Understanding the Apparently Poor Conductivity of Galvanized Steel Plates

This paper investigates the physical reasons for the apparently poor conductivity of galvanized steel plates (GSP), which has not yet received a proper explanation. Apparent conductivities as low as 0.1 MS/m were reported in the past, which are incongruously low compared to the DC conductivity of st...

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Autor principal:	Andrea Cozza
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Apparent conductivity galvanization iron-zinc compounds multi-layered structures reverberation chamber steel plate Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/ac95d41ce14b4e51a2b852b9897560c3
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spelling	oai:doaj.org-article:ac95d41ce14b4e51a2b852b9897560c32021-11-09T00:02:40ZUnderstanding the Apparently Poor Conductivity of Galvanized Steel Plates2169-353610.1109/ACCESS.2021.3123818https://doaj.org/article/ac95d41ce14b4e51a2b852b9897560c32021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9591598/https://doaj.org/toc/2169-3536This paper investigates the physical reasons for the apparently poor conductivity of galvanized steel plates (GSP), which has not yet received a proper explanation. Apparent conductivities as low as 0.1 MS/m were reported in the past, which are incongruously low compared to the DC conductivity of steels (4 to 8 MS/m), or zinc (16.7 MS/m), the most common coating agent used against corrosion in steel products. A comprehensive review of results from metallurgy and materials science is presented, providing insights about the multi-layered structure of zinc-based coatings. These are found to be made of a limited set of intermetallic zinc-iron compounds each characterized by a steeply decreasing conductivity as their iron percentage increases. Depending on the galvanization process the relative thickness of these layers can vary widely, explaining the seemingly random apparent conductivity of GSP. Theoretical modeling of these structures shows that their apparent conductivity scales linearly with the frequency, suggesting that it can be far lower than acknowledged so far. An extensive analysis of power-dissipation data from the literature of GSP-based reverberation chambers confirms these predictions, with multiple instances of apparent conductivities as low as 10 kS/m. The conclusion is not that GSP are hopelessly poorly conductive, but rather that care should be taken in selecting the right coating technology, not only based on corrosion protection and minimizing costs, but also in view of its impact on GSP conductivity.Andrea CozzaIEEEarticleApparent conductivitygalvanizationiron-zinc compoundsmulti-layered structuresreverberation chambersteel plateElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 146625-146639 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Apparent conductivity galvanization iron-zinc compounds multi-layered structures reverberation chamber steel plate Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Apparent conductivity galvanization iron-zinc compounds multi-layered structures reverberation chamber steel plate Electrical engineering. Electronics. Nuclear engineering TK1-9971 Andrea Cozza Understanding the Apparently Poor Conductivity of Galvanized Steel Plates
description	This paper investigates the physical reasons for the apparently poor conductivity of galvanized steel plates (GSP), which has not yet received a proper explanation. Apparent conductivities as low as 0.1 MS/m were reported in the past, which are incongruously low compared to the DC conductivity of steels (4 to 8 MS/m), or zinc (16.7 MS/m), the most common coating agent used against corrosion in steel products. A comprehensive review of results from metallurgy and materials science is presented, providing insights about the multi-layered structure of zinc-based coatings. These are found to be made of a limited set of intermetallic zinc-iron compounds each characterized by a steeply decreasing conductivity as their iron percentage increases. Depending on the galvanization process the relative thickness of these layers can vary widely, explaining the seemingly random apparent conductivity of GSP. Theoretical modeling of these structures shows that their apparent conductivity scales linearly with the frequency, suggesting that it can be far lower than acknowledged so far. An extensive analysis of power-dissipation data from the literature of GSP-based reverberation chambers confirms these predictions, with multiple instances of apparent conductivities as low as 10 kS/m. The conclusion is not that GSP are hopelessly poorly conductive, but rather that care should be taken in selecting the right coating technology, not only based on corrosion protection and minimizing costs, but also in view of its impact on GSP conductivity.
format	article
author	Andrea Cozza
author_facet	Andrea Cozza
author_sort	Andrea Cozza
title	Understanding the Apparently Poor Conductivity of Galvanized Steel Plates
title_short	Understanding the Apparently Poor Conductivity of Galvanized Steel Plates
title_full	Understanding the Apparently Poor Conductivity of Galvanized Steel Plates
title_fullStr	Understanding the Apparently Poor Conductivity of Galvanized Steel Plates
title_full_unstemmed	Understanding the Apparently Poor Conductivity of Galvanized Steel Plates
title_sort	understanding the apparently poor conductivity of galvanized steel plates
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/ac95d41ce14b4e51a2b852b9897560c3
work_keys_str_mv	AT andreacozza understandingtheapparentlypoorconductivityofgalvanizedsteelplates
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Understanding the Apparently Poor Conductivity of Galvanized Steel Plates

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