Effect of laser treatment of unalloyed steel on the efficiency of benzotriazole as a corrosion inhibitor in a neutral medium

Reshetnikov, S.M.; Pisareva, T.A.; Kharanzhevsky, E.V.; Gil’mutdinov, F.Z.; Borisova, E.M.

Авторы: Reshetnikov S.M., Pisareva T.A., Kharanzhevsky E.V., Gil’mutdinov F.Z., Borisova E.M.
Журнал: International Journal of Corrosion and Scale Inhibition
Том: 9
Номер: 3
Год издания: 2020
Издательство: Некоммерческое партнерство коррозионистов "Вакор"
Местоположение издательства: Москва
Первая страница: 1113
Последняя страница: 1120
DOI: 10.17675/2305-6894-2020-9-3-21
Аннотация: The effect of laser irradiation on the corrosion-electrochemical behavior of samples made of low-carbon unalloyed steel in borate buffer solution at pH 7.4 was studied. The modes of laser irradiation were determined (laser irradiation power 20 W; pulse frequency 100 kHz; line width of the trajectory of the laser beam 50 nm; scanning speed 350 (sample 2), 200 (sample 3), or 300 (sample 4) mm/s) ensuring the transition of steel to a passive state and a decrease in the overall rate of anodic dissolution of the metal. Laser irradiation of the samples was carried out in the air atmosphere. After laser treatment, some samples were studied in the same solution with addition of benzotriazole as a corrosion inhibitor. This inhibitor was chosen due to the fact that, like other azoles, it can be present in solution in the form of the initial molecules as well as in protonated form. It has been found that the nanoscale phases created by laser treatment decrease the surface oxidation rate under anodic polarization due to facilitation of transition to the passive state and thus favor an increase in the inhibitor efficiency. The results of XPS and microscopic studies show that laser surface treatment results in the formation of various types of adsorption centers. The assumption is substantiated that the adsorption centers after laser irradiation can be represented by various forms of iron oxides, including nonstoichometric, chemisorbed oxygen, as well as areas of nonoxidized (zero-valent) iron. Depending on the type of adsorption centers, benzotriazole molecules or possible protonation products can be adsorbed with formation of adsorption bonds of various nature.
Добавил в систему: Гильмутдинов Фаат Залалутдинович

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Effect of laser treatment of unalloyed steel on the efficiency of benzotriazole as a corrosion inhibitor in a neutral mediumстатья

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