Measurement of the Hydrogen Ion Concentration in the Vicinity of the Anode during Electrodeposition of Water-Soluble Resin

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Abstract
In order to make clear the mechanism of the electrodeposition of water-soluble resin, the hydrogen ion concentration in the vicinity of the anode during electrodeposition was measured using a quinhydrone reaction on platinum wire. The measured concentration of hydrogen ions in the vicinity of the anode was then compared with that of hydrogen ions which had been calculated according to the diffusion theory. The results show that the most of the hydrogen ions produced at the anode during electodeposition are consumed in the vicinity of the anode. This shows that there is apparently ionic combination of hydrogen ions with organic anions on the anode; this may lead to the deposition of organic anions.

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