Corrosion of bismuth-based superconductor wires by some atmospheric agents

Abstract

Superconducting wires (SWs) were previously prepared in our group by heat treatment of bismuth-based superconductor coatings on a metal core. This paper presents an analysis of the corrosion process by some atmospheric agents on the SWs. SWs with different concentrations of a (Bi, Pb)-2223 phase have been exposed to water vapour saturated air, to pure water vapour or to dry carbon dioxide. Each of these atmospheric agents was found to act differently on the SWs. However, all the studied corrosion processes present a high sensitivity to the concentration of the (Bi, Pb)-2223 phase. For a higher concentration of this phase, the SWs are less sensitive to atmospheric agents.

Microstructural surface changes of electrodeposited Pb on gas diffusion electrode during electroreduction of gas‐phase CO2

“…[3,10] Changes may include structural and crytalline forms, depending on the nature of agents the metals are exposed to. It has been reported that some metals may undergo structural changes when exposed to atmospheric agents [11] and different temperature conditions. [12,13] These structural changes or crystalline forms may therefore lead to differences in catalytic activity and stability during the desired processes.…”

The Electrochemical Corrosion Behaviour of compacted (Bi, Pb)-2223 superconductors in Aqueous Solutions

“…One important factor to consider in achieving such a goal is the rate of corrosion of these materials when placed in media with different pH. Several studies [8][9][10][11] have been conducted to investigate the electrochemical and corrosion behavior of Bi-Pb superconductors in various environments. P. Mun et al [12] performed studies on the effect of the uniaxial compacting pressure on the superconducting properties of the Bi-2223 samples.…”