Influence of technological parameters of electrolysis and the composition of the electrolyte on the physical properties of the dispersed iron

Abstract

Problem definition.  Synthesis of a technological electrolytic iron powder with controlled particle size and shape, the desired structural, physical and functional properties. Methodology. For the dispersed iron electrolytic deposition process were using a soluble steel anode and titanium cathode. Electrolyte − sulfate; form cathode − plate; electrolysis time − 1 hour. Experimental studies were carried out in accordance with the plan of full factorial experiment (FFE) 2³, as well as with the use of regression analysis. The average particle size and morphology was determined using optical microscopy method. Findings. According to the results of experiments obtained polynomial models that adequately describe the relationship established parameters. The most important factors are the circulation speed, current density and iron sulphate concentration. The presence of a synergistic effect of joint influence cathode current density and electrolyte acidity on the iron cathode precipitation properties has been determined. When simultaneous increase of these parameters there is a significant coarsening of iron powder particles. With increasing rate electrolyte circulation average particle size increases. Reduced concentration of iron sulfate in the interval of variation leads to the formation of very thin and light cathode precipitation with a bulk density of less than. Originality. First defined patterns combined influence of electrolysis process technological factors (current density, temperature and circulation speed of the electrolyte), as well as electrolyte composition, on particle morphology and properties of the iron powder has been determined in the first. Practical value. The practical significance of the results is that the optimal levels of the main disperse iron electrodeposition technological parameters to provide the specified characteristics of controlled electrolytic iron powder and the expansion of application areas.