Effect of heat treatment on corrosion resistance and adhesion property in Zn-Mg-Zn multi-layer coated steel prepared by PVD process
- Authors
- Byun, Jong Min; Bang, Su-Ryong; Kim, Hyun Woo; Kim, Tae-Yeob; Hong, Suk-Jun; Kim, Young Do
- Issue Date
- Jan-2017
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Zn-Mg alloy; Alloying behavior; Heat treatment; Corrosion resistance; Adhesion property
- Citation
- SURFACE & COATINGS TECHNOLOGY, v.309, pp.1010 - 1014
- Indexed
- SCIE
SCOPUS
- Journal Title
- SURFACE & COATINGS TECHNOLOGY
- Volume
- 309
- Start Page
- 1010
- End Page
- 1014
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/21253
- DOI
- 10.1016/j.surfcoat.2016.10.043
- ISSN
- 0257-8972
- Abstract
- In this study, as the alternatives to the depletion of Zn resources, the Zn-Mg alloy was deposited on a steel substrate by a PVD process. Considering the difference of vapor pressure between Zn and Mg in vacuum condition, Zn, Mg and Zn were sequentially coated by PVD process to form a uniform coating layer, and a heat treatment was separately conducted at 200°C under vacuum condition. As the heating time increased, the volume fraction of the intermetallic compound phases (Mg2Zn11 and MgZn2) gradually increased up to the heat-treated sample for 360 s. From the OT-bending test, delamination of the coating layer was observed from heat-treated sample for 240 s which is composed of over 85% of the intermetallic compound phases. And from the salt spray test, it is confirmed that the red rust generation time was 624 h in heat-treated sample for 360 s which was composed entirely of Zn-Mg intermetallic compound phases.
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