ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Electrode process of deposition and dissolution of the Al-Pb binary-system in an organic electrolyte. 2. Stability of the aluminum and aluminium-lead metallic coating in ethylbenzene electrolyte

L. Lux and M. Gálová

Department of Chemistry, Faculty of Metallurgy, Technical University, CS-043 85 Košice

Abstract: The stability of Al and Al—Pb coating obtained from ethylbenzene electrolyte was studied in this electrolyte. The study was carried out by comparison of chronopotentiometrically obtained cathodic and anodic charge densities. It was observed that in electrolyte with lower AlBr3 concentration around 1 mol dm^-3 both Al and Al—Pb coatings underwent spontaneous chemical dissolution. At AlBr₃ concentration approx. 2 mol dm^-3 this effect was minimalized. At long enough electrolysis time the anodic to cathodic charge density ratio approached one. The conditions were found leading to the depression of the spontaneous dissolution of the coating. Reactions explaining this effect were suggested.

Full paper in Portable Document Format: 423a291.pdf

Chemical Papers 42 (3) 291–298 (1988)