Journal
SURFACE ENGINEERING AND APPLIED ELECTROCHEMISTRY
Volume 46, Issue 3, Pages 206-214Publisher
ALLERTON PRESS INC
DOI: 10.3103/S1068375510030026
Keywords
-
Categories
Funding
- Moldova Republic
- Moldavian National Project for Young Research Workers [09.819.05]
Ask authors/readers for more resources
Using a Hull cell with a rotating cylindrical electrode (RCE), the effect of the hydrodynamic conditions on the deposition rate and its micro- and macrodistribution and the composition and microhardness of the cobalt-tungsten coatings deposited from a citrate electrolyte containing cobalt sulphate (0.2 mol/l) and sodium tungstate (0.2 mol/l) at pH - 6.7 and the solution temperature of 60 degrees C in the Re numbers range of 0 - 3000 is examined. It is shown that the hydrodynamic deposition conditions have no effect whatsoever on the surface roughness, but they slightly influence the electrolyte's throwing power. The correlation between the intensity of the hydrodynamic flows, the deposition rate (due to the current efficiency's increase), and the composition of the coatings (along with their distribution over the surface) is established. It is shown that certain modes of the process at a high deposition rate make it possible to reach a high uniformity of the coating's composition with a high tungsten content, which results in obtaining the maximum surface microhardness.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available