The Japan Steel Works, Ltd.

Japan Steel Works M&e, Inc.

Hokkaido University

Hironobu Arashima

Takashi Ebisawa

Hideaki Itoh

Yoru Wada

Takafumi Hosoya

Kazuya Kubo

Kunihiko Hashi

Hideaki Ito

Soumei Oonuki

A hydrogen pressure vessel capable of preventing hydrogen-induced cracking of a cylinder is provided. In a hydrogen pressure vessel according to one embodiment, a gap part (G) in which an inner peripheral surface of a cylinder () is spaced apart from an outer peripheral surface of a lid () is provided between a female thread part () of the cylinder () into which the lid () is screwed, and a resin seal member (), and the cylinder () includes a first through hole () for discharging gas in the gap part (G) into a relief pipe () and a second through hole () for introducing gas containing oxygen into the gap part (G) formed therein.

Hydrogen pressure vessel

Storage container for high pressure liquid or gas

A melt of a hydrogen storage alloy having an arbitrary composition is cooled gradually at a cooling rate of 5&#xb0; C./min or less and solidified. Alternatively an alloy having an arbitrary composition, after heating to a temperature equal to or more than a melting point thereof, is cooled gradually at a cooling rate of 5&#xb0; C./min or less and solidified. Thereby a homogeneous alloy reduced in segregation, precipitates, or inclusions is obtained. The homogeneous alloy is excellent in the hydrogen storage amount, in the plateau property and in durability.

Method of producing hydrogen storage alloy

Growing community of inventors

Muroran, Japan

Hironobu Arashima