Corrosion of copper in pure O 2 -free water?

Hedin, A.; Johansson, Adam Johannes; Lilja, Christina; Boman, Mats; Berastegui, P.; Berger, Rolf; Ottosson, Mikael

doi:10.1016/j.corsci.2018.02.008

Cited by 55 publications

(34 citation statements)

References 44 publications

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“…Copper has a face-centered cubic (FCC) lattice structure and low stacking fault energy. Slip of dislocations occurs on close-packed {111} planes in three close-packed [11 apart (see Figure 6a). Four {111} planes and three [110] slip directions in each plane result in 12 slip systems.…”

Section: Deformation Of Crystalline Materials 21 Deformation Of Singmentioning

confidence: 99%

“…The ultimate tensile strength is also drastically reduced from >300 MPa to <270 MPa. In addition to reduction in strength, CERT under continuous hydrogen charging shows a remarkable reduction of elongation to fracture from [9][10][11][12][13] These values may be compared to the requirement of 240 MPa for yield strength, 370 MPa for ultimate tensile strength, and 12 % for elongation to fracture of the cast iron [3]. The ultimate tensile strength of the studied cast iron tested in air and distilled water does not meet the requirement most likely due to the thin plate shape of the tensile specimens.…”

Section: Constant Extension Rate Tests and Constant Load Tests [Iv]mentioning

confidence: 99%

“…Sustained corrosion of copper in O2-free water has also been speculated, but it seems unlikely that such a corrosion mechanism exists [11].…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen effects on mechanical performance of nodular cast iron

2019

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The KBS-3 method for long-term disposal of spent nuclear fuel is designed with an external self-standing copper shell, which provides the most important barrier against corrosion and escape of radionuclides, and an internal nodular cast iron insert, which provides the load-bearing structure against external loads. The material intended for the load-bearing insert is ferritic nodular cast iron EN 1563 grade EN-GJS-400-15U. In this paper, hydrogen uptake and sensitivity to hydrogen-induced cracking of the cast iron were studied using tensile testing under continuous electrochemical charging in 1 N H2SO4 solution. Hydrogen uptake was measured by using the thermal desorption method. It was found that the hydrogen desorption profile manifests three distinct peaks at initial locations of 400, 500, and 700 K with a heating rate of 6 K/min. Plastic deformation results in a remarkable increase of the 400 K peak, which indicates hydrogen uptake during deformation. In the constant extension rate tests (CERT) and the constant load tests (CLT), electrochemical hydrogen charging reduced markedly the elongation to fracture and time to fracture, respectively. In CLT, hydrogen charging increased dramatically the creep rate at the applied load of about 0.7 yield stress. Ligaments between the graphite nodules exhibit brittle cleavage facets in the presence of hydrogen, while the ligaments show a characteristic ductile appearance of shear and small dimples when testing in air or distilled water. The obtained results are discussed in terms of the known mechanisms of hydrogen-induced cracking and the role of the graphite nodules in the embrittlement of ductile cast iron.

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Section: Deformation Of Crystalline Materials 21 Deformation Of Singmentioning

confidence: 99%

Section: Constant Extension Rate Tests and Constant Load Tests [Iv]mentioning

confidence: 99%

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Hydrogen effects on mechanical performance of nodular cast iron

2019

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“…The operation license application will be submitted in 2020, the repository being sealed up to 2120. [23][24][25][26][27] Although the well-established thermodynamic data of copper lead to the expectation that it will corrode to a very limited extent in a closed system 2,3,[11][12][13][14][19][20][21]28 and that this kind of canisters will protect the SNF against corrosion in a stable form during very long times, [4][5][6]9,15,16,23,25,[42][43][44][45] the corrosion processes increase upon oxic and humid conditions and high temperatures and pressures. Furthermore, the experiments carried out in the presence of high radiation elds 18,46 show that the dissolution of copper and the rate of formation of oxide layers increase upon radiation signicantly, and that aqueous radiation chemistry is not the only process driving the corrosion of copper in these systems.…”

Section: Introductionmentioning

confidence: 99%

Structural, mechanical, spectroscopic and thermodynamic characterization of the copper-uranyl tetrahydroxide mineral vandenbrandeite

et al. 2019

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“…When copper is exposed to air for a longer time, then copper reacts with carbon dioxide and water in the air to form a green coating of basic copper carbonate on the surface of the object. The formation of this green coating on the surface of a copper object is the cause for corrosion [33]. Green coating of basic copper carbonate is a mixture of copper carbonate and copper hydroxide, CuCO 3 , Cu (OH) 2 .…”

Section: Results From Corrosion Testingmentioning

confidence: 99%

Finite Element Modeling and Mechanical Testing of Metal Composites Made by Composite Metal Foil Manufacturing

Butt

Ghorabian

Mohaghegh

et al. 2019

JMMP

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Foils of aluminum 1050 H14 ½ hard temper and 99.9% copper with 500-micron thickness have been used to manufacture similar and dissimilar composites by composite metal foil manufacturing (CMFM). The metal foils are bonded to each other using a special 80% zinc and 20% aluminum by weight brazing paste. A 3D finite element model has been developed to numerically analyze the time required to heat the metal foils so that a strong bond can be developed by the paste. The numerical simulations run in ANSYS 19.1 have been validated through experiments and rectangular layered composite products have been developed for flexural testing. The flexural test results for layered Al and Al/Cu composites are compared with solid samples of Al 1050 and 99.9% pure copper made by subtractive method. The results show that the layered Al composite is 5.2% stronger whereas the Al/Cu sample is 11.5% stronger in resisting bending loads compared to a solid Al 1050 sample. A higher bend load indicates the presence of a strong intermetallic bond created by the brazing paste between the metal foils. Corrosion testing was also carried out on the composite samples to assess the effect of corrosion on flexural strength. The tests revealed that the composites made by CMFM are not affected by galvanic corrosion after 7 days of testing and the flexural loads remained consistent with composites that were not immersed in a solution of distilled water and NaCl.

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Corrosion of copper in pure O 2 -free water?

Cited by 55 publications

References 44 publications

Hydrogen effects on mechanical performance of nodular cast iron

Hydrogen effects on mechanical performance of nodular cast iron

Structural, mechanical, spectroscopic and thermodynamic characterization of the copper-uranyl tetrahydroxide mineral vandenbrandeite

Finite Element Modeling and Mechanical Testing of Metal Composites Made by Composite Metal Foil Manufacturing

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