Enhancement of the Anti-Corrosion Efficacy of Epoxy-Based Coatings through functionalized graphene structures

سال انتشار: 1403
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 49

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شناسه ملی سند علمی:

ICNN10_018

تاریخ نمایه سازی: 25 اردیبهشت 1404

چکیده مقاله:

One of the primary challenges encountered by the marine industry is the corrosion of equipment. To mitigate this issue, protective coatings, including metallic coatings, cathodic coatings, and paints, have been identified as effective solutions. Among these alternatives, paints are especially advantageous due to their cost-effectiveness, ease of application, and reparability. Epoxy coatings, in particular, are widely utilized due to their high resistance to corrosive environments. To further enhance the anti-corrosion performance of epoxy coatings, additives such as graphene-based materials are employed. However, challenges remain regarding the dispersibility of graphene materials within the epoxy matrix, as well as the enhancement of anti-corrosion properties in saline solutions, which present considerable difficulties. In this study, ۲D graphene with varying functional groups and concentrations (۰%, ۰.۵%, and ۰.۷۵%) were incorporated into an epoxy coating. A coating was applied to ۳۰۴ stainless steel, and the coated samples were analyzed using Electrochemical Impedance Spectroscopy (EIS) and Tafel tests to determine their corrosion behavior in a ۳.۵% NaCl solution. The results indicated that the coating containing ۰.۷۵% by weight of functionalized graphene exhibited superior performance, with a ۷۰% increase in corrosion resistance compared to the graphene-free coating and enhanced dispersibility within the epoxy matrix. This enhancement is attributed to the formation of a physical barrier against the penetration of corrosive ions by the graphene sheets, as well as the optimal concentration of oxygen-functional groups (۲۵ wt% of graphene) that facilitate effective dispersion. Consequently, these findings suggest that such modified epoxy coatings may serve as promising candidates for applications in the marine industry.

نویسندگان

Zahra Khodakarami

Department of Materials and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran

Arash Ghazitabar

Department of Inorganic Pigments and Glazes, Institute for Color Science and Technology, Tehran, Iran

Malek Naderi

Graphene and Advanced Materials Laboratory (GAMLab.), Tehran, Iran