Studying the water permeation in coatings

The objective of this new work was to develop and evaluate experimental approaches using different analytical techniques to measure the permeability, diffusivity, and solubility of water in model coatings.

These properties are of primary relevance in studies of coatings for corrosion protection. For water permeation measurements, test rigs were designed and prepared to facilitate measurements by microcalorimetry, gravimetry, and thermogravimetric analysis. For sorption measurements, films were prepared in various thicknesses to allow a proper analysis with Fourier-transform infrared spectroscopy in transmission mode and gravimetry. All methods were successful in determining water uptake kinetics.

The work was published in Journal of Coatings Technology and Research, Volume 17, 2020.

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