Vol. 13 No. 03 (2023): Tạp chí Vật liệu & xây dựng
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Relationship between corrosion protection and cathodic disbondment resistance of the epoxy-zinc phosphate coating

Linh Phạm Đức , Trúc Trịnh Anh , Thủy Thái Thu , Oánh Vũ Kế , Dương Nguyễn Thùy , Thùy Phạm Thu , Thắng Đàm Xuân , Vũ Phạm Gia

Keywords:

Epoxy coating
Zinc phosphate
Cathodic disbonding
Corrosion resistance

Abstract

Epoxy coating containing zinc phosphate [Zn3(PO4)2] ratios varying from 0, 10, 20 and 30 % were prepared and studied for wet adhesion, anti-corrosion and cathodic disbonding resistance. The coating anti-corrosion properties were investigated and evaluated by Electrochemical impedance spectroscopy (EIS) and salt spay test. The results show that pigment zinc phosphate ratio of 20 % and 30 % improved the anti-corrosion, wet adhesion strength and cathodic disbonding resistance for epoxy coating. The study also showed that the anti-corrosion inhibitory ability of zinc phosphate is related to the resistance to cathodic disbonding due to the formation of complex films that reduce the cathodic protection current at the defect of the coating.

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How to Cite

Phạm Đức, L., Trịnh Anh, T., Thái Thu, T., Vũ Kế, O., Nguyễn Thùy, D., Phạm Thu , T., Đàm Xuân, T., & Phạm Gia, V. (2023). Relationship between corrosion protection and cathodic disbondment resistance of the epoxy-zinc phosphate coating. Tạp Chí Vật liệu & Xây dựng - Bộ Xây dựng, 13(03), Trang 33 – Trang 38. https://doi.org/10.54772/jomc.03.2023.486

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