SUBSTRATE FOR HYDROGEN EQUIPMENT AND METHOD FOR MANUFACTURING SAME

WIPO Patent Application WO/2015/098981

A1

Provided is a substrate for use in hydrogen equipment in which steel, which is affected by hydrogen when used alone, is hot-dip plated with an aluminum-tin-based aluminum alloy with an added tin quantity of 1-5%, forming a coating resistant to hydrogen penetration that has a three-layer structure, formed by layering an aluminum-based intermetallic compound layer, an aluminum layer, and an alumina layer in this order onto the surface of the steel, with the thickness of the aluminum-based intermetallic compound layer being 1-22 µm and the mean thickness of the coating being less than 35 µm. The steel that serves as the matrix for this coating is a steel that is affected by hydrogen, such as carbon steel, low-alloy steel, ferrite-based stainless steel, martensite-based stainless steel, or the like. When used as a substrate for use in hydrogen equipment used in high-pressure hydrogen environments, this substrate can prevent hydrogen embrittlement, increase durability, and keep production costs low.

MURAKAMI YUKITAKA (JP)
MATSUOKA SABURO (JP)
YAMABE JUNICHIROU (JP)
NAKAMURA KAORU (JP)
KOJIMA YUTAKA (JP)

PCT/JP2014/084181

July 02, 2015

December 24, 2014

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UNIV KYUSHU NAT UNIV CORP (JP)
TOYOTA TSUSHO CORP (JP)
MEIHO ENGINEERING CO LTD (JP)

C23C28/00; C22C21/02; C23C2/12; C22C38/00; C22C38/48

WO2014013788A1

2014-01-23

JP2004324800A	2004-11-18
JPH1072641A	1998-03-17
JP2009544847A	2009-12-17

TOMISAKI Motonari et al. (JP)
Motonari Tomizaki (JP)

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