一种新型的含氧化石墨烯和硅化碳化铬的多层环氧复合结构钢结构防护涂料

IF 2.3 4区 材料科学 Q2 Chemistry Journal of Coatings Technology and Research Pub Date : 2022-07-01 DOI:10.1007/s11998-022-00643-9
Joseph Raj Xavier
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引用次数: 8

摘要

纳米复合涂层广泛应用于汽车零部件钢结构的防腐。将(3-巯基)三[2-(2-甲氧基乙氧基)乙氧基]硅烷(MPTMEES)功能化的Cr3C2包封在氧化石墨烯(GO)中,作为环氧基(EP)的高效纳米填料。采用SEM/EDX和TGA对氧化石墨烯包裹的硅化碳化铬进行了表征。采用电化学阻抗谱(EIS)和扫描电化学显微镜(SECM)研究了海水中不同重量百分比的氧化石墨烯包裹硅化碳化铬时环氧涂层对钢的保护性能。浸泡1 h后,EP-MPTMEES/Cr3C2的耐涂层性比纯基体提高43%以上。在海水中浸泡240 h后,EIS测试表明,EP-GO/ mptmee - cr3c2纳米复合涂层的耐涂层性(6340 kΩ.cm2)高于普通环氧树脂涂层(1.2 kΩ.cm2)。在EP-GO/MPTMEES-Cr3C2纳米复合涂层钢试样(1.5 I/nA)的裂纹处,铁离子的耗散最小。FE-SEM/EDX分析表明,硅化Cr3C2在降解产物中得到增强,在涂层/钢接触处形成了良好的钝化层。根据研究结果,新开发的EP-GO/ mptmee - cr3c2纳米复合涂层具有更好的防腐性能和增强的疏水性(WCA: 146°)。氧化石墨烯包裹硅化碳化铬的环氧树脂基体表现出更好的粘合能力。
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Novel multilayer structural epoxy composite coating containing graphene oxide and silanized chromium carbide for the protection of steel structures

Nanocomposite coatings have been extensively used in the manufacture of automotive components to protect against corrosion of steel structures. The (3-mercaptopropyl) tris[2-(2-methoxyethoxy) ethoxy] silane (MPTMEES) functionalized Cr3C2 was encapsulated with graphene oxide (GO) as an efficient nanofiller in the epoxy matrix (EP). The silanized chromium carbide wrapped in graphene oxide was tested by SEM/EDX and TGA. Electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM) were used to study the protective performance of epoxy coating on steel in the presence of varying weight percentages of graphene oxide wrapped silanized chromium carbide in seawater. After 1 h of immersion, the coating resistance of EP-MPTMEES/Cr3C2 was determined to be over 43% higher than that of pure matrix. After 240 h in seawater, EIS tests revealed that EP-GO/MPTMEES-Cr3C2 nanocomposite coatings had a higher coating resistance (6340 kΩ.cm2) than ordinary epoxy (1.2 kΩ.cm2) coatings. Because of the coated substrate’s improved resistance to anodic dissipation, the least dissipation of ferrous ions was found at the crack of the EP-GO/MPTMEES-Cr3C2 nanocomposite coated steel specimen (1.5 I/nA). The silanized Cr3C2 was reinforced in the degradation products, forming an excellent passive layer at the coating/steel contact, according to FE-SEM/EDX analysis. The newly developed EP-GO/MPTMEES-Cr3C2 nanocomposite coating had improved corrosion protection and enhanced hydrophobic characteristics (WCA: 146°), according to the findings. The epoxy matrix with graphene oxide wrapped silanized chromium carbide demonstrated improved adhesive capabilities.

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来源期刊
Journal of Coatings Technology and Research
Journal of Coatings Technology and Research CHEMISTRY, APPLIED-MATERIALS SCIENCE, COATINGS & FILMS
CiteScore
4.40
自引率
8.70%
发文量
0
期刊介绍: Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.
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