Experimental Study On Preparation Of Superhydrophobic GH4169 Surfaces

The superhydrophobic surface which has a water contact angle of larger 150° and a siliding angle of less than 10° has the advantages of anti-icing,self-cleaning,and so on.In nature,lotus leaves and flaps are superhydrophobic surfaces.At present,the methods for preparing superhydrophobic surfaces include chemical dissolution method,chemical deposition method,and so on.However,many preparation methods have some problems,such as environmental pollution and low efficiency.Due to excellent anti-oxidation,anti-fatigue and other properties,GH4169 is widely used in aerospace.Because of its special application environment,it is of great significance to explore the preparation of superhydrophobic GH4169 surfaces.Based on the research status of superhydrophobic surfaces and theoretical analysis of wettability,the paper choosed electrochemical etching method using sodium chloride solution and sodium nitrate solution as electrolyte respectively and laser etching method to prepare superhydrophobic GH4169 surfaces.After preparation,the surfaces with good superhydrophobic properties were obtained,and the surfaces of GH4169 in different processing processes were characterized.The paper also discussed the influence of various parameters on wettability in different etching methods.Single factor experiments were used to explore the influence of current density,processing time,electrolyte concentration and etching temperature in the electrochemical etching method,and the frequency,power and scanning speed of the fiber laser marking machine in the laser etching method on the wettability of the GH4169 surfaces.Finally,the self-cleaning,corrosion resistance,abrasion resistance,anti-icing and adhesion performance of superhydrophobic GH4169 surfaces prepared by different etching methods were tested respectively.