Hydrogen Embrittlement of Duplex Stainless Steel 2205 and TiPd Alloy in a Synthetic Bentonite Pore Water

Stoulil, J.; Kouřil, Milan; Carreno, Yoel Ramos; Dobrev, David; Gondolli, Jenny; Nová, Kateřina

doi:10.5006/2852

Cited by 2 publications

(2 citation statements)

References 38 publications

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“…Superficial FeS working as cathode to the surrounding matrix is supposed to be responsible for the pitting [10,11], but further studies have shown that there is inevitable oxidation of sulphide to thiosulphate by residual oxygen [12][13][14]. Stainless steel can be susceptible in repository environment under certain circumstances also to stress corrosion cracking [15,16] or hydrogen embrittlement [17]. Stainless steel was considered also in USA [18] or Belgian [19] concept.…”

Section: Introductionmentioning

confidence: 99%

Localised Corrosion of Stainless Steels 316l and 2205 in Synthetic Bentonite Pore Water and Bentonite Slurry

Stoulil¹,

Павлова²,

Kouřil³

2021

Acta Metall Slovaca

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One concept for Czech canister construction for deep geological repository considers stainless steel as an inner case material. Corrosion resistance to localised (pitting/crevice) corrosion and stress corrosion cracking of austenitic stainless steel 316L and duplex steel 2205 was studied. The environment was synthetic bentonite pore water (SBPOW) of domestic bentonite BaM, or a slurry of bentonite in SBPOW. Tests were carried out between 40 °C and 90 °C under anaerobic conditions of a nitrogen atmosphere. The following methods were used for evaluation: potentiostatic tests at oxidation-reduction potential of the environment, long-term exposure tests in SBPOW and slurry, slow strain rate tensile test (SSRT), exposure test of U-bends, and optical microscopy. Results showed no susceptibility of either material to stress corrosion cracking. No localised corrosion was observed up to 70 °C. There was no localised attack observed in SBPOW at 90 °C, but there was localised corrosion detected in the bentonite slurry. Forced breakdown of the passive layer during SSRT, and artificial crevices (O-rings), showed no effect on localised corrosion propagation. The detrimental effect was probably a result of the adsorption ability of the bentonite particles, which allowed breakdown of passive layer and disabled repassivation of metastable pits.

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Section: Introductionmentioning

confidence: 99%

Localised Corrosion of Stainless Steels 316l and 2205 in Synthetic Bentonite Pore Water and Bentonite Slurry

Stoulil¹,

Павлова²,

Kouřil³

2021

Acta Metall Slovaca

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“…It is candidate material for outer case in Scandinavian concept [1][2][3][4][5] and for coating in Canadian [6][7][8][9][10]. Copper is also one of the candidate materials for construction of canisters in Czech concept [11][12][13][14][15][16][17][18]. In previous works we studied the effect of sulphide content on corrosion rate of copper in bentonite pore solution [18] and simulation of galvanic couple with carbon steel [14].…”

Section: Introductionmentioning

confidence: 99%

Exposure tests of copper foils in a slurries of different bentonites

Stoulil

Kouřil

Dobrev

2019

Koroze a Ochrana Materialu

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The goal of the study was to compare corrosion performance of copper in different bentonite slurries. Copper coil samples were exposed in a slurries of bentonites BaM, Rokle, B75, G2M, Voltex, Sabenil. The test was carried out under anaerobic conditions in glovebox at laboratory temperature for duration of one to four months. Samples were evaluated by means of X-ray diffraction and mass loss. Liquid parts of slurries were analysed by ion chromatography and pH meter. The resistance of copper in all studied bentonites was very high. Corrosion rates were in order of tenths of micrometers per year. No trend between pore solution composition and corrosion rate or composition of corrosion products was observed.

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Hydrogen Embrittlement of Duplex Stainless Steel 2205 and TiPd Alloy in a Synthetic Bentonite Pore Water

Cited by 2 publications

References 38 publications

Localised Corrosion of Stainless Steels 316l and 2205 in Synthetic Bentonite Pore Water and Bentonite Slurry

Localised Corrosion of Stainless Steels 316l and 2205 in Synthetic Bentonite Pore Water and Bentonite Slurry

Exposure tests of copper foils in a slurries of different bentonites

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