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<p>This study offers significant insights into the corrosion characteristics of pure magnesium (P Mg) produced using powder metallurgy (PM), relevant to both industrial and biomedical applications. Pure magnesium specimens were compressed at 650 MPa and sintered at 525°C for 30 min. The corrosion performance was assessed in two distinct corrosive environments: 0.25 M hydrochloric acid (HCl) and half-strength Ringer’s (HSR) solution. Microstructural characterization was conducted using X-ray diffraction (XRD), optical microscopy, field-emission scanning electron microscopy (FESEM), and energy-dispersive X-ray spectroscopy (EDX). Electrochemical methods, including open-circuit potential (OCP), potentiodynamic polarization, and cyclic polarization, were employed to assess the corrosion behavior. The surface morphology and elemental composition were examined pre- and post-corrosion using FESEM and EDX techniques. Interestingly, the results demonstrated a significantly higher and more localized corrosion rate in the HSR solution than the uniform attack observed in the more aggressive HCl medium. Surface characterization via XRD, FESEM, and EDX identified Mg(OH)<sub>2</sub> as the primary corrosion product in both environments, with chloride compounds incorporated into the corrosion layer in Ringer's solution. These findings underscore the critical and complex role of the physiological environment in accelerating the degradation of magnesium, providing vital insights for the design of future Mg-based biodegradable implants.</p>

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Comparative corrosion behavior of sintered pure magnesium in HCl and half-strength Ringer’s solution

  • 期刊论文

  • 发表日期：

    2026年6月15日

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  • Mohammed Ibrahim Fathi,
  • Mohammed Ali Terres,
  • Jawdat Ali Yagoob

摘要

This study offers significant insights into the corrosion characteristics of pure magnesium (P Mg) produced using powder metallurgy (PM), relevant to both industrial and biomedical applications. Pure magnesium specimens were compressed at 650 MPa and sintered at 525°C for 30 min. The corrosion performance was assessed in two distinct corrosive environments: 0.25 M hydrochloric acid (HCl) and half-strength Ringer’s (HSR) solution. Microstructural characterization was conducted using X-ray diffraction (XRD), optical microscopy, field-emission scanning electron microscopy (FESEM), and energy-dispersive X-ray spectroscopy (EDX). Electrochemical methods, including open-circuit potential (OCP), potentiodynamic polarization, and cyclic polarization, were employed to assess the corrosion behavior. The surface morphology and elemental composition were examined pre- and post-corrosion using FESEM and EDX techniques. Interestingly, the results demonstrated a significantly higher and more localized corrosion rate in the HSR solution than the uniform attack observed in the more aggressive HCl medium. Surface characterization via XRD, FESEM, and EDX identified Mg(OH)2 as the primary corrosion product in both environments, with chloride compounds incorporated into the corrosion layer in Ringer's solution. These findings underscore the critical and complex role of the physiological environment in accelerating the degradation of magnesium, providing vital insights for the design of future Mg-based biodegradable implants.