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Influence of polyethoxylated additives on zinc electrodeposition from acidic solutions

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Abstract

The influence of several ethoxylated additives (ethyleneglycol and polyethyleneglycol polymers of different molecular weights) on the nucleation, growth mechanism and morphology of zinc electrodeposited from an acidic chloride bath is reported. The electrochemical study was carried out using cyclic voltammetry, inversion potential and chronoamperometric techniques. The dimensionless graphs model was applied to analyse the nucleation process and the results showed that the studied additives have a blocking effect on the electrodeposition of zinc. This effect occurs in the first stages of the nucleation process and is dependent on the molecular weight of the additive. Changes induced by the presence of additives in the morphology and grain size of the deposits were observed using SEM analysis. Results show that the presence of additives modifies the nucleation process and determines the final properties of the deposits.

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  1. Parque Tecnológico Querétaro – Sanfandila, Centro de Investigación y Desarrollo Tecnológico en Electroquímica (CIDETEQ), Apartado Postal 064, Pedro Escobedo, Querétaro, Mexico, CP 76700

    G. Trejo, H. Ruiz, R. Ortega Borges & Y. Meas

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  1. G. Trejo
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  2. H. Ruiz
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  3. R. Ortega Borges
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  4. Y. Meas
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Trejo, G., Ruiz, H., Borges, R.O. et al. Influence of polyethoxylated additives on zinc electrodeposition from acidic solutions. Journal of Applied Electrochemistry 31, 685–692 (2001). https://doi.org/10.1023/A:1017580025961

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