Influence of Wetting Additives on the Quality of Nickel Coating
Keywords:
Electrolyte, Active Substance, Composition, Surface Tension, Coating.Abstract
The paper presents the results of testing the influence of different types of wetting additives on the quality of Ni coating. Three types of additives from three different suppliers were tested under the same conditions at different concentrations. Selected concentrations were: twice lower concentration than lower recommended (C1), lower recommended concentration (C2), upper recommended concentration (C3), twice higher concentration compared to lower recommended (C4), twice higher concentration compared to upper recommended (C5). The surface tension values of the solution were compared and the corrosion resistance in the salt chamber was examined. In addition, what is important in the production itself is the visual appearance of the coating, the comparison of which is also shown in the paper. The obtained results show differences in surface tension, as well as in the visual appearance of the coating. The additive based on C12 - C14 alkyl ether sulfate with essential oils proved to be the most effective in reducing the surface tension of the solution, which results in a much better coating quality as well as aesthetic appearance. The summary results show that the concentration, type and composition of the wetting additive significantly affect the quality of the shiny nickel coating.
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