Corrosion of high purity Mg, Mg2Zn0.2Mn, ZE41 and AZ91 in Hank’s solution at 37 °C

Abidin, Nor Ishida Zainal; Atrens, Aleks D.; Martin, Darren J.; Atrens, Andrej

doi:10.1016/j.corsci.2011.06.030

Cited by 204 publications

(90 citation statements)

References 74 publications

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“…Specimens for microstructural observation were polished and etched with a solution of the saturated picric acid, acetic acid of 1 mL, distilled water of 1 mL and ethanol of 7 mL [21]. Phase morphologies of the alloys were observed using scanning electron microscope (SEM, Vega III LMU/LMH, TESCAN, Brno, Czech Republic) equipment with an energy dispersive X-ray spectrometer (EDS).…”

Section: Methodsmentioning

confidence: 99%

The Effect of Rod-Shaped Long-Period Stacking Ordered Phases Evolution on Corrosion Behavior of Mg95.33Zn2Y2.67 Alloy

et al. 2018

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The morphology evolution of long-period stacking ordered (LPSO) phases on corrosion behavior of Mg95.33Zn2Y2.67 alloy is investigated systematically during as-cast, pre-extrusion heat-treated, as-extruded and post-extrusion heat-treated conditions. The second phases in the as-cast alloy are only LPSO phases with a few Y particles. The pre-extrusion heat treatment changed LPSO phases from blocks into a rudimentary rod shape with lamellar structure, subsequently into fine fragments by extrusion, and then into a regular rod shape with lamellar structure followed by post-extrusion heat treatment. Immersion tests and electrochemical measurements in 3.5 wt % NaCl solution reveal that the post-extrusion heat-treated alloy has the best corrosion resistance with the lowest corrosion rate. This is attributed to the rod-shaped LPSO phases, which could hinder corrosion proceeding, and result in corrosion orientated along the direction of rods and forming relatively dense long-strip corrosion products. Our findings demonstrate that the improved corrosion resistance of magnesium alloys with LPSO phases can be tailored effectively by the proceeding technology and post-heat treatment.

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Section: Methodsmentioning

confidence: 99%

The Effect of Rod-Shaped Long-Period Stacking Ordered Phases Evolution on Corrosion Behavior of Mg95.33Zn2Y2.67 Alloy

et al. 2018

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“…The crevice solution becomes increasingly aggressive due to the increased concentration of Cl -and H + (Cheng et al, 2007). The overall reaction can be written as: The pH of normal human blood is 7.4 ± 0.05; values outside of the range 7-7.7 are deemed terminal (Zainal Abidin et al, 2011). Hence, it is important to limit any potential corrosion from biomaterials which fluctuates the pH of the blood.…”

Section: Crevice Corrosion Testingmentioning

confidence: 99%

Corrosion of Ti biomaterials

McElligott¹

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The experimental investigation of corrosion stability of Ti-35.4Zr-28Nb in synthetic body fluid was conducted to aid in the development of a porous Ti alloy for use as a bone replacement material. The corrosion analysis was conducted using immersion testing for 28 days, Open Circuit Potential (OCP), Electrochemical Impedance Spectroscopy (EIS) and potentiodynamic polarisation curves. The corrosion performance of the Ti alloy was compared to that of commercial purity (CP Ti) Grade 2 under in-vitro testing conditions in:1. Hanks' solution at 37 °C 2. 3.5% NaCl solution at 95 °C Immersion testing results of both the materials showed negligible weight loss and low concentration of Ti, Zr and Nb, which indicates a low corrosion rate. In addition, the electrochemical testing indicated passivation behaviour which was further supported by the partial stabilisation of current density and overall low current densities (in the order of 10 -6 A/cm 2 ). The OCP measurement also described a passivation behaviour with an increase in the corrosion potential and a stabilised curve over time.Overall, from the experimental results, no significant evidence of crevice corrosion was observed under the testing conditions indicating that both CP Ti and the Ti alloy are not sensitive to crevice corrosion.iii

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“…This should also allow the AZ91 sample to undergo heavy pitting corrosion as Zainal said that after the incubation period, the AZ91 becomes susceptible to pitting corrosion [16].…”

Section: Mass Loss Datamentioning

confidence: 99%

“…As (1) shows, the corrosion of Mg results in one molecule of Hydrogen gas (H2) produced for every mol of Mg corroded [5,12,15,16]. To collect the H2 evolved gas from the corroding Mg sample, each sample is suspended below a funnel and an inverted burette as shown in figure 2.…”

Section: Hydrogen Evolution Rate Analysismentioning

confidence: 99%

“…In this, a prepared and measured sample is submerged in a solution, in general a SBF such as Hanks' solution [15,16] at a physiological temperature of 37°C [12]. The sample is restrained with fishing line which is wedged between the funnel and inverted burette to secure the sample in place for the duration of the test.…”

Section: Previous Immersion Test Apparatusmentioning

confidence: 99%

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Influence of cations on the corrosion of biodegradable Mg alloys in Hanks’ solution

Hardy¹

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Biodegradable implants have gather increasing interest in modern times, due to their unique properties. Of these implants, Mg has gathered interest due to its favourable mechanical properties and highly corrosive nature. Extensive research has been undertaken to investigate the effects of pH and anions in the solution, however, little research has gone into investigating the influence of cations in the solution, especially in physiological conditions.

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Corrosion of high purity Mg, Mg2Zn0.2Mn, ZE41 and AZ91 in Hank’s solution at 37 °C

Cited by 204 publications

References 74 publications

The Effect of Rod-Shaped Long-Period Stacking Ordered Phases Evolution on Corrosion Behavior of Mg95.33Zn2Y2.67 Alloy

The Effect of Rod-Shaped Long-Period Stacking Ordered Phases Evolution on Corrosion Behavior of Mg95.33Zn2Y2.67 Alloy

Corrosion of Ti biomaterials

Influence of cations on the corrosion of biodegradable Mg alloys in Hanks’ solution

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