六方氮化硼改性硅烷膜耐蚀性能研究  

Corrosion Resistance of Silane Film Modified by Hexagonal Boron Nitride

作　　者：丁玉康 陈国美 倪自丰 刘雅玄 钱善华 卞达 赵永武 DING Yukang;CHEN Guomei;NI Zifeng;LIU Yaxuan;QIAN Shanhua;BIAN Da;ZHAO Yongwu(College of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;School of Mechanical and Electrical Engineering,Wuxi Vocational Institute of Commerce,Wuxi 214122,China)

机构地区：[1]江南大学机械工程学院,无锡214122 [2]无锡商业职业技术学院机电工程学院,无锡214122

出　　处：《中国腐蚀与防护学报》2021年第6期864-870,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(51675232)。

摘　　要：采用多巴胺对氮化硼进行非共价改性,通过SEM、红外光谱和TGA对粉末进行了表征。使用浸泡法在40Cr合金钢表面制备了掺杂改性氮化硼(m BN)的硅烷复合膜,运用SEM、红外光谱、润湿性测试以及动电位极化曲线研究了硅烷复合膜的耐蚀性能。结果表明,聚多巴胺成功附着在氮化硼表面,掺杂m BN的硅烷膜厚度增大至1.812μm,m BN/BTESPT硅烷复合膜的表面接触角达到91.97°,动电位腐蚀电流密度为9.187×10^(-8)A/cm^(2),耐蚀性能相比单一硅烷膜提高了约30倍,在中性盐雾测试中表现出较好的耐蚀性。m BN通过对硅烷膜的物理填充与化学键结合,阻碍了腐蚀介质的扩散,显著增强了金属的耐蚀性能。Powders of boron nitride were non-covalently modified with dopamine, and then composite silane coatings dopped with non-covalently modified boron nitride were prepared on 40 Cr alloy steel surface via socking method. The modified powder was characterized by SEM, FTIR and TGA. The corrosion resistance of silane composite film was studied by SEM, FTIR, wettability measurement and potentiodynamic polarization curve. The results showed that the polydopamine successfully coats the boron nitride particles and adheres them onto the 40 Cr steel surface, the thickness of the m BN-doped silane film increased to 1.812 μm, and the surface contact angle of the m BN/BTESPT silane composite film reached91.97°. The corrosion current density of the composite film coated steel was 9.187×10^(-8) A/cm^(2), which implies that the corrosion resistance of the composite film was about 30 times higher than that of the bare silane film, and it showed also better corrosion resistance in the neutral salt spray test. Through the physical filling and chemical bonding of silane film, m BN hindered the diffusion of corrosion medium and significantly enhanced the corrosion resistance of metal.

关 键 词：硅烷膜 六方氮化硼 改性 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]