The main function of anti-corrosion coatings is to protect steel structures against corrosion and chemicals. For the corrosion protection of steel structures situated in the most severe environmental conditions, predominantly two-component epoxy type of coatings are being used as the anti-corrosive protection layer. MicaFort improves the function of these industrial protective coatings.
MicaFort as an anti-corrosion coating additive in paint
- a very high aspect ratio,
- a narrow particle size distribution,
- retaining of platy particles even after processing to ultrafine powder,
- lower density, lower weight and lower formulation costs compared to commonly used platy fillers.
In general, flat, platy particles overlap in a film and prevent water, oxygen or other chemicals to reach the metal basis directly, meaning the time for corrosion stimulators to start their work is increased. The addition of such platy additives in rust prevention, anti-corrosive and concrete paints ensures optimal performances for surface protection.
Testing MicaFort in corrosion resistant coatings
We have completed an extensive testing programme throughout 2015 where MicaFort in corrosion resistant coatings was tested. We aimed to show the differences in the corrosion protective performance of Phlogopite and Muscovite Mica compared to other platy mineral fillers in a barrier coating.
The tests have been run by Electrochemical Impedance Spectroscopy (EIS) method and salt spray testing. The first mentioned has recently been introduced as a fast and reliable method to assess the anti-corrosive properties of a coating system. To prove the results, LKAB Minerals Research and Development team has also conducted extensive and time consuming salt spray testing, fortunately producing the same results. The mineral filler has only been incorporated into an intermediate coat.