Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras

Method for Formation of Nanostructures on Az-31 (Mg Alloy) and their uses thereof

Technology Category/Market

Category – Medical & Surgical/Advanced materials

Applications –Medical implants

Industry – Biomedical Engineering

Market -The global medical implants market size was valued at USD 90.24 billion in 2022 and is expected to reach US$ 173.41 billion by 2032, poised to grow at a CAGR of 6.8% during the forecast period 2023 to 2032.


Problem Statement

  • Mg alloys are commonly used as implant materials  where the mechanical properties of Mg alloys matches with the natural bone, reducing bone mismatch
  • But the currently used Mg–alloys are prone to corrosion and undergoes degradation thereby retarding the bone healing process


The present invention discloses a method for forming nanostructures on AZ-31 magnesium alloy  comprising:

  • Develop an anode material consisting of AZ-31 magnesium alloy with a composition of Mg-3Al-1Zn(wt.%)
  • Develop a cathode material made of platinum to serve as secondary electrode
  • Preparing a hybrid electrolyte by mixing Ti powder with hydrofluoric acid
  • Forming nanostructures on AZ-31 Mg-alloy substrates using the two-electrode electrochemical anodization cell

Key Features/Value Proposition

Technical Perspective:

  • Novel method to achieve nanostructures on Mg-alloy (AZ-31) for potential biomedical applications
  • Anodization, along with optimized electrochemical parameters can help in self-organized growth of nano-orous or nano tubular oxide layers in the material
  • Surface chemistry can be tailored and pore structure can be controlled; sample anodized at 40 V shows a porous structure with a diameter of ~60 and 80 nm, and height of the nanostructures is ~150 nm.

User Perspective:

  • Cost-effective, and can be fabricated on the surface of existing medical implants, mechanically rigid and chemically stable
  • Ability to control corrosion, and Mg degradation rate, high surface area, exceptional biocompatibility
Questions about this Technology?

Contact for Licensing

Research Lab

Prof. Tuhin Subhra Santra

Department of Engineering Design

Intellectual Property

  • IITM IDF Ref. 1973
  • IN416705-Granted

Technology Readiness Level


 Experimental Proof of Concept 

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