Effect of Surface Treatment on the Performance of LDH Conversion Films

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abstract

The preparation of layered double hydroxide (LDH) conversion films on aluminum alloy 2024 substrates is reported. The substrates were subjected to four different surface pre-treatments and the corresponding effect on the obtained films studied by scanning electron microscopy (SEM). The corrosion protection conferred to the underlying substrate was investigated by electrochemical impedance spectroscopy (EIS) and by the scanning vibrating electrode technique (SVET). The results show that the best performances are obtained when a laboratory mixed alkaline/acidic procedure or an industrial pre-treatment are applied before the LDH growth, which contribute for the increase of native oxide aluminum stability. (C) 2013 The Electrochemical Society. All rights reserved.

keywords

ACTIVE CORROSION PROTECTION; X-RAY-DIFFRACTION; MG ALLOY; RESISTANCE; INHIBITION; AA2024-T3; ALUMINUM

subject category

Electrochemistry; Materials Science

authors

Tedim, J; Zheludkevich, ML; Bastos, AC; Salak, AN; Carneiro, J; Maia, F; Lisenkov, AD; Oliveira, AB; Ferreira, MGS

our authors

no photo

Aleksey Lisenkov

Post-Doc Fellowship
no photo

André Raposo Bastos de Oliveira

Research Fellowship
foto Andrei Salak

Andrei Salak

Researcher
foto António Alexandre Cunha Bastos

António Alexandre Cunha Bastos

Researcher
foto Frederico Calheiros Maia

Frederico Calheiros Maia

PhD Student
foto João Tedim

João Tedim

Assistant Professor
foto Jorge Augusto Oliveira Carneiro

Jorge Augusto Oliveira Carneiro

Post-Doc Fellowship
foto Mário Guerreiro Silva Ferreira

Mário Guerreiro Silva Ferreira

Full professor
foto Mikhail Zheludkevich

Mikhail Zheludkevich

Invited Principal Researcher

Groups

3 - Carbon Materials, Composites and Functional Coatings
4 - Biorefineries, Biobased Materials and Recycling

Projects

Multifunctional nanostructured conversion films based on Layered Double hydroxides for corrosion protection of aeronautical structures (PTDC/CTM-MAT/1515/2012)
Centre for Research in Ceramics and Composite Materials - CICECO (LA0011: 2013-2014) (PEst-C/CTM/LA0011/2013)

acknowledgements

The authors thank FCT for funding through the project with reference PTDC/CTM-MAT/1515/2012 and CICECO (ref. PEst-C/CTM/LA0011/2013).

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Publication Details

type
Journal Article
year
2014
journal
ECS ELECTROCHEMISTRY LETTERS
volume
3
publisher
ELECTROCHEMICAL SOC INC
issn
2162-8726
issue
1
digital object identifier
10.1149/2.005401eel
web of science article identifier
WOS:000327761200006

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