New zinc–rare earth alloys: Influence of intermetallic compounds on the corrosion resistance
Source abstract
Abstract
Abstract 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: CeZn 11 or LaZn 13 in binary alloys; Ce 1 − x La x Zn 11 and Ce y La 1 − y Zn 13 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 CeZn 11 and LaZn 13 induce a cathodic inhibition of the corrosion of the Zn–RE alloys in comparison with pure zinc. In the specific case of cerium addition, a significant anodic inhibition is also observed.
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Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · Corrosion Behavior and Inhibition · Metallurgical and Alloy Processes
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