Anti-corrosion; Zinc alloys coated steel; Zn–Al hydrotalcite conversion films; Al hydrotalcite; Alloy coated steel; Anti-corrosion property; Conversion film; Hot dip galvanized steels; Hydrotalcites; Zinc alloy coated steel; Zn-Al coated steel; Zn–al hydrotalcite conversion film; Chemical Engineering (all); Surfaces, Coatings and Films; Organic Chemistry; Materials Chemistry; General Chemical Engineering
Abstract :
[en] The Zn-Al-CO32− hydrotalcite (HT) conversion film was developed on hot-dip galvanized steel (HDG), Zn–Al coated steel (ZA), and Zn-Al-Mg coated steel (ZAM) substrates by “in situ” growth process for Al3+/Zn2+ ratio of 5/3 at pH 12. The characteristics of all the Zn–Al HT film-coated samples before and after exposure to 0.1 M NaCl for 24 h were investigated by means of Fourier-transform infrared (FT-IR), X-Ray Diffraction (XRD), electron microscopy/energy dispersive X-ray spectroscopy SEM/EDS, and X-ray photoelectron spectroscopy (XPS). The corrosion properties of all the samples were studied by open circuit potential measurements (OCP), polarization curves, and electrochemical impedance spectroscopy (EIS). The electrochemical tests indicated that the HT film-coated can significantly restrain the corrosion of the HDG, ZA, and ZAM substrates but this efficiency was depending on the alloying compounds of the sacrificial layer. The inhibitive effect of HT film-coated on all the corrosion substrates was discussed in detail.
Research center :
CRIM - Ingénierie des matériaux
Disciplines :
Materials science & engineering
Author, co-author :
Pham, Thu Thuy; Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, Viet Nam ; Université de Mons, Materials Science Department, Mons, Belgium
Nguyen, Thuy Duong; Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, Viet Nam
Nguyen, Anh Son; Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, Viet Nam
Gonon, Maurice; Université de Mons, Materials Science Department, Mons, Belgium
Noirfalise, Xavier ; Université de Mons - UMONS > Unités externes > Materia Nova ASBL ; Materia Nova, Parc Initialis, Mons, Belgium
Paint, Yoann ; Université de Mons - UMONS ; Materia Nova, Parc Initialis, Mons, Belgium
To, Thi Xuan Hang; Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, Viet Nam ; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Viet Nam
Olivier, Marie-Georges ; Université de Mons - UMONS > Faculté Polytechnique > Service de Science des Matériaux ; Université de Mons - UMONS > Faculté Polytechnique > Science des Matériaux ; Université de Mons - UMONS ; Materia Nova, Parc Initialis, Mons, Belgium
Language :
English
Title :
Study of the formation and anti-corrosion properties of Zn–Al hydrotalcite conversion films grown “in situ” on different zinc alloys coated steel
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
Name of the research project :
4617 - ARES PRD 2020 - Vietnam - Renforcement de l'expertise du centre de compétences en protection contre la corrosion et en éléctrochimie - Fédération Wallonie Bruxelles
Funders :
ARES - Académie de Recherche et d'Enseignement Supérieur [BE]
Funding text :
This project attributed a PhD grant to Pham Thu Thuy for coming in Belgium for a part of her research (six months per year).The Université of Mons has received a financial funding coming from the ARES (Belgium) in the framework of the PRD Project “RENFORCEMENT DE L'EXPERTISE ENVIRONNEMENTALE DU CENTRE DE COMPÉTENCES EN PROTECTION CONTRE LA CORROSION ET EN ÉLECTROCHIMIE”, Institute of Tropical Technology, Vietnam”, 2020–2025.
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