导电云母/二氧化钛复合材料增强富锌涂层防腐性能研究
Study on the enhancement of corrosion protection performance of zinc-rich coatings by conductive mica/titanium dioxide composites
采用溶胶-凝胶法和水热法合成了导电云母/锐钛矿型二氧化钛(ACT)和导电云母/金红石型二氧化钛(RCT)复合材料,将复合材料作为填料添加到富锌涂层中,通过扫描电子显微镜(SEM)、X射线衍射(XRD)、交流阻抗、动电位极化、盐雾试验、Mott-Schottky曲线、功函数及氧还原反应等测试对复合材料和涂层防腐性能及机理进行分析。实验结果表明添加导电云母/二氧化钛复合材料能显著提升富锌涂层的防腐效果,并且ACT防腐效果优于RCT。锌粉和填料间会发生电子转移,促进锌粉的腐蚀,加速氧气等腐蚀介质的转化,避免其进一步腐蚀基材,起到化学屏蔽作用,增强了富锌涂层的防护作用。
Conductive mica/anatase TiO2 (ACT) and conductive mica/rutile TiO2 (RCT) composites were synthesized via sol-gel and hydrothermal methods and incorporated as functional fillers into zinc-rich coatings.The corrosion protection performance and underlying mechanisms of the composites and coatings were investigated using scanning electron microscopy (SEM),X-ray diffraction (XRD),electrochemical impedance spectroscopy,potentiodynamic polarization,salt spray tests,Mott-Schottky curves,work function measurements,and oxygen reduction reaction tests.The experimental results demonstrate that adding conductive mica/TiO2 composites significantly enhances the corrosion resistance of zinc-rich coatings,with ACT exhibiting superior protective performance compared to RCT.Electron transfer occurs between zinc particles and the fillers,which promotes the corrosion of zinc and accelerates the conversion of corrosive species such as oxygen,thereby suppressing their further attack on the substrate.This process provides a chemical shielding effect and effectively improves the overall protective performance of zinc-rich coatings.
导电云母 / 二氧化钛 / 富锌涂层 / 腐蚀促进作用 / 化学屏蔽
conductive mica / titanium dioxide / zinc-rich coatings / corrosion-promoting effect / chemical shielding
| [1] |
侯保荣, 张盾, 王鹏. 海洋腐蚀防护的现状与未来[J]. 中国科学院院刊, 2016, 31(12):1326-1331. |
| [2] |
韩恩厚, 陈建敏, 宿彦京, |
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
赵振涌, 陈玲, 钟杰. 石墨粉对低锌含量水性环氧富锌漆阴极保护性能的影响[J]. 电镀与涂饰, 2014, 33(18):774-777. |
| [10] |
|
| [11] |
刘敏, 赵书彦, 刘福春, |
| [12] |
|
| [13] |
张心宇. 半导体材料/金属偶合体系的腐蚀机理研究[D]. 大连: 大连理工大学, 2020. |
| [14] |
王荣荣, 吕珺, 郭凌坤, |
| [15] |
|
国家自然科学基金项目(52571068)
新疆“揭榜挂帅”项目(2023JBGS01)
/
| 〈 |
|
〉 |