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Article Dans Une Revue Corrosion Science Année : 2013

New zinc-rare earth alloys: Influence of intermetallic compounds on the corrosion resistance

Résumé

New ZnRE 1-2 wt.% alloys (RE = Ce, La and Mischmetal) were synthesized. Microstructural analyses reveal that rare-earth metals are exclusively present in intermetallic phases contained within the zinc matrix: CeZn11 or LaZn13 in binary alloys; Ce1-xLaxZn11 and CeyLa1-yZn13 in Zn-Mischmetal alloys. This phase equilibrium is confirmed by a thermodynamic description of the Zn-rich corner of Zn-Ce-La system. Both intermetallic phases CeZn11 and LaZn13 induce a cathodic inhibition of the corrosion of the ZnRE alloys in comparison with pure zinc. In the specific case of cerium addition, a significant anodic inhibition is also observed.

Dates et versions

hal-01289985 , version 1 (17-03-2016)

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Delphine Veys-Renaux, Khadoudj Guessoum, Emmanuel Rocca, Nicolas David, Kamel Belhamel. New zinc-rare earth alloys: Influence of intermetallic compounds on the corrosion resistance. Corrosion Science, 2013, 77, pp.342-349. ⟨10.1016/j.corsci.2013.08.024⟩. ⟨hal-01289985⟩
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