Controlling ph in electro deposition of particles from solution

Details Controlling ph in electro deposition of particles from solution Controlling ph in electro deposition of particles from solution

C - Chemistry, Metallurgy

25

B

204/52.5

C25B 15/02 (2006.01) C25C 7/06 (2006.01)

Patent

CA 1214427

PRECIPITATION OR DEPOSITING OF PARTICLES FROM A SOLUTION Abstract The precipitation or depositing of particles from a solution in a cell in which an electric field is applied between an anode and a cathode typically an electrolysis cell for the co-precipitation of mixed oxides but also cells for electrodeposition or the electrophoretic deposition of colloidal particles, is controlled by measuring the pH of the solution in the cell using a probe shielded in a tube from the migrating electric current and from gas bubbles. The pH of the solution is then adjusted to a selected value as a function of the measured pH, e.g. by varying the electrolysis current or by bubbling in acid vapour, air or base vapour.

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