ISSN:
1573-9066
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. The authors show that, in the electrodeposition of copper powder below $$C_{Cl^ - } = 3 \cdot 10^{ - 4} $$ mole/liter, the action of chloride ions consists in their specific adsorption on the cathode. It is postulated that with $$C_{Cl^ - } \geqslant 4 \cdot 10^{ - 4} $$ mole/liter, in addition to an adsorption mechanism, a colloidal-adsorption mechanism may govern the action of Cl− owing to formation of CuClsol ultraparticles in the catholyte. 2. The dendritic character of the Cu powder particles and their surface areas increase with Ccl −, reaching a maximum value at 3·10−4 mole/liter Cl−. With a further increase in the chloride content of the electrolyte, the particles of the cathode deposit acquire an acicular shape. 3. The current yield of the copper powder increases owing to the depolarizing effect of the chloride ions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00774010
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