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Electrochemical Evaluation of Protective Coatings with Ti Additions on Mild Steel Substrate with Potential Application for PEM Fuel Cells

In this work, the corrosion behavior of NiCr(Ti) protective coatings deposited on mild steel substrates through laser cladding technology is studied as an alternative new material for metallic bipolar plates used in PEMFC applications. For electrochemical testing, a solution consisting of 0.5 M H(2)...

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Autores principales: Avram, Diana N., Davidescu, Corneliu M., Dan, Mircea L., Mirza-Rosca, Julia C., Hulka, Iosif, Pascu, Alexandru, Stanciu, Elena M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9369684/
https://www.ncbi.nlm.nih.gov/pubmed/35955302
http://dx.doi.org/10.3390/ma15155364
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author Avram, Diana N.
Davidescu, Corneliu M.
Dan, Mircea L.
Mirza-Rosca, Julia C.
Hulka, Iosif
Pascu, Alexandru
Stanciu, Elena M.
author_facet Avram, Diana N.
Davidescu, Corneliu M.
Dan, Mircea L.
Mirza-Rosca, Julia C.
Hulka, Iosif
Pascu, Alexandru
Stanciu, Elena M.
author_sort Avram, Diana N.
collection PubMed
description In this work, the corrosion behavior of NiCr(Ti) protective coatings deposited on mild steel substrates through laser cladding technology is studied as an alternative new material for metallic bipolar plates used in PEMFC applications. For electrochemical testing, a solution consisting of 0.5 M H(2)SO(4) + 2 ppm F(−) at room temperature is used as an electrolyte. The fluoride ions are added to simulate the conditions in the PEM fuel cell due to degradation of the proton exchange membrane and fluoride release. A saturated calomel electrode (SCE) is used as a reference electrode and a platinum mesh as the counter electrode. Scanning electron microscopy (SEM) and optical microscopy (OM) are used for studying the morphology of the protective coatings and the effect of Ti addition. The electrochemical evaluation consisted of measuring the open circuit potential (OCP), followed by electrochemical impedance spectroscopy measurements (EIS) and potentiodynamic polarization. It is found that the coatings with 5% Ti, 7% Ti and 10% Ti addition comply with the conditions of the US DOE regarding corrosion performance to be used as materials for the manufacture of the bipolar plates.
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spelling pubmed-93696842022-08-12 Electrochemical Evaluation of Protective Coatings with Ti Additions on Mild Steel Substrate with Potential Application for PEM Fuel Cells Avram, Diana N. Davidescu, Corneliu M. Dan, Mircea L. Mirza-Rosca, Julia C. Hulka, Iosif Pascu, Alexandru Stanciu, Elena M. Materials (Basel) Article In this work, the corrosion behavior of NiCr(Ti) protective coatings deposited on mild steel substrates through laser cladding technology is studied as an alternative new material for metallic bipolar plates used in PEMFC applications. For electrochemical testing, a solution consisting of 0.5 M H(2)SO(4) + 2 ppm F(−) at room temperature is used as an electrolyte. The fluoride ions are added to simulate the conditions in the PEM fuel cell due to degradation of the proton exchange membrane and fluoride release. A saturated calomel electrode (SCE) is used as a reference electrode and a platinum mesh as the counter electrode. Scanning electron microscopy (SEM) and optical microscopy (OM) are used for studying the morphology of the protective coatings and the effect of Ti addition. The electrochemical evaluation consisted of measuring the open circuit potential (OCP), followed by electrochemical impedance spectroscopy measurements (EIS) and potentiodynamic polarization. It is found that the coatings with 5% Ti, 7% Ti and 10% Ti addition comply with the conditions of the US DOE regarding corrosion performance to be used as materials for the manufacture of the bipolar plates. MDPI 2022-08-04 /pmc/articles/PMC9369684/ /pubmed/35955302 http://dx.doi.org/10.3390/ma15155364 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Avram, Diana N.
Davidescu, Corneliu M.
Dan, Mircea L.
Mirza-Rosca, Julia C.
Hulka, Iosif
Pascu, Alexandru
Stanciu, Elena M.
Electrochemical Evaluation of Protective Coatings with Ti Additions on Mild Steel Substrate with Potential Application for PEM Fuel Cells
title Electrochemical Evaluation of Protective Coatings with Ti Additions on Mild Steel Substrate with Potential Application for PEM Fuel Cells
title_full Electrochemical Evaluation of Protective Coatings with Ti Additions on Mild Steel Substrate with Potential Application for PEM Fuel Cells
title_fullStr Electrochemical Evaluation of Protective Coatings with Ti Additions on Mild Steel Substrate with Potential Application for PEM Fuel Cells
title_full_unstemmed Electrochemical Evaluation of Protective Coatings with Ti Additions on Mild Steel Substrate with Potential Application for PEM Fuel Cells
title_short Electrochemical Evaluation of Protective Coatings with Ti Additions on Mild Steel Substrate with Potential Application for PEM Fuel Cells
title_sort electrochemical evaluation of protective coatings with ti additions on mild steel substrate with potential application for pem fuel cells
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9369684/
https://www.ncbi.nlm.nih.gov/pubmed/35955302
http://dx.doi.org/10.3390/ma15155364
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