Effects of Sr on microstructure and corrosion resistance in simulated body fluid of as cast Mg–Nd–Zr magnesium alloys

Zhang, Xiaobo; He, Xiancong; Xue, Yanjun; Wang, Z. Z.; Wang, Q.

doi:10.1179/1743278213y.0000000143

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…In addition, Sr is able to refine the grain sizes and improve the mechanical properties and corrosion resistance of Mg alloys (Bornapour, Muja, Shum-Tim, Cerruti, & Pekguleryuz, 2013;Gu, Xie, Li, Zheng, & Qin, 2012;Li et al, 2014b;Zhang et al, 2014b). For these reasons, it attracted Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 6/9/15 3:18 AM the attention of researchers for use as an alloying element for biodegradable Mg alloys.…”

Section: Alloyingmentioning

confidence: 98%

“…The corrosion modes of the as-cast Mg-0.5Sr in vitro and the as-rolled Mg-2Sr in vivo are localized and caused by microgalvanic couples due to the presence of the Mg 17 Sr 2 phase, as shown in Figures 4 and 5, respectively. Zhang, He, Xue, Wang and Wang (2014b) found that when the content of Sr is 2 wt%, microgalvanic corrosion plays a dominant role and the corrosion is sharply accelerated. The results of these studies demonstrate the significance of factors such as conditions and the effects of the other alloying elements when developing novel Mg alloys.…”

Section: Alloyingmentioning

confidence: 99%

“…Erinc, Sillekens, Mannens, and Werkhoven (2009) suggested that the corrosion rate of useful biodegradable Mg alloys in simulated body fluid (SBF) should be less than 0.5 mm/year. Regretfully, the corrosion rates of most biodegradable Mg alloys are higher than 0.5 mm/year (Gu, Zheng, Cheng, Zhong, & Xi, 2009;Li, Gu, Lou 2008; Zhang, He, Xue, Wang, & Wang, 2014b), and therefore unsatisfactory for clinical applications. Surface modification technologies, including coatings (Rojaee, Fathi, & Raeissi, 2013;Zomorodian et al, 2013), ion implantation (Jamesh, Wu, Zhao, & Chu, 2013;Zhao et al, 2013c), microarc oxidation (MAO) (Fischerauer et al, 2013;Lin et al, 2014;Narayanan, Park, & Lee, 2014), laser surface processing (Taltavull et al, 2014), etc., are widely implemented to enhance the corrosion resistance and biocompatibility of Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of corrosion resistance of magnesium alloys for biomedical applications

Chen¹,

Dai²,

Zhang³

2015

Corrosion Reviews

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In recent years, magnesium (Mg) alloys have attracted great attention due to superior biocompatibility, biodegradability, and other characteristics important for use in biodegradable implants. However, the development of Mg alloys for clinical application continues to be hindered by high corrosion rates and localized corrosion modes, both of which are detrimental to the mechanical integrity of a load-bearing temporary implant. To overcome these challenges, technologies have been developed to improve the corrosion resistance of Mg alloys, among which surface treatment is the most common way to enhance not only the corrosion resistance, but also the bioactivity of biodegradable Mg alloys. Nevertheless, surface treatments are unable to fundamentally solve the problems of fast corrosion rate and localized corrosion. Therefore, it is of great importance to alter and improve the intrinsic corrosion behavior of Mg alloys for biomedical applications. To show the significance of the intrinsic corrosion resistance of biodegradable Mg alloys and attract much attention on this issue, this article presents a review of the improvements made to enhance intrinsic corrosion resistance of Mg alloys in recent years through the design and preparation of the Mg alloys, including purifying, alloying, grain refinement, and heat treatment techniques. The influence of long-period stacking-ordered structure on corrosion behavior of the biodegradable Mg alloys is also discussed.

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Section: Alloyingmentioning

confidence: 98%

Section: Alloyingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improvement of corrosion resistance of magnesium alloys for biomedical applications

Chen¹,

Dai²,

Zhang³

2015

Corrosion Reviews

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“…The improved corrosion resistance of the Mg–Nd–Zn–Sr–Zr alloy is probably attributed to the Sr addition, which can refine microstructure of the Mg alloys. 39…”

Section: Resultsmentioning

confidence: 99%

Microstructure, mechanical and corrosion properties of Mg–Nd–Zn–Sr–Zr alloy as a biodegradable material

Zhang

Chen

et al. 2015

Materials Science and Technology

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The Mg–2·5Nd–0·3Zn–0·1Sr–0·4Zr (wt-) alloy was prepared by gravity casting. Solution treatment and extrusion were conducted. The microstructure, mechanical properties, and corrosion behaviour of the alloy under as cast, T4-treated, and as extruded conditions were evaluated using scanning electron microscope, tensile test, microhardometre, immersion test, and electrochemical test. The results show that the as extruded alloy exhibits the highest ultimate tensile strength (231 MPa), elongation (36·6), and microhardness (57·8 HV). The as cast alloy shows the best corrosion resistance because the relative continuously distributed eutectic phase with noble corrosion potential acts as a corrosion barrier. The as extruded Mg–Nd–Zn–Sr–Zr alloy with high ductility and good corrosion resistance is desirable for preparing biodegradable implants.

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“…The main reason is that the TLM alloy includes Ti, Mo, Nb and Zr elements, and these elements can be reacted with O element, then generated the compact and protective oxide coating Mo 2 O 3 , Nb 2 O 5 , ZrO 2 and TiO 2 . 24 Among of the oxide coating, ZrO 2 and TiO 2 have the characteristic of self-healing. 25 The oxides belong to semiconductor and have large resistance.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical behaviour of Ti–25Nb–3Mo–3Zr–2Sn biomedical alloy in different simulated physiological environments

Wang

Huang

Meng

2015

Materials Science and Technology

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The electrochemical corrosion behaviour of biomedical Ti-25Nb-3Mo-3Zr-2Sn (TLM) alloy was investigated in various simulated body fluids at 37¡0?5uC utilising potentiodynamic polarisation and current-time curves. The Ti-6Al-4V (TC4) alloy was also investigated to make a comparison. The different simulated body fluids comprised of 0?9%NaCl saline, Hank's and Ringer's solution were employed. The effect of heat treatment on the electrochemical behaviour of the TLM alloy was also considered. It was discovered that all the test specimens were passivated once immersed into the simulated body fluids. It was also found that the TLM alloy has poorer corrosion resistance in Hank's solution, due to the chemical composition of the Hank's. After different heat treated, the TLM alloy had different phases and microstructure, and the corrosion behaviour of the TLM alloy was different. In this study, after the heat treatment of 760uC/1 h/ACz550uC/6 h/AC, the TLM alloy had better corrosion resistance. Owing to the corrosion resistance of the TLM alloy was influenced by numerous factors, such as microstructure and the chemical composition of electrolyte, the corrosion behaviour of the TLM alloy is complex. By comparing with the corrosion behaviour of the TC4 alloy, the TLM alloy has poorer corrosion resistant than the TC4 alloy under the same conditions. But the current-time curves of the TLM alloy were more stable than these of the TC4 alloy with further experiments, because of the more passivation film on the surface of the TLM alloy.

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Effects of Sr on microstructure and corrosion resistance in simulated body fluid of as cast Mg–Nd–Zr magnesium alloys

Cited by 11 publications

References 30 publications

Improvement of corrosion resistance of magnesium alloys for biomedical applications

Improvement of corrosion resistance of magnesium alloys for biomedical applications

Microstructure, mechanical and corrosion properties of Mg–Nd–Zn–Sr–Zr alloy as a biodegradable material

Electrochemical behaviour of Ti–25Nb–3Mo–3Zr–2Sn biomedical alloy in different simulated physiological environments

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