Nickel boride (NiB) as an inhibitor for an IGSCC of Alloy 600 and its applicability

Yi, Yongsun; Eom, Sung Ho; Kim, Hong-Pyo; Kim, Joungsoo

doi:10.1016/j.jnucmat.2005.08.011

Journal of Nuclear Materials

2005

DOI: 10.1016/j.jnucmat.2005.08.011

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Nickel boride (NiB) as an inhibitor for an IGSCC of Alloy 600 and its applicability

Yongsun Yi

Sung Ho Eom

Hong-Pyo Kim

et al.

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Cited by 7 publications

(1 citation statement)

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“…Combined with Reaction (4), the dissolution process of Cr can also be written as follows: Fd-3m (227) a = b = c = 0.8379 α = b = g = 90 PDF 34-0140 NiCrFeO 4 F a = b = c = 0.8335 α = b = g = 90 PDF 52-0068…”

mentioning

confidence: 99%

Comparison of Corrosion Resistance of UNS N06690TT and UNS N08800SN in Simulated Primary Water with Various Concentrations of Dissolved Oxygen

Wang¹,

Li²,

Huang³

et al. 2014

CORROSION

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Corrosion behaviors of UNS N06690TT and N08800SN in simulated pressurized water reactor (PWR) primary water containing three concentrations of dissolved oxygen (DO) was studied by open-circuit potential (OCP), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). These results have shown that DO in simulated PWR primary water produces a strong effect on Cr dissolution. At DO < 0.01 ppm, the electrochemical impedance of N06690TT at low frequency gradually increases and becomes larger than that of N08800SN, and N06690TT shows slightly better corrosion resistance than N08800SN. At DO ≥ 0.1 ppm, the electrochemical impedance of N06690TT at low frequency rapidly decreases and becomes lower than that of N08800SN with the increase of immersion time; N08800SN shows much better corrosion resistance than N06690TT. The spinel oxides NiFe 2 O 4 or Fe 3 O 4 can form in the inner oxide layer on N08800SN due to relatively balanced ratio of Fe, Ni, which leads to the relatively stable corrosion resistance. Therefore, when DO in PWR primary water is 0.1 ppm or more, it is more suitable to choose N08800SN rather than N06690TT as the steam generator (SG) tubing materials.KEY WORDS: dissolved oxygen, electrochemical impedance spectroscopy, pressurized water reactor primary water, UNS N06690, UNS N08800

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mentioning

confidence: 99%

Comparison of Corrosion Resistance of UNS N06690TT and UNS N08800SN in Simulated Primary Water with Various Concentrations of Dissolved Oxygen

Wang¹,

Li²,

Huang³

et al. 2014

CORROSION

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Stress corrosion cracking of alloy 600 in an aqueous solution containing lead oxide

Kim

Hwang

et al. 2010

Met. Mater. Int.

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The stress corrosion cracking (SCC) behavior of Alloy 600 was studied in aqueous solutions containing lead. Electrochemical polarization and current transient experiments were performed at 315°C in a 40% sodium hydroxide solution to assess the effect of lead on a passive film formed on Alloy 600. The influences of the alloy microstructure and the addition of an inhibitor to the environments on lead-induced SCC were investigated using C-ring and slow strain-rate tensile (SSRT) tests in demineralized high-purity water and caustic solutions containing PbO at 315°C. The surface films on Alloy 600 were examined using Auger electron spectroscopy (AES) and energy dispersive x-ray spectroscopy (EDXS). The PbO markedly accelerated SCC of Alloy 600 in the caustic solution and the high-purity water at 315°C. The addition of nickel boride (NiB) or cerium boride (CeB6) to the test solutions decreased the susceptibility of Alloy 600 to SCC. Thermally treated Alloy 600 (Alloy 600 TT) tended to crack in a transgranular mode, while the solution-annealed Alloy 600 (Alloy 600 SA) tended to crack in an intergranular mode in water containing PbO.

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Corrosion behavior for Alloy 690 and Alloy 800 tubes in simulated primary water

Wang

Han

et al. 2013

Corrosion Science

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Nickel boride (NiB) as an inhibitor for an IGSCC of Alloy 600 and its applicability

Cited by 7 publications

References 8 publications

Comparison of Corrosion Resistance of UNS N06690TT and UNS N08800SN in Simulated Primary Water with Various Concentrations of Dissolved Oxygen

Comparison of Corrosion Resistance of UNS N06690TT and UNS N08800SN in Simulated Primary Water with Various Concentrations of Dissolved Oxygen

Stress corrosion cracking of alloy 600 in an aqueous solution containing lead oxide

Corrosion behavior for Alloy 690 and Alloy 800 tubes in simulated primary water

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