摘要：

Lignin sulphonate and an extract of horse chestnut are added to a lead fluorosilicate electrolyte in order to improve the levelling of cathodic lead electrodeposits. By inducing a strong overpotential, these additives suppress totally the various forms of dendritic growth. The resulting smooth layers present weak fibre textures with characteristic morphologies. An original and simple method based on X-ray diffraction was developed in order to evaluate the texture quality. These levellers have different dependence on potential and rotation rate of the disk electrode. In particular, electrolyte agitation tends to increase the inhibition efficiency for one compound and to decrease it for the other. The conjoint use of the two additives ensures a good levelling, even for very thick lead electrodeposits.

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