Marine coatings

MicaFort increases barrier formation and corrosion protection in marine coatings for a longer service life with exceptional shielding properties for steel structures such as ships, bridges or offshore windmills with a steel foundation.

Mica is a naturally occurring inert mineral with a very high aspect ratio; the mineral platelets remain platy particles even after processing has reduced the raw material to ultra-fine powder. High aspect ratio MicaFort products provide very effective barrier formation in coatings to increase the performance of these in marine coatings even under the most severe conditions such as in marine applications.

The Mica particles orientate themselves within the coating parallel to the substrate ensuring the coating longevity and resistance to chemicals, salt water or other aggressive substances. MicaFort produced from Muscovite Mica is naturally colourless enabling the white, pale and primary shades of coatings to be manufactured without the addition of expensive pigments.

Platy Mica for barrier formation also allows bright colours in marine coatings.

MicaFort improves corrosion resistance

The permeability of the coating film is greatly reduced with the addition of MicaFort as the particles form an impenetrable barrier when applied to the steel structure. The Mica particles align in a parallel overlapping formation. This barrier will prevent water vapour transmission and stop aggressive chemical ingress to the resin system which will significantly reduce the corrosion process on the underlying substrate.

Studies of LKAB Minerals have shown that by using MicaFort in the ‘build coat’, the barrier properties of the marine paint are significantly increased compared to traditional formulated coatings.

Service Life Extension

By including high levels of MicaFort into water based coatings the flash rusting (where rest discolours the coating and acts as a catalyst for extensive corrosion to take place) is significantly inhibited. The MicaFort barrier ensures low moisture penetration into the coating film and increases the coating film integrity as it inhibits the corrosion process to the substrate and provides resistance to weathering and UV degradation.

Marine coating containing MicaFort applied to a hull

MicaFort product portfolio for marine coatings

LKAB Minerals manufactures very high quality products and our portfolio of MicaFort grades with a high aspect ratio (between 80 to 120) is due to the developments and customisations we have completed for the coatings industry.  

Application expert

Steve Banahan
Business Manager

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