Effects of the solution temperature and the pH on the electrochemical properties of the surface oxide films formed on Alloy 600

Kim, Dong-Jin; Kwon, Hyuk-Chul; Kim, Hong Pyo

doi:10.1016/j.corsci.2008.01.008

Cited by 71 publications

(22 citation statements)

References 9 publications

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“…5. The analogous differences of the surface morphologies on 316L SS and nickel-based alloys are also observed by SEM and XPS analyses in Zn-free high temperature water environments with pH value range from 5 to 8 [2,37]. The surface films consisting of coarse crystals form on SSs in the Zn-free solution, while much thinner films with fine stable crystals form in the Zn-injected solution [11,25,35].…”

Section: Modified Duplex-layer Oxide Model Including Ph Effectsmentioning

confidence: 73%

Effects of pH value on characteristics of oxide films on 316L stainless steel in Zn-injected borated and lithiated high temperature water

Liu

Han

2014

Corrosion Science

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Section: Modified Duplex-layer Oxide Model Including Ph Effectsmentioning

confidence: 73%

Effects of pH value on characteristics of oxide films on 316L stainless steel in Zn-injected borated and lithiated high temperature water

Liu

Han

2014

Corrosion Science

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“…However, when the Cr content is increased in the alloy, Cr is incorporated into the oxide, enhancing the oxide passivity and decreasing the FAC rate and roughness. It is [2,3] that Cr oxide is more passive than Fe oxide, and its application as corrosion resistant treatment such as stainless steel is widely used. It was also reported [8] that the Cr is enriched in the oxide over time because the Cr solubility is lower than that of the Fe in the solution.…”

Section: Resultsmentioning

confidence: 99%

“…Because ion transport is directly linked to the oxide property such as the thickness, chemical composition and porosity, there are numerous studies on the oxidation behavior in an exposed environment [2][3][4][5][6]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of Steel With Cr Content and Water Flow Rate

Kim¹,

Kim²,

Shin³

et al. 2017

Archives of Metallurgy and Materials

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Fast water flow facilitates ferrous ion transport leading to flow accelerated corrosion (FAC) of carbon steel and the possibility of a large accident through a failure of a secondary pipe in a nuclear power plant. Ion transport is directly linked to oxide properties such as the thickness, chemical composition and porosity. This work deals with a precise observation of the cross section of the corroded specimen focusing on an oxide passivity and its thickness using SEM (scanning electron microscope) and TEM (transmission electron microscope) as well as an apparent weight loss and a surface observation for the specimens corroded using a rotating cylindrical electrode autoclave system in pure water of pH 7 at 150°C having dissolved oxygen below 1 ppb within a flow rate range of 0 to 10 m/s. The Cr content in steel was changed from 0.02 to 2.4 wt%. Increasing the Cr content in the alloy, the FAC rate and oxide thickness decreased. The oxide porosity tends to decrease with the Cr content and immersion time owing to the development of Cr containing oxide. The oxidation behavior is not changed with the immersion time.

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“…Therefore, the current in a passive range is mainly due to the processes of film formation and corrosion/film dissolution. It has also been reported that the measured current in the passive region of a potentiodynamic curve is closely related to the stability of the passive film rather than the thickness of the oxide formed on Alloy 600 [9].…”

Section: Electrochemical Polarization and Current Transient Testsmentioning

confidence: 94%

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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Effects of the solution temperature and the pH on the electrochemical properties of the surface oxide films formed on Alloy 600

Cited by 71 publications

References 9 publications

Effects of pH value on characteristics of oxide films on 316L stainless steel in Zn-injected borated and lithiated high temperature water

Effects of pH value on characteristics of oxide films on 316L stainless steel in Zn-injected borated and lithiated high temperature water

Oxidation Behavior of Steel With Cr Content and Water Flow Rate

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

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