Corrosion of copper and authigenic sulfide mineral growth in hydrothermal bentonite experiments

Caporuscio, F. A.; Palaich, Sarah E. M.; Cheshire, M. C.; Jové Colón, Carlos F.

doi:10.1016/j.jnucmat.2016.12.036

Title: Corrosion of copper and authigenic sulfide mineral growth in hydrothermal bentonite experiments

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Abstract

The focus of this experimental paper is to characterize interaction of bentonite with possible used-fuel waste container materials. Experiments were performed up to 300 °C at 150–160 bars for five to six weeks. Bentonite was saturated with a 1900 ppm K-Ca-Na-Cl-bearing water with Cu-foils. Copper rapidly degrades into chalcocite (CuS₂) and minor covellite (CuS) in the presence of H₂S. Chalcocite growth and corrosion pit depths were measured for four different experimental runs yielding corrosion rates between 8.8 and 116 μm/yr depending on duration of experiment, brine composition, and clay type (bentonite vs. Opalinus Clay). Results of this research show that although pit-corrosion is demonstrated on Cu substrates, experiments show that the reactions that ensue, and the formation of minerals that develop, are extraordinarily slow. Finally, this supports the use of Cu in nuclide-containment systems as a possible engineered barrier system material.

Authors:

Caporuscio, F. A. ^[1]; Palaich, Sarah E. M. ^[2]; Cheshire, M. C. ^[1]; Jové Colón, Carlos F. ^[3]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of California, Los Angeles, CA (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Publication Date:: Thu Dec 29 00:00:00 EST 2016

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Office of Nuclear Energy (NE), Fuel Cycle Technologies (NE-5); USDOE

Contributing Org.:: Univ. of California, Los Angeles, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

OSTI Identifier:: 1360701

Alternate Identifier(s):: OSTI ID: 1411821

Report Number(s):: LA-UR-16-22404
Journal ID: ISSN 0022-3115

Grant/Contract Number:: AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Nuclear Materials

Additional Journal Information:: Journal Volume: 485; Journal ID: ISSN 0022-3115

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Corrosion; Copper; Bentonite; Hydrothermal experiment; Engineered barrier; Canister

Citation Formats


                    Caporuscio, F. A., Palaich, Sarah E. M., Cheshire, M. C., and Jové Colón, Carlos F. Corrosion of copper and authigenic sulfide mineral growth in hydrothermal bentonite experiments.  United States: N. p., 2016. 
Web.  doi:10.1016/j.jnucmat.2016.12.036.

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                    Caporuscio, F. A., Palaich, Sarah E. M., Cheshire, M. C., & Jové Colón, Carlos F. Corrosion of copper and authigenic sulfide mineral growth in hydrothermal bentonite experiments.  United States.  https://doi.org/10.1016/j.jnucmat.2016.12.036

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                    Caporuscio, F. A., Palaich, Sarah E. M., Cheshire, M. C., and Jové Colón, Carlos F. Thu .  
"Corrosion of copper and authigenic sulfide mineral growth in hydrothermal bentonite experiments".  United States.  https://doi.org/10.1016/j.jnucmat.2016.12.036.  https://www.osti.gov/servlets/purl/1360701.

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@article{osti_1360701,

  title        = {Corrosion of copper and authigenic sulfide mineral growth in hydrothermal bentonite experiments},

  author       = {Caporuscio, F. A. and Palaich, Sarah E. M. and Cheshire, M. C. and Jové Colón, Carlos F.},

  abstractNote = {The focus of this experimental paper is to characterize interaction of bentonite with possible used-fuel waste container materials. Experiments were performed up to 300 °C at 150–160 bars for five to six weeks. Bentonite was saturated with a 1900 ppm K-Ca-Na-Cl-bearing water with Cu-foils. Copper rapidly degrades into chalcocite (CuS2) and minor covellite (CuS) in the presence of H2S. Chalcocite growth and corrosion pit depths were measured for four different experimental runs yielding corrosion rates between 8.8 and 116 μm/yr depending on duration of experiment, brine composition, and clay type (bentonite vs. Opalinus Clay). Results of this research show that although pit-corrosion is demonstrated on Cu substrates, experiments show that the reactions that ensue, and the formation of minerals that develop, are extraordinarily slow. Finally, this supports the use of Cu in nuclide-containment systems as a possible engineered barrier system material.},

  doi          = {10.1016/j.jnucmat.2016.12.036},

  journal      = {Journal of Nuclear Materials},

  number       = ,

  volume       = 485,

  place        = {United States},

  year         = {Thu Dec 29 00:00:00 EST 2016},

  month        = {Thu Dec 29 00:00:00 EST 2016}

}

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