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Development of Aluminium Base Anode for Cathodic Protection of Steel

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Abstract

Aluminum-iron activated with ore tailing alloy was developed as an anode for the protection of steel in a seawater environment using an impressed current cathodic protection mechanism. The materials used in this research were aluminum, iron ore tailings and low-carbon steel. The anode was produced via the sand-casting method by the addition of varying weight fractions of iron ore tailings (5–25%). The resulting anodes were characterized; the microstructure of the anodes was observed by scanning electron microscopy/energy dispersive spectroscopy, and X-ray diffraction was used to identify the phases present. The corrosion behavior of the anodes was determined in seawater with a salinity of 2.1% using a potentiostat. The micrograph results showed that some anodes had large grains, small grains and a mixture of unevenly distributed grains throughout the material. The energy dispersive spectroscopy spectrogram showed aluminum, oxygen and zinc to be the most prominent elements in the anodes. In addition, inclusions and several intermetallics were observed. Sample D (85 Al% + 15 IOT%) has a corrosion potential of -405.197 mV (silver/silver chloride) compared to steel, which has a corrosion potential of -637.653 mV (silver/silver chloride). Sample D has more positive potentials than steel, which means that sample D is the most suitable anode for protecting steel via impressed current system cathodic protection.

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All the data employed in support of the outcome of the study are included in this article.

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The authors received no funding from any source.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure, Ondo State, P.M.B. 704, Nigeria

    Daniel T. Oloruntoba & Babatunde O. Iwarere

  2. Department of Mechanical Engineering, Redeemer’s University, Ede, Osun State, Nigeria

    Olanrewaju S. Adesina & Olufemi O. Sanyaolu

  3. SDG 9, Industry, Innovation and Infrastructure, Redeemer’s University, Ede, Osun State, Nigeria

    Olanrewaju S. Adesina & Olufemi O. Sanyaolu

  4. Department of Mechanical Engineering, Landmark University, Omu-Aran, Kwara State, Nigeria

    Peter P. Ikubanni & Adeolu A. Adediran

Authors
  1. Daniel T. Oloruntoba
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  2. Olanrewaju S. Adesina
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  3. Olufemi O. Sanyaolu
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  4. Peter P. Ikubanni
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  5. Babatunde O. Iwarere
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  6. Adeolu A. Adediran
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Contributions

This work was carried out in collaboration between all authors. Authors: Daniel Toyin Oloruntoba, Olanrewaju Seun Adesina, Babatunde Iwarere designed the study, performed the experiment, interpreted results and wrote the first draft of the manuscript. Authors: Olanrewaju Seun Adesina, Olufemi Oluseun Sanyaolu, Peter Pelumi Ikubanni, and Adeolu Adesoji Adediran managed the analyses of the study, managed literature searches and graphical editing. All authors read and approved the final manuscript.

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Correspondence to Olanrewaju S. Adesina or Peter P. Ikubanni.

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Oloruntoba, D.T., Adesina, O.S., Sanyaolu, O.O. et al. Development of Aluminium Base Anode for Cathodic Protection of Steel. Chemistry Africa (2024). https://doi.org/10.1007/s42250-024-00962-x

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