The Corrosion Behavior of Mg5Y in Nominally Distilled Water

Cao, Fuyong; Zheng, Dajiang; Song, Guang‐Ling; Shi, Zhiming; Atrens, Andrej

doi:10.1002/adem.201700986

Cited by 10 publications

(8 citation statements)

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“…While the work of Atrens and co‐workers on Mg corrosion is well known, perhaps the most extensive Australian investigation on Mg–REE alloys to date is that performed at Monash University, in conjunction with CSIRO . This work spans corrosion, microstructure, and mechanical properties, and a full reckoning is beyond the scope of the current article, but several interesting findings can be discussed.…”

Section: Rare Earth Application To Magnesium Alloysmentioning

confidence: 98%

“…This was proposed to arise due to the ability of Y to improve the stability/density of the oxide/hydroxide layer, much as seen in the ignition tests discussed previously . If the stability of the hydroxide film is sufficiently increased (particularly in mild/Cl − ‐free media), this appears to overcome the galvanic coupling effects from the intermetallic phases . Namely, in a study of Mg–Y binary alloys in nominally distilled water, it was observed that so long as the hydroxide layer in the immediate vicinity of a Mg–Y intermetallic is stable, the galvanic effect of that particle is negated despite the intermetallic particle itself not chemically differing relative to active particles .…”

Section: Rare Earth Application To Magnesium Alloysmentioning

confidence: 98%

“…Given the poor corrosion resistance of Mg, work to this end is perhaps the most important; in this regard, it is difficult to discuss the oxidation and corrosion of Mg without highlighting the work of Atrens and co‐workers of the University of Queensland, who have contributed significantly to the field over recent decades. Although their work spans all aspects of Mg corrosion, they have performed investigations specific to the influence of certain REEs on Mg reactivity …”

Section: Rare Earth Application To Magnesium Alloysmentioning

confidence: 99%

“…However, this group is perhaps best known for their work on corrosion of Mg in aqueous environments; here, research has focused primarily on Y in a range of processing conditions, with studies on corrosion in deionized water, and solutions containing NaCl, NaOH, and Na 2 SO 4 . More limited investigations have also been performed on Gd, La, Ce, and Nd, although findings from these investigations are of varying novelty.…”

Section: Rare Earth Application To Magnesium Alloysmentioning

confidence: 99%

“…If the stability of the hydroxide film is sufficiently increased (particularly in mild/Cl − ‐free media), this appears to overcome the galvanic coupling effects from the intermetallic phases . Namely, in a study of Mg–Y binary alloys in nominally distilled water, it was observed that so long as the hydroxide layer in the immediate vicinity of a Mg–Y intermetallic is stable, the galvanic effect of that particle is negated despite the intermetallic particle itself not chemically differing relative to active particles . Still, it must be emphasized that these results are from comparatively innocuous media; corrosion in Cl − ‐containing solutions remains excessive, and unfortunately this ion is frequent in real‐world applications.…”

Section: Rare Earth Application To Magnesium Alloysmentioning

confidence: 99%

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The Application of the Rare Earths to Magnesium and Titanium Metallurgy in Australia

Biesiekierski

Wen

2019

Advanced Materials

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These elements have huge relevance in the modern world, in applications spanning electronics, biomedicine, structural materials, and more; many rely on their unique electronic properties as the only nonradioactive elements with electrons occupying the f-subshell. [1] However, REEs have long been topics of moderate interest for their application in metallurgy, such as the bulk purification of steels and other alloys, or the improvement of the hightemperature properties of Mg alloys. [3] In recent years, however, progress in materials science has intensified interest in the REE elements. Notably, these are the rise of magnesium (Mg)-based alloys for both biodegradable implant materials and highly weight-sensitive applications in the automotive and aerospace sectors, and the growth of powder-metallurgy (PM) and additive-manufacturing (AM) fabrication methods for titanium (Ti). This change can be seen graphically in Figure 1, with the sharp spike in publications starting shortly after the new millennium. Thus, the importance of REEs, particularly the L-REEs, is highlighted in both the biomedical sector and in high-performance aerospace and automotive roles. Given the biomedical sector represented some 62 000 jobs and $4.9 billion of value to the national GDP in 2016, [5] Australia is well positioned to benefit from advances in biomedical technology; the recent launch of the Australian Space Agency suggests that the aerospace sector may soon grow as well. [6] As such, here, we will attempt to summarize relevant research over the past decade in this field, highlighting work from Australian institutions; the aim of this summary is to help assist in both understanding the current state-of-the-art, and to identify promising areas for future research where Australia is well positioned to leverage existing expertise. Rare Earth Application to Magnesium AlloysMuch of the current research on REE-containing alloys is concerned with Mg alloy systems. Mg-based alloys have long been attractive options in aerospace and automotive applications; at ≈1.7-8 g cm −3 , Mg-based alloys have the lowest density of the common structural metals by a substantial margin, [7] yielding exceptional specific strengths/stiffnesses ideal for weightsensitive applications. Beyond aerospace and automotive sectors, however, the last two decades have seen the sharp rise in interest by the biomedical sector. In this regard, Mg and its alloys are again well suited; Mg shows exceedingly low toxicities coupled with numerous bioactive effects, and can achieve Rare earth elements (REEs) have found application in metallurgical processes for nearly a century due to their unique chemical and physical properties but have gained increased attention in recent decades. Notably, the use of these elements may assist in the development of advanced magnesium and titanium products for applications spanning biomedicine, aerospace, and the automotive industry. To this end, current progress in this area, highlighting work done in Australian research organizations with partic...

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Section: Rare Earth Application To Magnesium Alloysmentioning

confidence: 98%

Section: Rare Earth Application To Magnesium Alloysmentioning

confidence: 98%

Section: Rare Earth Application To Magnesium Alloysmentioning

confidence: 99%

Section: Rare Earth Application To Magnesium Alloysmentioning

confidence: 99%

Section: Rare Earth Application To Magnesium Alloysmentioning

confidence: 99%

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