Lei Yanhua, Qiu Zhichao, Liu Jiurong, Li Dongdong, Tan Ning, Liu Tao, Zhang Yuliang, Chang Xueting, Gu Yanhong, Yin Yansheng
Institute of Marine Materials Science and Engineering, College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China.
Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil & Gas Development, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
Polymers (Basel). 2019 May 10;11(5):850. doi: 10.3390/polym11050850.
The corrosion behavior of zinc-rich epoxy primers or paints (ZRPs) with different conducting polyaniline-grafted graphene (PANI/Gr) contents was investigated. Conductivity of the formed PANI/Gr nanosheets was significantly improved by employing the Gr as the inner template to synthesize the PANI. The protective properties and electrochemical behavior of coatings with artificial defects were investigated by monitoring the free corrosion potential versus time and by using localized electrochemical impedance spectroscopy (LEIS). A synergetic enhancement of the physical barrier role of the coating and the zinc sacrificial cathodic protection was achieved in the case of ZRP including PANI/Gr nanosheets. In addition, the ZRP mixed with the PANI/Gr at a content of 0.6% exhibited the best anticorrosion performance across the range of investigated PANI/Gr contents.
研究了具有不同导电聚苯胺接枝石墨烯（PANI/Gr）含量的富锌环氧底漆或涂料（ZRPs）的腐蚀行为。通过使用Gr作为内模板合成聚苯胺，显著提高了形成的PANI/Gr纳米片的导电性。通过监测自然腐蚀电位随时间的变化以及使用局部电化学阻抗谱（LEIS），研究了具有人工缺陷涂层的防护性能和电化学行为。在含有PANI/Gr纳米片的ZRP情况下，实现了涂层物理屏障作用和锌牺牲阴极保护的协同增强。此外，在研究的PANI/Gr含量范围内，与0.6%的PANI/Gr混合的ZRP表现出最佳的防腐性能。
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