Electrochemical and XPS investigation of the corrosion behavior of Alloy 690 at high-temperature water

Duan, Zhengang; Arjmand, Farzin; Zhang, Lefu; Meng, Fanjiang; Abe, Hiroaki

doi:10.1007/s10008-015-2856-1

Cited by 20 publications

(17 citation statements)

References 29 publications

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“…Therefore, this XPS result confirms that zinc compounds containing Zn 2+ were formed under the test condition containing zinc. The binding energies of the components obtained from the deconvoluted XPS spectra are listed in Table 3 and were in good agreement with those in the literature [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ].…”

Section: Resultssupporting

confidence: 86%

Effects of Zinc Addition on the Corrosion Behavior of Pre-Filmed Alloy 690 in Borated and Lithiated Water at 330 °C

et al. 2021

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The purpose of this work is to quantify the effects of dissolved zinc cations on corrosion and release rates from a pre-filmed Alloy 690 steam generator tubing material that was subsequently exposed to water containing zinc. The corrosion tests were performed in circulating 2 ppm Li and 1000 ppm B water without and with 60 ppb zinc at 330 °C. Gravimetric analyses and oxide characterization revealed that the corrosion rates, release rates, and oxide thicknesses decreased by subsequent exposure of the pre-filmed Alloy 690 to zinc. These benefits are attributed to the formation of a chromium-rich inner oxide layer incorporating zinc.

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Section: Resultssupporting

confidence: 86%

Effects of Zinc Addition on the Corrosion Behavior of Pre-Filmed Alloy 690 in Borated and Lithiated Water at 330 °C

et al. 2021

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“…The O1s spectra of GCS@PPy/ L -cys are shown in Figure e(I). They consist of two sets peaks centered at 531.78 and 532.12 eV, attributed to the O1s of −SO x (37.7%) and −COOH (62.3%). , After adsorption of Cr(VI) (Figure e(II)), the O1s peak of chromate(VI) (HCrO 4 – , Cr 2 O 7 2– , and CrO 4 2– ) appeared at 530.09 eV, , while the O1s peak of −SO x moved to 531.49 eV, and its proportion increased to 70.2%. This confirms that −S–S– is further oxidized to -SO x by Cr(VI).…”

Section: Resultsmentioning

confidence: 99%

An Enhanced Reduction–Adsorption Strategy for Cr(VI): Fabrication and Application of L-Cysteine-doped Carbon@Polypyrrole with a Core/Shell Composite Structure

Peng

Guo

et al. 2020

Langmuir

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Reclamation and recycling of heavy metal ions can offer environmental protection and sustainable development. Here, we report the preparation of L-cysteine (L-cys)-doped glucose carbon sphere (GCS)@polypyrrole (PPy) composites (GCS@PPy/L-cys). The adsorption performance and mechanism of GCS@PPy/L-cys toward Cr(VI) from water were investigated in detail. The chromate enrichment on GCS@PPy is significantly facilitated by doping with L-cys, which prevents the oxidative collapse of the structure. This approach leads to many reduction–adsorption sites that reduce the highly hazardous Cr(VI) into less toxic Cr(III). More significantly, the composite can be reused to fabricate supercapacitors that avoid secondary pollution. This strategy offers high-efficiency treatment and sustainable utilization of hypervalent metals in water.

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“…Because there is a large amount of adsorbed oxygen and carbon on the outmost surface, the data were distorted at 0 s sputtering [ 5 ]. The sputtering time was 60 s, 840 s, and 1500 s. Table 2 shows the binding energy of targeted oxides or hydroxides [ 12 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ]. The peak of O 2− dominated throughout the sputtering progress, indicating that the oxide films were mainly oxides.…”

Section: Resultsmentioning

confidence: 99%

Crevice Corrosion Behavior of Alloy 690 in High-Temperature Aerated Chloride Solution

et al. 2022

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Crevice corrosion behavior of Alloy 690 in high-temperature aerated chloride solution was studied using a self-designed crevice device. The SEM, EDS, XRD, and XPS analyses results indicated that the oxide films outside the crevice consisted of Ni-Cr oxides containing a small amount of hydroxides, and the oxide films on crevice mouth consisted of a (Ni,Fe)(Fe,Cr)2O4 spinel oxides outer layer and a Cr(OH)3 inner layer, and the oxide films inside the crevice consisted of a α-CrOOH outer layer and a Cr(OH)3 inner layer. When crevice corrosion occurred, the hydrolysis of Cr3+ led to the formation of Cr(OH)3 inside the crevice, and caused the pH value of crevice solution to decrease, and Cl− migrated from outside the crevice into inside the crevice due to electrical neutrality principle and accumulation. When the water chemistry inside the crevice reached the critical value of active dissolution of metal, the active dissolution of metal inside the crevice occurred. In addition, (Ni,Fe)(Fe,Cr)2O4 spinel oxides on the crevice mouth were formed by the deposition of metal ions migrated from inside the crevice. The mechanism of crevice corrosion and the formation mechanism of oxide films at different regions were also discussed.

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Electrochemical and XPS investigation of the corrosion behavior of Alloy 690 at high-temperature water

Cited by 20 publications

References 29 publications

Effects of Zinc Addition on the Corrosion Behavior of Pre-Filmed Alloy 690 in Borated and Lithiated Water at 330 °C

Effects of Zinc Addition on the Corrosion Behavior of Pre-Filmed Alloy 690 in Borated and Lithiated Water at 330 °C

An Enhanced Reduction–Adsorption Strategy for Cr(VI): Fabrication and Application of L-Cysteine-doped Carbon@Polypyrrole with a Core/Shell Composite Structure

Crevice Corrosion Behavior of Alloy 690 in High-Temperature Aerated Chloride Solution

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