Investigation of hydrogen embrittlement of Sn–Al alloy during contact with water vapour |
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| Authors: | F Muktepavela M Vasylyev A Czerwinski Z Rogulski |
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| Institution: | (1) Institute of Solid State Physics University of Latvia, 1063 Riga, Latvia,;(2) Institute of Metal Physics, Ukrainian Academy of Sciences, 252142 Kiev, Ukraine,;(3) Department of Chemistry, The University of Warsaw, 02-093 Warsaw, Poland,;(4) Industrial Chemistry Research Institute, 01-793 Warsaw, Poland, |
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| Abstract: | The humid air induced processes of embrittlement of the Sn–Al alloy and hydrogen emission have been investigated. Using the
secondary-ion mass spectrometry, X-ray, scanning electron microscopy and energy-dispersive X-ray spectrometry techniques it
was found that the brittleness is caused by a failure of phase adhesion due to accumulation of hydrogen and formation of oxidized
layers on phase boundaries during contact of the alloy with water vapour. Specific physical and electrochemical properties
of the Sn/Al phase boundary satisfy conditions for the formation of atomic hydrogen and its reaction with Sn. Electrochemical
corrosion plays an important role at the stage of formation of atomic hydrogen. The penetration of hydrogen and its accumulation
in the bulk of the alloy is due to the high energy of the phase boundary and the low energy of formation of unstable tin hydride.
Electronic Publication |
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| Keywords: | Sn– Al alloy Embrittlement Phase boundary Hydrogen |
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