CHEIKH Mokrani
مقراني الشيخ
cheikh.mokrani@univ-msila.dz
07 90 40 58 77
- Departement of Chemistry
- Faculty of Sciences
- Grade MCA
About Me
Location
Msila, Msila
Msila, ALGERIA
Code RFIDE- 1961-05-09 00:00:00
-
CHEIKH Mokrani birthday
- 2024-05-07
-
2024-05-07
Corrosion behaviour of special alloy Fe-Mn on saline medium
Corrosion is a costly and hazardous process. It costs billions of dollars each year to replace corroded machinery, structures, and parts. Metals are particularly challenging to work with due to the natural process of corrosion, especially in saline or alkaline environments. Efforts to solve this issue have been ongoing, emphasizing the need of realistic solutions. Iron corrosion, which is harmful and promotes the degradation of metal structures, is especially common in saline situations. As a result, research in this field is critical to the development of innovative materials and methods for ensuring metal life and durability by effectively avoiding corrosion. In this study, we chose to control the corrosion of Iron-Manganese (Fe-Mn) alloys in 3.5% of NaCl at room temperature as function of pH. The methods employed in this work were weight-loss (WL), Tafel polarization curves and electrochemical impedance spectroscopy (EIS). The surface morphology of the Fe-Mn alloy surface was examined by optical microscopy. Results show that the corrosion rate increase with the decrease of pH value, the weight-loss exhibits a similar tendency, Nyquist and Bode demonstrate that the corrosion processes of the Fe-Mn alloy is complex and depends on the pH value of corrosive medium.
Citation
Sarra Merabet , Cheikh MOKRANI , ,(2024-05-07), Corrosion behaviour of special alloy Fe-Mn on saline medium,The 2nd National Chemistry Conference (2CNC@2024),M'sila
- 2023
-
2023
The influence of temperature on the corrosion of the special alloy Fe-Mn in a saline media
Corrosion is a natural phenomenon that happens when minerals react chemically with their surroundings. It may cause significant material and human losses. Seawater is the most challenging and aggresive corrosion-causing medium out of these factors, which also include humidity, temperature, acid rain, etc. In our study, we prepared a medium similar to seawater that contains 3.5% sodium chloride, then we concentrated on how the temperature range of 10 to 45 ºC affected the corrosion mechanism of an iron-manganese alloy (Fe-Mn). The methods employed in this work were Tafel polarization curves and electrochemical impedance spectroscopy (EIS). The surface morphology of the Fe-Mn alloy surface was examined by scanning electron microscope (SEM).The results reveal that the open circuit potential (OCP) of Fe-Mn alloy shifted negatively with increasing temperature, suggesting the start of corrosion processes. The corrosion potential degenerates more quickly at higher temperatures, which is associated to a faster corrosion rate. The EIS indicated that the corrosion resistance of Fe-Mn alloy decreased at high temperatures, and tafel curves demonstrated that the corrosion current density Jcorr increased in high temperatures. The surface of the Fe-Mn alloy was covered by a huge number of the accumulated corrosion products as the temperature climbed, the roughness of the steel increased, and the volume and size of corrosion products dramatically increased.
Citation
Sarra Merabet , Cheikh MOKRANI , ADMIN Admin , ,(2023), The influence of temperature on the corrosion of the special alloy Fe-Mn in a saline media,THE 3rd NATIONAL CONFERENCE ON APPLIED PHYSICS & CHEMISTRY,Laghouat
- 2022
-
2022
Effect of immersion time on corrosion of Fe-Mn alloy in salin meduim
Corrosion is both dangerous and costly. Billions of dollars are spent annually for the replacement of corroded structures, machinery, and components. Premature failure of bridges or structures due to corrosion can also result in human injury, loss of life, and collateral damage. Ferrous metals are regarded as the most widely used metals in many industrial fields which are produced in millions of tons annually across several countries in the world. Corrosion of ferrous metals in chloride medium is one of the major causes of durability problems of water, sewage, oil and gas distribution systems. In this study, we chose to control the corrosion of Iron-Manganese (Fe-Mn) alloys in 3.5% of NaCl at room temperature as function of immersion time. The methods employed in this work were weight-loss (WL), Tafel polarization curves and electrochemical impedance spectroscopy (EIS). The surface morphology of the Fe-Mn alloy surface was examined by optical microscopy. Results show that the open circuit potential shifts towards negative values during the first three days but between 3 to 15 days a slight change is observed. The weight-loss exhibits a similar tendency. The Tafel polarization curves demonstrate that the corrosion of the alloy is controlled by the dissolution iron. Nyquist and Bode demonstrate that the corrosion processes of the Fe-Mn alloy is complex and depends on the immersion times to the corrosive medium.
Citation
Sarra Merabet , Cheikh MOKRANI , ,(2022), Effect of immersion time on corrosion of Fe-Mn alloy in salin meduim,First Internatinal conference on Materials Science and Technology,Khenchela, Algeria
Default case...
- 2021
-
2021
Kinetic model for sulfate radical oxidation of bromothymol blue
The degradation kinetics of bromothymol blue (BBT) in the presence of heated potassium persulfate (KPS) in acidic medium (pH3) was studied. Based on our calculation and simulation methods, we determined, for the first time, the rate constant of the reaction of BBT with sulfate radicals (k6) at 60 °C. By carrying out several experiences at various conditions of concentrations and temperature, we obtain an average value of k6 equal to (3.3 ± 0.3) x 108 M-1 s-1 and an activation energy equal to18.84 kJ/mol. On the other hand, we have also calculated the rate constant of the BTB reaction with the hydroxyl radical at 60 °C, equal to (1.3 ± 1) x 1010 M-1 s-1. Finally, based on our simulation model, we predicted the dominant radical(hydroxyl or sulfate) at different values of pH.
Citation
Mokhtar DJEHICHE , Cheikh MOKRANI , Azzedine BENYAHIA , NEDJMA Lahmar , ,(2021), Kinetic model for sulfate radical oxidation of bromothymol blue,7th International Conference on Advancement in Science and Technology,international islamic university malaysia