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Microbial Corrosion01:24

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Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...

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Surface Coatings on Biomedical Magnesium Alloys.

Jiapeng Ren1, Zhenyu Zhao1, Hua Li2

  • 1Intelligent Manufacturing and Equipment School, Shenzhen Institute of Information Technology, Shenzhen 518000, China.

Materials (Basel, Switzerland)
|July 30, 2025
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Summary

Magnesium alloys show promise for biomedical uses but degrade quickly. Surface coatings can protect these metallic biomaterials from bodily fluids, improving their clinical application.

Keywords:
biodegradable materialscoatingscorrosionmagnesium alloyssurface modification

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Area of Science:

  • Biomaterials Science
  • Materials Engineering
  • Surface Chemistry

Background:

  • Magnesium (Mg) alloys offer biocompatibility and degradability for biomedical implants.
  • Degradation issues like corrosion and wear limit Mg alloy clinical use.
  • Surface coatings are crucial for protecting Mg alloys in physiological environments.

Purpose of the Study:

  • To systematically review Mg alloy degradation mechanisms in vivo and in vitro.
  • To present advances in surface modification coatings for Mg alloys.
  • To analyze interactions between coatings and biological environments.

Main Methods:

  • Literature review of degradation mechanisms.
  • Analysis of recent surface modification techniques.
  • Examination of coating-electrolyte interactions.
  • Focus on conversion coatings' formation and behavior.

Main Results:

  • Mg alloys degrade via complex physiological interactions.
  • Surface coatings effectively mitigate direct contact with corrosive media.
  • Conversion coatings show specific formation, structural, and fracture characteristics.

Conclusions:

  • Surface modification is key to overcoming Mg alloy degradation.
  • Further research is needed to enhance clinical applicability.
  • Optimizing coatings will unlock the full potential of Mg alloys as biomaterials.