Abstract
Abstract The rates of Cu(II) cementation on chemically polished strips of beer-can aluminum and on impure aluminum shavings were studied in acidic cupric sulphate solutions. The rate constant for copper cementation on aluminum canning sheet was measured as a function of the temperature, the initial Cu++ concentration and the hydrogen ion concentration. The results are compared with those previously determined for copper cementation on a pure aluminum disc. Chloride ion promotes rapid copper cementation on canning sheet aluminum and it assists in dislodging the copper from the sheet.The practical aspects of copper cementation on aluminum shavings were studied in experiments with a small aerated cone unit. The copper product was coarsely granular. The cementation rate increased linearly with the initial Cu++ concentration. The efficiency of copper cementation on aluminum was determined and compared with that for copper cementation on scrap iron. Resume Les auteurs ont etudie le taux de deposition de Cu (II)...
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