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

Delphine Veys-Renaux; Khadoudj Guessoum; Emmanuel Rocca; Nicolas David; Kamel Belhamel

doi:10.1016/j.corsci.2013.08.024

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

Delphine Veys-Renaux
, Khadoudj Guessoum
, Emmanuel Rocca
, Nicolas David
, Kamel Belhamel

Research output: Contribution to journal › Article › peer-review

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: CeZn₁₁ or LaZn₁₃ in binary alloys; Ce_1-xLa_xZn₁₁ and Ce_yLa_1-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 Zn-RE alloys in comparison with pure zinc. In the specific case of cerium addition, a significant anodic inhibition is also observed.

Original language	English
Pages (from-to)	342-349
Number of pages	8
Journal	Corrosion Science
Volume	77
DOIs	https://doi.org/10.1016/j.corsci.2013.08.024
Publication status	Published - 1 Dec 2013
Externally published	Yes

Keywords

A. Intermetallics
A. Rare earth elements
A. Zinc
B. Polarization
B. SEM
C. Thermodynamic diagrams

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10.1016/j.corsci.2013.08.024

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title = "New zinc-rare earth alloys: Influence of intermetallic compounds on the corrosion resistance",

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: 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 Zn-RE alloys in comparison with pure zinc. In the specific case of cerium addition, a significant anodic inhibition is also observed.",

keywords = "A. Intermetallics, A. Rare earth elements, A. Zinc, B. Polarization, B. SEM, C. Thermodynamic diagrams",

author = "Delphine Veys-Renaux and Khadoudj Guessoum and Emmanuel Rocca and Nicolas David and Kamel Belhamel",

year = "2013",

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doi = "10.1016/j.corsci.2013.08.024",

language = "English",

volume = "77",

pages = "342--349",

journal = "Corrosion Science",

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TY - JOUR

T1 - New zinc-rare earth alloys

T2 - Influence of intermetallic compounds on the corrosion resistance

AU - Veys-Renaux, Delphine

AU - Guessoum, Khadoudj

AU - Rocca, Emmanuel

AU - David, Nicolas

AU - Belhamel, Kamel

PY - 2013/12/1

Y1 - 2013/12/1

N2 - 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 Zn-RE alloys in comparison with pure zinc. In the specific case of cerium addition, a significant anodic inhibition is also observed.

AB - 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 Zn-RE alloys in comparison with pure zinc. In the specific case of cerium addition, a significant anodic inhibition is also observed.

KW - A. Intermetallics

KW - A. Rare earth elements

KW - A. Zinc

KW - B. Polarization

KW - B. SEM

KW - C. Thermodynamic diagrams

UR - https://www.scopus.com/pages/publications/84885186879

U2 - 10.1016/j.corsci.2013.08.024

DO - 10.1016/j.corsci.2013.08.024

M3 - Article

AN - SCOPUS:84885186879

SN - 0010-938X

VL - 77

SP - 342

EP - 349

JO - Corrosion Science

JF - Corrosion Science

ER -

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

Abstract

Keywords

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