TY - JOUR
T1 - Ammonia mitigation and induction effects on hydrogen environment embrittlement of SCM440 low-alloy steel
AU - Zhang, Nan
AU - Komoda, Ryosuke
AU - Yamada, Kazuki
AU - Kubota, Masanobu
AU - Staykov, Aleksandar
N1 - Funding Information:
This study was supported by the World Premier International Research Center Initiative (WPI), MEXT , Japan. The International Institute for Carbon-Neutral Energy Research ( WPI-I2CNER ) is supported by the World Premier International Research Center Initiative (WPI), MEXT , Japan. Kyushu University platform of Inter-transdisciplinary Energy Research (Q-PIT), Japan.
Funding Information:
This study was supported by the World Premier International Research Center Initiative (WPI), MEXT, Japan. The International Institute for Carbon-Neutral Energy Research (WPI-I2CNER) is supported by the World Premier International Research Center Initiative (WPI), MEXT, Japan. Kyushu University platform of Inter-transdisciplinary Energy Research (Q-PIT), Japan.
Publisher Copyright:
© 2022 Hydrogen Energy Publications LLC
PY - 2022/4/19
Y1 - 2022/4/19
N2 - The effect of ammonia (NH3) contained in hydrogen (H2) gas on hydrogen environment embrittlement (HEE) of SCM440 low-alloy steel was studied in association with the NH3 concentration, loading rate, and gas pressure. NH3 worked as both mitigator of the HEE and inducer of hydrogen embrittlement (HE) depending on the testing conditions. The mitigation of the HEE was achieved by the deactivation of the iron (Fe) surface for H2 dissociation caused by the preferential adsorption of NH3 on the Fe surface, which is enhanced by the increase in the NH3 concentration and decrease in the H2 gas pressure. NH3 induced HE was caused due to creating hydrogen by the NH3 decomposition. Since the NH3 decomposition rate is low, the induction effect was observed when the loading rate was low. The effect of NH3 was determined by the competition of the mitigation and induction effects.
AB - The effect of ammonia (NH3) contained in hydrogen (H2) gas on hydrogen environment embrittlement (HEE) of SCM440 low-alloy steel was studied in association with the NH3 concentration, loading rate, and gas pressure. NH3 worked as both mitigator of the HEE and inducer of hydrogen embrittlement (HE) depending on the testing conditions. The mitigation of the HEE was achieved by the deactivation of the iron (Fe) surface for H2 dissociation caused by the preferential adsorption of NH3 on the Fe surface, which is enhanced by the increase in the NH3 concentration and decrease in the H2 gas pressure. NH3 induced HE was caused due to creating hydrogen by the NH3 decomposition. Since the NH3 decomposition rate is low, the induction effect was observed when the loading rate was low. The effect of NH3 was determined by the competition of the mitigation and induction effects.
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U2 - 10.1016/j.ijhydene.2022.03.006
DO - 10.1016/j.ijhydene.2022.03.006
M3 - Article
AN - SCOPUS:85127334346
SN - 0360-3199
VL - 47
SP - 15084
EP - 15093
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 33
ER -
