Effect of 0.45 wt.% Nd Addition on the Corrosion Resistance of Extruded Mg-6Al-3Sn-2Zn Alloy

The effect of Nd microalloying on the microstructure and corrosion behavior of extruded Mg-6Al-3Sn-2Zn (ATZ632) alloys was investigated. The addition of Nd (0.45 wt.%) into the ATZ632 alloy resulted in the formation of a NdZn 1.66 Al 2.34 phase with a relatively low Volta potential of 68 ~ 78 mV. Th...

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Bibliographic Details
Published inJournal of materials engineering and performance Vol. 33; no. 16; pp. 8262 - 8273
Main Authors Lv, Bin-Jiang, Gao, Fu-Hao, Lv, Jun-Jiang, Peng, Jian
Format Journal Article
LanguageEnglish
Published New York Springer US 01.08.2024
Subjects
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Engineering Design
Materials Science
Original Research Article
Quality Control
Reliability
Safety and Risk
Tribology
microalloying
corrosion
Mg alloy
Nd
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Summary:The effect of Nd microalloying on the microstructure and corrosion behavior of extruded Mg-6Al-3Sn-2Zn (ATZ632) alloys was investigated. The addition of Nd (0.45 wt.%) into the ATZ632 alloy resulted in the formation of a NdZn 1.66 Al 2.34 phase with a relatively low Volta potential of 68 ~ 78 mV. The polarization resistance of this alloy was calculated to be 564.33 ohm cm 2 , which is approximately 7.7 times slower than that of the ATZ632 alloy. The main factors for improving the corrosion resistance of the extruded ATZ632 alloy with 0.45 wt.% Nd addition are: (1) the Nd 2 O 3 prevention of Cl − from passing through the corrosion film; (2) the formation of denser and more uniform corrosion films; and (3) the grain refinement and wakening of the (0001) base-plane texture.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-023-08526-9