Abstract
A short-term exposure of zinc (Zn) electrodes in polyethylene glycol (PEG) containing alkaline electrolytes at a temperature range of 45–65 °C significantly reduces the corrosion rate of the Zn in the strong alkaline solutions. The enhanced characteristics of the protective film formed during this pretreatment process is attributed to a substantial reduction in the cross-sectional “diameter” of the hydrated inhibitor molecules, due to a decrease in the hydration number at warmer temperatures. One can expect that “slimmer” organic molecules with a lower cross-sectional dimension, having a lower hydration number, will constitute a denser surface layer, providing enhanced isolation of the neighborhood active sites at the Zn anode. Implementing this approach in alkaline batteries utilizing Zn anodes may result in battery performance enhancement.
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