摘要
将高温热还原氧化石墨烯(TRGO)作为二维纳米填料添加到聚酰亚胺(PI)聚合物基质中,制备了不同质量分数的TRGO/PI纳米复合耐蚀涂层,采用交流阻抗谱和动电位极化曲线评估了涂层在模拟海水(3.5wt%Na Cl溶液)中的电化学腐蚀行为。结果表明:与纯PI涂层相比,添加TRGO可以显著提高涂层的电阻和腐蚀防护效率;当TRGO的添加量为0.3wt%时,对涂层耐蚀性能的增强效果最好,最大涂层电阻为1.3176×10~6?,最高腐蚀防护效率可达到99.65%,其防蚀增益与片层结构TRGO的物理阻隔性能有关。
Thermal reduced graphene oxide （TRGO） was incorporated into polyimide （PI） matrix as two-dimensional nanofillers and TRGO/PI nanocomposite anticorrosive coatings were fabricated. Then AC impedance spectroscopy and dynamic potential polarization curves were adopted to evaluate the electrochemical corrosion behavior of the obtained coatings in simulated seawater （3.5wt% NaCl solution）. The results show that the addition of TRGO significantly improves the coating resistance and corrosion protection efficiency compared with pure PI coating. Besides, the TRGO/PI composite coating with the addition of 0.3wt% TRGO shows the most excellent anticorrosive property, with the maximum coating resistance of 1.3176×10^6Ω and the highest corrosion protection efficiency of 99.65%. The enhanced anticorrosive property can be attributed to the physical barrier properties of the TRGO with lamellar structure.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2017年第12期1257-1263,共7页
Journal of Inorganic Materials
基金
国家自然科学基金(61574148
51272265
51402340
61301036)
国家重点研发计划专项项目(2016YFA0203000)~~
关键词
石墨烯
聚酰亚胺
耐腐蚀
复合涂层
graphene, polyimide, anticorrosive, composite coating
