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High rate transpassive dissolution of nickel with pulsating current

✍ Scribed by M. Datta; D. Landolt

Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
570 KB
Volume
27
Category
Article
ISSN
0013-4686

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✦ Synopsis

The influence of pulsating current on high rate transpassive dissolution of nickel in 6 M NaNO, has been investigated. Obtained results indicate that current etEciency for nickel dissolution is influenced by pulse time and to a certain extent by relaxation time and is related to the anion build up at the anode. Dissolution efficiency for a given average current density is higher under pulsating current than direct current conditions. The influan~ of different pulse parameters on the anode potential and on the onset of sparking are investigated. The use of a pulsating current provides additional possibilities to influence the transpassive dissolution behavior in electrochemical machining and surface finishing operations.

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