Electrodeposition of Alloys; Application of the Markov Chain Model to Intermetallic Compounds

Abstract

Abstract Recently a Markov chain model has been proposed to predict the composition of alloys as a function of the electrolyte composition. The essential parameters of this model are selectivity constants, describing the selectivity of the growth centers, the kink site positions, for the ions of the metal components in the electrolyte. In this paper application of the simple model to deposition of intermetallic compounds will be discussed. The Markov chain model can be successfully applied to the formation of the intermetallic compound NiSn. Whereas the model can describe well the deposition of Ni rich Zn-Ni alloys at low current densities, it fails at high current densities with anomalous alloy composition.