The article presents the results of research on the influence of modifying polyurethane coatings with three types of nanofillers on their erosion resistance. Granulated electrocorundum with particle sizes of 0.6 – 0.7 mm was used as the erosive material. In the case of aged coatings, regardless of the type of nanofiller used, all polyurethane coatings modified with a nanofiller showed higher erosion resistance than unmodified coatings. Higher erosion resistance was observed in aged polyurethane coatings compared to non-aged ones. The increase in erosion resistance of aged coatings can be explained by an increase in their hardness.The process of erosive wear occurs in the case of hard particles (mineral particles, sand, dust, clumps of soil) striking the surface of an element with a certain energy.
This causes adverse phenomena leading to losses in the near-surface zone. The progressive loss of material resulting from the relative motion between the surface and the substance (or substances) in contact with it leads, consequently, to the destruction of the coatings. This wear is primarily the result of plastic deformation and material fatigue [1-5]. (…)
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Source: Logistyka Magazine
Erosion resistance of polyurethane coatings modified with nanofillers – PDF file for download