Адсорбционное и пассивационное поведение медного сплава комплексами фталоцианинов в водном хлоридном растворе
https://doi.org/10.61852/2949-3412-2023-1-4-89-100
Аннотация
В работе исследованы адсорбционные и защитные свойства терафталанатриевой соли 4,5-октакарбоксифталоцианина на поверхности медного сплава МНЖ5–1 в нейтральном боратном буферном растворе. Терафтал подавляет активное анодное растворение сплава МНЖ5–1 в 0,01 М хлоридном буфере рН 7,40. Защитный эффект увеличивается при Син =1,2 мкмоль/л с 0,18 В до 0,35 В при 25 мкмоль/л. Энергия адсорбции (-Δ𝐺0𝑎,𝑚𝑎𝑥) терафтала на поверхности сплава МНЖ5–1 при Е=0,0 В равна 78,8 кДж/моль. Такое значение указывает на хемосорбцию ингибитора на поверхности электрод, которая происходит за счет атомов кислорода карбоксильных групп. Толщины адсорбированного слоя, определенные методами эллипсометрии ≈0,3 нм, что указывает на плоское расположение терафтала на поверхности.
Об авторах
Н. П. Андреева
ФГБУН «Институт физической химии и электрохимии им. А.Н. Фрумкина РАН (ИФХЭ РАН)»
Россия
Россия
119071
Ленинский просп., 31, корп. 4
Москва
М. О. Агафонкина
ФГБУН «Институт физической химии и электрохимии им. А.Н. Фрумкина РАН (ИФХЭ РАН)»
Россия
Россия
119071
Ленинский просп., 31, корп. 4
Москва
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Рецензия
Для цитирования:
Андреева Н.П., Агафонкина М.О. Адсорбционное и пассивационное поведение медного сплава комплексами фталоцианинов в водном хлоридном растворе. Коррозия: защита материалов и методы исследований. 2023;(4):89-100. https://doi.org/10.61852/2949-3412-2023-1-4-89-100
For citation:
Andreeva N.P., Agafonkina M.O. Adsorption and passivation behavior of copper alloy by phthalocyanine complexes in an aqueous chloride solution. Title in english. 2023;(4):89-100. (In Russ.) https://doi.org/10.61852/2949-3412-2023-1-4-89-100
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