TY - GEN
T1 - Effects of magnesium concentration and layer thickness on the adhesion of physical vapor deposited znmg-zn bi-layer coatings
AU - Sabooni, Soheil
AU - Galinmoghaddam, Emad
AU - Westerwaal, Ruud Johannes
AU - Zoestbergen, Edzo
AU - Pei, Yutao
N1 - Funding Information:
ACKNOWLEDGEMENTS This research was carried out under project number S22.3.13513a within the framework of the Partnership Program of the Materials Innovation Institute M2i (www.m2i.nl) and the Technology Foundation TTW (www.stw.nl), which is part of the Netherlands Organization for Scientific Research (www.nwo.nl).
Publisher Copyright:
© 2019 WIT Press.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019
Y1 - 2019
N2 - For many years, zinc coatings have been regarded as one of the most effective anti-corrosion protective coatings for steel. Recently, it was shown that the addition of even small amounts of magnesium (Mg) to a zinc (Zn) coating can noticeably increase its corrosion protection performance; however, it has also been observed that there is poor adhesion of zinc-magnesium (ZnMg) coatings to advanced high-strength steels. The addition of a more ductile Zn interlayer between the steel substrate and the ZnMg coating is a solution to improve the adhesion problem. In the present study, a series of ZnMg-Zn bi-layered coatings with different Mg concentrations (up to 14.1 wt.% Mg), and also different thicknesses of the Zn and ZnMg layers, were prepared by a thermal evaporation process (physical vapor deposition (PVD)) in order to investigate the adhesion performance and interfacial adhesion strength. The adhesion performance of these coatings was qualified by the BMW crash adhesion test (BMW AA-M223), while the interfacial adhesion strength at the ZnMg/Zn interface was quantified by the scratch test. It was found that the interfacial adhesion strength decreases gradually with an increase in the Mg content of the top layer. The novel finding is that the interfacial adhesion strength at the ZnMg/Zn interface is independent of the thickness of the Zn interlayer; however, the adhesion performance of a ZnMg-Zn bi-layered coating during a bending test is a complex function of different parameters, such as the thickness of the Zn and ZnMg layers, the interfacial adhesion strength and the interfacial defects density.
AB - For many years, zinc coatings have been regarded as one of the most effective anti-corrosion protective coatings for steel. Recently, it was shown that the addition of even small amounts of magnesium (Mg) to a zinc (Zn) coating can noticeably increase its corrosion protection performance; however, it has also been observed that there is poor adhesion of zinc-magnesium (ZnMg) coatings to advanced high-strength steels. The addition of a more ductile Zn interlayer between the steel substrate and the ZnMg coating is a solution to improve the adhesion problem. In the present study, a series of ZnMg-Zn bi-layered coatings with different Mg concentrations (up to 14.1 wt.% Mg), and also different thicknesses of the Zn and ZnMg layers, were prepared by a thermal evaporation process (physical vapor deposition (PVD)) in order to investigate the adhesion performance and interfacial adhesion strength. The adhesion performance of these coatings was qualified by the BMW crash adhesion test (BMW AA-M223), while the interfacial adhesion strength at the ZnMg/Zn interface was quantified by the scratch test. It was found that the interfacial adhesion strength decreases gradually with an increase in the Mg content of the top layer. The novel finding is that the interfacial adhesion strength at the ZnMg/Zn interface is independent of the thickness of the Zn interlayer; however, the adhesion performance of a ZnMg-Zn bi-layered coating during a bending test is a complex function of different parameters, such as the thickness of the Zn and ZnMg layers, the interfacial adhesion strength and the interfacial defects density.
KW - Adhesion strength
KW - Bi-layered coating
KW - Crash adhesion test
KW - Magnesium
KW - Physical vapor deposition
KW - Scratch test
KW - Zinc
UR - http://www.scopus.com/inward/record.url?scp=85075676993&partnerID=8YFLogxK
U2 - 10.2495/MC190061
DO - 10.2495/MC190061
M3 - Conference contribution
AN - SCOPUS:85075676993
SN - 9781784663315
T3 - WIT Transactions on Engineering Sciences
SP - 63
EP - 71
BT - Materials and Contact Characterisation IX
A2 - Hernández, S.
A2 - De Hosson, J.
A2 - Northwood, D.O.
A2 - Vilar, R.
PB - WIT Press
T2 - 9th International Conference on Computational Methods and Experiments in Material and Contact Characterisation, 2019
Y2 - 22 May 2019 through 24 May 2019
ER -