Study On The Failure Process Of Electrolyte In Zirconium Salt System

In this paper the AZ91 D magnesium alloy was treated by micro arc oxidation technology in zirconium salt solution system. The decay law of electrolyte and the influence on the performance of samples was studied. A certain methods was attempted at the end of the experiment of solution regeneration failure. The machine bility of regeneration of electrolyte and electrolyte through the microstructure were compared and analyzed, discuss the regeneration mechanism and future possibilities for the future development. The mechanism and regeneration of failure electrolyte was also discussed. The pH, conductivity, temperature variation of electrolyte was analyzed in the failure process, the impact of specimens’ properties contain corrosion resistance, density, phase composition and morphology were observed and analyzed. Experiments show that: the failure process caused the pH value increased, the conductivity raised, temperature decreased; the corrosion resistance first decreased and then increased, the density increased first and then decreased, while the film appeared micro morphology corrosion, phase composition almost has no change. Try to revive the disabled solution by filtering or additive. It is found that the filtration method has some effect on the aging electrolyte, but can not improve the failure electrolyte effectively. By adding modifiers, the electrolyte can be improved, and there is still a gap between the processed sample and the original electrolyte, and it needs to be further studied.When the micro arc oxidation was started, the component will change(the main reason is impurities which form the matrix composition of the sample in the reaction process), with the process the electrolyte will become unstable, the phenomenon of the solution became turbid, then flocculent precipitate appeared at the bottom, the arc voltage increased, arc become larger, the surface become rough and even the whole, the more use of electrolyte(a large number of sample) the phenomenon is more obvious.This changed the nature of the electrolyte, but also have a significant impact on the performance of samples, and this phenomenon can not be avoided. In this experiment, the electrical parameters was fixed in a certain amount of electrolyte, when the arc failure or surface defect determine the failure of electrolyte.