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26. Oct 2020 | Application Areas

Chromate ion transport in epoxy films: Influence of barium sulfate particles

In a new work, the mechanism of chromate ion transport in epoxy film with BaSO4 particles has been investigated.

A transport mechanism of anticorrosive pigment species in polymer films was investigated. 
Image source: PRILL Mediendesign – (symbol image).

In the study, a transport mechanism of anticorrosive pigment species (i.e. chromates) in polymer films was investigated. This mechanism plays a crucial role in the performance of anticorrosive polymer coatings which relays on leaching of active anticorrosive species from sparingly soluble pigment particles distributed in the coating. Except for anticorrosive pigments other particles are included in coatings such as pigments with different functions or fillers.

Filler particles with no anticorrosive function

The goal of the work was to investigate how filler particles with no anticorrosive function (i.e. BaSO4) could be involved in formation of the pathways for chromate ion transport. Polymer films containing BaSO4 particles with different pigment volume concentration (PVC) were exposed to chromate solution allowing migration of chromate species.

The findings have been published in Progress in Organic Coatings, Volume 147, October 2020.

European Coatings Journal


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