Corrosion studies on Fe-based amorphous alloys in simulated PEM fuel cell environment

Jayaraj, J.; Kim, Y.C.; Kim, K.B.; Seok, Hyun‐Kwang; Fleury, Éric

doi:10.1016/j.stam.2005.02.019

Cited by 63 publications

(33 citation statements)

References 21 publications

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“…Various materials and coating techniques were utilized to avert corrosion of these plates including ferritic stainless steel (AISI446) [258]; metallic amorphous alloys (Fe 50 Cr 18 Mo 8 AL 2 C 14 B 6 ) [312]; sulfuric acids (H2SO4) [256]; TiN coating by multi-arc ion plating [313]; stainless steel alloys (Fe-20Cr-4V)…”

Section: Corrosionmentioning

confidence: 99%

Degradation aspects of water formation and transport in Proton Exchange Membrane Fuel Cell: A review

Ous

Arcoumanis

2013

Journal of Power Sources

132

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link AbstractThis review paper summarises the key aspects of Proton Exchange Membrane Fuel Cell (PEMFC) degradation that are associated with water formation, retention, accumulation, and transport mechanisms within the cell. Issues related to loss of active surface area of the catalyst, ionomer dissolution, membrane swelling, ice formation, corrosion, and contamination are also addressed and discussed. The impact of each of these water mechanisms on cell performance and durability was found to be different and to vary according to the design of the cell and its operating conditions. For example, the presence of liquid water within Membrane Electrode Assembly (MEA), as a result of water accumulation, can be detrimental if the operating temperature of the cell drops to sub-freezing.The volume expansion of liquid water due to ice formation can damage the morphology of different parts of the cell and may shorten its life-time. This can be more serious, for example, during the water transport mechanism where migration of Pt particles from the catalyst may take place after detachment from the carbon support. Furthermore, the effect of transport mechanism could be augmented if humid reactant gases containing impurities poison the membrane, leading to the same outcome as water retention or accumulation.Overall, the impact of water mechanisms can be classified as aging or catastrophic. Aging has a longterm impact over the duration of the PEMFC life-time whereas in the catastrophic mechanism the impact is immediate. The conversion of cell residual water into ice at sub-freezing temperatures by the water retention/ accumulation mechanism and the access of poisoning contaminants through the water transport mechanism are considered to fall into the catastrophic category. The effect of water mechanisms on PEMFC degradation can be reduced or even eliminated by (a) using advanced materials for improving the electrical, chemical and mechanical stability of the cell components against deterioration, and (b) implementing effective strategies for water management in the cell.

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Section: Corrosionmentioning

confidence: 99%

Degradation aspects of water formation and transport in Proton Exchange Membrane Fuel Cell: A review

Ous

Arcoumanis

2013

Journal of Power Sources

132

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“…Since they do not have grain boundaries, segregates or crystalline defects which may act as corrosion initiation sites, amorphous alloys are expected to have better corrosion resistance than their metallic constituents [8] .…”

Section: Effect Of Cobalt On the Corrosion Behaviour Of Amorphous Fe-mentioning

confidence: 99%

“…In 1974, Naka, Hashimoto and Masumoto brought into evidence both the corrosion resistance and the inertness in various aqueous electrolytes [1][2][3][4][5][6] . It is believed that all sources of localized corrosion disappear in the absence of common structural defects such as the grain boundaries, dislocations and segregations [7][8][9][10] . Structure, chemical composition and material homogeneity are the factors influencing the electrochemical behaviourr of amorphous alloys.…”

Section: Introductionmentioning

confidence: 99%

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Effect of cobalt on the corrosion behaviour of amorphous Fe-Co- Cr-B-Si alloys in dilute mineral acids

Solomon

2010

REVMETAL

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The aim of this paper was to investigate the effect of increasing cobalt content on the corrosion resistance of the FeCo-Cr-B-Si alloys in dilute mineral acids. The corrosion rates in 0.5N HCl, 1N HCl and 1N H 2 SO 4 significantly decrease with an increase in cobalt content. The alloys with a larger amount of cobalt can passivate spontaneously. The high corrosion resistance of the Fe-Co-Cr-B-Si alloys is also due to the formation of chromium -enriched passive film. Generally, the corrosion resistance of chromium -bearing alloy is improved by alloying with various metalloids but it is lowered by addition of boron and silicon. The corrosion behaviour of the amorphous Fe 75-x Co x Cr 1 B 7 Si 17 alloys obtained by the melt-spinning technique was studied using gravimetric method. The best results were obtained with Fe 65 Co 10 Cr 1 B 7 Si 17 alloy. The studied amorphous alloy ribbons exhibit not only excellent physical properties which are useful for many electric and magnetic applications: magnetic sensors, power transformers, high frequency transformers, etc., but also a very good corrosion resistance which extend their application domain. KeywordsAmorphous alloy; Corrosion; X-Ray diffraction; Alloying element; Passivation; Metalloid. Efecto del cobalto en el comportamiento de la corrosión de aleaciones amorfas Fe-Co-Cr-B-Si en ácidos minerales diluidos ResumenEste trabajo presenta los resultados de la investigación sobre la resistencia a la corrosión de un nuevo sistema de aleaciones amorfas, p. ej., Fe-Co-Cr-B-Si. El comportamiento de la corrosión de aleaciones amorfas así como el de cualquier otra aleación cristalina puede ser determinado, en ambas, por factores internos (la estructura y composición de la aleación) y por factores externos (tipo medio agresivo, concentración y coeficiente pH). La falta de cristalinidad y de defectos específicos al estado de cristalinidad -limitaciones de grano, dislocaciones y segregaciones-aseguran una alta resistencia a la corrosión a las aleaciones amorfas, en lugar de ser termodinámicamente metaestables La investigación se desarrolló a través del método gravimétrico en muestras de aleación amorfa Fe 75-x Co x Cr 1 B 7 Si 17 obtenidos por la técnica de centrifugado. Esta investigación muestra la influencia de la composición química de la aleación, por ejemplo, el porcentaje de cobalto y el medio de trabajo 0,5N HCl, 1N HCl y 1N H 2 SO 4 en la resistencia a la corrosión. Los mejores resultados fueron obtenidos con Fe 65 Co 10 Cr 1 B 7 Si 17.

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“…The published durability test methods include: (i) open circuit potential measurements [7][8][9][10][11][12][13][14][15], (ii) potentiostatic polarisation [7][8][9][10][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30], (iii) polarisation resistance [27,31,32], (iv) linear-sweep voltammetry [7,33,34], (v) I-V and I-P curves and life time tests in fuel-cell *Address correspondence to this author at the Dipartimento di Ingegneria dell'Innovazione, Università del Salento, via Monteroni, 73100 Lecce, Italy; Tel: +39 0832297621, +39 0832297290; E-mail: benedetto.bozzini@unisalento.it assemblies [24,[35][36][37]. These electrochemical tests have been accompanied by compositional and structural measurements: for relevant details, refer to [2].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Performance of Austenitic Stainless Steel Bipolar Plates for Nafion- and Room-Temperature Ionic-Liquid-Based PEMFCs

Mele¹,

Bozzini

2012

TOEFJ

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Abstract:In this paper we study the corrosion of AISI 304 austenitic stainless steel PEMFC bipolar plates in aqueous and room-temperature ionic-liquid electrolytes. The anodic potential thresholds and dynamics have been investigated by electrochemical (potentiodynamic and potentiostatic) and in situ spectroelectrochemical methods (visible electroreflectance and VIS-UV spectroellipsometry). We measured the values of damage potentials and we followed the time evolution of corrosion current and reflectivity above and below the pitting potential, obtaining an accurate characterisation of the surface conditions under oxidative attack. The ability of AISI 304 to repassivate in Cl -containing aqueous solution as well as the amount of residual surface damage have been assessed quantitatively by following electrode reflectivity under applied potential. Outstanding inertness of AISI 304 in [BMP][TFSA] was proved. The results of this work show that low-cost AISI 304 is a promising interconnect material for both Nafion-and RTIL-based PEMFCs.

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Corrosion studies on Fe-based amorphous alloys in simulated PEM fuel cell environment

Cited by 63 publications

References 21 publications

Degradation aspects of water formation and transport in Proton Exchange Membrane Fuel Cell: A review

Degradation aspects of water formation and transport in Proton Exchange Membrane Fuel Cell: A review

Effect of cobalt on the corrosion behaviour of amorphous Fe-Co- Cr-B-Si alloys in dilute mineral acids

Corrosion Performance of Austenitic Stainless Steel Bipolar Plates for Nafion- and Room-Temperature Ionic-Liquid-Based PEMFCs

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