Effect of Voltage and Current Density on the Coating Performance of Micro Arc Oxidation on Pure Titanium Metal

摘要

The maximum thickness of the pure titanium metal coating by micro arc oxidation increases when eurrent density increases, hut the color isn't even when the current density is too big. Thickness of the coaling increase when voltage increases,but the color isn't even when the voltage is too bin. The beuer technical parameters are Na_2SiO_3 100g/L, voltage 350V, current density 100A/dm~2 oxidation lime 150 s, the thickness of the coating is 12 μm, the color is light-grey and even. The diameter of the holes of the coaling increase when voltage or current density increases. The coatinu mainlv contains O. Si and Ti elements. The coating's micro hardness is 1000 HV.