材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
鉄および鋼の水素誘起割れ初期段階の透過実験
椿野 晴繁水野 哲哉山川 宏二
著者情報
ジャーナル フリー

1987 年 36 巻 411 号 p. 1343-1349

詳細
抄録

Hydrogen permeation experiments were performed continuously over 45 hours on iron and steels (0.007-0.19%C) by an electrochemical method (nickel-plating method). The hydrogen was charged cathodically with a constant current density, 40A/m2, in two buffer solutions. The blisters were observed optically and electron scanning microscopically. The hydrogen diffusivity (D) and hydrogen content (C0) were kept constant during hydrogen permeation when an acetic buffer solution was used. However, D decreased and C0 increased with permeation time, when a boric buffer solution was used. In the latter, many blisters were formed in the specimens during the permeation, but there was no blister in the former because C0 was less than 0.1ppm. Blisters were formed at nonmetallic inclusions, Al2O3. These hydrogen permeation behaviors are discussed by the hydrogen trap effect at nonmetallic inclusions and at blisters around nonmetallic inclusions.

著者関連情報
© 日本材料学会
前の記事 次の記事
feedback
Top