A Review of Dispersion Methods of Graphene and Its Applications in Waterborne Epoxy Zinc-rich Coatings

被引：0
|
作者：
Gui X. [1 ]
Cheng X. [1 ]
Li P. [1 ]
Gao G. [1 ]
Sun L. [2 ]
Yi H. [2 ]
机构：
[1] School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing
[2] Redbud Innovation Institute of Erdos, Inner Mongolia, Ordos
来源：
Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 03期
关键词：
anticorrosion mechanism; corrosion; graphene; waterborne zinc-rich coating;
D O I：
10.11896/cldb.22060047
中图分类号：
学科分类号：
摘要：
Graphene has attracted attention as a substrate for anticorrosion coatings owing to its large specific surface area, low chemical reactivity, extraordinary mechanical, thermal, and electrical properties, and good physical barrier properties. Environmentally friendly graphene waterborne zinc-rich coatings are among the most attractive anticorrosion coatings. However, the large specific surface area of graphene and van der Waals interactions between layers usually result in an irreversibly agglomerated structure in water and common organic solvents, complicating their use and liquid phase processing and limiting their potential applications. Therefore, methods to improve the dispersion of graphene in water-based solvents or polymer matrices are required. This review primarily focuses on the role of graphene in waterborne epoxy zinc-rich coatings. First, the effects of dispersion on the dispersibility of graphene in water-based coatings, particularly water-based epoxy coatings, and their applicability are compared and discussed. Second, the anticorrosion properties of graphene epoxy zinc-rich coatings are summarized based on existing literature. The effects of graphene type, content, and its relative ratio to zinc powder on the anticorrosion performance of coatings are discussed. Finally, other topics covering the fundamentals of protection mechanisms, performance evaluation, challenges, and future research directions on zinc-rich epoxy composite coatings are briefly discussed. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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