Resistance to Erosive Wear of Epoxy-Polyurethane Coating Modified With Nanofillers

Abstract

The paper presents results of investigation on the erosive wear kinetics of epoxy-polyurethane coatings modified with alumina or silica nanoparticles, aged climatically for three years. Destruction of coating surface layers due to natural weathering caused a decrease of their erosive wear resistance. Modification of the composition of polyurethane (surface) layer with nanofiller caused the remarkable increase of erosion resistance. Epoxy-polyurethane coatings with nanosilica modified surface layer, showed the highest erosive wear resistance of all investigated coatings.

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“…Kodnarowska et al developed three‐layered epoxy‐PU coatings (epoxy, interlayer epoxy, modified PU with 3.5 wt% alumina nanoparticles or silica nanoparticles). The coatings produced by air spraying were tested for erosive wear after 3 years natural weathering.…”

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“…The study of [41] revealed that the additions of nano-SiO 2 in the polymer coating could enhance the abrasion and scratch resistance, hardness and strength. Moreover, other nanoparticles such as SiC, ZrO 2 , ZnO, Al 2 O 3 , and TiO 2 were also used for the enhancement of the coating properties [45,46,47]. Kotnarowska et al [46] evaluated the performance of the unmodified epoxy-polyurethane coating and epoxy-polyurethane coatings modified with silica or alumina nanoparticles over three years.…”

“…Moreover, other nanoparticles such as SiC, ZrO 2 , ZnO, Al 2 O 3 , and TiO 2 were also used for the enhancement of the coating properties [45,46,47]. Kotnarowska et al [46] evaluated the performance of the unmodified epoxy-polyurethane coating and epoxy-polyurethane coatings modified with silica or alumina nanoparticles over three years. From the result analysis, it was found that the modified epoxy-polyurethane coatings indicated higher erosive wear resistance than the other two coatings as shown in Figure 5.…”

“…From the result analysis, it was found that the modified epoxy-polyurethane coatings indicated higher erosive wear resistance than the other two coatings as shown in Figure 5. Research also indicated that the nanoparticles inside the coating layer filled the pores and suppressed the development of cracks over the time interval [46].…”

“…Nanomaterials can display self-healing properties which make them more effective in terms of longer-term sustainability [46,108]. However, in the future, the nanomaterials could identify component damage on time and help prevent failures.…”