pH distribution around the electrode during electrochemical deposition process for producing bioactive apatite

The pH distribution of an electrolyte around a cathode during the electroch emical deposition of calcium phosphate was examined using a pH imaging micr oscope and discussed from an electrochemical point of view From the plot of the weight gain due to the deposits against square root of the loading tim e, the critical time for deposition was determined at four levels of curren t densities. OH- concentration around the cathode during the electrochemica l deposition was found to bt pH 9.6 using the Sand equation on the basis of the critical time and other constants. The pH distribution around the cath ode was quits different for the electrolytes with and without PH buffer.