Article: Morphology-Dependent Delamination Performance of Poly (3,4-ethylenedioxythiophene) for Corrosion Protection on Iron
Authors: Bai, Xiaoxia & Huang, Xunfang & Zhao, Zhenhuan & Hu, Xiujie & Zhou, Shuyun & Liang, Yanping & Rohwerder, Michael.
Two different types of poly (3,4-ethylenedioxythiophene) (PEDOT) composite morphologies in organic coatings were prepared by using either PEDOT nanoparticles or PEDOT/carbon nanotubes (PEDOT/CNTs). The PEDOT additives were prepared by emulsion polymerization. The morphology of the resultant samples was characterized by scanning electron microscopy. The composite coatings were prepared by incorporating PEDOT into a polyvinyl butyral (PVB) matrix and applied on an iron substrate. The delamination behavior of the as-prepared samples for corrosion protection was characterized by the scanning Kelvin probe (SKP) technique. The SKP measurements showed that the composite coatings with PEDOT nanoparticles exhibited the best delamination resistance. This could be possibly due to the fact that, for a polarization of the interface, the solid particles have a higher overall stored charge and a good electronic connection at the interface. The performance of the composite coating with 10 vol% of PEDOT nanoparticles was significantly better than for the coatings with 5 vol% and 20 vol%.
Cite this: Bai, Xiaoxia & Huang, Xunfang & Zhao, Zhenhuan & Hu, Xiujie & Zhou, Shuyun & Liang, Yanping & Rohwerder, Michael. (2022). Morphology-Dependent Delamination Performance of Poly (3,4-ethylenedioxythiophene) for Corrosion Protection on Iron. Journal of The Electrochemical Society. 169. 10.1149/1945-7111/ac5300.