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Microhardness and roughness in nickel electrodeposition under pulse reversed current conditions
This item is provided by the institution :
National Technical University of Athens
Repository :
Digital Library of National Technical University of Athens | Dspace@NTUA
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ΕΚΤ item type
Journal part
(EN)
Scientific article
(EN)
EKT year
1993
(EN)
EKT historical period
Title
Microhardness and roughness in nickel electrodeposition under pulse reversed current conditions (EN)
Creator
Spyrellis, N (EN)
Kollia, C (EN)
Description
The pulse reversed current (PRC) technique perturbs the electrocrystallization process and as a results changes the surface morphology and the properties of the deposits. The effect of this technique on the electrocrystallization mechanism depends, in addition to the other electrolysis conditions, on two new parameters: the pulse frequency v and the duty cycle [T/(T+T')] × 100, where T is the deposition time (cathodic period) and T' the dissolution time (anodic period). The purpose of this work was to study the changes in the microhardness and the roughness in correlation with the textural modifications, occuring of nickel deposits prepared from an organic-free Watts-type bath, as a function of the PRC parameters. The microhardness of the deposits was determined by the Vickers method and the roughness by the Ra value. It was found that the PRC technique affects the composition of the catholyte with a mechanism analogous to the action of organic additives, by reinforcing the selective adsorption phenomena of the crystal growth, and permits the preparation of smooth and hard nickel electrodeposits in the absence of organic additives. © 1993. (EN)
Type
journalArticle (EN)
Subject
Pulse reversed current technique (EN)
Surface morphology (EN)
Vickers method (EN)
Electrocrystallization (EN)
Hardness (EN)
Roughness measurement (EN)
Microhardness (EN)
Catholyte (EN)
Physics, Applied (EN)
Textures (EN)
Electrolysis (EN)
Materials Science, Coatings & Films (EN)
Watts type bath (EN)
Nickel deposits (EN)
Surface properties (EN)
Electrodeposition (EN)
Provider
National Technical University of Athens
Repository / collection
Digital Library of National Technical University of Athens | Dspace@NTUA
Subcollections
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
Ιδρυματικό Αποθετήριο
Δημοσιεύσεις μελών Δ.Ε.Π. σε περιοδικά
Journal
Surface and Coatings Technology (EN)
Language
English
Issued
1993 (EN)
Identifier
http://hdl.handle.net/123456789/10997
2 (EN)
101 (EN)
58 (EN)
ISI:A1993LR33800003 (EN)
105 (EN)
0257-8972 (EN)
Publisher
ELSEVIER SCIENCE SA LAUSANNE (EN)
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