Mechanism of LDH Direct Growth on Aluminum Alloy Surface: A Kinetic and Morphological Approach | Sciact - CRIS-система Института катализа

Mechanism of LDH Direct Growth on Aluminum Alloy Surface: A Kinetic and Morphological Approach Научная публикация

Журнал

The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455

Вых. Данные

Год: 2021, Том: 125, Номер: 21, Страницы: 11687-11701 Страниц : 15 DOI: 10.1021/acs.jpcc.1c02281

Авторы

Bouali A.C. ¹ , Iuzviuk M.H. ² , Serdechnova M. ¹ , Yasakau K.A. ³ , Drozdenko D. ⁴ , Lutz A. ⁵ , Fekete K. ⁴ , Dovzhenko G. ⁶ , Wieland D.C.F. ⁷ , Terryn H. ⁵ , Ferreira M.G.S. ³ , Zobkalo I.A. ² , Zheludkevich M.L. ¹

Организации

1	Institute of Surface Science, Helmholtz Zentrum Hereon, 21502 Geesthacht, Germany
2	Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», Laboratory of Physics of Crystals, 188300 Gatchina, Russia
3	CICECO - Aveiro institute of materials, Dep. Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal
4	Faculty of Mathematics and Physics, Department of Physics of Materials, Charles University, 12116 Prague 2, Czech Republic
5	Research Group Electrochemical and Surface Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium
6	Institute of Materials Physics, Helmholtz Zentrum Hereon, 21502 Geesthacht, Germany
7	Institute of Metallic Biomaterials, Helmholtz Zentrum Hereon, 21502 Geesthacht, Germany

The growth of ZnAl layered double hydroxide (LDH) on the AA2024 surface was monitored using synchrotron high-resolution X-ray diffraction. Data were analyzed using the Avrami−Erofe’ev kinetic model. Accordingly, the LDH film growth is governed by a two-dimensional (2D) diffusion-controlled reaction with a zero nucleation rate. Additional methods, including ex situ atomic force microscopy/scanning Kelvin probe force microscopy (AFM/SKPFM) supported by in situ open-circuit potential (OCP) measurements together with scanning electron microscopy (SEM) and transmission electron microscopy with energy-dispersive X-ray spectroscopy (TEM/EDX) analysis, provided further insight into the different stages of the mechanism of LDH growth. Prior to the conversion coating formation, an intermediate layer is formed as a basis for the establishment of the LDH flakes. Moreover, a Cu-rich layer was revealed, which could contribute to the acceleration of LDH growth. The formed LDH layer does not show any cracks at the interface but presents minor irregularities in the structure, which could favor adhesion to subsequent organic coatings. The findings presented in this work provide an important insight to the corrosion performance of the LDH conversion coatings and the pathway to adopt for further optimization.

Bouali A.C. , Iuzviuk M.H. , Serdechnova M. , Yasakau K.A. , Drozdenko D. , Lutz A. , Fekete K. , Dovzhenko G. , Wieland D.C.F. , Terryn H. , Ferreira M.G.S. , Zobkalo I.A. , Zheludkevich M.L.
Mechanism of LDH Direct Growth on Aluminum Alloy Surface: A Kinetic and Morphological Approach
The Journal of Physical Chemistry C. 2021. V.125. N21. P.11687-11701. DOI: 10.1021/acs.jpcc.1c02281 WOS Scopus CAPlusCA OpenAlex

Поступила в редакцию:	14 мар. 2021 г.
Принята к публикации:	1 мая 2021 г.
Опубликована online:	19 мая 2021 г.
Опубликована в печати:	3 июн. 2021 г.

Web of science:	WOS:000661114000040
Scopus:	2-s2.0-85108096129
Chemical Abstracts:	2021:1109525
Chemical Abstracts (print):	175:13631
OpenAlex:	W3160037824

БД	Цитирований
Scopus	20
Web of science	20
OpenAlex	20