Simulating Porous Magnetite Layer Deposited on Alloy 690TT Steam Generator Tubes

Jeon, Soon-Hyeok; Son, Young Kap; Choi, Wang-Kyu; Song, Geun Dong; Hur, Do Haeng

doi:10.3390/ma11010062

Cited by 9 publications

(4 citation statements)

References 16 publications

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“…lattice parameters of both phases, magnetite, and silver, are in the range of (0.838-0.847) nm and (0.408-0.411) nm respectively. These value are in agreement with other report (0.838-0.843) nm for magnetite 65,71,74 and (0.408-0.409) nm for silver. 71,75 The average crystallite size of MNPs was calculated using Scherrer's formula while the values of FWHM (Full Width at Half Maximum) were predicted using the fit line of diffraction peaks method.…”

Section: Resultssupporting

confidence: 94%

A Spin-Valve GMR Based Sensor with Magnetite@silver Core-Shell Nanoparticles as a Tag for Bovine Serum Albumin Detection

Wibowo

Juharni

Sabarman

et al. 2021

ECS J. Solid State Sci. Technol.

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The availability of rapid-portable instruments to monitor the bovine serum albumin (BSA) concentration is vital in the early detection of disease. In this research, an original biosensing method based on a spin-valve giant magnetoresistance as a transducer and magnetite@silver core-shell magnetic nanoparticles (MNPs) as a tag has been proposed for detecting BSA. The synthesized magnetite@silver MNPs tag size is ≈15 nm with ≈52 emu g −1 of saturation magnetization. This proposed biosensor performs rapid detection of BSA through the shifting of the switching magnetic field and the increasing of the output voltage. The effectivity of the sensor in monitoring the BSA concentration was shown by a strong linear correlation with ≈0.06 mV/(mg/ml) of the sensitivity and ≈0.44 mg ml −1 of the detection limit. Moreover, the measurement result can be acquired rapidly up to 1 min with low external magnetic field assistance. Therefore, this biosensing technique can be promoted as a real-time portable biosensor.

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Section: Resultssupporting

confidence: 94%

A Spin-Valve GMR Based Sensor with Magnetite@silver Core-Shell Nanoparticles as a Tag for Bovine Serum Albumin Detection

Wibowo

Juharni

Sabarman

et al. 2021

ECS J. Solid State Sci. Technol.

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“…60696. For Fe 3 O 4 , the tabular value for constant a varies from 8.33 [29] to 8.432 Å [30]. Here, the lattice constant was within this range.…”

Section: X-ray Difraction Analysismentioning

confidence: 77%

The Size Dependence of Microwave Permeability of Hollow Iron Particles

Artemova

Maklakov

Osipov

et al. 2022

Sensors

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Hollow ferromagnetic powders of iron were obtained by means of ultrasonic spray pyrolysis. A variation in the conditions of the synthesis allows for the adjustment of the mean size of the hollow iron particles. Iron powders were obtained by this technique, starting from the aqueous solution of iron nitrate of two different concentrations: 10 and 20 wt.%. This was followed by a reduction in hydrogen. An increase in the concentration of the solution increased the mean particle size from 0.6 to 1.0 microns and widened particle size distribution, but still produced hollow particles. Larger particles appeared problematic for the reduction, although admixture of iron oxides did not decrease the microwave permeability of the material. The paraffin wax-based composites filled with obtained powders demonstrated broadband magnetic loss with a complex structure for lesser particles, and single-peak absorption for particles of 1 micron. Potential applications are 5G technology, electromagnetic compatibility designs, and magnetic field sensing.

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“…Recently, many investigations on the galvanic effect by magnetite on the corrosion behavior of secondary coolant system materials such as nickel-based alloys [4][5][6] and carbon steel [7][8][9] have been reported. It is well known that the SG deposits mainly consist of magnetite and are porous in nature [10,11]. Unlike hematite, magnetite has a high electrical conductivity of 0.025 µs/cm at room temperature [12].…”

Section: Introductionmentioning

confidence: 99%

Micro-Galvanic Corrosion of Steam Generator Materials within Pores of Magnetite Flakes in Alkaline Solutions

Jeon

Song

Hur

2018

Metals

Self Cite

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In secondary coolant system of the pressurized water reactors, the reduced corrosion products such as metallic Cu and Pb particles were accumulated in the pores of the magnetite flakes and electrically contacted to the steam generator materials. The micro-galvanic corrosion behavior of steam generator materials (steam generator tube materials: Alloy 600 and Alloy 690, steam generator tube sheet materials: SA508 Gr.3) contacted to the corrosion products (magnetite, Cu, and Pb) was investigated in an alkaline solution. The steam generator materials considered in this study were all the anodic elements of the galvanic pair because their corrosion potentials were lower than those of the corrosion products. The corrosion rate of the steam generator materials was increased by the galvanic coupling with the each corrosion products, and was more accelerated with increasing the area ratio of the corrosion products to the steam generator materials. Among the corrosion products, Cu has the largest galvanic effect on steam generator materials in the pores when area ratio of cathode to anode is 10.

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Simulating Porous Magnetite Layer Deposited on Alloy 690TT Steam Generator Tubes

Cited by 9 publications

References 16 publications

A Spin-Valve GMR Based Sensor with Magnetite@silver Core-Shell Nanoparticles as a Tag for Bovine Serum Albumin Detection

A Spin-Valve GMR Based Sensor with Magnetite@silver Core-Shell Nanoparticles as a Tag for Bovine Serum Albumin Detection

The Size Dependence of Microwave Permeability of Hollow Iron Particles

Micro-Galvanic Corrosion of Steam Generator Materials within Pores of Magnetite Flakes in Alkaline Solutions

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