Abstract
SHS investigation development is considered from the geographical and historical viewpoint. 3 stages are described. Within Stage 1 the work was carried out in the Department of the Institute of Chemical Physics in Chernogolovka where the scientific discovery had been made. At Stage 2 the interest to SHS arose in different cities and towns of the former USSR. Within Stage 3 SHS entered the international scene. Now SHS processes and products are being studied in more than 50 countries.
Abstract
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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Authors:Bentham Science Books