| 摘要 |
<p>A base material for use in hydrogen apparatus which comprises a base and, formed on the surface thereof, a coating film of a hetero-multilayer structure, the coating film comprising an aluminum-based intermetallic compound layer, an aluminum layer, and an alumina layer in this order from the base side. The base is a material which, in the step of immersion in molten aluminum, forms an aluminum oxide-based intermetallic compound through diffusion and thus comes to have a coating film of an aluminum oxide-based hetero-multilayer structure. As the material is used any of austenitic stainless steel SUS304, precipitation hardening type martensitic stainless steel SUS630, carbon steels, steels including low-alloy steels, metals, and general industrial materials. Due to this, the base material, which is for use in hydrogen apparatus to be used in a high-pressure hydrogen environment, is prevented from suffering hydrogen embrittlement, has enhanced durability, and can be produced at a reduced cost.</p> |
