EFFECT OF OXYGEN-CONTENT IN CARBON MATERIALS ON THE CORROSION RATE AND ITS SUPPRESSION BY FLUORINATION TREATMENT

Authors
MAEDA M HAGIWARA A SATO H ZHAO X MORIKAWA S
Citation
M. Maeda et al., EFFECT OF OXYGEN-CONTENT IN CARBON MATERIALS ON THE CORROSION RATE AND ITS SUPPRESSION BY FLUORINATION TREATMENT, Denki Kagaku Oyobi Kogyo Butsuri Kagaku, 66(10), 1998, pp. 1026-1031
Citations number
5
Categorie Soggetti
Electrochemistry
Journal title
Denki Kagaku Oyobi Kogyo Butsuri Kagaku → ACNP
ISSN journal
03669297
Volume
66
Issue
10
Year of publication
1998
Pages
1026 - 1031
Database
ISI
SICI code
0366-9297(1998)66:10<1026:EOOICM>2.0.ZU;2-V
Abstract
In order to improve the durability of phosphoric acid fuel cells (PAFC ), it is essential to suppress the corrosion rate of carbon, which is one of the important components. In this study, we examined the influe nce of oxygen content in carbon materials on their corrosion rate in h ot phosphoric acid. An increase of surface oxygen content was found to enhance the initial corrosion rate, while the steady corrosion rate i ncreased with the oxygen content in bulk. The substitution of reactive surface oxide sites with fluorine greatly reduced the corrosion rate.