Abstract

HOYOS, B. A.; OSSA, L. A.  and  RENDON, M. C.. Rectangular wave current effect on plated nickel hardness. Lat. Am. appl. res. [online]. 2008, vol.38, n.1, pp.73-78. ISSN 0327-0793.

Effects of frequency, average current density and duty cycle on hardness of electroplated nickel were studied in Watts and sulphamate solutions by mean of direct and rectangular pulse current. The results in Watts solutions show high hardness values at low duty cycles, high average current density and high frequency of the pulse current. Hardness in nickel sulphamate solutions shows a low variation with duty cycle and frequency changes. Hardness values obtained in the Watts bath with rectangular pulse current are higher than those achieved with direct current at the same average current density. In the sulphamate bath this difference has not significance.

Keywords : Pulse Current; Hardness; Electroplating; Nickel.

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