Evaluation of a Cr3C2(NiCr) Coating Deposited on s4400 by Means of an HVOF Process and Used for Flow Plates of PEM Fuel

In this research the electrochemical behavior of a Cr3C2(NiCr) coating deposited on S4400 through the use of an HVOF (high velocity oxygen-fuel) thermal spraying process was studied. The electrolyte used was a solution of H2SO4 0.5 M + 2 ppm Fˉ used at environment temperature. As a reference electro...

Full description

Saved in:
Bibliographic Details
Published in:International journal of electrochemical science 2012-02, Vol.7 (2), p.1079-1092
Main Authors: Rendón-Belmonte, M., Pérez-Quiroz, J.T., Terán-Guillén, J., Porcayo-Calderón, J., Torres-Acosta, A., Orozco-Gamboa, G.
Format: Article
Language:English
Subjects:
Coating
Corrosion
HVOF
PEM fuel
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this research the electrochemical behavior of a Cr3C2(NiCr) coating deposited on S4400 through the use of an HVOF (high velocity oxygen-fuel) thermal spraying process was studied. The electrolyte used was a solution of H2SO4 0.5 M + 2 ppm Fˉ used at environment temperature. As a reference electrode a mercurous sulfate (Hg2SO4) was used and a graphite bar as a counter electrode. The morphological aspect of the coating evaluated was analyzed by SEM (Scanning Electron Microscopy) before and after the electrochemical evaluation. The coating electrochemical values obtained for a period of 576 hrs fulfilled the corrosion resistance criteria required by USDOE (US Department of Energy). As a starting point, this coating could be considered in flow plates for PEM-based (Proton Exchange Membrane) fuel cells. Nevertheless, the loss of coating during this period may limit its application.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)13396-7