Effect of mischmetal on the corrosion properties of Mg–5Al alloy

Nam, Nguyễn Đăng; Kim, W.C.; Kim, Jae Gyoon; Shin, Kuk-Hyun; Jung, Heechul

doi:10.1016/j.corsci.2009.08.023

Cited by 44 publications

(10 citation statements)

References 35 publications

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“…However, the effects of Mm addition are still questionable in the higher potential region due to pitting corrosion [78]. This article reports the corrosion properties and passive ability of the Mg-Al-xSr (x = 0-1.5 wt%) alloy series.…”

Section: Introductionmentioning

confidence: 97%

Corrosion resistance of Mg–5Al–xSr alloys

Nam

Kim

et al. 2011

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 97%

Corrosion resistance of Mg–5Al–xSr alloys

Nam

Kim

et al. 2011

Journal of Alloys and Compounds

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“…Since the difference in electronegativity between Al and RE (EN=0.5) is bigger than that between Al and Mg (EN=0.2), thus rare earths are prone to [23] . With increasing RE addition, the more Al 4 RE phases are formed, which further suppress the formation of Mg 17 Al 12 phase [17,25,26] . The optical micrographs of the as-cast Mg-9Li-3Al-xRE alloys are shown in Fig.2.…”

Section: Methodsmentioning

confidence: 99%

“…The mischmetal with lower cost than pure rare earth has been commonly recognized as favorable additives in Mg alloys [16] . The mischmetal have been found in various naturally-occurring proportions, which is also called rare earth mischmetal, Ce mischmetal (rich in Ce), or mischmetal (Mm, rich in La and Ce) [17] . Owing to high thermal stability of mischmetal compound, the addition of La and Ce can increase the hardness, strength and corrosion-resistant of Mg alloys [18][19][20] .…”

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confidence: 99%

Effect of Mischmetal on Microstructure and Mechanical Properties of Superlight Mg-Li Alloys

Yangmin

Peng

et al. 2017

Rare Metal Materials and Engineering

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The influence of mischmetal (lanthanum and cerium) on the microstructure and mechanical properties of Mg-9Li-3Al-xRE (x=0, 0.5, 1, 1.5, 2, wt%) alloys was investigated by optical microscope, scanning electron microscope (SEM) with an energy dispersive spectroscope (EDS), and X-ray diffraction (XRD). In as-cast alloys, Al4RE phase is formed, the content of Mg17Al12 phase and the volume fraction of α-Mg phase decrease. In addition, α-Mg phase is refined and the mechanical properties of Mg-9Li-3Al-xRE alloys are improved. However, with increasing mischmetal content, the size of Al4RE phase increases and the mechanical properties decrease. In extruded alloys, Al4RE phase is broken into the particles of 1~3 μm in the β-Li matrix phase and α/β interphase. And the best mechanical properties are obtained for Mg-9Li-3Al-1.5RE alloy with a tensile strength of 228.3MPa and elongation of 20.8%, increased by 88.6% and 197.4%, respectively, compared with as-cast Mg-9Li-3Al alloy.

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“…2). 40 Thus, small Nd and Gd additions (0?8 wt-%) promoted the precipitation of AlMn-Nd/Gd inclusions, whereas further additions (1?0-1?5 wt-%) increased the population density of Al 2 Nd and Al 2 Gd intermetallic compounds. Energy dispersive X-ray analysis of the extracted Al-Mn-Nd and AlMn-Gd particles revealed an average composition of 63Al-27Mn-10Nd (at-%) and 67Al-25Mn-8Gd (at-%) respectively.…”

Section: Microstructural Characterisationmentioning

confidence: 97%

Salt spray corrosion behaviour of new Mg–Al alloys containing Nd or Gd

Mohedano

Arrabal

Pardo

et al. 2013

Corrosion Engineering, Science and Technology

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The influence of chloride concentration on the salt spray corrosion behaviour of new AZ91D and AM50 alloys containing rare earth (RE) elements was evaluated. The corrosion rate of both materials increased with increasing chloride concentration, particularly for NaCl concentrations above 2 wt-%. The addition of Nd or Gd reduced the amount of b-Mg 17 Al 12 phase and resulted in the formation of RE containing intermetallics that were less noble than the Al-Mn inclusions but more noble than the b-Mg 17 Al 12 phase. The latter modifications decreased the corrosion rate of the AM50 alloy by up to 90% but did not give a clear benefit to the corrosion resistance of the AZ91D alloy.

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Effect of mischmetal on the corrosion properties of Mg–5Al alloy

Cited by 44 publications

References 35 publications

Corrosion resistance of Mg–5Al–xSr alloys

Corrosion resistance of Mg–5Al–xSr alloys

Effect of Mischmetal on Microstructure and Mechanical Properties of Superlight Mg-Li Alloys

Salt spray corrosion behaviour of new Mg–Al alloys containing Nd or Gd

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