Research For Preparation Technology Of Stainless Steel Base Superhydrophobic Surface

Micro mechanical gyro rotor stability plays a decisive role for promoting gyro main performance.This article is based on stainless steel-304 as the research object, through chemical corrosion and high temperature oxidation to modify its surface structure, aimed at the preparation technology of micro-nano binary composite structure which is similar to a lotus leaf surface to stainless steel-304’s super hydrophobic surface.That is applied to the liquid floating rotor gyroscope reduce viscous resistance, improve the stability of the gyro rotor.By hydrofluoric acid corrosion,prepared micron scale stainless steel surface coarse structure. Adopting orthogonal experiment method, researched the influence of temperature and time on the surface morphology. The experiment results show that Hydrofluoric acid corrosion was under the temperature of 40℃, 40% of HF solution for 105 min, the micron scale rough structure with a small amount of villous nanostructures scattered, used 1H,1H,2H.2H-perfluorodecyltrimethoxysilane modifying surface of the sample, obtained the surface contact Angle was160.9 ° stainless steel super hydrophobic surface.On the basis of hydrofluoric acid corrosion, adopted high temperature oxidation, grown nanoscale bump structure at the micron scale surface topograph. By adjusting the oxidation temperature, studide the effect of nanoscale structure growth on the surface. The experiment results show that at 600 ℃ temperature, continuous ventilation the mixed gas which consist of N2:O3 was 3:1(nitrogen flow was 24 ml/min, oxygen flow was 8 ml/min) for 10 h, on the micron scale rough structure villous nanometer institutions disappeared, and grown a lot of nanoscale mastoid, uniform, closely packed, the stainless steel surface microstructure was very similar to the lotus leaf surface, used 1H,1H,2H.2H-perfluorodecyltrimethoxysilane modifying surface of the sample, surface water contact angle was 168.6 °, compared with the hydrofluoric acid corrosion one step preparation of super hydrophobic surface contact angle increasing nearly 8 °.