Influences of the quantity of Mg2Sn phase on the corrosion behavior of Mg–7Sn magnesium alloy

Liu, Xianbin; Shan, Dayong; Song, Yingwei; Chen, Rongshi; Han, En‐Hou

doi:10.1016/j.electacta.2010.12.030

Cited by 133 publications

(71 citation statements)

References 18 publications

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“…The XRD results given in Fig. 2 indicate that the main second phase in the extruded alloys is Mg2Sn, as typically observed in Mg-Sn based alloys [16,[27][28][29][30]. From Fig.…”

Section: Hemolysis Testsmentioning

confidence: 95%

“…As a kind of common alloying ingredient, zinc(Zn) is often added for helping improve the mechanical properties and overcome the harmful corrosive effects by means of solid solution strengthening and age hardening [16][17][18][19]. Also, zinc is one of themost abundant nutritionally essential elements in the human body and released Zn ions can be easily absorbed [20,21].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure, mechanical properties, corrosion behavior and hemolysis of as-extruded biodegradable Mg-Sn-Zn alloy

Hou

Zhong

Pan

et al. 2016

AIP Conference Proceedings

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Synthesis of biodegradable Mg-Zn alloy using mechanical alloying: Effect of ball to powder weight ratio AIP Conference Proceedings 1756, 020001 (2016) and mechanical properties, as well as good biocompatibility, and are expected to totally biodegrade in the body environment. The microstructure mechanical properties, corrosion behaviors and hemolysis of biodegradable Mg-Sn-Zn alloy were investigated under three extrusion ratios in the present work. It is revealed that the as-extruded microstructure is obviously refined with smaller grains compared with the as-cast structure while some twins form simultaneously. The tensile strengths of the as-extruded alloys fabricated with the higher extrusion ratio is 249MPa, and elongations is 16.3% respectively. Besides, the corrosion rate of as-extruded magnesium alloys increases with the increasing extrusion ratio. The hemolysis test result shows that the hemolysis rate of biodegradable magnesium alloys fabricated with the higher extrusion ratio is 4.8%, when hemolysis rate lower than 5% has been demonstrated safe according to ISO 10993-4. In conclusion, the as-extruded biodegradable Mg-Sn-Zn alloy shows great potential as a novel medical implant material.

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“…The XRD results given in Fig. 2 indicate that the main second phase in the extruded alloys is Mg2Sn, as typically observed in Mg-Sn based alloys [16,[27][28][29][30]. From Fig.…”

Section: Hemolysis Testsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical properties, corrosion behavior and hemolysis of as-extruded biodegradable Mg-Sn-Zn alloy

Hou

Zhong

Pan

et al. 2016

AIP Conference Proceedings

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“…Moreover, Mg(OH) 2 layer is strongly attacked in the presence of chloride anions to produce soluble compounds [27].…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Degradation characteristics of Mg0.8Ca in saline solution with and without albumin protein investigated by electrochemical impedance spectroscopy

Crimu

Bolat

Munteanu

et al. 2014

Materials & Corrosion

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Biodegradable magnesium-calcium (MgCa) alloy is a very attractive biomaterial. Binary Mg0.8Ca alloy was fabricated. X-ray diffraction (XRD) analysis and optical microscopy observed showed that Mg0.8Ca alloy was composed of a(Mg) phase. The electrochemical impedance spectroscopy (EIS) technique was used for the study on the degradation characteristics of Mg0.8Ca alloy. Because the proteins have a role on the passivation of metals, the effect of albumin protein addition in NaCl solution on the electrochemical behaviour of Mg0.8Ca alloy was studied. It has been shown that in 0.9 wt% NaCl solution the impedance was mainly characterised by one capacitive and one inductive effect, which related to the alloy charge transfer reaction and the relaxation of the absorbed corrosion compounds. The addition of 37.5 mg/mL albumin protein to 0.9 wt% NaCl solution increased the impedance compared to that without albumin protein. The equivalent circuits simulating the electrochemical behaviour of Mg0.8Ca alloy in 0.9 wt% NaCl solution with and without albumin protein were proposed. The surface morphology of the Mg0.8Ca samples after 1-week immersion in Mg0.8Ca alloy in 0.9 wt% NaCl solution with albumin protein was studied using scanning electron microscopy (SEM). The electrochemical mechanism for degradation of Mg0.8Ca alloy in 0.9 wt% NaCl solution is related to the albumin protein addition.

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“…This statement is also supported by Table 1 which provides a compilation of corrosion rates for high-purity (HP) Mg [100][101][102][103][104][105][106][107] in comparison to corrosion rates measured for Mg alloys in recent research in solutions like 3% NaCl [49,58,70,76,77,88,89,98,. The corrosion rate of high purity Mg is $0.3 mm y À1 in such solutions, although individual measurements can give values up to 1.8 mm y À1 .…”

Section: Corrosion Of Mg Alloysmentioning

confidence: 60%

“…There are some studies, such as that by Liu et al [88], which indicates that heat treatment can decrease the corrosion rate of an alloy. Nevertheless, the corrosion rates of the heat-treated Mg-Sn alloys [88] were greater than the corrosion rate of high-purity Mg. Another such example is the study by Liu et al [89] on Mg-Zn alloys.…”

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confidence: 99%

Corrosion and stress corrosion cracking of magnesium alloys

Cao¹

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Magnesium (Mg) alloys are attractive for light-weight applications such as in the aerospace and automobile industries, due to their high strength-to-weight ratio. The widespread application of Mg alloys in automobiles can decrease fuel consumption through lightweighting, which benefits our environment. Mg alloys are also regarded as promising biodegradable implants for use in the human body. However, the poor resistance of corrosion and stress corrosion cracking (SCC) limits their more wide-spread application in both industry and medical application. It is therefore necessary to better understand the mechanisms and the important factors, which control Mg corrosion and SCC, and to find better ways to improve their corrosion and SCC performance. In this doctoral dissertation, an effort was made to understanding the following issues regarding the corrosion and SCC mechanisms, and behaviour of pure magnesium and magnesium alloys:(1) The corrosion behaviour of ultra-high-purity Mg in 3.5% NaCl solution saturated with Mg(OH) 2 (2) The corrosion behaviour of as-cast and solution-heat-treated binary Mg-X alloys in salt spray and 3.5% NaCl solution saturated with Mg(OH) 2 (3) Influence of hot rolling on the corrosion behaviour of several Mg-X alloys (4) The influence of casting porosity on the corrosion behaviour of Mg0.1Si (5) Stress corrosion cracking of several solution heat-treated Mg-X alloys (6) Stress corrosion cracking of several hot-rolled Mg-X alloys A range of advanced techniques were employed such as optical microscopy (OM), scanning electronic microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), electrochemical polarization, electrochemical impedance spectroscopy (EIS), gas collection of hydrogen evolution from corroding samples, and linearly increasing stress testing (LIST).For the ultra-high-purity Mg in 3.5% NaCl solution saturated with Mg(OH) 2 , the intrinsic corrosion rate measured with weight loss, P W = 0.25 ± 0.07 mm y -1 . The average corrosion rate measured from hydrogen evolution, P AH , was lower than that measured with weight loss, P W , attributed to dissolution of some hydrogen in the Mg specimen. The amount of dissolution under electrochemical control was a small amount of the total dissolution. A new hydride dissolution mechanism was suggested.For solution-heat-treated Mg-X alloys (X = Mn, Sn, Ca, Zn, Al, Zr, Si, Sr), corrosion rates did not meet the expectation that they should be equal to or lower than those of high-purity II Mg. There was circumstantial evidence that the higher corrosion rates were caused by the particles in the microstructure; the second phases had been dissolved.For the hot-rolled Mg-X alloys (X = Gd, Ca, Al, Mn, Sn, Sr, Nd, La, Ce, Zr or Si) in 3.5% NaCl solution saturated with Mg(OH) 2 , the corrosion rate for all Mg-X alloys (except Mg0.1Zr and Mg0.3Si) decreased after hot rolling, attributed to fine-grained alloys having a more homogeneous microstructure, and fewer, smaller second-phase particles. For Mg0.1Zr and Mg0.3Si, the corrosion rate increas...

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Influences of the quantity of Mg2Sn phase on the corrosion behavior of Mg–7Sn magnesium alloy

Cited by 133 publications

References 18 publications

Microstructure, mechanical properties, corrosion behavior and hemolysis of as-extruded biodegradable Mg-Sn-Zn alloy

Microstructure, mechanical properties, corrosion behavior and hemolysis of as-extruded biodegradable Mg-Sn-Zn alloy

Degradation characteristics of Mg0.8Ca in saline solution with and without albumin protein investigated by electrochemical impedance spectroscopy

Corrosion and stress corrosion cracking of magnesium alloys

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