Diffusion of sulfuric acid in protective organic coatings

Ting Wang, Victor Buhl Møller, Kim Dam-Johansen, Sarah M. Frankær, Søren Kiil

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Organic protective coatings and linings are widely used to prevent corrosion in industrial processes. However, the permeation of aggressive chemicals through coatings can induce failures. These are described in the literature, but rarely quantified. To measure the diffusion rates of aggressive chemicals through organic coatings, a diffusion cell was designed. The diffusion cell designed is simple, small and suitable for scaling up to a battery of cells. A concentration profile of H3O+ through epoxy coatings was achieved for sulfuric acid aqueous solutions, which can be used to estimate diffusion coefficients of H3O+. Typically, Crank’s time-lag method is used to estimate the diffusion coefficients but more complicated modelling is required for sulfuric acid solutions. Future modelling work is needed to estimate diffusion behavior of sulfuric acid.
Original languageEnglish
Publication date2017
Number of pages4
Publication statusPublished - 2017
Event13th Coatings Science International Conference 2017 - Hotels van Oranje, Noordwijk, Netherlands
Duration: 26 Jun 201730 Jun 2017


Conference13th Coatings Science International Conference 2017
LocationHotels van Oranje

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