| Description |
ix, 65 leaves : illustrations ; 29 cm |
| Summary |
"Cathode polarization curves were obtained for the electrodeposition of zinc from sulfate solutions with pH 2 and zinc concentrations of 10.0, 40.0, 80.0, and 100.0 gpl zinc. Both pure zinc and pure aluminum were used as cathodes with some difference in results noted. The effect of animal glue additions of 0.01, 0.10, and 0.50 gpl of solution on the cathodic polarization curves and the resulting deposit morphologies were determined. These glue additions correspond to 0.20, 2.0, and 10.0 pounds of glue per ton of zinc deposited, respectively. The slope of the Tafel region of the polarization curves was found to be 0.045v and the second electron transfer the corresponding mechanism for zinc electrodeposition. The slope of the diffusion controlled region was found to vary between 0.15-0.20v depending primarily on the zinc ion concentration. Increasing slopes were obtained with decreasing zinc concentration. The effects of the various process conditions on the orientations and morphologies of the zinc deposits were also determined. The electrocrystallization process with and without glue additions is discussed"--Abstract, leaf iii. |
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