Investigating the influence of pigmentation on the electrolyte transport properties of organic coatings using ORP-EIS
Negin Madelat (Vrije Universiteit Brussel)
Benny Wouters (Vrije Universiteit Brussel)
Peter Visser (Akzo Nobel)
Zahra Jiryaeisharahi (Vrije Universiteit Brussel)
Kristof Marcoen (Vrije Universiteit Brussel)
Shohsan T. Abrahami (TU Delft - Mechanical Engineering)
Annick Hubin (Vrije Universiteit Brussel)
Herman Terryn (Vrije Universiteit Brussel)
Tom Hauffman (Vrije Universiteit Brussel)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
In this work, the correlation between electrolyte transport properties and the variation of pigment volume concentration (PVC) in a series of organic coatings is explored. Using an odd random phase electrochemical impedance spectroscopy (ORP-EIS) approach, the diffusion of ions independent from water take-up is analysed. A higher PVC resulted in a more homogeneous coating morphology, which could be associated with a faster diffusion of ions following a Fickian regime and enhanced water uptake. In the case of lower pigment loading, the obtained heterogenous morphology of the coating introduced new challenges to the physical interpretation of the proposed electrochemical equivalent circuit.