Chromium Electroplating from Sulfate
Oxalate Solutions Containing Nanoparticles of Alumina and Silicon Carbide
E. N. Lubnin, N. A. Polyakov, and Yu. M. Polukarov
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy
of Sciences, Leninskii pr. 31, Moscow, 119991 Russia
Received January 27, 2006
Abstract — The effect of the introduction of Al2O3 and SiC particles into the base chrome-plating sulfateoxalate Cr (III) bath on the electrochemical characteristics of chromium deposition, as well as the structure and mechanical properties of deposits, is studied. It is shown that Al2O3 particles are incorporated only into the surface film and are not detected in the bulk of the coating. Particles SiC are incorporated into both the surface film and the deposit. Introducing the particles into the bath makes the cathode polarization at a fixed current density, as well as the current efficiency and the bath throwing power, increase.
PACS numbers: 81.15.Pq, 82.30.
6, 82.45.Qr