수소연료전지 자동차의 수소밸브용 알루미늄 합금의 저변형율인장실험에 의한 수소취화특성 연구

• Published in: Corrosion science and technology Vol. 21; no. 6; pp. 503 - 513
• Main Authors: 황현규, Hyun-kyu Hwang, 신동호, Dong-ho Shin, 김성종, Seong-jong Kim
• Format: Journal Article
• Language: Korean
• Published: 한국부식방식학회 31.12.2022
• Subjects: Aluminum alloy; Cathodic polarization experiment; Hydrogen embrittlement; Hydrogen valve; SSRT; SSRT; Hydrogen embrittlement; Cathodic polarization experiment; Hydrogen valve; Aluminum alloy
• ISSN: 1598-6462

As part of eco-friendly policies, interest in hydrogen vehicles is growing in the automotive industry to reduce carbon emissions. In particular, it is necessary to investigate the application of aluminum alloy for light weight hydrogen valves among hydrogen supply systems to improve the fuel efficiency of hydrogen vehicles. In this research, we investigated mechanical characteristics of aluminum alloys after hydrogen embrittlement considering the operating environment of hydrogen valves. In this investigation, experiments were conducted with strain rate, applied voltage, and hydrogen embrittlement time as variables that could affect hydrogen embrittlement. As a result, a brittle behavior was depicted when the strain rate was increased. A strain rate of 0.05 mm/min was selected for hydrogen embrittlement research because it had the greatest effect on fracture time. In addition, when the applied voltage and hydrogen embrittlement time were 5 V and 96 hours, respectively, mechanical characteristics presented dramatic decreases due to hydrogen embrittlement.