Corrosion Behavior of Chromium Coated Zy-4 Cladding under CANDU Primary Circuit Conditions

The manuscript is focused on corrosion behavior of a Cr coating under CANada Deuterium Uranium(CANDU) primary circuit conditions. The Cr coating is obtained via the thermionic vacuum arc procedure on Zircaloy -4 cladding. The surface coating characterization was performed using metallographic analys...

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Autores principales:	Diana Diniasi, Florentina Golgovici, Alexandru Anghel, Manuela Fulger, Carmen Cristina Surdu-Bob, Ioana Demetrescu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	corrosion Zircaloy-4 Cr coating SEM XRD XPS Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/681cd22dae8a4133865959eb57d8c885
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spelling	oai:doaj.org-article:681cd22dae8a4133865959eb57d8c8852021-11-25T17:17:00ZCorrosion Behavior of Chromium Coated Zy-4 Cladding under CANDU Primary Circuit Conditions10.3390/coatings111114172079-6412https://doaj.org/article/681cd22dae8a4133865959eb57d8c8852021-11-01T00:00:00Zhttps://www.mdpi.com/2079-6412/11/11/1417https://doaj.org/toc/2079-6412The manuscript is focused on corrosion behavior of a Cr coating under CANada Deuterium Uranium(CANDU) primary circuit conditions. The Cr coating is obtained via the thermionic vacuum arc procedure on Zircaloy -4 cladding. The surface coating characterization was performed using metallographic analysis and scanning electron microscopy (SEM) with an energy dispersive spectra detector (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) investigations. The thickness of the Cr coating determined from SEM images is around 500 nm layers After the autoclaving period, the thickness of the samples increased in time slowly. The kinetic of oxidation established a logarithmic oxidation law. The corrosion tests for various autoclaving periods of time include electrochemical impedance spectroscopy (EIS) and potentiodynamic tests, permitting computing porosity and efficiency of protection. All surface investigations sustain electrochemical results and promote the Cr coating on Zircaloy-4 alloy autoclaved for 3024 h as the best corrosion resistance based on decrease in corrosion current density values simultaneously with the increase of the time spent in autoclave. A slow increase of Vickers micro hardness was observed as a function of the autoclaved period as well. The value reached for 3024 h being 219 Kgf/mm<sup>2</sup> compared with 210 Kgf/mm<sup>2</sup> value before autoclaving.Diana DiniasiFlorentina GolgoviciAlexandru AnghelManuela FulgerCarmen Cristina Surdu-BobIoana DemetrescuMDPI AGarticlecorrosionZircaloy-4Cr coatingSEMXRDXPSEngineering (General). Civil engineering (General)TA1-2040ENCoatings, Vol 11, Iss 1417, p 1417 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	corrosion Zircaloy-4 Cr coating SEM XRD XPS Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	corrosion Zircaloy-4 Cr coating SEM XRD XPS Engineering (General). Civil engineering (General) TA1-2040 Diana Diniasi Florentina Golgovici Alexandru Anghel Manuela Fulger Carmen Cristina Surdu-Bob Ioana Demetrescu Corrosion Behavior of Chromium Coated Zy-4 Cladding under CANDU Primary Circuit Conditions
description	The manuscript is focused on corrosion behavior of a Cr coating under CANada Deuterium Uranium(CANDU) primary circuit conditions. The Cr coating is obtained via the thermionic vacuum arc procedure on Zircaloy -4 cladding. The surface coating characterization was performed using metallographic analysis and scanning electron microscopy (SEM) with an energy dispersive spectra detector (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) investigations. The thickness of the Cr coating determined from SEM images is around 500 nm layers After the autoclaving period, the thickness of the samples increased in time slowly. The kinetic of oxidation established a logarithmic oxidation law. The corrosion tests for various autoclaving periods of time include electrochemical impedance spectroscopy (EIS) and potentiodynamic tests, permitting computing porosity and efficiency of protection. All surface investigations sustain electrochemical results and promote the Cr coating on Zircaloy-4 alloy autoclaved for 3024 h as the best corrosion resistance based on decrease in corrosion current density values simultaneously with the increase of the time spent in autoclave. A slow increase of Vickers micro hardness was observed as a function of the autoclaved period as well. The value reached for 3024 h being 219 Kgf/mm<sup>2</sup> compared with 210 Kgf/mm<sup>2</sup> value before autoclaving.
format	article
author	Diana Diniasi Florentina Golgovici Alexandru Anghel Manuela Fulger Carmen Cristina Surdu-Bob Ioana Demetrescu
author_facet	Diana Diniasi Florentina Golgovici Alexandru Anghel Manuela Fulger Carmen Cristina Surdu-Bob Ioana Demetrescu
author_sort	Diana Diniasi
title	Corrosion Behavior of Chromium Coated Zy-4 Cladding under CANDU Primary Circuit Conditions
title_short	Corrosion Behavior of Chromium Coated Zy-4 Cladding under CANDU Primary Circuit Conditions
title_full	Corrosion Behavior of Chromium Coated Zy-4 Cladding under CANDU Primary Circuit Conditions
title_fullStr	Corrosion Behavior of Chromium Coated Zy-4 Cladding under CANDU Primary Circuit Conditions
title_full_unstemmed	Corrosion Behavior of Chromium Coated Zy-4 Cladding under CANDU Primary Circuit Conditions
title_sort	corrosion behavior of chromium coated zy-4 cladding under candu primary circuit conditions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/681cd22dae8a4133865959eb57d8c885
work_keys_str_mv	AT dianadiniasi corrosionbehaviorofchromiumcoatedzy4claddingundercanduprimarycircuitconditions AT florentinagolgovici corrosionbehaviorofchromiumcoatedzy4claddingundercanduprimarycircuitconditions AT alexandruanghel corrosionbehaviorofchromiumcoatedzy4claddingundercanduprimarycircuitconditions AT manuelafulger corrosionbehaviorofchromiumcoatedzy4claddingundercanduprimarycircuitconditions AT carmencristinasurdubob corrosionbehaviorofchromiumcoatedzy4claddingundercanduprimarycircuitconditions AT ioanademetrescu corrosionbehaviorofchromiumcoatedzy4claddingundercanduprimarycircuitconditions
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Corrosion Behavior of Chromium Coated Zy-4 Cladding under CANDU Primary Circuit Conditions

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