TY - GEN
T1 - Influence of hydrogen charging and oxidation solutions on the electrochemical measurement of hydrogen permeation in micro alloyed steel sheets
AU - Chen, Xiang
AU - De Sanctis, Massimo
AU - Valentini, Renzo
AU - Lovicu, Gianfranco
AU - Ishak, Randa
AU - Stubbins, James F.
PY - 2010
Y1 - 2010
N2 - In this study, efforts are dedicated to studying the influence of hydrogen charging and oxidation solutions on the electrochemical measurement of hydrogen permeation in microalloyed steel API X52. It was found that by incorporating 4×10-4 mol/L Pd(NO3)2 into 1M NaOH hydrogen oxidation solution, an in-situ Pd layer was able to be deposited onto the exit side surface of the sample membrane which eliminates the necessity of depositing an electrocatalytic Pd layer prior to the permeation experiments and has potential advantages for the industrial application because of the simplified process. In comparison with the case of using only 1M NaOH as the hydrogen oxidation solution, the hydrogen oxidation solution with in-situ Pd coating could oxidize hydrogen atoms more effectively and was able to yield reproducible hydrogen permeation current. In addition, the effect of combinations of different hydrogen recombination poisons, such as thiourea and NaAsO2, and various charging solutions, such as NaOH, H 2SO4and acetic acid and sodium acetate buffer solution, is discussed. In most cases, the acetic acid and sodium acetate buffer solution with thiourea yielded the best permeation results with repeatable peak hydrogen permeation curves.
AB - In this study, efforts are dedicated to studying the influence of hydrogen charging and oxidation solutions on the electrochemical measurement of hydrogen permeation in microalloyed steel API X52. It was found that by incorporating 4×10-4 mol/L Pd(NO3)2 into 1M NaOH hydrogen oxidation solution, an in-situ Pd layer was able to be deposited onto the exit side surface of the sample membrane which eliminates the necessity of depositing an electrocatalytic Pd layer prior to the permeation experiments and has potential advantages for the industrial application because of the simplified process. In comparison with the case of using only 1M NaOH as the hydrogen oxidation solution, the hydrogen oxidation solution with in-situ Pd coating could oxidize hydrogen atoms more effectively and was able to yield reproducible hydrogen permeation current. In addition, the effect of combinations of different hydrogen recombination poisons, such as thiourea and NaAsO2, and various charging solutions, such as NaOH, H 2SO4and acetic acid and sodium acetate buffer solution, is discussed. In most cases, the acetic acid and sodium acetate buffer solution with thiourea yielded the best permeation results with repeatable peak hydrogen permeation curves.
UR - http://www.scopus.com/inward/record.url?scp=78649346442&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:78649346442
SN - 9781617388460
T3 - 2nd International Topical Meeting on Safety and Technology of Nuclear Hydrogen Production, Control, and Management 2010
SP - 127
EP - 134
BT - 2nd International Topical Meeting on Safety and Technology of Nuclear Hydrogen Production, Control, and Management 2010
T2 - 2nd International Topical Meeting on Safety and Technology of Nuclear Hydrogen Production, Control, and Management 2010
Y2 - 13 June 2010 through 17 June 2010
ER -