Role of hydrides in hydrogen entry into steel from solutions containing promoters

Newman, J.F.; Shreir, L.L.

doi:10.1016/s0010-938x(69)80117-4

Cited by 95 publications

(35 citation statements)

References 6 publications

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“…[36][37][38][39][40][41] These compounds are of different types, while their effectiveness in enhancing hydrogen absorption and permeation can depend on their relative amounts in a given acidic or basic medium. [24,42] In the case of cathodic polarization of Armco-Fe and austenitic stainless steel such as AISI-321, an arsenic-based compound (Na 2 HAsO 4 AE7H 2 O) was found to be a better enhancer of hydrogen absorption than cyanide-based ones (such as sodium cyanide, NaCN, or thiourea [NH 2 ] 2 CS) under similar circumstances.…”

Section: A Effect Of Varying Cathodic Polarization Current On Hydrogmentioning

confidence: 99%

Hydrogen Transport Conditions and Effects in Cathodically Polarized AF1410 Steel

Charca

Uwakweh

Agarwala

2007

Metall Mater Trans A

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Hydrogen permeation of AF1410 steel membranes due to cathodic polarization using the Devanathan and Starchurski double cell (DSDC) with 0.1M H 2 SO 4 + 1 g/L Na 2 HAsO 4 AE7H 2 O, and 0.1M NaOH media in the input and exit cells, respectively, under Galvanostatic conditions depended on the polarization current density, membrane thickness, and surface roughness. For a 0.35-mm-thick membrane, the steady-state hydrogen permeated using increasing polarization currents from 1.00 to 10.00 mA varied correspondingly from 0.6 · 10 -5 (mol H/m 2 s) to 1.03 · 10 -5 mol H/m 2 s, with accompanying transient rates or permeation rates of 1.07 · 10 -4 A/m 2 s to 4.40 · 10 -4 A/m 2 s. With a constant polarization current density of 20 A/m 2 , the steady-state permeated hydrogen was in the range of 1.00 · 10 -5 (mol H/m 2 s) to 3.50 · 10 -5 (mol H/m 2 s), for 0.30-mm and 0.09-mm-thick membranes, respectively. The breakthrough times decreased from 2130 to 300 seconds with decreasing membranes thickness from 0.30 to 0.09 mm. The formation of blisters was observed more on the input side surface than on the exit-side surface and occurred for polarization charging current densities greater than 30.0 A/m 2 . The tendency for blister formation increased with decreasing materialÕs surface roughness. Cracks accompanying blisters tended to form on both the input and exit-side surfaces only with continued charging following the attainment of steady-state permeation, though they were generally lower on the potentiostated exit side. The average effective permeation coefficient of hydrogen was determined to be 2.89 · 10 -12 m 2 /s for membrane thicknesses ranging from 0.09 to 0.30 mm based on the slope method.

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Section: A Effect Of Varying Cathodic Polarization Current On Hydrogmentioning

confidence: 99%

Hydrogen Transport Conditions and Effects in Cathodically Polarized AF1410 Steel

Charca

Uwakweh

Agarwala

2007

Metall Mater Trans A

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“…After a short cathodic charging (a few minutes), hydrogen ingress into iron from alkaline solutions is about a tenth of that from acidic solutions [1][2][3], but a prolonged cathodic polarization (tens to several hundred hours) of iron in 0.1 M NaOH can result in an increase of hydrogen entry by up to two orders of magnitude [4,5]. This is due both to the different mechanisms of hydrogen evolution reaction (HER) and different surface conditions.…”

Section: Introductionmentioning

confidence: 99%

Enhanced hydrogen entry into iron from 0.1M NaOH at definite potentials

Flis-Kabulska

Flis

Zakroczymski

2008

Electrochimica Acta

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“…Elle dépend de différents paramètres : nature de l'électrolyte [20], nature et état structural du métal [21,22], conditions de polarisation, . .…”

Section: Mécanismes De Décharge Cathodiqueunclassified

L'hydrogène dans les matériaux métalliques en relation avec les interactions plasticité-environnement

Chêne

2009

PlastOx 2007 - Mécanismes Et Mécanique Des Interactions Plasticité - Environnement

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Résumé. L'objectif de cet article est de faire une revue synthétique des données de la littérature qui permettent de caractériser le comportement de l'hydrogène dans les matériaux métalliques et plus particulièrement les effets d'endommagement associés à l'hydrogène en relation avec les interactions plasticité-environnement. Dans cette présentation générale nous nous sommes limités au comportement de l'hydrogène dans les matériaux de structure tels que les alliages base fer et base nickel.Les principaux points abordés dans cette présentation sont : -des généralités sur l'absorption de l'hydrogène dans ces alliages : diffusion, perméation, piégeage, -une courte revue des principaux effets d'endommagement associés à l'absorption d'hydrogène, -quelques remarques spécifiques aux interactions hydrogène-plasticité.

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Role of hydrides in hydrogen entry into steel from solutions containing promoters

Cited by 95 publications

References 6 publications

Hydrogen Transport Conditions and Effects in Cathodically Polarized AF1410 Steel

Hydrogen Transport Conditions and Effects in Cathodically Polarized AF1410 Steel

Enhanced hydrogen entry into iron from 0.1M NaOH at definite potentials

L'hydrogène dans les matériaux métalliques en relation avec les interactions plasticité-environnement

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