Electrochemical Nitridation of a Stainless Steel for PEMFC Bipolar Plates

Heli Wang; John A. Turner

doi:10.1016/j.ijhydene.2011.07.045

Electrochemical Nitridation of a Stainless Steel for PEMFC Bipolar Plates

Heli Wang, John A. Turner

Chemistry and Nanoscience

National Renewable Energy Laboratory

Research output: Contribution to journal › Article › peer-review

38 Scopus Citations

Abstract

AISI446 steel has been electrochemically nitrided in 0.1 M HNO₃ + 0.5 M KNO₃ solution at room temperature. XPS analysis revealed surface NH₃ and a deeper nitride layer. The surface layer of the stainless steel modified by electrochemical nitridation was thus composed of a nitrogen-incorporated oxide film. The nitrided steel showed very low interfacial contact resistance (ca. 18 m cm² at 140 N/cm²) and excellent corrosion resistance in simulated PEMFC environments. Electrochemical nitridation provides an economic way to modify the stainless steel's surface, and is very promising for application to fuel cell bipolar plates.

Original language	American English
Pages (from-to)	13008-13013
Number of pages	6
Journal	International Journal of Hydrogen Energy
Volume	36
Issue number	20
DOIs	https://doi.org/10.1016/j.ijhydene.2011.07.045 https://doi.org/10.1016/j.ijhydene.2011.07.045
State	Published - Oct 2011

NREL Publication Number

NREL/JA-5600-51213

Keywords

Bipolar plate
Nitridation
PEMFC
Stainless steel
Surface modification
XPS

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Electrochemical Nitridation of a Stainless Steel for PEMFC Bipolar Plates",

abstract = "AISI446 steel has been electrochemically nitrided in 0.1 M HNO3 + 0.5 M KNO3 solution at room temperature. XPS analysis revealed surface NH3 and a deeper nitride layer. The surface layer of the stainless steel modified by electrochemical nitridation was thus composed of a nitrogen-incorporated oxide film. The nitrided steel showed very low interfacial contact resistance (ca. 18 m cm2 at 140 N/cm2) and excellent corrosion resistance in simulated PEMFC environments. Electrochemical nitridation provides an economic way to modify the stainless steel's surface, and is very promising for application to fuel cell bipolar plates.",

keywords = "Bipolar plate, Nitridation, PEMFC, Stainless steel, Surface modification, XPS",

author = "Heli Wang and Turner, {John A.}",

year = "2011",

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doi = "10.1016/j.ijhydene.2011.07.045",

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volume = "36",

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journal = "International Journal of Hydrogen Energy",

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T1 - Electrochemical Nitridation of a Stainless Steel for PEMFC Bipolar Plates

AU - Wang, Heli

AU - Turner, John A.

PY - 2011/10

Y1 - 2011/10

N2 - AISI446 steel has been electrochemically nitrided in 0.1 M HNO3 + 0.5 M KNO3 solution at room temperature. XPS analysis revealed surface NH3 and a deeper nitride layer. The surface layer of the stainless steel modified by electrochemical nitridation was thus composed of a nitrogen-incorporated oxide film. The nitrided steel showed very low interfacial contact resistance (ca. 18 m cm2 at 140 N/cm2) and excellent corrosion resistance in simulated PEMFC environments. Electrochemical nitridation provides an economic way to modify the stainless steel's surface, and is very promising for application to fuel cell bipolar plates.

AB - AISI446 steel has been electrochemically nitrided in 0.1 M HNO3 + 0.5 M KNO3 solution at room temperature. XPS analysis revealed surface NH3 and a deeper nitride layer. The surface layer of the stainless steel modified by electrochemical nitridation was thus composed of a nitrogen-incorporated oxide film. The nitrided steel showed very low interfacial contact resistance (ca. 18 m cm2 at 140 N/cm2) and excellent corrosion resistance in simulated PEMFC environments. Electrochemical nitridation provides an economic way to modify the stainless steel's surface, and is very promising for application to fuel cell bipolar plates.

KW - Bipolar plate

KW - Nitridation

KW - PEMFC

KW - Stainless steel

KW - Surface modification

KW - XPS

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DO - 10.1016/j.ijhydene.2011.07.045

M3 - Article

AN - SCOPUS:80052951951

SN - 0360-3199

VL - 36

SP - 13008

EP - 13013

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 20

ER -

Electrochemical Nitridation of a Stainless Steel for PEMFC Bipolar Plates

Abstract

NREL Publication Number

Keywords

UN SDGs

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