Електроосадження олова в присутності К₂TiO₃

Abstract

The abnormal influence of potassium metatitanate on the rate of the deposition of tin from stannate electrolyte is discussed: introduction of 1 mmol/L К2ТiО3 into working solution causes a fivefold increase of partial current Sn(VI) → Sn 0 and, respectively, the current output of tin. The analysis of the correlation of potentials' values which are installed during the process of electrodeposition of microcomposite material was carried out. The correctness between the potentials' values and sustainable forms of precipitated component at a specified pH value was determined. The possibility of formation the titanium hydride is shown in these conditions. A sharp change in morphology of the tin sediment surface in the presence of additive К2ТiО3 in the tinning electrolyte is reviewed. The single-phase nature of the obtained micro-composite material including tin and titanium is proved. To explain these facts a scheme of electrode process is proposed, whereby SnO3 2-and TiO3 2-ions are reduced with hydrogen at the cathode, where the product of metatitanate-ions reduction is titanium hydride which is capable of catalysing SnO3 2-reduction. The suggested scheme also explains the changes in the morphology of the sediment surface. The growth of the needle crystals of tin which segregate in the presence of TiO3 2-ions takes place on titanium hydride active centers.Keywords: tinning; potassium metatitanate; microcomposite material. ЕЛЕКТРООСАДЖЕННЯ ОЛОВА В ПРИСУТНОСТІ К2TiO3Віктор Ф. Варгалюк, Катерина А. Плясовська * , Олена І. Нестер Ключові слова: лудіння; калій метатитанат; мікрокомпозитний матеріал.

Examining the influence of electrosynthesis conditions on the composition of tin-oxide catalyst

“…It is known that the electrochemical technique of applying alloys [9] and composites [10][11][12] makes it possible to control the thickness and composition of the obtained deposits. Synthesis of oxides by the electrochemical method also enables obtaining films with a predetermined composition, thickness, and structure.…”