Thursday, 7 April, 2011, 08:29
Posted by Honorata Kazimierczak
In March 2011 I begun the study of hydrogen release on different surfaces from citrate solutions. Surface-limited kinetics of hydrogen release are derived for arbitrary surface coverage (Fe, Zn,Sn).Posted by Honorata Kazimierczak
For this purpose, first, it was necessary to prepare the surface of the samples for further investigation . Therefore on 1-3.03.2011 and 7-11.03.2011 I ran the process of potentiostatic deposition of tin and zinc from citrate bath on samples of steel (previously etched in a solution of oxalic acid with hydrogen peroxide and defatted in acetone). Then I prepare a series of citrate baths. Electrolytes were prepared with analytical grade reagents and deionized water. A range of solutions with varying citrate concentration and pH were prepared by dissolving appropriate amounts of C6H5Na3O7.2H2O and C6H8O7.H2O, adjusting the pH using H2SO4 and NaOH and mixing of solutions. The citrate concentration was varied between 0,1 M and 0,7 M and the pH between 1.0 and 9.0.
Subsequently, on from 14 to 31 march 2011 I conducted research of hydrogen release from selected baths on surfaces of steel, tin and zinc . the experiment were carried out and controlled by means of PARSTAT 2273 potentiostat. Voltammetric curves were determined under various hydrodynamic conditions by the rotating disc electrode technique.
The results of all carried out tests, and plans for further research were discussed in detail with the tutor Prof. Associate. dr hab. Piotr Ozga.
In March 2011 I also attended in the following seminars:
- M. Sc. Eng. Piotr Bobrowski: ‘Investigations on the catalytic Au/TiO2 modelsystem’ (4.03.2011)
- M. Sc. Eng Rafal Abram: ‘Atomistic simulations of the process of phase separation in the Fe-Cr system’ (11.03.2011)
- Professor Pawel Zieba: ‘Mass and charge transport in polycrystalline materials’(11.03.2011)
- Associate Professor Marek Faryna: ‘Correlation between ceramics microstructure and functional properties’;(18.03.2011)
- Professor Henryk Paul: ‘Instability of plastic flow and their role in texture transformations in fcc metals’(18.03.2011)
- M. Sc. Eng Artur Kudyba: ‘Influence of technological factors on the wettability of soldering’(25.03.2011)
- Associate Professor Lidia Litynska-Dobrzynska: ‘Development of aluminium alloys’ (25.03.2011).
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