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Influence of nitrogen immersion and NiO nanoparticles on the electrochemical behavior of (Bi, Pb)-2223 superconductor in sodium sulfate solution

H.T. Rahal (Department of Chemistry, Beirut Arab University, Beirut, Lebanon)
A.M. Abdel-Gaber (Department of Chemistry, Beirut Arab University, Beirut, Lebanon)
R. Awad (Department of Physics, Beirut Arab University, Beirut, Lebanon)
B.A. Abdel-Naby (Department of Chemistry, Alexandria University, Alexandria, Egypt)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 17 July 2018

Issue publication date: 24 July 2018

154

Abstract

Purpose

The paper aims to examine the inhibition effect of NiO nanoparticles and the influence of liquid nitrogen immersion on the corrosion behavior of (NiO)x(Bi1.6 Pb0.4)Sr2Ca2Cu3O10-δ and (NiO)x (Bi, Pb 2223), where x = 0.00 and 0.05 Wt.% phase superconductor in 0.1 M Na2SO4 at 30°C.

Design/methodology/approach

This study was done using open-circuit potential electrochemical impedance spectroscopy, potentiodynamic polarization curves and chronoamperometry measurements.

Findings

Potentiodynamic polarization technique showed that NiO nanoparticles suppress both the anodic and cathodic parts of the polarization curves of (NiO)x(Bi, Pb)-2223 superconductor in 0.1 M Na2SO4 solution. A significant enhancement in the corrosion resistance of the prepared superconductors is observed on immersing them in liquid nitrogen. This is owing to the fact that immersion in liquid nitrogen increases the volume contraction of the superconductor matrix, causing the shrinkage of the pores and voids present in the samples and thus reducing the active surface area for the dissolution of (NiO)x(Bi, Pb)-2223 superconductor matrix.

Originality/value

This paper fulfills the need to investigate the corrosion behavior of superconductors and the influence of liquid nitrogen immersion on such behavior.

Keywords

Citation

Rahal, H.T., Abdel-Gaber, A.M., Awad, R. and Abdel-Naby, B.A. (2018), "Influence of nitrogen immersion and NiO nanoparticles on the electrochemical behavior of (Bi, Pb)-2223 superconductor in sodium sulfate solution", Anti-Corrosion Methods and Materials, Vol. 65 No. 4, pp. 430-435. https://doi.org/10.1108/ACMM-02-2018-1900

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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