Effects of Silicon on Galvanizing Coating Characteristics in Dual Phase High Strength Steel
- Authors
- Jeon, Sun-Ho; Chin, Kwang-Geun; Shin, Kwang-Soo; Lee, Joon-Ho; Sohn, Ho-Sang
- Issue Date
- 7월-2009
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- galvanizing steel (GI); coatability; wettability; inhibition layer; selective oxidation; dual phase high strength steel
- Citation
- JOURNAL OF THE KOREAN INSTITUTE OF METALS AND MATERIALS, v.47, no.7, pp.423 - 432
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN INSTITUTE OF METALS AND MATERIALS
- Volume
- 47
- Number
- 7
- Start Page
- 423
- End Page
- 432
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/119756
- ISSN
- 1738-8228
- Abstract
- In the galvanizing coating process, the effects of the silicon content on the coatability and wettability of molten zinc were investigated on Dual-Phase High Strength Steels (DP-HSS) with various Si contents using the galvanizing simulator and dynamic reactive wetting systems. DP-HSS showed good coatability and a well-developed inhibition layer in the range of Si content below 0.5 wt%. Good coatability was the results of the mixed oxide Mn2SiO4, being formed by the selective oxidation on the surface, with a low contact angle in molten zinc and a large fraction of oxide free surface that provided a sufficient site for the molten zinc to wet and react with the substrate. On the other hand, with more than 0.5 wt%, DP-HSS exhibited poor coatability and an irregularly developed inhibition layer. The poor coatability was due to the poor wettability that resulted from the development of network-type layers of amorphous SiO2, leading to a high contact angle in molten zinc, on the surface.
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