A5068323303- Corrosion Behavior and Inhibition
- Radioactive element chemistry and processing
- Cultural Heritage Materials Analysis
- Building materials and conservation
- Chemical Synthesis and Characterization
- Hydrogen embrittlement and corrosion behaviors in metals
- Concrete Corrosion and Durability
- Electrochemical Analysis and Applications
- Radioactive contamination and transfer
- Concrete and Cement Materials Research
- Metal Extraction and Bioleaching
- Analytical chemistry methods development
- Nuclear Materials and Properties
- Conservation Techniques and Studies
- Radioactivity and Radon Measurements
- Magnesium Oxide Properties and Applications
- Maritime and Coastal Archaeology
- Mercury impact and mitigation studies
- Enhanced Oil Recovery Techniques
- Maritime Ports and Logistics
- Analytical Chemistry and Sensors
- Electron and X-Ray Spectroscopy Techniques
- Transition Metal Oxide Nanomaterials
- Lanthanide and Transition Metal Complexes
- Spectroscopy Techniques in Biomedical and Chemical Research
Centre National de la Recherche Scientifique
2007-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2004-2024
CEA Paris-Saclay
2004-2024
Université Paris-Saclay
2008-2024
Laboratoire Archéomatériaux et Prévision de l'Altération
2013-2023
Institut de Recherche sur les ArchéoMATériaux
2014-2023
Service Interdisciplinaire sur les Systèmes Moléculaires et les Matériaux
2013-2018
Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Énergie
2018
Université Paris-Sud
2007-2016
Institut de Physique
2008-2016
The iodination of Gorleben and synthetic humic substances (HS) was studied complementarily by UV-visible X-ray Photoelectron Spectroscopy (XPS). I 2 (aq) consumption kinetics could neither be linearly correlated to [H + ] nor HS concentration as already observed in the literature. Nevertheless, electrophilic substitution mechanism further evidenced production both 3 - , leading a covalent bonding. XPS analysis iodinated samples confirmed bonding between iodine carbon for all samples.
Abstract During XPS analysis, the soft X‐ray‐induced reduction of metals such as Cr(VI) and Ce(IV) in oxides has been reported literature some mechanisms have proposed to explain this phenomenon. The U(VI) by beam during X‐ray Photoelectron Spectroscopy already but only for sorbed or precipitated onto solids with reducing properties (as micas pyrites) whose Fe(II) can also induce U(VI), TiO 2 photocatalytic are well known. objective paper is investigate effects on bulk compounds (UO 3 , UO...
In the field of nuclear waste management, prediction radionuclides migration through geosphere has to take into account effects temperature. The chosen substrate, zirconium diphosphate, was previously described concerning its surface acidity properties for several temperatures (25 °C, 50 75 90 °C). Edges uranyl sorption were obtained in NaClO 4 medium, and europium(III) edges realized KNO 3 medium evaluate influence complexing nitrate ions. Influence temperature, nature cation substrate...
In the framework of protection copper objects exposed to atmospheric corrosion, different solutions are envisaged, among them carboxylate treatments (HC10). this study, an analytical approach based on complementary techniques from micrometer nanometer scale (μRS, SEM-EDS, SAM) is used describe properties corrosion products layer (CPL) and determine penetration depth HC10 treatment inside CPL samples issued roof Saint Martin church in Metz. The consists a thick brochantite (20 50 μm), mainly...
Cette étude porte sur l’étude (macroscopique et microscopique) de la transformation galène, minerai argentifère pour les périodes anciennes, son évolution jusqu’au plomb, à partir d’un référentiel produit expérimentalement dans un four moufle fonctionnant au charbon bois. En effet, si réaction chimique qui conduit du sulfure plomb d’œuvre est identifiée depuis longtemps, sa reproduction réacteur type bas-fourneau demeure insatisfaisante tentatives compréhension des procédés galène restent...
Abstract Corrosion experiments were performed on a ferrito‐pearlitic (P285‐NH) and ferritic steel (Armco) in synthetic solution representing the Callovo‐Oxfordian porewater during month at 120°C. product layers (CPLs) characterized from micro to nanoscale terms of morphology (electron microscopies), composition (energy dispersive X‐ray spectroscopy), structure (µ‐Raman, selected area electron diffraction). Both systems present Ca‐siderite bilayer which interface locates metal original...
Abstract A two‐step corrosion experiment was performed on a ferritic steel (Armco) in synthetic solution representing the Callovo–Oxfordian at 120°C. After development of carbonated product layer (CPL) during first 15 days experimental step, front progression investigated using 13 C marked carbonate species second step. CPL characterized each terms morphology (scanning electron microscopy), composition (energy‐dispersive spectroscopy), and structure (µ‐Raman). locations were analyzed by...
Cette étude est consacrée à la détermination de l’origine biotique ou abiotique sulfures fer formés au cours processus corrosion anoxiques par l’analyse composition isotopique du soufre. Usuellement ces analyses sont réalisées IRMS (Isotopic Ratio Mass Spectrometry) sur des et sulfates préalablement dissous. Dans cette étude, en revanche, une nouvelle approche utilisée, basée isotopiques locales surface nanoSIMS afin conserver l’information localisation produits corrosion. Deux types...
Abstract Corrosion experiments were performed on two metallic substrates, a ferritic–pearlitic steel (P285NH) and ferritic one (Armco), in silicate environment during 30 days at 120°C. products characterized terms of morphology (scanning electron microscope transmission microscopy), composition (energydispersive X‐ray spectroscopy) structure (µ‐Raman, selected area diffraction, absorption near edge structure). Results show nanometric inner layer made compact adherent nanocrystallized...
The influence of acetate on U(VI) sorption silica from aqueous solutions was studied at pH 2–7 by complementary experimental methods macroscopic measurement, spectroscopic investigation and thermodynamic calculation. Sorption percentage in the absence presence different concentrations determined batch procedures. Attenuated total reflection Fourier transform infra-red spec-troscopy (ATR-FTIR) used to elucidate mechanisms uranyl acetate, investigating, in-situ, changes surface ligand:...
The preservation of bronze and copper heritage objects is challenging. Exposure to water or pollution in outdoor conditions leads corrosion phenomena, which can highly degrade the structures. We aim develop an alternative nontoxic inhibiting treatment, based on use a carboxylate (HC 10 ) treatment. Electron spectroscopies (X‐ray photoelectron spectroscopy scanning Auger microscopy) are used determine, from micrometric nanometric scale, composition chemical environments (oxidation degrees)...
The understanding of anoxic corrosion mechanism is essential to develop predictive models targeting optimize extraction and conservation operations as well aging behavior industrial or cultural heritage ferrous objects. product layers issued from carbonated environment iron often contain sulfides, pyrite FeS 2 , greigite Fe 3 S 4 mackinawite FeS, mixed at the submicron scale, their presence strongly impacts processes. determination spatial arrangement in layer directly informs about origin...