Effect of heat treatment on corrosion resistance and adhesion property in Zn-Mg-Zn multi-layer coated steel prepared by PVD process

Byun, Jong Min; Bang, Su-Ryong; Kim, Hyun Woo; Kim, Tae-Yeob; Hong, Suk-Jun; Kim, Jae Won

doi:10.1016/j.surfcoat.2016.10.043

Cited by 18 publications

(9 citation statements)

References 16 publications

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“…There are just scant publications addressing the negative influence of annealing treatment on the adhesion of ZnMg coatings on steel substrate. Byun et al have used a 0T bending test to study the effect of a short annealing time at 200 °C on the adhesion of Zn-Mg-Zn multilayer coated steel [8]. It was found that the volume fraction of the intermetallic compounds increases with the increasing of the annealing time and the adhesion drops drastically after 240 sec at which, around 90 % of the microstructure consists of the intermetallic compounds.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

New insight into the loss of adhesion of ZnMg Zn bi-layered coatings on steel substrates

Sabooni

Galinmoghaddam

Cao

et al. 2019

Surface and Coatings Technology

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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" at the ZnMg/Zn interface was quantified by using scratch test. The novel finding is that the adhesion strength of asdeposited coatings at the interface of ZnMg/Zn is independent of the thickness of the zinc interlayer (tZn). tZn decreases gradually during annealing at 180 °C. The "adhesion performance" of the studied coatings, as tested by BMW crash adhesion test (BMW AA-M223), drops drastically when tZn is less than a threshold (~ 500 nm). The obtained results indicate that tZn plays the significant role in the adhesion performance of ZnMg-Zn bi-layered coatings.

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Section: Accepted Manuscriptmentioning

confidence: 99%

New insight into the loss of adhesion of ZnMg Zn bi-layered coatings on steel substrates

Sabooni

Galinmoghaddam

Cao

et al. 2019

Surface and Coatings Technology

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“…Post-heat-treatment of the coatings is an effective way to improve anticorrosion behaviour [13][14][15][16][17][18]. This improvement is attributed to the decrease of OH functional group [19][20][21] and, consequently, formation of a hydrophobic compact surface [22][23][24]. The heat treatment time is a crucial step because the macromolecular complex coating has the ability to decompose into smaller organic structures, which is always accompanied by film shrinkage and surface micro-cracks [25,26].…”

Section: Introductionmentioning

confidence: 99%

Heat treatment of Hexa-Methylene Diamine Tetra-Methylene Phosphonic Acid (HMDTMPA) coating on biodegradable Mg to improve corrosion resistance and bioactivity

Soliman

Makhlouf

Wan

2021

Surface Engineering

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Since the bioactive surface needs hydrophilic coating; and the high corrosion resistance needs a hydrophobic one, it is a challenge to design a bioactive film that exhibits corrosion protection. In this article, Hexa-Methylene Diamine Tetra-Methylene Phosphonic Acid (HMDTMPA) film was deposited on Mg substrate at different heat treatment conditions. The heat-treated films at 150°C showed remarkable anticorrosion performance about five times the non-heated film. In addition, bioactivity character such as live cells attraction was noticed due to the increase of P-O groups that compensated the decrease of O-H groups in the film structure. Through the post-heat treatment, we were able to provide a new insight towards understanding how particular functional groups (OH) can modify the organic coating quality. The master key here is the formation of a stable film of chloroapatite that plays dual functions to inhibit the corrosive ions penetration and improve the bioactivity to attract the living-cell.

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“…PVD is able to prevent the formation of several Zn-Mg phases. This is an advantage because a composite electrode enables local galvanic currents that accelerate corrosion in liquids [25][26][27]. Continuous galvanizing by PVD is limited to deposits on steel strips because the cleaning plasma, and vapour sources, must be close to the substrate.…”

Section: Introductionmentioning

confidence: 99%

General vapour-phase galvanizing and duplex coatings

Petit

2019

Surface and Coatings Technology

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General vapour-phase galvanizing produces fully alloyed Fe-Zn coatings on steel by exposing complex-shaped articles to hot zinc vapours in vacuum. This way, the processing temperature can be reduced to 350°C. The growth from the gas phase generates microstructures different than other galvanizing technologies. Changing the temperature of growth produces different microstructures in coatings of similar thickness. Mechanical properties are correlated to these microstructures. The chemical properties and the natural roughness of the alloyed surface provide excellent adhesion of the organic topcoat in duplex coatings on vapour-phase galvanized steel. We have performed salt spray and Kesternich tests. The corrosion resistance of bare coatings and duplex coatings are superior to the one of commercial galvanized and galvannealed steels. The specific protocol making general vapour-phase galvanizing possible is presently named as "Epanizing".

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Effect of heat treatment on corrosion resistance and adhesion property in Zn-Mg-Zn multi-layer coated steel prepared by PVD process

Cited by 18 publications

References 16 publications

New insight into the loss of adhesion of ZnMg Zn bi-layered coatings on steel substrates

New insight into the loss of adhesion of ZnMg Zn bi-layered coatings on steel substrates

Heat treatment of Hexa-Methylene Diamine Tetra-Methylene Phosphonic Acid (HMDTMPA) coating on biodegradable Mg to improve corrosion resistance and bioactivity

General vapour-phase galvanizing and duplex coatings

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