<strong>CeO<sub>2</sub>@MWCNTs/EP</strong>复合涂层的制备与性能研究

doi:10.11902/1005.4537.2022.307

中国腐蚀与防护学报

2023, Vol. 43

Issue (5): 992-1002 CSTR: 32134.14.1005.4537.2022.307 DOI: 10.11902/1005.4537.2022.307

研究报告

本期目录 | 过刊浏览

CeO₂@MWCNTs/EP复合涂层的制备与性能研究

轩星雨, 屈少鹏(

), 赵行娅

上海海事大学海洋科学与工程学院上海 201306

Preparation and Performance of CeO₂@MWCNTs/EP Composite Coatings

XUAN Xingyu, QU Shaopeng(

), ZHAO Xingya

College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China

全文: PDF(19882 KB) HTML

摘要:

在X80钢上制备了CeO₂@MWCNTs改性的环氧复合涂层 (CeO₂@MWCNTs/EP)，研究了复合涂层的腐蚀行为和摩擦学性能。利用扫描电子显微镜(SEM)、透射电子显微镜 (TEM) 和白光干涉仪对其形貌进行表征，利用能谱仪 (EDS)、X射线光电子能谱仪 (XPS)、红外光谱 (FT-IR) 等分析其化学成分和结构，采用接触角计和显微维氏硬度计分别对复合涂层的润湿性和硬度进行测试。结果显示，CeO₂与MWCNTs之间发生物理吸附，纳米CeO₂可以改变EP的结构；CeO₂@MWCNTs有利于减少CeO₂@MWCNTs/EP复合涂层中的微孔，而当CeO₂@MWCNTs含量达到1.0%时，则发生团聚；CeO₂@MWCNTs不发生团聚时，可以提高复合涂层的耐蚀性，否则效果相反；随着CeO₂@MWCNTs含量增加，复合涂层的耐蚀性先提高后降低，当CeO₂@MWCNTs含量为0.5%时，复合涂层的腐蚀电流密度最小，与EP涂层相比降低了一个数量级；CeO₂@MWCNTs具有润滑功能，随着CeO₂@MWCNTs含量的增加，复合涂层的摩擦系数和磨损率呈下降趋势，1.0% CeO₂@MWCNTs/EP复合涂层的磨损率比EP涂层下降了64.7%。

关键词 ：涂层, 环氧树脂, CeO₂@MWCNTs, 腐蚀, 摩擦磨损

Abstract：

Epoxy composite coatings with different contents of cerium salt treated multi-walled carbon nanotubes (CeO₂@MWCNTs) were prepared on X80 steel. The corrosion behavior and tribological property of the composite coatings were studied. Meanwhile, the morphology, chemical composition and structure, as well as wettability and hardness of CeO₂@MWCNTs/EP composite coating were characterized by means of SEM, TEM and white light interferometer, EDS, XPS and FT-IR, contact angle meter and microhardness tester etc. The results show that there exist physical adsorption for the interface between nano-CeO₂ and MWCNTs in the prepared powder of CeO₂@MWCNTs, while the structure of epoxy can be changed due to the introduction of nano-CeO₂ particulates. CeO₂@MWCNTs is beneficial to reduce the micropores in the CeO₂@MWCNTs/EP composite coating, but the powders may agglomerate when the dosage reaches to 1.0%. It should be noted that CeO₂@MWCNTs in dispersive state can improve the corrosion resistance of the composite coating, but in agglomerated state which presents negative effect. The corrosion resistance of CeO₂@MWCNTs/EP composite coating first increases and then decrease with the increase of CeO₂@MWCNTs content, and among others, the corrosion current density of the coating with 0.5% CeO₂@MWCNTs/EP is the smallest, which is an order of magnitude less than that of the simple EP coating. CeO₂@MWCNTs possesses lubricating function, therefore, the friction coefficient and wear rate of the composite coating show a decreasing trend with the increasing CeO₂@MWCNTs content. The wear rate of 1.0% CeO₂@MWCNTs/EP composite coating decreases by 64.7% in comparison with the simple EP coating.

Key words： coating epoxy CeO₂@MWCNTs corrosion friction and wear

收稿日期: 2022-10-08 32134.14.1005.4537.2022.307

ZTFLH:

TB332

基金资助:国家自然科学基金(51701115);中国科学院海洋新材料与应用技术重点实验室开放基金(2016K04)

通讯作者: 屈少鹏，E-mail: spqu@shmtu.edu.cn，研究方向为金属材料及其腐蚀与防护

Corresponding author: QU Shaopeng, E-mail: spqu@shmtu.edu.cn

作者简介: 轩星雨，男，1996年生，硕士生

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引用本文:

轩星雨, 屈少鹏, 赵行娅. CeO₂@MWCNTs/EP复合涂层的制备与性能研究[J]. 中国腐蚀与防护学报, 2023, 43(5): 992-1002.
XUAN Xingyu, QU Shaopeng, ZHAO Xingya. Preparation and Performance of CeO₂@MWCNTs/EP Composite Coatings. Journal of Chinese Society for Corrosion and protection, 2023, 43(5): 992-1002.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.307 或 https://www.jcscp.org/CN/Y2023/V43/I5/992

图1 MWCNTs与CeO2@MWCNTs的微观形貌和能谱结果

图2 MWCNTs与CeO2@MWCNTs的TEM分析结果

图3 CeO2@MWCNTs的XPS谱

图4 不同CeO2@MWCNTs含量的CeO2@MWCNTs/EP复合涂层的微观形貌

图5 不同CeO2@MWCNTs含量的CeO2@MWCNTs/EP复合涂层断面Ce的 EDS

图6 MWCNTs， CeO2@MWCNTs以及不同CeO2@- MWCNTs含量的CeO2@MWCNTs/EP复合涂层的FT-IR光谱

图7 不同CeO2@MWCNTs含量的CeO2@MWCNTs/EP复合涂层的接触角测试结果

图8 不同CeO2@MWCNTs含量的CeO2@MWCNTs/EP复合涂层的电化学阻抗谱及其等效电路

表1 不同CeO2@MWCNTs含量的CeO2@MWCNTs/EP复合涂层的EIS拟合结果

图9 不同CeO2@MWCNTs含量的CeO2@MWCNTs/EP复合涂层的孔隙率变化与动电位极化曲线

表2 不同CeO2@MWCNTs含量的CeO2@MWCNTs/EP复合涂层的拟合电化学参数

图10 不同CeO2@MWCNTs含量的CeO2@MWCNTs/EP复合涂层的维氏硬度

图11 不同CeO2@MWCNTs含量的CeO2@MWCNTs/EP复合涂层的摩擦磨损结果

图12 不同CeO2@MWCNTs含量的CeO2@MWCNTs/EP复合涂层腐蚀机理示意图

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