The conditions of electrophoretic deposition of aluminum powder were investigated by studying the effects of shape and size of powder and concentrations of electrolytes, tannic acid, and water in the suspension. Aluminum powder was deposited on cathode at field strength of 25-130V/30mm from the suspension in ethanol bath with the addition of tri-, bi-, and uni-valent electrolytes such as AlCl
3, MgCl
2, and HCl, which were easily soluble in alcohol.
The best deposition was seen when the concentration of electrolyte was 1m mol/
l. When the concentration was lower, the deposition was localized, and when it was higher, the deposition velocity was decreased and the surface of deposits was uneven.
In pure methanol bath, the deposition velocity was higher as compared with in ethanol, but the surface of deposits was very rough.
In the mixed bath of methanol and ethanol at the ratio of 2:3, the deposition was more rapid and more smooth surface was obtained.
抄録全体を表示