稀土铈改性石墨烯<strong>/</strong>水性环氧树脂复合涂料涂装技术研究

doi:10.11902/1005.4537.2023.012

中国腐蚀与防护学报

2024, Vol. 44

Issue (1): 107-118 CSTR: 32134.14.1005.4537.2023.012 DOI: 10.11902/1005.4537.2023.012

研究报告

本期目录 | 过刊浏览

稀土铈改性石墨烯/水性环氧树脂复合涂料涂装技术研究

陈施润, 陈文革(

), 钱颖, 张辉

西安理工大学材料科学与工程学院西安 710048

Preparation and Perfromance of Rare Earth Cerium Modified Graphene Oxide / Waterborne Epoxy Resin Composite Coating

CHEN Shirun, CHEN Wenge(

), QIAN Ying, ZHANG Hui

School of Material Science and Engineering, Xi'an University of Technology, Xi'an 710048, China

引用本文:

陈施润, 陈文革, 钱颖, 张辉. 稀土铈改性石墨烯/水性环氧树脂复合涂料涂装技术研究[J]. 中国腐蚀与防护学报, 2024, 44(1): 107-118.
Shirun CHEN, Wenge CHEN, Ying QIAN, Hui ZHANG. Preparation and Perfromance of Rare Earth Cerium Modified Graphene Oxide / Waterborne Epoxy Resin Composite Coating[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(1): 107-118.

全文: PDF(15984 KB) HTML

摘要:

将制备的稀土铈改性石墨烯/水性环氧树脂复合涂料，以喷涂、滚涂和刷涂的方式在Q235钢表面进行涂覆，研究其组织结构及防腐性能。结果表明，稀土铈或CeO₂以纳米颗粒状化学负载在石墨烯表面，改性石墨烯以小片层均匀分布在环氧树脂中。复合涂料涂覆于Q235钢表面后存在片层状石墨烯的堆叠结构。截面断口呈现河流状“银纹”。不同涂装方式制备的复合涂层的防腐机理为，喷涂法依靠高速运动的气体将雾化的涂料液滴冲击到基体表面并快速聚集、铺展成膜，在净化基体表面的同时提高涂层与基体的结合。滚涂法依靠线棒涂布器、刷涂法依靠软毛刷使涂层与基体结合，涂膜中的涂料分子易堆叠，表面易形成微孔。测得涂层附着力为0~1级，硬度达2H，面粗糙度~2 μm，腐蚀速率为1.565 × 10^-4~5.889 × 10^-3 mm/a。其中，喷涂法制备的涂层综合性能最好。

关键词 ：稀土改性, 石墨烯, 水性涂料, 涂装技术

Abstract：

The prepared rare earth cerium modified graphene/waterborne epoxy resin composite coating was applied on the surface of Q235 steel by spraying, rolling and brushing respectively, then of which the structure and corrosion resistance in 3.5%NaCl solution were studied. The results showed that as nano particles, rare earth cerium or CeO₂ was chemically deposited on the surface of graphene, while the modified graphene was uniformly distributed in epoxy resin as small lamellae. The applied composite coating on Q235 steel presents a stacked structure of graphene lamellae, while the fractured surface of the coating presents a pattern of river-like silve stripes. The formation of the composite coating applied by different methods may be described as that: the spraying method relies on the high-speed moving gas to impact the atomized coating droplets onto the surface of the substrate and quickly gather and spread them into a film, which improves the combination of the coating to the substrate while purifying the surface of the substrate. The roller coating method relies on the wire rod coater, and the brush coating method relies on the soft brush to combine the coating with the substrate. Thus molecules in the coating are easy to stack, and mocropores may easy form on the surface. The adhesion of the coating was measured to be 0-1, the hardness was 2H, and the surface roughness was ~2 μm. The corrosion rate is 1.565 × 10^-4-5.889 × 10^-3 mm/a. It is found that the coating applied by spraying method has the best comprehensive performance.

Key words： rare earth modification graphene water based coating decorate method

收稿日期: 2023-01-19 32134.14.1005.4537.2023.012

ZTFLH:

TQ637

基金资助:陕煤联合基金(2019JLM-2);西安市科技计划项目(21XJZZ0042)

通讯作者: 陈文革，E-mail：wgchen001@263.net，研究方向为功能材料

Corresponding author: CHEN Wenge, E-mail: wgchen001@263.net

作者简介: 陈施润，女，1999年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2023.012 或 https://www.jcscp.org/CN/Y2024/V44/I1/107

图1 稀土铈改性石墨烯和含改性石墨烯水性环氧树脂复合涂料的微观结构以及XRD和FT-IR分析

图2 稀土铈改性石墨烯/水性环氧树脂复合涂料的SEM图

图3 喷涂、滚涂和刷涂3种涂装方式制备的复合涂层的表面和截面SEM图

表1 喷涂、滚涂和刷涂3种涂装方式制备的复合涂层的性能测试结果

图4 几种润湿模型示意图

图5 喷涂、滚涂和刷涂3种涂装方式制备的复合涂层的三维图像

图6 喷涂、滚涂和刷涂3种涂装方式制备的环氧涂层与复合涂层的极化曲线

图7 喷涂、滚涂和刷涂3种涂装方式制备的环氧涂层与复合涂层的电化学阻抗谱及等效电路拟合图

表2 涂层电化学阻抗谱拟合参数

图8 喷涂、滚涂和刷涂3种涂装方式制备的复合涂层的防腐机制示意图

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