Unique corrosion resistance of ultrahigh pressure Mg-25Al binary alloys

Feng, Jiawen; Li, Hanning; Deng, Kun-kun; Fernandez, Carlos; Zhang, Qingrui; Peng, Qiuming

doi:10.1016/j.corsci.2018.08.013

Cited by 28 publications

(2 citation statements)

References 45 publications

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“…The electrochemical tests were reported in our previous work. 27 Corrosion behavior was characterized by immersion tests of plug-in specimens in 0.9 wt % NaCl aqueous solution using open circuit potential (OCP), polarization curves, electrochemical impedance spectroscopy (EIS), and hydrogen evolution. The 0.9 wt % NaCl solution was used as the electrolyte solution to simulate the body fluid.…”

Section: Methodsmentioning

confidence: 99%

A Lactoglobulin-Composite Self-Healing Coating for Mg Alloys

Feng

Pan

Yang

et al. 2021

ACS Appl. Bio Mater.

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Corrosion issue is one of the most crucial bottlenecks for extensive employment of Mg alloys, in particular under harsh engineering conditions. Differing from traditional approaches, a self-healing protective coating composed of lactoglobulin is proposed herein to offer sustainable protection to the underlying Mg parts. Corrosion resistance, evaluated by electrochemical measurements and hydrogen evolution tests, indicates that the lactoglobulin composite film exhibits nobler corrosion potential (−1.28 V SCE ), smaller corrosion current density (8.4 × 10 −6 A/cm 2 ), and lower average corrosion rate (∼0.03 mm/ y) than those of its bare counterparts. Moreover, the pre-made cracks in the film were evidently self-healed within 24 h of exposure to corrosive media. The proposed self-healing lactoglobulin composite film provides opportunities to tackle the corrosion challenges of Mg alloys.

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Section: Methodsmentioning

confidence: 99%

A Lactoglobulin-Composite Self-Healing Coating for Mg Alloys

Feng

Pan

Yang

et al. 2021

ACS Appl. Bio Mater.

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“…However, the precipitates in Mg matrix usually induce galvanic corrosion due to the potential difference, thereby inevitably deteriorating the degradation behavior[ 13 ]. Assuming that alloy elements can be completely dissolved in Mg matrix to form supersaturated solid solution, it is expected to significantly improve the degradation performance[ 14 ]. However, the solid solubility of most alloy elements in Mg matrix is extremely small, which poses a huge challenge to prepare Mg supersaturated solid solution.…”

Section: Introductionmentioning

confidence: 99%

Selective Laser Melted Rare Earth Magnesium Alloy with High Corrosion Resistance

Yang¹,

Ling²,

Yang³

et al. 2022

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Magnesium (Mg) degrades too fast in human body, which limits its orthopedic application. Single-phase Mg-based supersaturated solid solution is expected to possess high corrosion resistance. In this work, rare earth scandium (Sc) was used as alloying element to prepare Mg(Sc) solid solution powder by mechanical alloying (MA) and then shaped into implant using selective laser melting (SLM). MA utilizes powerful mechanical force to introduce numerous lattice defects, which promotes the dissolution of Sc in Mg matrix and forms supersaturated solid solution particles. Subsequently, SLM with fast heating and cooling rate maintains the original supersaturated solid solution structure. Immersion tests revealed that high Sc content significantly enhanced the corrosion resistance of Mg matrix because of the formation of protective corrosion product film, which was also proved by the electrochemical impedance spectroscopy measurements. Thereby, Mg(Sc) alloy showed a relatively low degradation rate of 0.61 mm/year. In addition, cell tests showed that the Mg(Sc) exhibited favorable biocompatibility and was suitable for medical application.

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