2019
DOI: 10.1016/j.surfcoat.2019.04.085
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New insight into the loss of adhesion of ZnMg Zn bi-layered coatings on steel substrates

Abstract: In this research, physically vapor deposited Mg-Zn and ZnMg-Zn bi-layered coatings were annealed at 180 °C for different annealing times to study the origin of the adhesion loss during heat treatment. In the case of Mg-Zn bi-layered coatings, it was observed that MgZn2 and Mg2Zn11 intermetallics are formed during annealing from Zn and Mg by diffusion, which results in a reduction of the thickness of the initial pure zinc interlayer. In the case of ZnMg-Zn bi-layered coating, the "interfacial adhesion strength"… Show more

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Cited by 10 publications
(2 citation statements)
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“…14) More recently, several investigators have reported the effect of a Zn interlayer between the substrate and the ZnMg coating on the adhesion strength of the ZnMg/Zn bilayer coating. 4,13,[15][16][17][18] Song et al 15) and Sabooni et al 17) both reported that a Zn interlayer is an essential part for the improvement of the adhesion strength of the Zn-Mg coatings, which confirmed the previous report by Jung et al 11) From the lap shear test results, the Zn interlayer significantly contributed to the improvement of the formability and adhesion of the Zn-Mg coating, showing that the maximum adhesion strength of the Zn-Mg coatings with the Zn interlayer became approximately twice as high as that of the Zn-Mg coatings without the Zn interlayer. 15) A modified Benjamin-Weaver model was suggested to quantify the adhesion strength of PVD ZnMg/ Zn bilayered coatings, and it was reported that the annealing treatment of the double-layer ZnMg/Zn coating was detrimental for the adhesion strength as the thickness of the Zn interlayer decreased below the critical value of 500 nm due to diffusion during the annealing.…”
Section: Controlling Void Contents In the Zn Interlayer For Improving...mentioning
confidence: 99%
See 1 more Smart Citation
“…14) More recently, several investigators have reported the effect of a Zn interlayer between the substrate and the ZnMg coating on the adhesion strength of the ZnMg/Zn bilayer coating. 4,13,[15][16][17][18] Song et al 15) and Sabooni et al 17) both reported that a Zn interlayer is an essential part for the improvement of the adhesion strength of the Zn-Mg coatings, which confirmed the previous report by Jung et al 11) From the lap shear test results, the Zn interlayer significantly contributed to the improvement of the formability and adhesion of the Zn-Mg coating, showing that the maximum adhesion strength of the Zn-Mg coatings with the Zn interlayer became approximately twice as high as that of the Zn-Mg coatings without the Zn interlayer. 15) A modified Benjamin-Weaver model was suggested to quantify the adhesion strength of PVD ZnMg/ Zn bilayered coatings, and it was reported that the annealing treatment of the double-layer ZnMg/Zn coating was detrimental for the adhesion strength as the thickness of the Zn interlayer decreased below the critical value of 500 nm due to diffusion during the annealing.…”
Section: Controlling Void Contents In the Zn Interlayer For Improving...mentioning
confidence: 99%
“…Another report showed that the segregation of magnesium at the steel-zinc interface during the annealing played an important role in the crash adhesion performance of the coatings, suggesting the Zn interlayer coating is necessary to improve the time to failure of the ZnMg/Zn bilayer coatings. 13) In a Zn-Mg-Zn…”
Section: Introductionmentioning
confidence: 99%