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The influence of yttrium (Y) on the corrosion of Mg–Y binary alloys

The influence of yttrium (Y) on the corrosion of Mg–Y binary alloys,10.1016/j.corsci.2010.07.019,Corrosion Science,Ming Liu,Patrik Schmutz,Peter J. Ug

The influence of yttrium (Y) on the corrosion of Mg–Y binary alloys   (Citations: 7)
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Corrosion of Mg–Y alloys was studied using electrochemical evaluations, immersion tests and direct observations. There were two important effects. In 0.1M NaCl, the corrosion rate increased with increasing Y content due to increasing amounts of the Y-containing intermetallic. In 0.1M Na2SO4, the corrosion rate decreased with increasing Y content above 3%, attributed to a more protective surface film, despite the intermetallic. The corrosion rate evaluated by electrochemical impedance spectroscopy was somewhat smaller than that evaluated from H evolution as expected from the Mg corrosion mechanism. A mechanism is proposed for filiform corrosion. Direct in situ corrosion observations revealed that a predominant feature was hydrogen evolution from particular parts of the alloy surface.
Journal: Corrosion Science - CORROS SCI , vol. 52, no. 11, pp. 3687-3701, 2010
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