Study of the formation and anti-corrosion properties of Zn-Al hydrotalcite conversion films grown "in situ" on different zinc alloys coated steel

被引：9
作者：
Pham, Thu Thuy [1 ,2 ]
Nguyen, Thuy Duong [1 ]
Nguyen, Anh Son [1 ]
Gonon, Maurice [2 ]
Noirfalise, Xavier [3 ]
Paint, Yoann [3 ]
To, Thi Xuan Hang [1 ,4 ]
Olivier, Marie-Georges [2 ,3 ]
机构：
[1] Vietnam Acad Sci & Technol, Inst Trop Technol, 18 Hoang Quoc Viet, Hanoi, Vietnam
[2] Univ Mons, Mat Sci Dept, Pl Parc 20, Mons, Belgium
[3] Parc Initialis, Mat Nova, Mons, Belgium
[4] Vietnam Acad Sci & Technol, Grad Univ Sci & Technol, 18 Hoang Quoc Viet, Hanoi, Vietnam
来源：
PROGRESS IN ORGANIC COATINGS | 2022年 / 173卷
关键词：
Zn-Al hydrotalcite conversion films; Zinc alloys coated steel; Anti-corrosion; LAYERED DOUBLE HYDROXIDE; CORROSION-RESISTANCE; CARBON-STEEL; MG ALLOY; PROTECTION; MAGNESIUM; COATINGS; FABRICATION; PH;
D O I：
10.1016/j.porgcoat.2022.107221
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
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.
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页数：15
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