Research On Role Of Electrolyte In Electrolyte- Plasma Processing Technology

Electrolyte - Plasma processing technology, by means of plasma chemistry reaction and electrochemistry reaction, is a specific technology applied in the treatment of metal surfaces to improve the finishing quality of the metal for polishing. It is especially applied for polishing parts with complex shapes, making it difficult to mechanical polishing. Additionally and more importantly, Electrolyte - Plasma processing technology is environment-friendly. It has far more advantages than other polishing methods. This thesis, based on systematic tests, analyzes the performance of the Electrolyte - Plasma processing technology under different electrolytes parameters.This thesis studies the Electrolyte - Plasma processing techniques by analysis of the performance of processed materials, utilizing stainless steel as the subject of analysis. The orthogonal experiment is respectively conducted on parameters of the electrolyte temperature, concentration and flow rate, with the value of surface roughness as the index. Then based on the method of range analysis , the order of the affecting degree of the three parameters on the processing effect is confirmed and the optimal parameters combination is determined. Taking economic effects into consideration, another orthogonal experiment, using the value of removal rate as the index, are respectively conducted on all three parameters either to confirm the results of the first orthogonal experiments. Then a significant level analysis of the three parameters is made by means of Analysis of Variance. Tests on the three parameter's affecting on the result of the polishing process are respectively conducted, with the value of removal rate, surface roughness and corrosion resistance as the indexes. Through this series of tests, the most reasonable value of each parameter is determined by comparing respective processing performance. In this way, each parameter's optimization is finally accomplished.A comparison on metal's surface performance before and after applying the optimum proposal shows: the material surface micro-topography is greatly improved; The surface roughness value (Ra) is reduced from 0.133μm to 0.064μm; The corrosion resistance is greatly improved according to a measurement test of Corrosion Electrochemistry and a Polarization curve test indicates that corrosion potential moved positively from -0.276V to -0.224V; The surface smoothness degree is increased from 2 to 5 and the processed material ends up with a surface with a mirror luster; The surface hardness value (HV) declines from 199.30 to 189.24. All these comparative analysis from various aspects of performances verify the reasonableness of the electrolyte parameter optimization.