Mechanical Engineering Technologies and Applications

Volume: 1

Electrochemical Studies and Characterization of Zn-Mn Coatings deposited in the presence of Novel Organic Additives

Author(s): Nouha Loukil* and Mongi Feki

Pp: 101-117 (17)

DOI: 10.2174/9789814998185121010010

* (Excluding Mailing and Handling)


A novel additive based on alkylphenol ethoxylate sulphite was investigated in Zn-Mn electrodeposition on steel from a chloride bath. Electrochemical study via cyclic voltammetry showed that the tested additive increases the over-potential of the Zn deposition, resulting from strong adsorption of molecules additives on the cathode surface. Thus, Mn-rich alloy containing 16.3% of Mn is successfully co-deposited. The morphology and crystallographic structure of Zn-Mn co-deposits were analyzed using Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD), respectively. SEM micrographs showed that Zn-16.3% Mn alloy obtained in the presence of the tested additive displays hexagonal pyramid morphology. XRD analysis exhibited that Zn-16.3% Mn alloy is monophasic with hexagonal close-packed ε-Zn-Mn phase.

Keywords: Additive, Electrodeposition, Morphology, Structure, Zn-Mn alloy.

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