| In recent years,the application of film technology in daily life is becoming more and more mature.The combination of electrodeposition technology and nano surface engineering technology has made the research of surface nano properties develop rapidly.Adding nanomaterial technology to traditional film technology can not only get relatively stable performance of nano-structure film,but also its wear resistance and corrosion resistance will be significantly improved compared with the traditional technology.Among them,the surface flatness,film ability,flexibility and hardness of electrodeposited Ni-Fe films are higher than those of single bright Ni film,so it is often used as protective material and wear-resistant film in life.Because the content of Fe in Ni-Fe film is up to about 50%,it not only reduces the use of Ni metal,but also helps to reduce the production cost and improve the use efficiency of metal.Therefore,using the combination of electrodeposition and nano surface engineering technology to improve the wear resistance and corrosion resistance of the original metal film by introducing nanoparticles with different phases into the metal film has high research value.In order to explore this problem,this paper studies the preparation of nickel iron film and nickel iron silicon carbide composite nano film on copper substrate in the plating solution with sulfate as the main salt solution,and systematically explores their wear resistance and corrosion resistance.The main contents include:(1)Effects of different process parameters on the surface morphology and structure of Ni-Fe-Si C film.The Ni-Fe film and Ni-Fe-Si C film prepared at different temperatures and current densities were studied,and their morphology and structure were discussed.The material surface was carefully analyzed by means of scanning electron microscope,X-ray diffraction analysis and Raman spectroscopy,and the relationship between its composition and wear resistance and corrosion resistance was deeply studied by energy spectrometer.It is proved that the change of current density in the range of 2?6 A/dm~2 has little effect on the flatness of the film surface.The film formed on the surface is the brightest and tidy when the deposition temperature is 60?70?.When the doping of Si C nanoparticles in the plating solution is changed,the deposition environment of the plating solution will gradually change from unstable state to stable state with the increase of Si C content,so the local area of the film surface is more prone to crack at low concentration.(2)The Ni-Fe-Si C film doped with Si C nanoparticles was prepared.Through comparative test and variable control method,it was confirmed that its overall performance was superior to the Ni-Fe alloy film without Si C nanoparticles.The wear resistance and corrosion resistance of Ni-Fe-Si C film prepared at different current density and temperature were obtained.It was determined that the bath temperature was 60?,p H=3.8,The corrosion resistance is the best when the current density is 3 A/dm~2,the corrosion potential is-0.8325 V,the wear resistance is the best when the current density is 4 A/dm~2,the Vickers hardness is 573.54 HV and the friction coefficient is 0.6091.(3)The wear resistance and corrosion resistance of Ni-Fe-Si C film deposited in the plating solution doped with different concentrations of Si C nanoparticles are further explored.The relationship between the properties of Ni-Fe-Si C film and different concentrations of Si C nanoparticles is systematically analyzed.It is proved that the wear resistance of Ni-Fe-Si C film obtained in the sulphonate solution doped with 10 g/L Si C is relatively good,Its corrosion resistance is the best. |
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