A thin palladium coating on iron for hydrogen permeation studies

Manolatos, P.; Jérôme, M.

doi:10.1016/0013-4686(95)00379-7

Cited by 36 publications

(14 citation statements)

References 17 publications

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“…Steel samples were ground down to 1200‐grade emery paper, degreased and coated by Pd on one side. The necessity of coating steel with Pd for detection of hydrogen exiting at the anodic side was demonstrated by Manolatos et al The procedure described in the reference was employed to obtain a well adherent Pd coating . Samples were quickly cleaned in 35 wt% HCl just before application of the coating.…”

Section: Methodsmentioning

confidence: 99%

The effect of microstructure on hydrogen permeability of high strength steels

Rudomilova

Prošek

Salvetr

et al. 2019

Materials & Corrosion

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Hydrogen diffusivity and trapping have been studied in two advanced high strength steel grades and model samples using electrochemical permeation test. Microstructures of CP1000 and DP1000 steels consist of ferrite, martensite and a small fraction of retained austenite. In addition, bainite is present in CP1000. Model phases with predominance of a particular phase have been prepared by specific heat treatment. DP1000 has shown the lowest diffusivity among all materials, while ferritic model sample has shown the highest. Differences in hydrogen diffusion coefficient values are linked to trapping microstructural characteristics and grain size. K E Y W O R D Shydrogen-induced cracking, hydrogen permeability, steel

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Section: Methodsmentioning

confidence: 99%

The effect of microstructure on hydrogen permeability of high strength steels

Rudomilova

Prošek

Salvetr

et al. 2019

Materials & Corrosion

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“…The exit face was covered by palladium following well-established procedures. 14 Under such conditions of iron membrane thickness and environment, it is considered that permeation is mostly governed by reactions at the entry face, minimizing the impact of bulk diffusion of hydrogen. 7,15 The charging side of the iron membrane was used as a working electrode during EIS measurements, with an Ag/AgCl reference electrode and a platinum mesh as auxiliary electrode.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Corrosion and Hydrogen Permeation in H2S Environments with O2 Contamination, 1: Tests on Pure Iron at High H2S Concentration

et al. 2018

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Materials selection in the oil and gas industry relies on engineering standards, such as NACE TM0177 and NACE TM0284, which stipulate that oxygen pollution should be avoided during materials testing in H 2 S-containing media. In this paper, we explore the manner in which traces of oxygen can modify the test solution chemistry and the corrosion of/ hydrogen permeation across iron membranes in H 2 S-containing solutions. Oxygen pollution is shown to strongly influence solution chemistry, through the introduction of sulfur-oxygen reaction products resulting in bulk acidification. Weight loss, electrochemical methods, and solution chemistry measurements conclude that iron corrosion rates in the presence of oxygen pollution are doubled, when compared against the control system (without oxygen pollution). Unexpectedly, despite a lower pH and higher corrosion rates in the oxygen-polluted H 2 S-containing solutions, the hydrogen permeation rate decreases monotonically, relative to the control. We discuss how this observation is most likely related to a disruption of sulfur adsorbates involved in hydrogen entry promotion.

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“…It was generally reported in the literature that the use of Pd coating in the oxidation cell ensure reliable hydrogen permeation results in Devanathan-Stachurski setup [31,32]. This Pd coating can be either prepared by electrodeposition process or PVD deposition.…”

Section: Influence Of Pvd Pd Thin Film Microstructure On Permeation Rmentioning

confidence: 99%

“…The Devanathan-Stachurski (DS) permeation cell invented in 1962 [26] has been widely adapted for investigating hydrogen permeation through metals [27][28][29][30]. Usually, a palladium coating is required to be deposited on the exit side sample surface in order to ensure a reliable measurement of the permeation current [31,32]. However, the stability of the palladium layer in aqueous solution under anodic polarization is an important issue during operation.…”

Section: Introductionmentioning

confidence: 99%

On the robustness of the Kelvin probe based potentiometric hydrogen electrode method and its application in characterizing effective hydrogen activity in metal: 5 wt. % Ni cold-rolled ferritic steel as an example

Krieger

Rohwerder

2019

Science and Technology of Advanced Materials

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Quantitative detection of hydrogen in metal is important in providing a better basis for fundamental investigations of hydrogen embrittlement and hydrogen-related corrosion phenomena. Thermal desorption spectroscopy (TDS) has long been used in characterizing different hydrogen traps inside materials. However, in TDS measurements, the diffusible hydrogen (hydrogen at interstitial sites and weakly bound hydrogen) is usually not detected. The Davanathan-Starchurski permeation technique can cover this shortage. However, for such experiments, the stability of the palladium at the exit side, i.e. in aqueous solution under high potential polarization is an important issue. Alternatively, a Kelvin probe-based (KP-based) potentiometric method developed a few years ago has shown to allow quantitative determination of hydrogen in metal. This method is based on measuring the hydrogen electrode potential on the Pd-coated surface. The aim of this work is to check the reliability of this method and to demonstrate its potential applications in determining the hydrogen amount distributed in both shallow and deep traps in steel. The results reveal that different crystallographic orientation, grain shapes and grain sizes of the deposited palladium film (in the range of variation in this work) do not cause relevant effects on the KP-based hydrogen detection. It is shown in this work that the time lag and permeation rate derived from the permeation curves obtained by this method show a very good reliability and the calculated hydrogen amount shows a good agreement with TDS results. 5 wt.% Ni ferritic steel is used as a model material in this work.

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A thin palladium coating on iron for hydrogen permeation studies

Cited by 36 publications

References 17 publications

The effect of microstructure on hydrogen permeability of high strength steels

The effect of microstructure on hydrogen permeability of high strength steels

Corrosion and Hydrogen Permeation in H2S Environments with O2 Contamination, 1: Tests on Pure Iron at High H2S Concentration

On the robustness of the Kelvin probe based potentiometric hydrogen electrode method and its application in characterizing effective hydrogen activity in metal: 5 wt. % Ni cold-rolled ferritic steel as an example

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