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In this paper, the main factors influencing the morphology of solid metal obtained at the cathode of an electrolytic cell are discussed. Although the presentation is rather fundamental, important practical conclusions are derived. Specific topics linked to electrogalvanizing are stressed.
Electrolysis of a 22 wt % NaOH solution has been carried out in a vertical tall rectangular cell with two segmented electrodes. The ohmic resistance of the solution between a segment pair has been determined as a function of a number of parameters, such as, current density and volumetric rate of...
The cell performance and polarization distribution in the horizontal plane of a phosphoric acid fuel cell (PAFC) were studied for thirteen different types of gas flow. In all cases, the potentials of the anode and cathode in the fuel outlet area shifted to positive directions. At 90% utilization...
An electrochemical concentrator for application to the chlorine-caustic industry is currently under development. In it 30 to 35 wt % NaOH enters the anolyte and catholyte chambers and exits at 20 and 50 wt %, respectively. Consequently, in support of the electrochemical concentrator development,...
A dynamic model of the porous sulphur electrode including diffusion of the reactant is developed to simulate charge-discharge characteristics of the sodium-sulphur cell and transient behaviour of the cell after termination of operation. From the results of investigations the following are...
A simple method is proposed for the estimation of the current bypass from experimental current-potential (i-U) curves measured for a “bipolar reactor” and with a one-element cell of similar geometry. The model is valid only in the region where a lineari-U relation is obtained.
The leaching rates of gold, silver, palladium and platinum in cyanide solutions have been determined from the corrosion potential and voltammograms of the anodic oxidation reaction. The order of reactivity was Au>Ag>Pd>Pt and the leaching rate was a maximum at about pH 10 for each metal. An...
The cyclic voltammetric behaviour of reinforcing steel in cured Portland cement paste was investigated and compared with that of pure iron. The cyclic volammetric behaviour of reinforcing steel in cement is very similar to that reported earlier for iron in cement, both with and without NaCl and...
Films of polycrystallinen-CdSe were prepared onto titanium substrates by electrodeposition from an aqueous bath. The materials were studied as photoelectrodes in a photoelectrochemical cell, using Fe(CN)
as redox couple. The CdSe electrode deteriorated within less than one hour due to...
The voltammetric behaviour of nickel in acid solutions is considerably modified by the presence of CO. As in plain acid the voltammogram also exhibits two main anodic peaks, but in this case, the adsorption of CO on the nickel surface shifts the metal electrodissolution to more positive...
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