Change search
Refine search result
1 - 18 of 18
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Ayagou, Martien
    et al.
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Joshi, G. R.
    IFP Energies Nouvelles, France.
    Tran, T. T. M.
    Sorbonne Université, France.
    Sutter, E.
    Sorbonne Université, France.
    Tribollet, B.
    Sorbonne Université, France.
    Mendibide, Christophe
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Duret-Thual, Claude
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Ferrando, N.
    IFP Energies Nouvelles, France.
    Kittel, J.
    IFP Energies Nouvelles, France.
    Corrosion and hydrogen permeation in H 2 S environments with O 2 contamination, Part 2: Impact of H 2 S partial pressure2019In: Corrosion, ISSN 0010-9312, E-ISSN 1938-159X, Vol. 75, no 4, p. 389-397Article in journal (Refereed)
    Abstract [en]

    Materials selection in the oil and gas industry relies on engineering standards, such as NACE TM0177 and NACE TM0284, which stipulate that oxygen contamination should be avoided during materials testing in H 2 S-containing media. In this second paper, as part of a series of articles that evaluates how traces of oxygen modify the corrosion of pure iron and hydrogen permeation across iron membranes in H 2 S-containing solutions, the impact of changing the H 2 S partial pressure from 100 kPa to 0.1 kPa was investigated. It was found that bulk solution chemistry for all H 2 S partial pressures changes with time, due to the formation of H 2 S–O 2 reaction products (sulfates, sulfites, and thiosulfates), which results in bulk solution acidification. Electrochemical and weight-loss measurements confirm that Fe corrosion rates in baseline well-deaerated H 2 S-containing solutions decrease with decreasing H 2 S partial pressure, although these are observed to be much higher under continuous oxygen contamination. With decreasing H 2 S partial pressure, hydrogen uptake in Fe also decreases, due to lower and lower concentrations of dissolved H 2 S and the associated increase in pH. However, even at 1 kPa and 0.1 kPa H 2 S, permeation effciencies remain close to 100% when no O 2 contamination is present. The hydrogen uptake is always relatively lower in Fe exposed to oxygen-polluted H 2 S solutions. Permeation efficiencies decrease continuously. From electrochemical data and surface characterization, these observations at lower H 2 S partial pressures are attributed to the disruptive effect of oxygen on the nature of sulfide corrosion products, and hydrogen entry promotion, along with the contribution of an additional cathodic reaction that does not result in hydrogen entry into the metal

  • 2.
    Ayagou, Martien
    et al.
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB. IFP Energies nouvelles, France.
    Mai Tran, Thi
    Sorbonne Universite, France.
    Tribollet, Bernard
    Sorbonne Universite, France.
    Kittel, Jean
    IFP Energies nouvelles, France.
    Sutter, Elaine
    Sorbonne Universite, France.
    Ferrando, Nicolas
    IFP Energies nouvelles, France.
    Mendibide, Christophe
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Duret-Thual, Claude
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Electrochemical impedance spectroscopy of iron corrosion in H2S solutions2018In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 282, p. 775-783Article in journal (Refereed)
    Abstract [en]

    Corrosion of iron exposed to H2S saturated solution at pH 4 was studied by electrochemical impedance spectroscopy, weight loss coupons and surface analysis. Hydrogen permeation was also used as indirect means of evaluating the intensity of the proton reduction reaction leading to hydrogen entry into the metal. Since corrosion in this type of test solution results in the rapid build-up of a conductive and highly porous iron sulfide scale, a specific contribution of the film has to be considered. An impedance model was thus proposed. The faradaic anodic impedance consists of a two-step reaction with charge transfer and adsorption – desorption. An additional contribution, associated with the conductive and highly porous iron sulfide film was added in parallel. This contribution, mostly visible in the low frequency domain, presents a 45° tail associated with a porous electrode behavior. This model was well adapted to describe impedance diagrams measured at various exposure times, up to 620 h. Charge transfer resistance determined from impedance analysis allowed calculating the evolution with time of the corrosion current density. A very good correlation was found between this corrosion current density and the hydrogen permeation current density. As expected in our experimental conditions, a permeation efficiency close to 100% is demonstrated. Corrosion rate of 490 μm/year was measured by weight-loss specimens, confirming the validity of the impedance analysis, which resulted in a calculated corrosion rate of 530 μm/year.

  • 3.
    Ayagou, Martien
    et al.
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Mendibide, Christophe
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Duret-Thual, Claude
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Kittel, J.
    IFP Energies Nouvelles, France.
    Belkhadiri, K.
    IFP Energies Nouvelles, France.
    Tran, T. T. M.
    Sorbonne Université, France.
    Sutter, E.
    Sorbonne Université, France.
    Tribollet, B.
    Sorbonne Université, France.
    Ferrando, N.
    IFP Energies Nouvelles, France.
    Corrosion and hydrogen permeation in h2S environments with o2 contamination, 1: Tests on pure iron at high h2S concentration2018In: Corrosion, ISSN 0010-9312, E-ISSN 1938-159X, Vol. 74, no 11, p. 1192-1202Article in journal (Refereed)
    Abstract [en]

    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 H2S-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 H2S-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 H2S-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. 

  • 4.
    Bulidon, Nicolas
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Deydier, Valerie
    Andra, France.
    Bumbieler, Frederic
    Andra, France.
    Duret-Thual, Claude
    RISE Research Institutes of Sweden, Materials and Production, Corrosion. Exacorr, France.
    Mendibide, Christophe
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Crusset, Didier
    Andra, France.
    Stress corrosion cracking susceptibility of P285NH and API 5L X65 steel grades in the high-level radioactive waste repository cell concept2021In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, no 1-2, p. 154-165Article in journal (Refereed)
    Abstract [en]

    Since 2014, the concept developed for the disposal of high-level radioactive waste in the French deep geological repository project Cigéo includes a cement-based grout material. This cement-based grout material will be injected between the casing and the claystone to neutralize the potential acidity resulting from the claystone oxidation induced by the drilling process of the disposal cell. In these conditions of pH (around 10.5) and temperature (90°C, maximum expected during the disposal), the metallic materials could be sensitive to stress corrosion cracking (SCC). In this project, different environments (aerated or deaerated, at room temperature or at 90°C) and synthetic solutions are considered to reproduce the different periods expected during the long life repository. The project is based on electrochemical measurements (polarization curves to define the SCC critical domain of potentials), slow strain rate tensile tests, and long-term immersion for crack initiation and propagation tests.

  • 5.
    Bulidon, Nicolas
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Pélissier, Krystel
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Boissy, Clément
    M.E.C.M Rond-point de l'échangeur, France.
    Mendibide, Christophe
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Maillot, Valérie
    Andra, France.
    Bourbon, Xavier
    Andra, France.
    Crusset, Didier
    Andra, France.
    Hydrogen production through aluminium corrosion in a cement-based matrix2023In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, Vol. 74, no 11-12, p. 1765-1776Article in journal (Refereed)
    Abstract [en]

    In France, deep geological disposal is considered for the storage of high and intermediate-level long-lived radioactive wastes. For aluminium, the possibility to encapsulate the wastes in a cement-based matrix is studied. However, cement being an alkaline environment, aluminium can lose its passivity, starts to corrode leading to hydrogen evolution in the infrastructures and generate a possible explosive hazard after decades of storage if hydrogen can accumulate somewhere in the facility. It is therefore necessary to study the corrosion behaviour of aluminium in the different cements considered for the encapsulation to estimate the possible amount of hydrogen that could be generated through corrosion and design the cement capsules accordingly. This work mainly focused on the reaction occurring at the aluminium-cement interface. Raman spectroscopy did not highlight significant differences in the nature of the corrosion products forming at the cement/aluminium interface, leading to the conclusion that it is not the chemistry of the cement that is the key factor controlling the corrosion rate but rather the physical properties of the cement matrix. 

  • 6.
    Deffo Ayagou, Martien
    et al.
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB. IFP Energies nouvelles, France.
    Joshi, Gaurav
    IFP Energies nouvelles, France.
    Mai Tran, Thi
    Sorbonne Université, France.
    Tribollet, Bernard
    Sorbonne Université, France.
    Sutter, Eliane
    Sorbonne Université, France.
    Mendibide, Christophe
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Duret-Thual, Claude
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Kittel, Jean
    IFP Energies nouvelles, France.
    Impact of oxygen contamination on the electrochemical impedance spectroscopy of iron corrosion in H2S solutions2019In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, article id 108302Article in journal (Refereed)
    Abstract [en]

    Oxygen pollution in hydrogen sulfide (H2S) saturated test solutions can compromise the results of standardized tests, which guide materials selection in safety-critical components. To examine the temporal evolution of such contamination, we have used the electrochemical methods of impedance spectroscopy and hydrogen permeation to study the corrosion of iron exposed to oxygen-polluted H2S-saturated solutions. EIS analyses were performed with a previously developed model, which explicitly accounts for the contribution of a conductive and porous iron sulfide overlayer. A good correlation is found between corrosion estimates from EIS and weight loss, measured to be higher than the O2-free case. Hydrogen permeation studies across the iron membrane were conducted to qualitatively evaluate the impact of dissolved O2 on hydrogen entry. We observe that O2 contamination was found to significantly reduce hydrogen charging into the metal. 

  • 7.
    Larché, Nicolas
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Emo, Benoit
    Veolia, France.
    Thierry, Dominique
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Duquesnes, Vincent
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Mendibide, Christophe
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Localized corrosion of lean duplex stainless steels in H2S-containing wet atmosphere from urban wastewater treatment units2021In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, no 11, p. 1730-Article in journal (Refereed)
    Abstract [en]

    With lower alloying costs and higher mechanical properties, lean duplex stainless steels can be a good alternative to the more commonly used austenitic stainless steels. A study was initiated to define the limits of the use of lean duplex stainless steels for urban wastewater treatment (WWT) units. This paper gives and discusses the corrosion results in an aerated wet atmosphere containing H2S at different levels. Exposures were performed both at laboratory scale and in the field WWT plant for 1 year. A specific probe was also designed to study the corrosion process below water condensate film contaminated with H2S. Under such conditions, the properties of stainless steel were strongly modified with an enhanced risk of localized corrosion. The results obtained on lean duplex materials (UNS S32101, S32202, and S32304) are compared with austenitic UNS S30403 and UNS S31603 and with the more standard duplexes UNS S82441 and UNS S32205. The results show that lean duplexes can be used in aerated wet atmospheres in case of moderate contamination of H2S (<10 ppm) and chloride (<200 ppm). For higher contaminations (e.g., H2S around 100 ppm/chloride around 1000 ppm) the duplex S32205 should be preferred.

  • 8.
    Martien, Daffo
    et al.
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Mendibide, Christophe
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Duret-Thual, Claude
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Ferrando, N.
    IFP Energies Nouvelles, France.
    Kittel, J.
    IFP Energies Nouvelles, France.
    Sutter, E.
    Laboratoire Interfaces et Systèmes Electrochimiques, France.
    Tran, T. T. M.
    Laboratoire Interfaces et Systèmes Electrochimiques, France.
    Tribollet, B.
    Laboratoire Interfaces et Systèmes Electrochimiques, France.
    Corrosion of pure iron and hydrogen permeation in the presence of H2S with O2 contamination2018In: NACE - International Corrosion Conference SeriesVolume 2018-April, 2018Corrosion Conference and Expo 2018; Phoenix; United States; 15 April 2018 through 19 April 2018, National Assoc. of Corrosion Engineers International , 2018Conference paper (Refereed)
    Abstract [en]

    This paper examines the influence of traces of oxygen on corrosion and hydrogen charging of steel in an H2S containing environment. It is well known that H2S promotes hydrogen entry into steels, that may result in many types of steel failures such as Hydrogen Induced Cracking (HIC), Sulfide Stress Cracking (SSC), and Stress-Oriented Hydrogen Induced Cracking (SOHIC). Since it is a huge concern for oil and gas industries, standard test methods have been developed and published as NACE technical methods (e.g. NACE TM0284 and NACE TM0177). Though it is recognized that oxygen pollution should be avoided during H2S cracking tests, there is still a lack of experimental data to illustrate the potential impacts of a small oxygen pollution. The aim of the present study is to check if oxygen traces can modify the mechanisms of corrosion and hydrogen charging of steel in H2S containing medium. Experiments consisted of hydrogen permeation measurements through a thin pure iron membrane. They were performed at free potential circuit in order to ensure more realistic environmental conditions. The corrosion rate was also evaluated and test solutions analyzed. 

  • 9.
    Martien, Duffo
    et al.
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Mendibide, Christophe
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Duret-Thual, Claude
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Jean, K.
    IFP Energies Nouvelles, France.
    Ferrando, N.
    IFP Energies Nouvelles, France.
    Sutter, E.
    Laboratoire Interfaces et Systèmes Electrochimiques, France.
    Tran, T. T. M.
    Laboratoire Interfaces et Systèmes Electrochimiques, France.
    Tribollet, B.
    Laboratoire Interfaces et Systèmes Electrochimiques, France.
    EIS study of iron and steel corrosion in aqueous solutions at various concentrations of dissolved H2S: Impact of oxygen contamination2019In: NACE - International Corrosion Conference SeriesVolume 2019-March, 2019, Article number 13041Corrosion Conference and Expo 2019; Nashville; United States; 24 March 2019 through 28 March 2019, National Assoc. of Corrosion Engineers International , 2019Conference paper (Refereed)
    Abstract [en]

    Mildly acidic water containing dissolved H2S presents a strong risk in the cracking of low-carbon steels. Several studies on H2S cracking mechanisms have shown that the main driving force is linked to the ability of H2S to promote hydrogen entry into the bulk material. Standard test methods have been developed and published as NACE technical standards (e.g. NACE TM0284 and NACE TM0177) to aid materials selection in the oil and gas sector. Though it is recognized that oxygen pollution should be avoided during H2S cracking tests, there is a lack of experimental data to illustrate the effects of a small oxygen pollution. Dissolved oxygen concentrations greater than the recommended upper limit (50 parts per billion) can easily be obtained in the case of poor laboratory practices. This paper will focus on the interactions between oxygen and H2S on electrochemical behavior of unalloyed steel. A continuous O2 injection at a level corresponding to 500 ppb is applied, together with H2S bubbling in our test solutions, for periods lasting the same order as SSC standard tests. Steel surface reaction phenomena/corrosion rates in H2S saturated solution, with or without oxygen pollution, are studied using electrochemical impedance spectroscopy. The evolution of corrosion rates obtained from impedance analysis was compared to two other independent methods: i/ weight loss measurements and, ii/ hydrogen permeation. Without O2 pollution, a permeation efficiency of 100% was obtained, as expected. Permeation current density was thus found to match precisely with the corrosion current density determined by impedance analysis at different times. On the other hand, when a continuous O2 pollution was added in the system, significantly higher corrosion rates were observed, associated with test solution acidification. At the same time, permeation efficiency was decreased by up to one order of magnitude. 

  • 10.
    Martien Duvall, Deffo
    et al.
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Mendibide, Christophe
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Duret Thual, Claude
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Sutter, E.
    Laboratoire Interfaces et Systèmes Electrochimiques, France.
    Tran, M.
    Laboratoire Interfaces et Systèmes Electrochimiques, France.
    Tribollet, B.
    Laboratoire Interfaces et Systèmes Electrochimiques, France.
    Ferrando, N.
    IFP Energies nouvelles, France.
    Kittel, J.
    IFP Energies nouvelles, France.
    Impact of oxygen on corrosion and hydrogen permeation of pure iron in the presence of H2S2017In: EUROCORR 2017 - The Annual Congress of the European Federation of Corrosion, 20th International Corrosion Congress and Process Safety Congress 2017, Asociace koroznich inzenyru z.s.- AKI - Czech Association of Corrosion Engineers , 2017Conference paper (Refereed)
    Abstract [en]

    This paper examines the influence of oxygen traces on corrosion and hydrogen charging of steel in H2S containing environment. It is well known that H2S is the driving force for many types of steel failures such as hydrogen induced cracking (HIC), sulfide stress cracking (SSC), and stress-oriented hydrogen induced cracking (SOHIC). Since it is a huge concern for oil and gas industries, standard test methods have been developed and published as NACE technical methods (e.g. NACE TM0284 and NACE TM0177). Though it is recognized that oxygen pollution shall be avoided during H2S cracking tests, there is still a lack of experimental data to illustrate the potential impacts of a small oxygen pollution. The aim of the present study was to check if oxygen traces can modify corrosion mechanisms and hydrogen charging of steel in H2S medium. Experiments consisted in hydrogen permeation measurements through thin pure iron membrane. They were performed at corrosion potential in order to be in realistic environmental conditions. Corrosion rate was also evaluated through weight loss measurements. Analysis of test solutions was performed in order to identify reaction products between H2S and O2

  • 11.
    Mendibide, Christophe
    et al.
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Deffo-Ayagou, Martien
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Duret-Thual, Claude
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Kittel, J
    IFP Energies Nouvelles Rond Point de l'échangeur de Solaize, France.
    O2 contamination in SSC / HIC test environments. Impact on test results and discussion on acceptable limits for high H2S content2019In: NACE - International Corrosion Conference SeriesVolume 2019-March, 2019, Article number 12894Corrosion Conference and Expo 2019; Nashville; United States;, National Assoc. of Corrosion Engineers International , 2019Conference paper (Refereed)
    Abstract [en]

    It is a well admitted fact that oxygen contamination shall be avoided during H2S cracking tests of low alloy steels. In the 2016 revisions of NACE TM0177 and NACE TM0284 documents, quantitative limits of O2 contamination were included with thresholds at 10 and 50 ppb of dissolved oxygen depending on the considered mechanical properties of the tested grade. However, the scientific basis of these values are not well established and there is still a lack of experimental data to illustrate the potential impacts of an oxygen pollution. In addition, while the revised test methods explicitly address initial contamination of the test solution before H2S introduction, they do not consider a continuous oxygen supply during testing. Yet, continuous contamination is extremely difficult to be completely eliminated. In order to better understand the impact of O2 contamination on H2S cracking, a 3-years Joint Industrial Project was launched at the end of 2015. The objectives were to evaluate if O2 contamination can affect H2S cracking test results. A range of steel grades covering different types of O&G applications for High H2S content were used. SSC (uniaxial tensile tests as well as 4 point-bend) and HIC tests were conducted, with well controlled and continuous O2 contamination. Three levels of O2 partial pressures in the gas feed corresponding to 300 ppb, 50 ppb and less than 10 ppb dissolved O2 were used. In parallel to the standard qualification tests, hydrogen permeation and weight-loss corrosion experiments were performed with the same test matrix, covering all regions of the SSC severity diagram. This paper aims at sharing the main results of this project for high H2S content. 

  • 12.
    Mendibide, Christophe
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Dessolin, Carole
    Metal'in, France.
    Selective Dissolution Forming on Duplex Stainless Steels during Sour Testing. Is it a Pass or a Fail?2023In: Corrosion, ISSN 0010-9312, E-ISSN 1938-159X, Vol. 79, no 2, p. 174-192Article in journal (Refereed)
    Abstract [en]

    In this study, the effect of test conditions on the formation of selective dissolution during sour testing was investigated on a cold-rolled duplex stainless steel UNS S32750. All experiments were conducted in NaCl 150 g/L and pH2S = 0.3 bar. Different pHs between 3.3 and 4.5 were studied at 80°C. Based on tests performed under varying conditions, it is demonstrated that selective dissolution (SD) competes with cracking and that under conditions leading to the formation of a large area with SD, the presence of this type of corrosion can hide the susceptibility of the material to cracking. The presence of only SD after testing must therefore be considered with caution. SD initiated also without applied stress showing that the phenomenon is correlated to a loss of passivity. From electron backscattered diffraction (EBSD) analyses and electrochemical monitoring the formation of SD under the test conditions considered in this work is correlated to the instability of the passive film and not to any superficial singularities of the material or specific crystallographic orientations. 

  • 13.
    Mendibide, Christophe
    et al.
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Duret-Thual, Claude
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Determination of the critical pitting temperature of corrosion resistant alloys in H2S containing environments2018In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 142, p. 56-65Article in journal (Refereed)
    Abstract [en]

    The study aimed at developing a test method allowing to evaluate the critical pitting temperature of corrosion resistant alloys in H2S containing environments. ASTM G150 method is indeed not appropriate in sour environment due to the oxidation of H2S at high applied potential and to the decrease of H2S partial pressure as the temperature increases. The study underlines that critical pitting temperature measurement is possible in H2S-containing environments but that the determined temperature is probably not potential independent. The methodology can however be used to rank different alloys provided the selection of a test media representative from service conditions.

  • 14.
    Mendibide, Christophe
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Dusquesnes, Vincent
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Deydier, Valerie
    ANDRA Direction de la Recherche et Développement, France.
    Bourbon, Xavier
    ANDRA Direction de la Recherche et Développement, France.
    Crusset, Didier
    ANDRA Direction de la Recherche et Développement, France.
    Corrosion behavior of aluminum alloy 5754 in cement-based matrix-simulating nuclear waste disposal conditions2021In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, Vol. 72, no 1-2, p. 383-395Article in journal (Refereed)
    Abstract [en]

    Depending on the lifetime and level of radioactivity of radioactive wastes, different disposal facilities are considered. Though low- and intermediate-level short-lived waste can be disposed in surface disposal facilities, deep geological disposal is considered for high- and intermediate-level long-lived waste. In France and Belgium, long-term disposal is studied in clay host rock media. For aluminum, the disposal concept is based on encapsulation of the waste in a cement-based matrix. It is also well-known that aluminum is prone to severe corrosion in sufficiently alkaline environments leading to possible hydrogen production. To ensure the safety of the disposal facilities and the integrity of the cement capsules, the amount of aluminum that is disposed in each waste package must be specified and is limited to mitigate the level of hydrogen production by aluminum corrosion. In the present study, the corrosion resistance of an aluminum alloy (grade EN-AW-5754/H111) in two different cement matrices was studied in different configurations at room temperature. In each case, the evolution of hydrogen production was monitored to address the corrosion rate variation versus time.

  • 15.
    Mendibide, Christophe
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Vucko, Flavien
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Martinez, M
    IFP Energies Nouvelles, France.
    Joshi, GR
    IFP Energies Nouvelles, France.
    Kittel, J
    IFP Energies Nouvelles, France.
    Effect of degraded environmental conditions on the service behavior of a X65 pipeline steel not designed for hydrogen transport2024In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 52, p. 1019-Article in journal (Refereed)
    Abstract [en]

    With the international drive to deploy green energies and decarbonized intermediates in the place of fossil fuel sources, a large number of developed countries are actively preparing for a future where hydrogen plays a strategic role as an energy storage medium. Producing and using hydrogen requires the rapid expansion of a dedicated, economically viable industrial sector. Nevertheless, questions on how to safely store, transport and distribute hydrogen remain an important priority today. In countries with existing natural gas transport grids, the possibility to retrofit these networks to store and transport hydrogen-natural gas blends is being studied. A key challenge is to evaluate how pressurized H2 would interact with steel structures with regards structural embrittlement of the latter, with a view to exploiting existing transport infrastructures for storage and transport applications. In this work, we evaluate the H2-performance of a non-hydrogen service ×65 pipeline steel. The cracking susceptibility of this steel grade has been evaluated at 100 bar H2 using slow strain rate testing, Constant strain testing and fracture toughness measurements. Accompanying hydrogen permeation tests under pressure provide diffusion data and elucidate the discussion. Exposures were carried out in dry or wet H2 and with or without H2S contamination at levels representative of biogas. The results underline that the impact of dry or wet hydrogen on this grade are moderate. The presence of traces of H2S together with humidity could risk seriously degrading the mechanical performance of the ×65 steel grade. © 2023 The Authors

    Download full text (pdf)
    fulltext
  • 16.
    Ruel, F.
    et al.
    Aperam R and D, France.
    Saedlou, S.
    Aperam R and D, France.
    Mendibide, Christophe
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Influence of temperature and pH on SCC assisted by H 2 S susceptibility of 22 %Cr duplex2018In: NACE - International Corrosion Conference SeriesVolume 2018-April, 2018Corrosion Conference and Expo 2018; Phoenix; United States;, National Assoc. of Corrosion Engineers International , 2018Conference paper (Refereed)
    Abstract [en]

    Depending on environmental conditions UNS (1) S32205 duplex stainless steel may suffer from Stress Corrosion Cracking (SCC) assisted by H 2 S initiated by local corrosion processes that involve the selective dissolution of the ferritic phase or the austenitic phase. The intent of this paper is first to study the evolution of the susceptibility of SCC assisted by H 2 S according temperature and pH. In a second phase, links are highlighted between the differences of cracking resistance and localized corrosion morphologies. Results show that the temperature of highest susceptibility to SCC assisted by H 2 S depends on the pH of the environment, moving from 80 °C at low pH (2.8 - 3.5) to temperature between 50 - 20 °C at higher pH (4.5 - 6.0). The maximum of cracking susceptibility seems to correlate with selective corrosion of ferrite coupled with transgranular cracks of the austenite.

  • 17.
    Ruel, F.
    et al.
    Aperam RandD, France.
    Saedlou, S.
    Aperam RandD, France.
    Mendibide, Christophe
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Manchet, S. L.
    Industeel, France.
    Wolski, K.
    Ecole Nationale Supérieure des Mines de Saint-Etienne, France.
    Effect of the substitution of Ni by N and Mn in Lean Duplex Stainless steels on Stress corrosion Cracking assisted by H 2 S2017In: NACE - Int. Corros. Conf. Ser., National Assoc. of Corrosion Engineers International , 2017, p. 3376-3387Conference paper (Refereed)
    Abstract [en]

    The importance of passive film stability and mechanical properties of the UNS (1) S32304, S32202 and S32101 Lean Duplex Stainless Steel grades on Stress Corrosion Cracking (SCC) is discussed in this paper. Measurement of uniform corrosion resistance in the presence of H 2 S, through polarization curves, and slip steps height and spacing, through Atomic Force Microscopy technique (AFM) have been performed. Results show that, as opposed to N, Mn decreases the passive film stability and slip steps height and spacing at the surface of the austenitic phase. Therefore, on the basis of slow strain rate tensile tests where the grade S32202 show a greater SCC resistance than the grades S32304 and S32101, it can be concluded that the electrochemical passive film stability makes the larger contribution to SCC phenomenon and so the negative impact of Mn.

  • 18.
    Trillo, E.
    et al.
    Southwest Research Institute, US.
    Duret-Thual, Claude
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Thierry, Dominique
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Mendibide, Christophe
    RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
    Salvatori, I.
    RINA Consulting, Italy.
    Alleva, L.
    RINA Consulting, Italy.
    Martin, J. W.
    JWM Materials Consulting, UK.
    Assessment of the hydrogen induced stress cracking resistance of precipitation hardened nickel-based alloys using the slow strain rate tensile test method - Experimental parameters and related issues2019In: NACE - International Corrosion Conference SeriesVolume 2019-March, 2019, Nashville; United States; 24 March 2019 through 28 March 2019;, National Assoc. of Corrosion Engineers International , 2019Conference paper (Refereed)
    Abstract [en]

    Within the framework of a Joint Industrial Project (JIP) sponsored by several petroleum companies, the behavior of several Precipitation Hardened (PH) Ni-based alloys with respect to Hydrogen Induced Stress Cracking (HISC) resistance was studied using the Slow Strain Rate Tensile (SSRT) test method under hydrogen charging conditions. The experimental conditions included a 0.5M sulfuric acid solution at 5 mA/cm2 and at 40°C at a strain rate of 10-6 sec-1. A round robin was performed that highlighted the need to measure the effective strain rate of the specimen during the elastic part of the SSRT test, the cell configuration, the current density, the gas cap composition, were all studied to determine the effects on the results. Once the test conditions had been optimized, the study of different industrial heats was carried out on specimens sampled in three locations, 120 degrees apart and at mid radius. It was found that sampling different areas could lead to changes in the test results, resulting mainly from microstructural variances at different locations of the bar. The results generated in this program could then be studied by relating plastic elongation obtained under CP as well as cracking mode and microstructure compliance with the API 6A CRA standard.

1 - 18 of 18
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf