抄録
In order to clarify the effect of surface conditions such as the oxide layer on the hydrogen permeation through the welded area of stainless steel, the permeability of stainless steels including welded area with the oxide layer which was made by heating in air was investigated. Permeation tests were conducted in such conditions as stainless steels with oxide layer only on high-pressure side where hydrogen gas was filled, or only on low-pressure side, or on the both sides. Permeability coefficient of welded stainless steels with oxide layer was different from stainless steels without oxide layer. Especially the permeability of the specimen with oxide layer on high-pressure side increased. This suggested that the permeation was considerably accelerated by adsorption of hydrogen gas on the oxide layer of the specimen.
