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Home  > Raw materials & technologies  > Applications  > Protective & Marine coatings  > Floating in freshwater may affect antifoul...

Thursday, 19 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Floating in freshwater may affect antifouling performance

Wednesday, 14 December 2011

In a new study, the water uptake of different antifoulings was found to be much higher in freshwater than in seawater.

The performance of antifouling coatings formulated for use in seawater might be affected, when the part-built ships are completed while floating in freshwater. Source: Slawomir Prycjp -  Fotolia.com
The performance of antifouling coatings formulated for use in seawater might be affected, when the part-built ships are completed while floating in...

Many ships are now built in Asian shipyards, some of which are located on rivers. In some cases, the part-built ships are completed while floating in freshwater. It is not clear how this will affect the performance of antifouling coatings which have been formulated for use in seawater. In a technical paper, which will appear in the January issue of the EUROPEAN COATINGS JOURNAL, commercial antifoulings were studied both as paints and as binder systems from which the pigments had been centrifuged out. The water uptake of four silyl acrylate and six ion exchange hydrolysing coatings was examined. In all cases, the uptake of water and consequent film swelling was greater in fresh water than salt. However, variations between the coatings were considerable.

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