scholarly journals Electromagnetic field influence on the calcium carbonate crystallization in the iron ions Fe2+ presence in mineralized aqueous media

2021 ◽  
Vol 1889 (2) ◽  
pp. 022096
Author(s):  
S R Alimbekova ◽  
F G Ishmuratov ◽  
V V Nosov ◽  
A I Voloshin ◽  
R I Alimbekov ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Calcium Carbonate ◽  
Aqueous Media ◽  
Iron Ions ◽  
Field Influence

scholarly journals Influence of the electromagnetic field on the corrosion of low-carbon steel in aqueous mineralized media and on the crystallization of calcium carbonate in the presence of iron(II) ions

2021 ◽  
pp. 116-124
Author(s):  
S.R. Alimbekov ◽  
◽  
F.G. Ishmuratov ◽  
V.V. Nosov ◽  
A.I. Voloshin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Electromagnetic Field ◽  
Calcium Carbonate ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Low Carbon Steel ◽  
Iron Ions ◽  
Low Carbon ◽  
Near Surface ◽  
Salt Deposition

The influence of the electromagnetic field (EMF) on the corrosion of structural carbon steel in a 3% aqueous solution of sodium chloride in the presence of CO2 was studied. It is shown that the EMF increases the corrosion rate of steel by 1.13 times in a 3% aqueous solution of NaCl in the presence of CO2. When Ca2+ ions are added to the solution, the corrosion rate of steel decreases under the influence of an electromagnetic field. It is assumed that the formation of CaCO3 in the near-surface layer of the solution and its adsorption on the metal surface prevents the development of corrosion. The influence of the electromagnetic field generated in the frequency range from 100 to 200 kHz on the crystallization of CaCO3 from supersaturated aqueous solutions on the model system CaCl2 – NaHCO3 – FeSO4 is studied. It was found that Fe2+, rather than EMF, has a more significant effect on salt deposition. The efficiency of the effect of Fe2+ on the inhibition of salt deposition in the model of mineralized water CaCl2-NaHCO3 is 11.5% higher than when exposed to EMF. During the crystallization of CaCO3, the predominant formation of aragonite is observed. In the presence of iron ions and under the influence of EMF, there was a decrease in the formation of aragonite and an increase in the formation of calcite and vaterite. Keywords: electromagnetic field; corrosion; carbon steel; iron ions; scale deposition; crystallization; calcium carbonate.

scholarly journals Corrosion Protection of Q235 Steel Using Epoxy Coatings Loaded with Calcium Carbonate Microparticles Modified by Sodium Lignosulfonate in Simulated Concrete Pore Solutions

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1982
Author(s):  
Weilin Liu ◽  
Jiansan Li ◽  
Xiangqi Huang ◽  
Jinye Bi
Keyword(s):  
Calcium Carbonate ◽  
Corrosion Inhibitor ◽  
Aqueous Media ◽  
Mechanical Tests ◽  
Attenuated Total Reflection ◽  
Shielding Effect ◽  
Sodium Lignosulfonate ◽  
Epoxy Coatings ◽  
Pencil Hardness ◽  
Q235 Steel

In this study, calcium carbonate (CaCO3) microparticles having pH-sensitive properties were loaded with sodium lignosulfonate (SLS), a corrosion inhibitor. Scanning electron microscope (SEM), UV–VIS spectrophotometer (UV-vis), X-ray diffraction (XRD), and attenuated total reflection-Fourier-transform infrared spectroscopy (ATR-FTIR) were applied to evaluate the properties of the synthetic microparticles. This material could lead to the release of corrosion inhibitor under different pH conditions of the aqueous media. However, the extent of release of the corrosion inhibitor in the acidic media was higher, leading to enhanced shielding effect of the Q235 steel. These microparticles can serve as anti-corrosion additive for epoxy resin-coated Q235 steel. Electrochemical experiments were used to assess the anti-corrosive ability of the epoxy coatings in simulated concrete pore (SCP) solution, confirming the superior corrosion inhibition of the epoxy coating via incorporation of 5 wt % calcium carbonate microparticles loaded with SLS (SLS/CaCO3). The physical properties of coating specimens were characterized by water absorption, contact angle, adhesion, and pencil hardness mechanical tests.

scholarly journals Some Aspects of Mathematical Modeling of the Electromagnetic Field Influence on the Human Brain

2019 ◽  
Vol 3 (1) ◽  
pp. 12-16
Author(s):  
Alina Prigancová ◽  
Michal Hvoždara ◽  
Igor Túnyi ◽  
Yuriy Gorgo ◽  
Sergii Mamilov
Keyword(s):  
Mathematical Modeling ◽  
Electromagnetic Field ◽  
Human Brain ◽  
Field Influence

Effect of AC Electromagnetic Field on Zeta Potential of Calcium Carbonate

2008 ◽  
Author(s):  
S. Umeki ◽  
H. Shimabukuro ◽  
T. Watanabe ◽  
T. Kato ◽  
S. Taniguchi ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Calcium Carbonate ◽  
Zeta Potential

Microwave-assisted synthesis of CdSe quantum dots: can the electromagnetic field influence the formation and quality of the resulting nanocrystals?

Nanoscale ◽  
2012 ◽  
Vol 4 (23) ◽  
pp. 7435 ◽  
Author(s):  
Mojtaba Mirhosseini Moghaddam ◽  
Mostafa Baghbanzadeh ◽  
Andreas Keilbach ◽  
C. Oliver Kappe
Keyword(s):  
Quantum Dots ◽  
Electromagnetic Field ◽  
Microwave Assisted Synthesis ◽  
Cdse Quantum Dots ◽  
Microwave Assisted ◽  
Field Influence

scholarly journals Eco-friendly processes for the synthesis of amorphous calcium carbonate nanoparticles in ethanol and their stabilisation in aqueous media

2022 ◽  
Author(s):  
Lauriane Chuzeville ◽  
Frank Boury ◽  
David Duday ◽  
Resmi Anand ◽  
Enzo Moretto ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Mass Concentration ◽  
Aqueous Media ◽  
Nanoparticle Synthesis ◽  
Concentration Increase ◽  
Amorphous Calcium Carbonate ◽  
Final Mass

New understandings in the amorphous calcium carbonate nanoparticle synthesis lead to a final mass concentration increase by a factor of 3.5. The stabilisation in aqueous media is achieved by a 2-minute scalable process using bio-sourced stabilisers.

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