Role of amino acids on electrodeposition and characterisation of zinc from alkaline zincate solutions

Sekar, R.; Jagadesh, K Kesavan; Bapu, G.N.K. Ramesh

doi:10.1179/0020296715z.000000000239

Cited by 7 publications

(1 citation statement)

References 14 publications

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“…While increasing the leveller concentration decreased the throwing power on average over the range studied, this effect was not statistically significant at α = 0.05. Throwing power has been found to depend on plating parameters, such as zinc concentration, pH, current density, temperature, and plating duration [35][36][37]; and other studies have shown that additives can improve throwing power in zincate baths [38]. However, over concentration ranges examined for these specific additives, no correlation was made between throwing power and additive concentrations or interactions.…”

Section: Throwing Power and Cathodic Current Efficiencymentioning

confidence: 99%

Effects of Carrier, Leveller, and Booster Concentrations on Zinc Plating from Alkaline Zincate Baths

Mohammed

Moats

2022

Metals

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Organic additives are required for alkaline zincate plating baths to obtain an acceptable coating on steel for corrosion protection. The effects and possible interactions of three commercial additives (Eldiem Carrier, Eldiem Booster, and Bright Enhancer 2× on zinc electrodeposition from a high-concentration alkaline zincate bath were investigated. Visually acceptable deposits were produced within the current density range of 130 to 430 A m−2 for most additive conditions examined. Over concentration ranges examined, decreasing the booster concentration led to brighter zinc deposits, and an interaction between the carrier and the booster was detected. The additives fostered the formation of compact and adherent coatings as illustrated by scanning electron microscopy. Throwing power and current efficiency were not impacted by the additives over the concentration ranges examined. Linear sweep voltammetry proved that the additives increased the overpotential for zinc deposition. The additive combination that produced the brightest deposit also demonstrated the strongest adsorption of additives in linear sweep voltammetry.

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