Investigation of the Anti-Corrosion Properties of Fluorinated Graphene-Modified Waterborne Epoxy Coatings for Carbon Steel

THE Coatings Pub Date : 2021-02-21 DOI:10.3390/COATINGS11020254

Baojie Dou, Hang Xiao, Xiuzhou Lin, Yingjun Zhang, Shixiong Zhao, Song Duan, Xiulei Gao, Zhiwen Fang

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引用次数: 19

Abstract

Waterborne epoxy resin (WEP) has been widely used as an anti-corrosive coating for metals. However, it is still a big challenge to further improve its anti-corrosion performance due to the poor barrier properties to corrosive media. In this study, fluorinated graphene (FG) was used as a filler in WEP to improve its barrier properties, which contributes to corrosion resistance enhancement. The chemical composition and microstructures of FG and FG-modified WEP were systematically analyzed, and its corrosion resistance was also studied. Results reveal that the addition of FG sheet to WEP not only can significantly improve the tensile strength of WEP coating, but also increase the barrier properties of WEP coating and block the penetration of corrosive agent throughout the coating to the interface between coating and substrate. Meanwhile, the results also declare that the F content of FG has a significant effect on mechanical properties and long-term corrosion resistance, and the performance of FG-modified WEP coating will deteriorate with the increase of F content.

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含氟石墨烯改性碳钢水性环氧涂料的防腐性能研究

水性环氧树脂(WEP)作为一种金属防腐涂料得到了广泛的应用。然而，由于其对腐蚀性介质的阻隔性较差，进一步提高其防腐性能仍然是一个很大的挑战。在本研究中，氟化石墨烯(FG)被用作WEP的填料，以改善其阻隔性能，从而有助于增强其耐腐蚀性。系统分析了FG和FG改性WEP的化学成分和显微组织，并对其耐腐蚀性能进行了研究。结果表明，在WEP中添加FG片材不仅可以显著提高WEP涂层的抗拉强度，而且可以提高WEP涂层的阻隔性能，阻断腐蚀剂在整个涂层中向涂层与基体界面的渗透。同时，FG的F含量对WEP涂层的力学性能和长期耐蚀性有显著影响，FG改性WEP涂层的性能随着F含量的增加而变差。

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