In order to provide a theoretical basis for the preparation of electrode and the degradation of salicylic acid Ni - based Ag - Cu alloy electrodes were prepared by electrodeposition method, which was further applied in the degradation process of salicylic acid. The electrochemical properties of the Ni - based Ag - Cu alloy electrodes with different molar ratios of Ag - Cu were studied. Under the same plate spacing, plus voltage, electrolysis time, the effects of electrolyte concentration on the degradation rate of salicylic acid were explored and the electrochemical oxidation degradation and ultrasound - assisted electrochemical synergetic degradation rate were compared. Results showed that under the same temperature, current density, electrode materials and distance between the anode and the cathode, when nAg∶nCu in the electrodeposition solution was equal to 8∶2, the surface morphology of Ni - based Ag - Cu alloy electrode is good, and the degradation rate of salicylic acid was the highest. The most suitable Na2SO4 electrolyte concentration was 1.064 g/L. Under this condition, the degradation rate of salicylic acid was 98.01%, and the ultrasound - assisted electrochemical oxidation rate was 99.89%, indicating that the degradation rate of salicylic acid under the synergy effect was higher.

The ionic liquid CO(NH2)(2)-NaBr-KBr-CH3NO-ZnCl2 was adopted for electroplating zinc on NdFeB magnet. All the pre-processing of the matrix, the solvents and power supply were authenticated through experiments and the coating was characterized by means of neutral salt spray experiment, SEM and XRD. The results show that when the current density is 1 A/dm(2), the temperature 30 degrees C, the electroplating time 20 min and the additives 10 mL.L-1, a comparatively bright, uniform zinc coating with good corrosion resistance can be obtained by means of digital pulse plating power supply. Therefore it supplies a new idea for electroplating of zinc on NdFeB magnet.

Low temperature ionic liquid NH2CONH2-NaBr-KBr-CH3NO-AlCl3 was prepared and used as a medium for pulse Al electroplating on Cu substrate so as to improve the compactness,uniformity and metallic luster of pulse electroplated Al coating.The morphology and crystal structure of as-plated Al coating were analyzed by scanning electron microscopy and X-ray diffraction,and the effects of current density,time,temperature and power-supplying mode on the performance of as-plated Al coating were investigated.Results showed that the electric conductivity of as-prepared NH2CONH2-NaBr-KBr-CH3NO-AlCl3 ionic liquid rose with increasing temperature,and pulse electroplated Al coating had better performance than direct current electroplated counterpart.Particularly,a bright,compact and uniform Al coating with high crystallinity and purity could be obtained on Cu substrate by pulse electroplating in the ionic liquid medium with a digital pulse plating power supply(ton = 2 ms,toff =8 ms) operating at a current density of 50 mA/cm2,a temperature of 70 ℃ and a duration of 45 min.Besides,metallic Al preferentially grew along(200) plane.