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J. Jap. Inst. Metals 71(4) 379.pdf2.36 MBPDFView/Open
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Title: 55%Al-Zn合金めっき鋼板上の欠陥の種類と生成機構
Other Titles: Kinds of Defect and Mechanism of Formation on the Hot-Dip Galvanized Coating
Authors: 柏谷, 悦章1 Browse this author →KAKEN DB
佐藤, 章2 Browse this author
石井, 邦宜3 Browse this author
Authors(alt): Kashiwaya, Yoshiaki1
Sato, Akira2
Ishii, Kuniyoshi3
Keywords: hot dip galvanized coating
intermetallic compound
Issue Date: Apr-2007
Publisher: 日本金属学会
Journal Title: 日本金属学会誌
Journal Title(alt): Journal of the Japan Institute of Metals
Volume: 71
Issue: 4
Start Page: 379
End Page: 387
Publisher DOI: 10.2320/jinstmet.71.379
Abstract: The defects of the hot-dip galvanized coating found in the course of actual operation were sampled for clarifying the defect formation mechanism. The composition of galvanized coating was 43.4 mass%Zn-55 mass%Al-1.6 mass%Si. In the initial stage and middle stage of operation, five defects were selected from many defects. Observations of optical microscope and SEM, analyses by μ-XRF and SEM-EDS were carried out for the surface and the cross section of those defects. The results were summarized and classified into three kinds of formation mechanism as follows: (1) One is the defect occurred from the remained oxide film on the steel surface which was not reduced in the surface treatment process. (2) Second is the defect occurred from the dross (Fe-Al-(Si) intermetallic compound) formed in the bath. (3) Third is the defect occurred from the aggregation consisted of the dross (Fe-Al-(Si) intermetallic compound) and metal oxides (CaO, SiO2 and Fe2O3, and so on) existing as impurities.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 柏谷 悦章

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