The influence of zinc concentration, pH and flow velocity on the electrodeposition of Zn-Fe alloy under the high electrolyte flow

The electrodeposition behavior of Zn-Fe alloy has been investigated by the partial polarization curves for alloy electrodeposition. The deposition of Fe was revealed to be suppressed under conditions such as a high concentration of Zn ions or a high electrolyte flow. Froth of the conditions accelerate Zn electrodeposition. These results can be explained by the hydroxide (of Zn) suppression mechanism. In the case of solution pH, the change of pH to a lower value proved to suppress the deposition of both metals. This indicates the suppression of Fe is possible without an acceleration of Zn deposition. In addition to this, the suppression of Fe deposition under conditions with high electrolyte flow or lower pH was also observed in Fe single deposition. From these results, in addition to the hydroxide suppression mechanism, the mechanism of Fe single deposition was also proven to affect the deposition behavior of Fe when in a Zn-Fe alloy.