NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.14 [2007] >
IJCT Vol.14(3) [May 2007] >

Title: Electrodeposition and compositional behaviour of Zn-Ni alloy
Authors: Thangaraj, V
Hegde, A Chitharanjan
Keywords: Zn-Ni alloy
Chloride bath
Issue Date: May-2007
Publisher: CSIR
IPC CodeC25D3/56
Abstract: This paper discusses the optimization of an electroplating bath for smooth and uniform deposition of zinc-nickel alloy on mild steel. Electroplating has been carried out in a chloride bath using glycine and gelatin as additives. The effect of bath conditions and operating parameters on chemical composition, micro-hardness and appearance of the deposit have been studied and discussed. The experimental results reveal that a bright Zn-Ni alloy having about 13.6 %Ni is showing good performance against corrosion. The corrosion resistance of the deposit is found to be characteristic of its %Ni content, and is improved drastically after chrome passivation. The bath follows anomalous codeposition with preferential deposition of Zn over the entire current density range used for the study. The increase of %Ni in the deposit with current density is due to the depletion of more readily depositable Zn²⁺ ions at the cathode. No transition current density, at which the codeposition behaviour changed from the anomalous to normal type, was observed during the study. The increase of %Ni in the deposit at high current density (c.d.) is attributed to high ratio of Ni²⁺/Zn²⁺ in the bath. The effect of temperature on the plating process showed that codeposition of metals on the cathode is diffusion controlled.
Page(s): 246-252
ISSN: 0971–457X
Source:IJCT Vol.14(3) [May 2007]

Files in This Item:

File Description SizeFormat
IJCT 14(3) (2007) 246-252.pdf444.29 kBAdobe PDFView/Open
 Current Page Visits: 143 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 162866 since 01-Sep-2015  Last updated on 21-Jun-2016Webmaster: