Sustainable corrosion inhibitor derived from Moroccan oil shale: calcium acetate for steel protection
5 affiliations
- 1Laboratory of Engineering and Materials (LIMAT), Faculty of Science Ben M'Sick, Hassan II University, Boulevard Driss Harti, BP. 7955, Ben M'sick, Casablanca, Morocco
- 2Engineering and Durability of Materials Center, Moroccan Foundation for Advanced Science, Innovation and Research (MASCIR), Mohammed VI Polytechnic University (UM6P), Lot 660-Hay Moulay Rachid, Ben Guerir, 43150, Morocco; Institute of Applied Physics, Mohammed VI Polytechnic University (UM6P), Lot 660, Hay Moulay Rachid, Ben Guerir, 43150, Morocco
- 3Engineering and Durability of Materials Center, Moroccan Foundation for Advanced Science, Innovation and Research (MASCIR), Mohammed VI Polytechnic University (UM6P), Lot 660-Hay Moulay Rachid, Ben Guerir, 43150, Morocco
- 4Materials Science, Energy and Nano-Engineering Department (MSN), College of Chemical Sciences and Engineering (CCSE), Mohammed VI Polytechnic University (UM6P), Lot 660, Hay Moulay Rachid, Ben Guerir, 43150, Morocco
- 5Materials Science, Energy and Nano-Engineering Department (MSN), College of Chemical Sciences and Engineering (CCSE), Mohammed VI Polytechnic University (UM6P), Lot 660, Hay Moulay Rachid, Ben Guerir, 43150, Morocco; Corresponding author.
Abstract
This study presents a sustainable route for producing calcium acetate from Moroccan Tarfaya oil shale and evaluates its performance as a corrosion inhibitor for steel in chloride-rich media. Calcium acetate was synthesized by reacting oil shale with acetic acid under optimized conditions of 2.5 M, 30 min, and a liquid-to-solid ratio of 10. The process achieved approximately 65.4% decarbonation and produced calcium acetate with a CaO content of 98.48%, close to that of commercial calcium acetate (98.98%). XRD, FTIR, TGA, and SEM analyses confirmed the formation of calcium acetate hydrate phases and their structural characteristics. Electrochemical measurements demonstrated significant corrosion inhibition in 3.5 wt% NaCl solution. Potentiodynamic polarization showed a decrease in corrosion current density from 23.2 μA for the blank to 2.3 μA at 10 −3 M inhibitor concentration, while EIS measurements indicated that 10 −5 M provided the most stable long-term protection. The polarization behavior indicates mixed-type inhibition with predominant cathodic character, associated with the formation of a protective surface film. These findings demonstrate the potential of Tarfaya oil shale as a low-cost calcium source for producing an environmentally friendly corrosion inhibitor.
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BibTeX
@article{foulah2026sustainable,
title = {{Sustainable corrosion inhibitor derived from Moroccan oil shale: calcium acetate for steel protection}},
author = {Houda Foulah and Abdelhalim Chaouki and Meriem Benali and Abdelhadi El Jaouhari and Mustapha Matrouf and Mina Oumam and Soumia Aboulhrouz},
journal = {Results in Chemistry},
year = {2026},
month = oct,
doi = {10.1016/j.rechem.2026.104002},
url = {https://doi.org/10.1016/j.rechem.2026.104002},
note = {CC BY},
}
RIS
TY - JOUR
TI - Sustainable corrosion inhibitor derived from Moroccan oil shale: calcium acetate for steel protection
AU - Houda Foulah
AU - Abdelhalim Chaouki
AU - Meriem Benali
AU - Abdelhadi El Jaouhari
AU - Mustapha Matrouf
AU - Mina Oumam
AU - Soumia Aboulhrouz
PY - 2026
DA - 2026/10/30
JO - Results in Chemistry
DO - 10.1016/j.rechem.2026.104002
UR - https://doi.org/10.1016/j.rechem.2026.104002
AB - This study presents a sustainable route for producing calcium acetate from Moroccan Tarfaya oil shale and evaluates its performance as a corrosion inhibitor for steel in chloride-rich media. Calcium acetate was synthesized by reacting oil shale with acetic acid under optimized conditions of 2.5 M, 30 min, and a liquid-to-solid ratio of 10. The process achieved approximately 65.4% decarbonation and produced calcium acetate with a CaO content of 98.48%, close to that of commercial calcium acetate (98.98%). XRD, FTIR, TGA, and SEM analyses confirmed the formation of calcium acetate hydrate phases and their structural characteristics. Electrochemical measurements demonstrated significant corrosion inhibition in 3.5 wt% NaCl solution. Potentiodynamic polarization showed a decrease in corrosion current density from 23.2 μA for the blank to 2.3 μA at 10 −3 M inhibitor concentration, while EIS measurements indicated that 10 −5 M provided the most stable long-term protection. The polarization behavior indicates mixed-type inhibition with predominant cathodic character, associated with the formation of a protective surface film. These findings demonstrate the potential of Tarfaya oil shale as a low-cost calcium source for producing an environmentally friendly corrosion inhibitor.
SN - 2211-7156
ER -