**1.2.2.8 Effect of electrolytes' PH values and NO3 concentration on cathodicelectrodeposition**

With the SZX-STAD2 type of OLYMPUS metallurgical microscope, observation of the Ti-O films obtained by cathodic-electrodeposition for 4min in the electrolytes of PH0.71 and PH1.2 respectively, and the electrolyte without NO-3 added in and electrolyte with 0.02M and 0.2M of NO-3 adding in respectively, were carried out, in order to investigate the effect of PH value and NO-3 concentration on cathodic-electrodeposition.
