان دهنده ی کارایی بالای حفاظت از خوردگی این نانوپوشش است.

کلیدواژه‌ها

عنوان مقاله [English]

Investigation of the Effect of Hybrid Multi-layered Graphene Oxide/talc on Hydrophobicity and Long-term Corrosion Resistance of Epoxy Coatings on Steel Substrates

نویسندگان [English]

  • S. Hosseini Keleshteri 1
  • S. Mohammadi 1
  • Sh. Shahidi 2
1 Department of Chemistry, Faculty of Science, University of Guilan, P.O. Box: 41996-13776, Rasht, Iran
2 Organic Chemistry, Road, Housing and Urban Development Research Center, P.O.Box: 13145-1696, Tehran, Iran
چکیده [English]

This research aims to prepare a hybrid nanostructure including multi-layered graphene oxide and talc (MLGO/Talc) with hydrophobicity to obtain a corrosion-resistant epoxy coating with high adhesion to the steel substrate in low weight percentages. This coating was subjected to a detailed and long-term corrosion study. Three epoxy coatings containing 0.5, 1.5 and 1.5 wt. % of MLGO/Talc were prepared and analyzed using a salt spray, electrochemical impedance spectroscopy, polarization, contact angle, Fourier transform infrared spectroscopy, Atomic force microscopy, and Thermogravimetric analysis. Their analysis showed that the highest corrosion resistance performance is obtained in the presence of 1 wt. % of MLGO / Talc. Based on the water contact angle test, the contact angle value of 94.03 in this nano-coating indicates a hydrophobic property. Also, after 10 months of immersion in sodium chloride solution, 3.5 % by weight, the impedance resistance of the nano-coating was more than 108 Ω cm2, which indicates the high corrosion protection efficiency of this nano-coating.

کلیدواژه‌ها [English]

  • Multi
  • layered graphene oxide
  • talc nano
  • hybrid Hydrophobicity Adhesion Long
  • term corrosion resistance Epoxy Carbon steel

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