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Yuki Kagawa,Kazuhiko Noda,Tadashi Shinohara,Hachiro Imai 한국표면공학회 2010 한국표면공학회 학술발표회 초록집 Vol.2010 No.11
Analysis of concentration of chloride ion in crevice corrosion was done on type 304 stainless steel by immersion of the specimen in 0.5 ㏖/l NaCl solutions and measured using galvanostatic measurement in occluded cell. The anodic reaction in crevice corrosion could be estimated as the changing the concentration of chloride ion by using occluded cell. The condense of the chloride ion was derived by keeping the neutrality in the crevice area. The results show that chloride ion concentrations in crevice during the crevice corrosion growth. This proves that the use of Ag / AgCl electrode can be applied for chloride ion measurement in crevice corrosion.
Degradation of Fuel Cell Characteristic in PEFC by Hydrogen Peroxide
Namsun Choi,Ayami Kameda,Shinji Kato,Tomohiro Tanabe,Kazuhiko Noda,Hachiro Imai 한국표면공학회 2010 한국표면공학회 학술발표회 초록집 Vol.2010 No.11
The hydrogen peroxide made by the reaction in a fuel cell may degrade the conductivity in polymer electrolyte fuel cells (PEFC) . The degradation behavior of solid polymer electrolyte membrane in PEFC is investigated by using membrane that was immersed into hydrogen peroxide solutions as sample for each measurement. The measurement of the proton diffusion rate in the membrane was performed for the proton conductivity measurement. The current-cell voltage curve measurement was performed for the investigation of a fuel cell performance. The measurement of proton diffusion rate of a solid polymer electrolyte membrane can be applied to evaluate conductivity in a fuel cell.