A mass transfer study of the electropolishing of metals in mechanically agitated vessels

Authors
Sedahmed, GH Abdo, MS Kamal, MA Fadaly, OA Osman, HM
Citation
Gh. Sedahmed et al., A mass transfer study of the electropolishing of metals in mechanically agitated vessels, INT COMM HE, 28(2), 2001, pp. 257-265
Citations number
14
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
ISSN journal
07351933 → ACNP
Volume
28
Issue
2
Year of publication
2001
Pages
257 - 265
Database
ISI
SICI code
0735-1933(200102)28:2<257:AMTSOT>2.0.ZU;2-L
Abstract
Rates of electropolishing of vertical copper plates in H3PO4 were studied i n a rectangular cell stirred by 4 blade 45 degrees pitched turbine. Variabl es studied were impeller rotating speed, plate height and H3PO4 concentrati on. The limiting current density at which polishing takes place was found t o increase with impeller rotation speed to the power of 0.44, increasing th e plate height (L) was found to decrease the limiting current density(I) ac cording to the equation: I = a L-0.24 . The data were correlated under diff erent conditions by the dimensionless equation Sh = 2.5 Sc-0.33 Re-0.44 (L/ d(e))(-0.24). (C) 2001 Elsevier Science Ltd.