Anti-corrosion PEO-coatings impregnated with corrosion inhibitors on AMg3 alloy

Мұқаба

Дәйексөз келтіру

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Рұқсат жабық Тек жазылушылар үшін

Аннотация

Protective coating with microtubular structure was formed by plasma electrolytic oxidation on aluminum alloy AMg3 (Al–Mg system) in tartrate-fluoride electrolyte. This protective layer was additionally modified using azole group corrosion inhibitors (1,2,4-triazole, benzotriazole) and polymer (polyvinylidene fluoride). The morphology, composition, corrosion mechanism and protective properties of the formed coatings were studied.

Толық мәтін

Рұқсат жабық

Авторлар туралы

A. Gnedenkov

Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: asg17@mail.com
Ресей, Vladivostok

S. Sinebryukhov

Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences

Email: asg17@mail.com
Ресей, Vladivostok

Ya. Kononenko

Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences

Email: asg17@mail.com
Ресей, Vladivostok

S. Gnedenkov

Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences

Email: asg17@mail.com
Ресей, Vladivostok

Әдебиет тізімі

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Әрекет
1. JATS XML
Жүктеу
2. Fig. 1. Stages of formation of CP and GP.

Жүктеу (438KB)
Метадеректер
3. Fig. 2. Data of SEM-EDS analysis of the morphology and elemental composition of the base PEO coating (a) and KP-T-24 (b). The distribution of elements at three points of the cross section of the KP-T-24 and KP-B-24 samples (c) is shown. The arrow shows the place on the KP of KP-T-24 (as an example) where the EDS spectra were recorded.

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4. Fig. 3. Image of the studied area of the sample KP-B-24 (a) and KP-T-24 (b) 2D map of the distribution of benzotriazole (a) and 1,2,4-triazole (b), Raman spectrum of benzotriazole powder (a) and 1,2,4-triazole (b), as well as Raman spectra of the surface areas corresponding to areas with low (1) and high (2) inhibitor content. The spectra of benzotriazole (3) and 1,2,4-triazole (4) powder are shown.

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Метадеректер
5. Fig. 4. Nyquist (a1, b1) and Bode (a2, b2), (a3, b3) diagrams for samples with 1,2,4-triazole– (a) and benzotriazole-containing coatings (b) after 1 h of exposure in a 3.5% NaCl solution. The studied samples were: PEO, KP-T-0.5/1/2/24 and KP-B-0.5/1/2/24 (1, 2/3/4/5, 6/7/8/9, respectively)

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6. Fig. 5. Nyquist and Bode plots for KP without inhibitor and two types of GP after 1 h of exposure in 3.5% NaCl solution. The studied samples were: KP-P, GP-T-24-P and GP-B-24-P (1, 2, 3, respectively).

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Метадеректер
7. Fig. 6. (a) SVET maps and optical images of scanned areas of samples with different types of coatings. (b) 3D maps of the intensity of local electrochemical activity of the samples. The studied samples were: PEO, KP-B-24 and KP-T-24 (1, 2, 3, respectively).

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Метадеректер
8. Fig. 7. SIET maps of pH distribution and optical images of scanned areas of samples with different types of coatings. The studied samples were: PEO, KP-B-24 and KP-T-24 (1, 2, 3, respectively).

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9. Fig. 8. Mechanism of corrosion protection of an aluminum alloy sample with an azole-containing PEO layer in the presence of chloride ions. Benzotriazole was used as an example of the action of a corrosion inhibitor.

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