The Properties of Low Surface Energy Ultraviolet Fluorescence Anti-creep Coatings for Space

Space grease lubricated moving parts are prone to creep and loss under high vacuum during long-term service,which seriously affects the service life and reliability of space mechanism.The ultra-low surface energy anti-creep coating is an effective way to suppress the loss of surface lubricant creep and achieve long life and high reliable lubrication.In this paper,the ultraviolet fluorescence effect,surface energy,vacuum storage stability and vacuum anti-creep properties of lubricating grease of LWFP-YG ultraviolet fluorescent anti-creep coatings were studied.The results show that the LWFP-YG ultraviolet fluorescent anti-creep coating has a lower surface energy.The surface energy of the coating formed on the smooth and clean silicon is 8.972 mN/m.When the surface roughness of the steel sheet increases from 138.7 nm to 549.8 nm,the surface energy of the coating increases from 9.114 mN/m to 10.078 mN/m.The structure of anti-creep coating is stable after vacuum storage,and the coating has good vacuum anti-climbing performance,the PFPE and MACs lubricating grease were blocked.