The solubility of hydrogen in zirconium and zirconium-oxygen solid solutions

Hall, Minette; Martin, S.; Rees, A. L. G.

doi:10.1039/tf9454100306

Cited by 48 publications

(23 citation statements)

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“…Apparently in this region either a hydride or a solid solution of the metal with hydrogen is produced. Both have been reported for zirconium (5,6). Presence of a hydride produced by cathodic treatment of zirconium has been previously reported (7).…”

Section: Id(1om)/i~(o5m) Of 07 Is In Reasonable Agreementmentioning

confidence: 83%

The Electrochemical Polarization of Zirconium in eutral Salt Solutions

Hackerman

Cecil

1954

J. Electrochem. Soc.

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Cathodic and anodic polarization curves of zirconium in neutral sodium chloride solution were determined at constant current densities between 3.5 X 10 -s and 3.5 X 10-3 amp/cm ~.In aerated 0.5M NaC1, the cathode reaction occurring below the oxygen limiting diffusion current of 2 X 10 -4 amp/cm 2 was reduction of 02 to OH-. At current densities above the diffusion wave, hydrogen was evolved. Change in salt concentration resulted in a slight shift of diffusion current due to change in oxygen solubility. In deaerated 0.5M chloride solution, the oxygen diffusion current decreased with decrease in oxygen concentration. The slope of the Tafel line obtained is 0.12, and the hydrogen overvoltage for this system is 0.83 volt at 1 ma/cmL Another wave occurred at 2 X 10 -6 amp/cm 2 and is explained as the reduction of a surface oxide layer on the metal.Anodically, zirconium dissolved in 0.5M NaC1. The dissolution potential, 0.15 volt, did not vary with current density. Commercial zirconium and pure hafnium also dissolved under similar conditions.In neutral sulfate solutions, zirconium was passive under anodic treatment. At current densities above 1 X 10 -3 amp/cm 2 the potential reached an apparently constant value in about ten minutes. After a period depending on current density, this was followed by a sudden increase in potential to 28.5 volts. This potential is a result of an IR drop across a surface layer of oxide.

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Section: Id(1om)/i~(o5m) Of 07 Is In Reasonable Agreementmentioning

confidence: 83%

The Electrochemical Polarization of Zirconium in eutral Salt Solutions

Hackerman

Cecil

1954

J. Electrochem. Soc.

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“…Later, a thorough investigation was made of the Zr-H system at pressures of 1-760 mm Hg from room temperature to 1050~ (5). Extrapolation of the data to low pressures, along with other solubilities calculated from diffusion studies in the range 400~176 were reported in a discussion of the properties of Zr-H alloys (1).…”

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confidence: 99%

Low-Pressure Solubility and Diffusion of Hydrogen in Zirconium

Mallett

Albrecht

1957

J. Electrochem. Soc.

130

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Low‐pressure solubilities were determined for H in α‐ and β‐Zr and in two Zr‐O alloys at 700°–1000°C and pressures of 0.1–4 µ Hg. The data followed Sieverts' law for each phase, and H solubility decreased with increasing temperature at a given pressure. Also, there was a slight increase in H solubility in α ‐Zr with increasing oxygen content. Diffusion coefficients for H in α‐Zr were obtained in the range 300°–600°C by analysis of prepared concentration gradients. In the range 600°–800°C, degassing coefficients were determined from rate of H evolution from Zr cylinders. Degassing coefficients were much lower than expected from diffusion theory, and it was concluded that the degassing was not a pure diffusion phenomenon. Terminal solubilities obtained from the gradient analysis were in good agreement with those found by previous investigators.

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“…The hydride rim disappears and the radial hydride distribution becomes uniform in the test specimens annealed at 873 K for 600 s and at 973 K for 60 s. The binary phase diagram of the zirconium-hydrogen system which was made using the data obtained by the Hall et al [14] is shown in Fig. 5.…”

Section: Hydride Redistribution and Morphology Changementioning

confidence: 99%

Hydride behavior in Zircaloy cladding tube during high-temperature transients

Nagase

2011

Journal of Nuclear Materials

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The solubility of hydrogen in zirconium and zirconium-oxygen solid solutions

Cited by 48 publications

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The Electrochemical Polarization of Zirconium in eutral Salt Solutions

The Electrochemical Polarization of Zirconium in eutral Salt Solutions

Low-Pressure Solubility and Diffusion of Hydrogen in Zirconium

Hydride behavior in Zircaloy cladding tube during high-temperature transients

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