Study of ice-phobic behavior of hydrophobic and superhydrophobic coatings for high voltage power line components under snowfall conditions
The effect of the typology,the hydrophobicity and the roughness of coated surfaces on icephobic behavior was studied.Fluorinated alumina-based and silica-based films,hydrophobic silicon commercial paints NusilTM and slippery liquid-infused porous surfaces(SLIPS),were prepared and deposed on aluminum alloy specimens(rough and smooth).Shear stress analyses were carried out by using a custom-build electromechanically testing system,and the ice-adhesion strength of the coated samples was determined: hydrophobic properties of the surfaces lead to the decreasing in shear stress value but the presence of roughness on the surfaces caused a huge increasing of the ice adhesion strength.It was found that the ice-adhesion strength(τ)on silicone commercial paints was~16 times lower than compared to bare aluminum alloy.Some conductor segments 50-centimeter long have been coated and exposed to winter weather at the RSE Outdoor Test Facility located in the West part of the Alps,at an altitude of 950 m asl.NusilTM paints showed a rather faster snow detachment at the end of the snowfalls,while alumina-based coatings,deposed on sandblasted conductors,evidenced a delay in ice formation of several hours,in certain weather conditions where the snowflakes have particular properties as a high liquid water content or have almost a spherical shape.
hydrophobic superhydrophobic roughness water contact angle anti-icing ice adhesion strength icephobic conductor snowfall
M.Balordi M.Calicchio A.Cammi C.Chemelli M.Lacavalla P.Marcacci G.Pirovano G.Boveri F.Veronesi
RSE,Ricerca Sistema Energetico Milano,Italy ISTEC CNR,Institute of Science and Technology for Ceramics,National Research Council Faenza,Italy
国际会议
重庆
英文
1-5
2017-09-25（万方平台首次上网日期，不代表论文的发表时间）