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

    Fingerprint

    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",
    issn = "0013-4651",
    number = "5",

    }

    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 -