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The effect of saccharin addition and bath temperature on the grain size of nanocrystalline nickel coatings

โœ Scribed by A.M. Rashidi; A. Amadeh

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
572 KB
Volume
204
Category
Article
ISSN
0257-8972

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โœฆ Synopsis

Nanocrystalline nickel coating was synthesized by direct current electrodeposition from a Watts bath at the current density of 100 mA/cm 2 and pH = 4. The effect of saccharin addition (0-10 g/l) and bath temperature (45-65 ยฐC) on the average grain size of the deposits was investigated by XRD technique. The results showed that the average grain size decreased from 426 nm to 25 nm as the saccharin concentration increased from 0 to 3 g/l, while further increase in saccharin concentration had no significant effect. Theoretical model also indicated a non-linear function for dependence of grain size on saccharin concentration, which was in accordance with experimental results. The experimental results showed that the increases in the bath temperature had no considerable effect on the average grain size of the deposits. A theoretical formula was also established for the temperature dependence of the grain size.

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