Hydrogen embrittlement of amorphous alloys based on iron and nickel |
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| Affiliation: | 1. Israel Atomic Energy Commission, P.O. Box 7061, Tel Aviv 61070, Israel;2. Nuclear Research Center Negev, P.O. Box 9001, Beer-Sheva 84190, Israel;1. Max Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany;2. Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany;1. Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India;2. Academy of Technology, Hooghly 712121, India;3. National Institute of Technology Sikkim, South Sikkim 737139, India;4. SRM Institute of Science and Technology, Kattankulathur, Kanchipuram Dist 603203, India;1. School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China;2. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, PR China;3. School of Aeronautics and Astronautics, Sichuan University, Chengdu, Sichuan 610065, PR China;1. Department of Engineering, Faculty of Engineering Science and Technology, The Maldives National University, Rahdhebai Higun, Machangolhi, Male 20371, Maldives;2. Department of Mechanical Engineering, St. Peter’s Institute of Higher Education and Research, Chennai 600054, Tamil Nadu, India;3. Department of Mechanical Engineering, Saveetha School of Engineering, SIMATS, Saveetha Nagar, Thandalam, Chennai 602105, Tamil Nadu, India |
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| Abstract: | Hydrogen embrittlement of amorphous alloys based on iron and nickel was examined in constant extension rate tests during cathodic polarization. Tests were carried out at a current density of 50 A·m?2 in 0.1 M H2SO4 with and without addition of NaAsO2 and NaCl. Hydrogen permeation and polarization curves were measured. Differences in the degree of hydrogen embrittlement were ascribed mainly to differences in the entry of hydrogen into the alloys. It was suggested that a low degree of embrittlement resulted largely from a hindrance of hydrogen entry. For alloys containing phosphorus, this might be associated with phosphorus-containing oxyanions and salts. For the alloy with higher silicon content it may be associated with the formation of oxides of silicon. |
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