COMPOSITE COATINGS WITH NICKEL MATRIX AND SILICON BY CLEAN TECHNOLOGY

11th International Multidisciplinary Scientific GeoConference SGEM2011, www.sgem.org, SGEM2011 Conference Proceedings/ ISSN 1314-2704, June 20-25, 2011, Vol. 3, 27-34 pp

ABSTRACT

On global scale the nickel coatings obtaining is realised with electrolytes that have the
toxically composition that working at the temperature range 40 - 80 oC. In this paper was
proposed an ecological solution to obtaining the nickel layers and composite coatings
with nickel matrix and silicon. The energy consume is reduced because the working is
passed on ambient temperature. The addition of silicon particles into nickel plating bath
leads to significantly changes for the surface morphology and for the roughness of the
composite coatings deposited on steel substrates. The addition of silicon particles in 20
g/L concentration was studied. The changes generated by the silicon addition into nickel
baths on the morphology of the composite coatings and also on their roughness were
analysed. The variation of roughness with plating parameters (current density, rotation
speed, time of the process) is presented.

Keywords: clean technology, composite, nickel matrix, silicon particles