Cost effective in-situ characterization of coatings for PEFC bipolar plates demonstrated with PVD deposited CrN

Sonja Auvinen (Corresponding Author), Thomas Tingelöf, Jari Ihonen, Jarmo Siivinen, Max Johansson

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

Abstract

The corrosion and contact resistances of coated and uncoated stainless steel grades were studied. The coatings studied were PVD CrN and arc discharge deposited Au. The samples were aged in long steady-state experiments using a multisinglecell device. MEAs and exhaust water were analyzed for accumulated iron after measurements. Iron accumulation was measured from MEAs, exhaust water and gas outlet pipes from the cells. The interfacial contact resistances were measured before and after the fuel cell experiments. Low contact resistance was achieved with all coated samples. The main accumulation site of dissolved iron was found to be the MEA and GDLs. A large variation in the corrosion results due to differences in the coating quality was observed. Some coatings with low interfacial contact resistance were found to be prone to corrosion. The CrN coating was also tested in a stack, and it performed well. It was concluded that the multisinglecell is a useful tool for screening different coatings reliably and cost-effectively.
Original languageEnglish
Pages (from-to)B550-B556
Number of pages7
JournalJournal of the Electrochemical Society
Volume158
Issue number5
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

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Physical vapor deposition
Contact resistance
contact resistance
costs
coatings
Coatings
Iron
Costs
iron
corrosion
Corrosion
Water
Stainless Steel
arc discharges
outlets
corrosion resistance
water
fuel cells
Corrosion resistance
Fuel cells

Keywords

  • PEM fuel cell
  • bipolar plate
  • stainless steel
  • coating

Cite this

@article{5b85b00c223f4d948487e0ea6076754a,
title = "Cost effective in-situ characterization of coatings for PEFC bipolar plates demonstrated with PVD deposited CrN",
abstract = "The corrosion and contact resistances of coated and uncoated stainless steel grades were studied. The coatings studied were PVD CrN and arc discharge deposited Au. The samples were aged in long steady-state experiments using a multisinglecell device. MEAs and exhaust water were analyzed for accumulated iron after measurements. Iron accumulation was measured from MEAs, exhaust water and gas outlet pipes from the cells. The interfacial contact resistances were measured before and after the fuel cell experiments. Low contact resistance was achieved with all coated samples. The main accumulation site of dissolved iron was found to be the MEA and GDLs. A large variation in the corrosion results due to differences in the coating quality was observed. Some coatings with low interfacial contact resistance were found to be prone to corrosion. The CrN coating was also tested in a stack, and it performed well. It was concluded that the multisinglecell is a useful tool for screening different coatings reliably and cost-effectively.",
keywords = "PEM fuel cell, bipolar plate, stainless steel, coating",
author = "Sonja Auvinen and Thomas Tingel{\"o}f and Jari Ihonen and Jarmo Siivinen and Max Johansson",
note = "Project code: 20868",
year = "2011",
doi = "10.1149/1.3562215",
language = "English",
volume = "158",
pages = "B550--B556",
journal = "Journal of the Electrochemical Society",
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Cost effective in-situ characterization of coatings for PEFC bipolar plates demonstrated with PVD deposited CrN. / Auvinen, Sonja (Corresponding Author); Tingelöf, Thomas; Ihonen, Jari; Siivinen, Jarmo; Johansson, Max.

In: Journal of the Electrochemical Society, Vol. 158, No. 5, 2011, p. B550-B556.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Cost effective in-situ characterization of coatings for PEFC bipolar plates demonstrated with PVD deposited CrN

AU - Auvinen, Sonja

AU - Tingelöf, Thomas

AU - Ihonen, Jari

AU - Siivinen, Jarmo

AU - Johansson, Max

N1 - Project code: 20868

PY - 2011

Y1 - 2011

N2 - The corrosion and contact resistances of coated and uncoated stainless steel grades were studied. The coatings studied were PVD CrN and arc discharge deposited Au. The samples were aged in long steady-state experiments using a multisinglecell device. MEAs and exhaust water were analyzed for accumulated iron after measurements. Iron accumulation was measured from MEAs, exhaust water and gas outlet pipes from the cells. The interfacial contact resistances were measured before and after the fuel cell experiments. Low contact resistance was achieved with all coated samples. The main accumulation site of dissolved iron was found to be the MEA and GDLs. A large variation in the corrosion results due to differences in the coating quality was observed. Some coatings with low interfacial contact resistance were found to be prone to corrosion. The CrN coating was also tested in a stack, and it performed well. It was concluded that the multisinglecell is a useful tool for screening different coatings reliably and cost-effectively.

AB - The corrosion and contact resistances of coated and uncoated stainless steel grades were studied. The coatings studied were PVD CrN and arc discharge deposited Au. The samples were aged in long steady-state experiments using a multisinglecell device. MEAs and exhaust water were analyzed for accumulated iron after measurements. Iron accumulation was measured from MEAs, exhaust water and gas outlet pipes from the cells. The interfacial contact resistances were measured before and after the fuel cell experiments. Low contact resistance was achieved with all coated samples. The main accumulation site of dissolved iron was found to be the MEA and GDLs. A large variation in the corrosion results due to differences in the coating quality was observed. Some coatings with low interfacial contact resistance were found to be prone to corrosion. The CrN coating was also tested in a stack, and it performed well. It was concluded that the multisinglecell is a useful tool for screening different coatings reliably and cost-effectively.

KW - PEM fuel cell

KW - bipolar plate

KW - stainless steel

KW - coating

U2 - 10.1149/1.3562215

DO - 10.1149/1.3562215

M3 - Article

VL - 158

SP - B550-B556

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 5

ER -