HIREC: Super Hydrophobic Coating for Antenna, Radome and Other Public Infrastructure
Accelerated Weathering Test
The long-term stability of HIREC water repellency was measured by accelerated weathering test. The test simulates the degradation of materials exposed in the field where ultraviolet radiation, temperature, and moisture effect on it. The change of contact angle of HIREC was measured during and after 2500 hours of the test.
Sample surface radiation: 255 w/m²
Discharge voltage: 50 ± 2 V
Discharge current: 60 ± 2 A
Glass filter operation time: 2000 hours
Black panel temperature: 60 ± °C
Water jet condition: 18 min per 2 hours
Humidity: 50 ± 5 %
Test Results of Contact Angle Change in Accelerated Weathering Test
HIREC shows no abnormality during 2500 hr exposure of the accelerated Weathering test
The initial contact angle of HIREC was 152°.
HIREC maintains excellent water repellency for about 3 years.