Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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Materials Map under construction

The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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Umoren, Peace S.

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (3/3 displayed)

  • 2024In-situ biosynthesized plant exudate gums‑silver nanocomposites as corrosion inhibitors for mild steel in hydrochloric acid medium17citations
  • 2023Assessment of Berlinia grandiflora and cashew natural exudate gums as sustainable corrosion inhibitors for mild steel in an acidic environment7citations
  • 2022Corrosion Inhibition Evaluation of Chitosan–CuO Nanocomposite for Carbon Steel in 5% HCl Solution and Effect of KI Addition26citations

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Timothy, Ukeme J.
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Lim, Ren Chong
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Mamudu, Ukashat
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Igwe, Isaac O.
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Anyanwu, Placid I.
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Aharanwa, Bibiana C.
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Uchechukwu, Theresa O.
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Umoren, Saviour A.
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Ankah, Nestor K.
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Kavaz, Doga
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Co-Authors (by relevance)

  • Timothy, Ukeme J.
  • Lim, Ren Chong
  • Mamudu, Ukashat
  • Igwe, Isaac O.
  • Anyanwu, Placid I.
  • Aharanwa, Bibiana C.
  • Uchechukwu, Theresa O.
  • Umoren, Saviour A.
  • Ankah, Nestor K.
  • Kavaz, Doga
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article

Corrosion Inhibition Evaluation of Chitosan–CuO Nanocomposite for Carbon Steel in 5% HCl Solution and Effect of KI Addition

  • Umoren, Peace S.
  • Umoren, Saviour A.
  • Kavaz, Doga
Abstract

<jats:p>Chitosan–copper oxide (CHT–CuO) nanocomposite was made by an in-situ method utilizing olive leaf extract (OLE) as reductant. The OLE mediated CHT–CuO nanocomposite containing varying amount of chitosan (0.5, 1.0 and 2.0 g) was evaluated as corrosion inhibitor for X60 carbon steel in 5 wt% hydrochloric acid solution. The corrosion inhibitive performance was assessed utilizing weight loss and electrochemical impedance spectroscopy, linear polarization resistance and potentiodynamic polarization techniques complemented with surface assessment of the corroded X60 carbon steel without and with the additives using scanning electron microscopy/energy dispersive X-ray spectroscopy and 3D optical profilometer. The effect of KI addition on the corrosion protection capacity of the nanocomposites was also examined. Corrosion inhibitive effect was observed to increase with increase in the nanocomposites dosage with the highest inhibition efficiency (IE) achieved at the optimum dosage of 0.5%. The order of corrosion inhibition performance followed the trend CHT1.0–CuO (90.35%) &gt; CHT0.5–CuO (90.16%) &gt; CHT2.0–CuO (89.52%) nanocomposite from impedance measurements. Also, IE was found to increase as the temperature was raised from 25 to 40 °C and afterwards a decline in IE was observed with further increase in temperature to 50 and 60 °C. The potentiodynamic polarization results suggest that the nanocomposites alone and in combination with KI inhibited the corrosion of X60 carbon steel by an active site blocking mechanism. Addition of KI upgrades the IE of the nanocomposites but is not attributable to synergistic influence. The lack of synergistic influence was confirmed from the computed synergism parameter (S1) which was found to be less than unity with values of 0.89, 0.74 and 0.75 for CHT0.5–CuO, CHT1.0–CuO and CHT2.0–CuO nanocomposites, respectively, at 60 °C. Furthermore, KI addition improved the IE with rise in temperature from 25 to 60 °C. Surface analysis results confirm the formation of a protective film which could be attributed to the adsorption of the nanocomposites on the carbon steel surface.</jats:p>

Topics
  • nanocomposite
  • impedance spectroscopy
  • surface
  • Carbon
  • corrosion
  • scanning electron microscopy
  • laser emission spectroscopy
  • steel
  • copper
  • X-ray spectroscopy