Effect of Gluconic Acid Ca-P Electrolyte System on the Surface Morphology of Ceramic Film

The biological ceramic film on Ti was prepared in the Ca/P electrolyte system of gluconic acid by micro-arc oxidation.The effect of the electrolyte components on surface morphology,pores ratio,pores density and pores size was studied.The surface morphology was analyzed by scanning electron microscopy(SEM)and the graphics processing software(ImageJx).The results show that the NaOH concentration has the most significant impact,and the range of porosity ratio is 17%.At lower concentration,the surface is once sintering pores structure;at higher concentration,the surface is sintering and film structure.The change of Ca/P element concentration can improve the conductivity,and the porosity is 20%-33.3%.The surface is craterlike structure with an appropriate concentration.The effect of gluconic acid on ceramic film surface is minimal,the porosity is more than 30%,and most of the surface is twice sintering pores structure.The performance of the ceramic film in the gluconic acid system is similar to common complex agent.The gluconic acid system has practical and alternative meaning.