关键词: Ti-6Al-4V（TC4）, 超疏水, 抑冰, 耐腐蚀, 耐磨

Abstract:

Aircraft ice accumulation is a huge threat to the safe operation of high-performance aircraft and one of the main causes of aircraft crashes. Compared with the traditional passive defrosting and de-icing method， the functionalization of micro-texture on the surface is a method to achieve active anti-icing in terms of mechanism， which has been widely recognized and widely used. But the macroscopic application performance such as corrosion resistance and wear resistance of the surface after micro-texture needs to be thoroughly studied. Based on laser micro-texting technology， the triangular texture micro-nano structure was constructed with nanosecond lasers with scanning speeds of 50， 100， 150， 200 and 250 mm/s on the surface of Ti-6Al-4V specimens of aviation materials. Scanning electron microscope and confocal electron microscope were used to characterize the micro-texture morphology， element content and roughness of the micro-texture surface. The static/dynamic wetting characteristics of the micro-texture surface were analyzed by contact angle measuring instrument， and the freezing behavior of static water droplets on the microstructure surface was studied by the low-temperature microscopy experimental platform. Moreover， the wear and corrosion resistance of the microstructure surface was studied by self-made cyclic friction experimental system and electrochemical workstation. The results show that the surface of the micro-texture with a scanning speed of 100 mm/s has the best delayed water droplet freezing performance， the best hydrophobic and weather resistance under cyclic friction， but the worst surface corrosion resistance. This is due to the rich microtopology and morphology of the surface， which increase the thermal resistance of the surface and delay the freezing time of the surface droplets； but in the weak acid corrosion environment， the rich micro-texture morphology of the surface reduces the adsorption inhibition of oxide hydration products such as titanium hydroxide and titanium oxide hydroxide， and shows strong activity.

Key words: Ti-6Al-4V(TC4), superhydrophobic, ice suppression, corrosion resistance, wear resistant