Algerian Journal of Engineering and Technology

Yazarlar: Sid Ahmed AMZERT, Fahd ARBAOUI, Mohamed Nadir BOUCHERIT, Noureddine SELMI, Salah HANINI

Konular:-

Anahtar Kelimeler:Oxygen reduction reaction,Stainless steel 316L,CaCO3 deposit,XRD,SEM

Özet: In this paper we study the effect of the hardness, the rotation speed, the temperature and the cathodic polarization on calcium carbonate scale deposit on rotating stainless steel electrode using electrochemical techniques. The scale deposit was investigated by X-Ray diffraction, scanning electron microscope, Infra-red spectroscopy and electrochemical impedance spectroscopy (EIS). The electrochemical results show that the Oxygen Reduction Reaction (ORR), which is responsible of CaCO3 electrodeposition, takes place with 4 electrons at low rotation speed and 2 electrons at high rotation speed. The morphology of the CaCO3 deposit shows that the crystals formed in the center of the electrode have small sizes compared to those of the periphery. Whatever the hydrodynamic or thermodynamic conditions, the Calcite form remains predominant. Other forms appear in particular conditions: at high temperature the aragonite form and at high cathodic polarization the vaterite form. Cite as: Amzert SA, Arbaoui F, Boucherit MN, Selmi N, Hanini S. Electrodeposition of CaCO3 on stainless steel 316 L substrate: influence of thermal-hydraulics and electrochemical parameters. Alger. J. Eng. Technol. 2021, 4:90-98.  http://dx.doi.org/10.5281/zenodo.4695955 References

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