Research Progress of Rain Erosion of Polyurethane Coating

Abstract:

Polyurethane has excellent impact resistance and chemical resistance, so polyurethane coatings are often selected to protect helicopter rotors. but the impact of rainwater when flying in rainy weather can still cause great damage to the polyurethane coating. In order to effectively improve the working life of the polyurethane coating in the rain erosion environment. This paper introduces the failure mechanism of rainwater erosion. The factors influencing the rain erosion performance of polyurethane coatings were discussed from internal and external factors respectively. And the equipment, test methods and standards of rain erosion were summarized. Finally, the problem that the rotation arm of the equipment cannot reach the rotation speed of the helicopter rotor and the incident angle of water droplets cannot be changed, and the future development direction is prospected.

• Periodical: Materials Science Forum (Volume 1061)
• Pages: 29-38
• DOI: https://doi.org/10.4028/p-rc2jls
• Online since: May 2022
• Authors: Chen Yang Sun, Jiang Yan Meng, Jin Juan Fan*, Wei Sun, Chang Kui Liu
• Keywords: Elongation at Break, Failure Mechanism, Polyurethane Coatings, Rain Erosion, Tensile Strength

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