• Please log in or register to access this feature.

Article

You have free access to this content

Effect of diethanolamine and triethanolamine on the properties of electroplated Zn–Ni alloy coatings from acid bath

  1. Olfa Hammami1,2,*,
  2. Leila Dhouibi1,
  3. Patrice Berçot2,
  4. El Mustafa Rezrazi2,
  5. Ezzeddine Triki1

Article first published online: 5 MAR 2012

DOI: 10.1002/cjce.21627

Issue

The Canadian Journal of Chemical Engineering

The Canadian Journal of Chemical Engineering

Volume 91, Issue 1, pages 19–26, January 2013

Additional Information

How to Cite

Hammami, O., Dhouibi, L., Berçot, P., Rezrazi, E. M. and Triki, E. (2013), Effect of diethanolamine and triethanolamine on the properties of electroplated Zn–Ni alloy coatings from acid bath. Can. J. Chem. Eng., 91: 19–26. doi: 10.1002/cjce.21627

Author Information

  1. 1

    Unit of Research “COPROMET” ENIT, BP 37, Belvedere, University Tunis-El Manar, Tunis 1002, Tunisia

  2. 2

    Institut UTINAM, CNRS UMR 6213, Équipe Sonochimie et Réactivité des Surfaces, Université de Franche-Comté, 16 Route de Gray, 25030 Besançon Cedex, France

*Unit of Research “COPROMET” ENIT, BP 37, Belvedere, University Tunis-El Manar, Tunis 1002, Tunisia.

Publication History

  1. Issue published online: 6 DEC 2012
  2. Article first published online: 5 MAR 2012
  3. Manuscript Accepted: 18 AUG 2011
  4. Manuscript Revised: 10 AUG 2011
  5. Manuscript Received: 19 MAY 2011

SEARCH

SEARCH BY CITATION

ARTICLE TOOLS

View Full Article (HTML) Get PDF (1440K)

Keywords:

  • Zn–Ni alloy;
  • electrodeposition;
  • ethanolamines;
  • deposit morphology;
  • phase structures

Abstract

In the present work, zinc–nickel alloy coatings have been produced under direct current conditions from an acid bath with different concentrations of diethanolamine (DEA) and triethanolamine (TEA). The produced coatings were analysed through chronopotentiometry, microhardness, X-ray diffraction and MEB techniques. The compositional analysis of the films showed that the Zn–Ni electrodeposition is anomalous for all the systems. Ethanolamines augmented the anomalous behaviour. The hindering in the Ni (II) reduction will be more effective due to complexation of Ni (II) catalyst with ethanolamines. Electrochemical and structure analysis of deposits indicated the presence of γ and highly Zn-enriched phases. The presence of these additives resulted also in coatings with finer grains. The behaviour of modified Zn–Ni alloy coatings in corrosion solution of 3% NaCl was investigated through potentiodynamic polarisation and electrochemical impedance spectroscopy. It was found that the obtained Zn–Ni/3 mM TEA alloy exhibited better corrosion resistance compared to pure Zn–Ni alloy electrodeposited at similar conditions. © 2012 Canadian Society for Chemical Engineering

View Full Article (HTML) Get PDF (1440K)