Effect of Additional Element on Hydrogen Absorption for Iron in Acidic and Neutral Sulfate Solutions

Effects of Alloying Elements on Hydrogen Diffusion in Iron

“…These results imply that hydrogen is present at the interstitial sites around the substitutional atoms that attract hydrogen owing to elastic (mechanical) interactions. In this regard, Haruna et al investigated the effects of Ni and Cr addition on D, 6) and their study demonstrated D values similar to those reported by Hagi. In general, most substitutional alloying elements in the solidsolution state are known to act as hydrogen-trapping sites and form obstacles for hydrogen diffusion in Fe.…”

Hydrogen Absorption Rate into Fe with Rust Layer Containing NaCl during Atmospheric Corrosion in Humidity-controlled Air

“…7) For example, a hydrogen concentration at the steel surface was determined in a quite short time after the hydrogen absorption condition was charged to the surface, a logarithm of the hydrogen concentration increased linearly with an increase in a steel hardness as well as in a reverse of a diffusion coefficient of hydrogen in the steel, and the hydrogen concentration decreased with a rise of cathodic potential but slightly increased with a rise of anodic potential. 8,9) On the other hand, it is also important to understand the hydrogen absorption into the steel during atmospheric corrosion, because high-strength steels often suffer HE during the usage in the open air. Some researchers have tried to monitor hydrogen absorption into the steels during atmospheric corrosion.…”

Hydrogen Absorption into Fe Plates with Rust Layers Containing Various MgCl₂ Amounts during Atmospheric Corrosion with Controlled Humidity

“…For example, a logarithm of hydrogen permeability (equal to a hydrogen absorption rate multiplied by a steel thickness) almost linearly decreases with a rise in potential in alkaline solution 9) as well as in neutral solution with H 2 S. 10,11) A hydrogen concentration at the steel surface is fixed in a quite short time after the hydrogen absorption condition charged, a logarithm of hydrogen concentration increases linearly with an increase in a steel hardness as well as in a reverse of diffusion coefficient of hydrogen in the steel, and the hydrogen concentration decreased with a rise of cathodic potential but slightly increased with a rise of anodic potential. 12,13) Many researches on hydrogen absorption including these ones were generally conducted in aqueous solutions. However, the high-strength steel frequently suffers HE during atmospheric corrosion, so that it is also important to accumulate the information on hydrogen absorption relating to the weather conditions like temperature and humidity.…”