Fused-salt electroplating

Fused-salt electroplating, which is commonly referred to as metal-liding, is a process for surface modification and surface hardening by electrodeposition fiom fused-salt electrolytes. Two unique aspects of this electrodeposition process are (1) elements that cannot be plated by conventional processes may plate by fused-salt electrodeposition and (2) if the deposition rate is controlled to match the diffusion rate of the 

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Electroplating. When ionicaHy bonded molecules are dissolved in a solvent, some of the molecules dissociate into ions, whether the solvent is water, organic solvent, or a fused salt. A simple example is that of sulfuric acid or copper sulfate in water, giving... 

Electrorefining in aqueous solution is used for purifying metals and for electroplating, for example, for corrosion protection by zinc coating of steel. Electrorefining of metals is only possible for those metals with a positive standard potential (Ag, Au, Cu, Table 6.19.1) or if H2 formation at the cathode (which competes with deposition of the metal) is hindered by a high overpotential (Zn, Ni). For electrochemically very non-noble metals such as aluminum with a very negative standard potential, fused salt electrolysis is needed (Section 6.19.4.2). 

Pulse plating of zinc, cadmium, nickel, chromium and precious metals in aqueous media and molybdenum, chromium, tungsten, niobium and titanium in fused salts improves the properties of the deposits [1,15]. Dense, not dendritic coatings can be obtained because concentration polarization is minimized by the use of pulse current (PC) [16]. Moreover, other pulse plating effect can improve the surface roughness and morphology of the electroplated coatings [17, 18],... 

Non-aqueous electrolyte (electroplating) An electrolyte formed by having a non-aqueous liquid solvent such as a fused salt or alcohol. 

Electroplated coatings (Section 12.1) Aluminium can be electroplated from molten salts or organic solvents. It can be plated on to other metals from fused aluminium chloride melts, e.g. 75[Pg.467]

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