The President of the Northern Technical University attends part of the discussion of the diploma thesis, which discusses “the possibility of improving the resistance to biological corrosion”

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2022-06-23
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The President of the Northern Technical University attends part of the discussion of the diploma thesis, which discusses “the possibility of improving the resistance to biological corrosion”

In support of the postgraduate students, the President of the Northern Technical University, Prof. Dr. Alia Abbas Ali Al-Attar, the Scientific Assistant, the Assistant Professor Dr. Omar Rafeh Mahmoud, and the Administrative Assistant, Prof. Dr. Thanoun Younis Thanon, attended part of the discussion that took place for the higher diploma research project at the College of Engineering Technology / Mosul, specializing Power Mechanics Engineering Techniques tagged “Improving the Bio-Corrosion Resistance by Nano-Coating Thin Film for Medical Application”, as the study presented by the student Ahmed Mahmoud Jassim Al-Khalidi and under the supervision of Prof. Resistance) of Stainless Steel 316 L alloy used in medical applications by employing nanotechnology techniques – nanocoating of nanoparticles composed of titanium (Ti), aluminum (Al) and zinc (Zn). Deposition in the form of thin films using Glow Discharge Plasma technology, And then heat-treated in isolated ideal conditions to turn into its oxides consisting of:

  • Titanium oxide (TiO2 thin film) with a thickness of (65 nm), aluminum oxide (Al2O3 thin film) with a thickness of (105 nm), and zinc oxide (ZnO thin film) with a thickness of 189 nm.
  • The practical aspect of the research project included conducting tests with the latest nanotechnology devices, including:
  • X-ray diffraction machine (XRD)
  • Field emission microscope (FESEM)
  • And (Spectroscopic Reflectometer – SR) spectrophotometer for measuring the thickness of thin films.
  • Energy-dispersive X-ray machine (EDX)
  • To check thin-film elements

And a (Potentiostat) for conducting bio-corrosion examination using (Electrochemical Corrosion Test) on coated and uncoated samples in solutions similar to (Synthesized simulated body fluid-SBF)

Where (Open circuit potential-OCP) was carried out to check the open-circuit voltage and polarization diagram (Tafel curve).

The results obtained from (XRD) showed that the phases of the deposited oxides matched the standard X-ray diffraction index for each thin film. It was also shown from the results of the field emission microscopy (FESEM) that oxide layers of varying sizes were nano-sized according to the oxide layer, as well as a discrepancy in the elements The percentage of oxides measured by energy dispersive X-ray analysis (EDX) was the lowest percentage for the titanium oxide membrane, followed by the aluminum oxide membrane, and finally the zinc oxide membrane. The results also showed a significant improvement in the corrosion rate with the change of the precipitate and with the increase in the thickness of the nano-coating layer compared to the corrosion rate for uncoated stainless steel.

The study concluded the possibility of protecting medical materials (Biomaterials) from bio-corrosion by (Nanocoating thin films) technology using (Nanocoating thin films) nano-coatings for thin films with an improvement in the protection efficiency up to (92.04%) for the ZnO thin film with a thickness of (92.04%). 189 nm). The discussion committee consisted of:

  • Assistant Professor Dr. Maged Khalil Najm / Chairman
    • Assistant Professor Dr. Imad Touma Bani / Member
    • Prof. Dr. Haitham Muhammad Wadallah / member and supervisor

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