THE EFFECT OF TIME ON THE SELECTIVE DISSOLUTION OF BINARY EUTECTIC ALLOYS

Curves ''current vs. time'' of dissolution of the less noble component in hypoeutectic and eutectic alloys were analyzed taking into account the change of the controlling step with time. Equations for calculati on of the transition time were derived. Non-uniform two-parameter func tions are given to describe the kinetic parameters of reactions as fun ctions of the potential and content of the less noble component. The r elationships were confirmed by an example of dissolution in cadmium-bi smuth alloys in chloride containing media.