CARBON ENCAPSULATION OF MAGNESIUM POWDERS

Cavit Eyövge
837 434

Abstract


In this study, corrosion resistance of the magnesium was tried to be improved by using solvothermal encapsulation techniques to be able to use Mg and Mg based alloys in NiMH battery negative electrode compartment. For a protective encapsulating layer, sucrose and citric acid dissolved in various solvents; such as acetone, ethanol, methanol and deionized water, were used as the carbon source. Pyrolysis of the carbon sources were carried out at temperatures below the melting point of Mg. Resulting encapsulated powders were examined with several techniques to observe the morphology after encapsulation, to determine the effectivity of the encapsulating layer in alkaline environment and to see the effects of the encapsulation process on the Mg powders in terms of chemical stability. Outcomes of the study revealed that citric acid dissolved in acetone can be a better candidate than the sucrose dissolved in acetone for encapsulating layer formation in solvothermal methods, which was also verified with the results of electrical resistivity measurements and gas emission amounts of the encapsulated powders.

Keywords


Carbon encapsulation, Magnesium powder

Full Text:

PDF

References


T.-K. Ying, X.-P. Gao, W.-K. Hu, F. Wu, D. Noréus, International Journal of Hydrogen Energy, Volume 31, Issue 4, 525-530, 2006.

X. Zhao, L. Ma, International Journal of Hydrogen Energy, Volume 34, Issue 11, 4788-4796, 2009.

H. Wang, J. Zhang, J.W. Liu, L.Z. Ouyang, M. Zhu, International Journal of Hydrogen Energy, Volume 38, Issue 25, 10932-10938, 2013.

Schroder, D. K., In Semiconductor material and device characterization (p. 7). New York: Wiley, 1990

S. Zhang, C. Deng, F.L. Liu, Q. Wu, M. Zhang, F.L. Meng, H. Gao, Journal of Electroanalytical Chemistry, Volume 689, 88-95, 2013.

D. T. Ngo, R. S. Kalubarme, M.G. Chourashiya, C.N. Park, C. J. Park, Acta, Volume 116, 203-209, 2014. AUTHOR INFORMATION