cpomaemКоррозия: защита материалов и методы исследованийTitle in englishИФХЭ РАН10.61852/2949-3412-2025-3-2-68-81cpomaem-97Research ArticleСтатьиВозможность использования водного экстракта Cupressus macrocarpa (CME) как экологически чистого ингибитора коррозии алюминия в растворе соляной кислотыPotential of aqueous Cupressus macrocarpa extract (CME) as ecofriendly corrosion inhibitor against aluminum in HCl environmentЭйссаМ. Э.EissaM. E.

Химический факультет, Колледж наук.

Эр-Рияд 11623

Chemistry Department, College of Science.

Riyadh 11623

Эль-КаториЭ. Э.El-KatoriE. E.

Химический факультет, Колледж наук. Университет Новой долины.

Эль-Харга 72511; Ти-гар, 64001

Chemistry Department, Faculty of Science New Valley University.

El Kharga-72511; Thi-qar, 64001

Эль-ХоссаиниА.El-HossainyA.

Химический факультет, Факультет наук.

Мансура-35516

Chemistry Department, Faculty of Science.

Mansoura-35516

Эльх-ХоссаиниЭ. М.El-HossainyE. M.

Мансура-35516

Chemistry Department, Faculty of Science.

Mansoura-35516

ФаудаА. С.FoudaA. S.

Мансура-35516

Chemistry Department, Faculty of Science.

Mansoura-35516

asfouda@hotmail.comИсламский университет имама Мохаммада ибн Сауда (IMSIU)Саудовская АравияImam Mohammad Ibn Saud Islamic University (IMSIU)Saudi ArabiaУниверситет Новой долины; Иракский университет Аль-АйенРоссияNew Valley University; Al-Ayen Iraqi UniversityRussian FederationУниверситет МансураЕгипетMansoura UniversityEgypt202513072025022450Copyright © Эйсса М.Э., Эль-Катори Э.Э., Эль-Хоссаини А., Эльх-Хоссаини Э.М., Фауда А.С., 20252025Эйсса М.Э., Эль-Катори Э.Э., Эль-Хоссаини А., Эльх-Хоссаини Э.М., Фауда А.С.Eissa M.E., El-Katori E.E., El-Hossainy A., El-Hossainy E.M., Fouda A.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.cpmrm.ru/jour/article/view/97

Cupressus – один из нескольких родов вечнозеленых хвойных деревьев семейства Cupressaceae, имеющих общее название кипарис. Эффективность экстракта Cupressus macrocarpa (CME) в качестве ингибитора коррозии для Al в среде 1 M HCl была исследована с использованием гравиметрических методов (по потере массы образцов), потенциодинамической поляризации (ПДП), электрохимической импедансной спектроскопии (ЭИС) и электрохимической частотной модуляции (ЭЧМ). Химический состав CME замедляет скорость коррозии Al и демонстрирует высокую эффективность ингибирования. Кроме того, результаты исследования показали возрастание ингибирующей способности экстракта при различных концентрациях, времени погружения и температуре. Для описания адсорбционного поведения экстракта на поверхности Al было протестировано уравнение Темкина. Исследование ПДП показало, что экстракт СМЕ действует как ингибитор коррозии смешанного типа. Согласно ЭИС, сопротивление переноса заряда (Rct) возросла, а емкость двойного слоя (Cdl) снизилась. Экстракт адсорбируется на поверхности Al, охватывая большую площадь поверхности Al и, следовательно, ингибирующий эффект возрастает. Адсорбция экстракта на поверхности Al является спонтанной, согласно кинетическим и термодинамическим характеристикам, и стабильной. CME ингибирует коррозионный процесс на поверхности Al посредством физической или химической адсорбции. Согласно полученным данным, CME может применяться в качестве ингибитора коррозии для Al в 1 M HCl.

Cupressus is one of several genera of evergreen conifers within the family Cupressaceae that have the common name cypress. The efficiency of Cupressus macrocarpa extract (CME) as corrosion inhibitor for Al in 1 M HCl medium was carried out using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation techniques. The results prove that the chemical content of CME can inhibit the corrosion rate of Al and exhibit high inhibition efficiency. Also, the results showed variation in inhibition performance of the extract with varying concentrations, immersion time and temperature. Temkin was tested to describe the adsorption behavior of the extract on the Al surface. Potentiodynamic polarization study clearly revealed that extract acts as a mixed type of inhibitor. According to the EIS study’s findings, the charge transfer resistance (Rct) increased while the double layer capacitance (Cdl) decreased. The extract is adsorbed on the Al surface, covering larger area from the surface of Al and hence, %IE increases. The adsorption of the extract on the Al surface is spontaneous, according to kinetic and thermodynamic characteristics and stable. CME inhibits corrosion on the Al surface through physical and chemical adsorption. According to the findings, CME may be useful as a corrosion inhibitor for Al in 1 M HCl.

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The authors declare that there are no conflicts of interest present.