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Materials Safety for High-Pressure Hydrogen Storage for Fuel Cell Vehicles
Toshio Ogata,Kiyoshi Yokogawa 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Current situation of fuel cell vehicles (FCVs) and their infrastructure is described. High-pressure hydrogen storage at 70 MPa is developed for FCVs, thus the drafts of the standard for the compressed hydrogen storage system on board has been proposed by SAE and discussed worldwide. The high-pressure equipments for hydrogen stations and the pipelines of the infrastructure of FCVs are controlled by the governmental rule, and then ASME has been discussing and/or has proposed the codes for the hydrogen stations and the pipelines. The materials testing equipments in high-pressure hydrogen to evaluate hydrogen embrittlement (HE) in gaseous hydrogen (hydrogen gas embrittlement (HGE)) in the world are introduced. HGE behaviors of the metals are classified into four categories with HGE characteristics in the AIST HGE data. HE behavior in nano-scale is described by nano-indentation and analyzed by the theoretical calculation. The materials safety, in particular for HGE, is essentially important for the standards or codes for public safety.