Abstract
The coupled mathematical model of electrocodeposition process on the rotating cylinder electrode is presented. Low Reynolds k-e model with Abe-Kondoh-Nagano damping functions is used to describe mass transport of electrolyte. The cathodic and anodic processes are described by the tertiary current distribution theory. Mass transfer of electrolyte ions is described by diffusion-convection equation and is studied throughout the volume of the electrolyte cell. The simulation of electrocodeposition of Cu-Al2O3 nanoparticles on rotating cylinder electrode of are presented. It is found that the unsteady diffusion layer is formed close to the rotating electrode surface. Also it was found that the sign of the zeta potential of nanoparticles has a decisive influence on the possibility of forming the composite coatings. The results of mathematical modelling are in good agreement with the experimental data.
Highlights
The metal matrix composite electrochemical coatings (MMEC) with improved and unique operational characteristics, such as wear resistance, cracking resistance, anti-friction properties, corrosion resistance, radiation resistance and high adhesion to the substrate can be produced by electrocodeposition (ECD) technics [1-5]
The particles are adsorbed onto cathode surface in combination with metal ions during ECD process and the metal matrix composite coating is formed
In 2015 [17,18] authors of this paper proposed a new mathematical model of ECD process
Summary
The metal matrix composite electrochemical coatings (MMEC) with improved and unique operational characteristics, such as wear resistance, cracking resistance, anti-friction properties, corrosion resistance, radiation resistance and high adhesion to the substrate can be produced by electrocodeposition (ECD) technics [1-5]. The particles are adsorbed onto cathode surface in combination with metal ions during ECD process and the metal matrix composite coating is formed. The particles of metals that can't be electrodeposited from aqueous electrolyte can be used as dispersed phase. To produce the MMEC with specified physical and chemical properties it is necessary to define the main relation between the parameters of the ECD process and the properties of the MMEC. The determination of such empirical relationships, in addition to its purely practical significance, will allow developing the general production methods of the MMEC with required properties and the more accurately mathematical model. There are no experimental studies dedicated to determination the impact on the ECD process a series of above mentioned parameters
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