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Title:
METHOD FOR PRODUCING GALVANIZED STEEL PLATE
Document Type and Number:
WIPO Patent Application WO/2017/154495
Kind Code:
A1
Abstract:
Provided is a method for producing a galvanized steel plate having exceptional press moldability. This method for producing a galvanized steel plate is provided with: an oxide layer formation step in which a galvanized steel plate is held for 1-60 seconds after being brought into contact with an acidic solution, then washed with water; and a neutralization step in which the surface of the zinc oxide layer formed in the oxide layer formation step is held for 0.5 second or longer in a state of contact with an alkaline aqueous solution, then washed with water and dried. The acidic solution contains a total of 0.10-5.0 g/L of HF2Na and/or HF2K.

Inventors:
HOSHINO Katsuya (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
FURUYA Shinichi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
MATSUDA Takeshi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
TSUCHIMOTO Kazuaki (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
MATSUZAKI Akira (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
Application Number:
JP2017/005604
Publication Date:
September 14, 2017
Filing Date:
February 16, 2017
Export Citation:
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Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 〒1000011, JP)
International Classes:
C23C22/34; C23C28/00; C23C2/06; C23C2/28; C23C4/08
Domestic Patent References:
WO2015129283A12015-09-03
Foreign References:
JP2010090401A2010-04-22
JPS5641387A1981-04-18
JPS56119782A1981-09-19
JPS63274777A1988-11-11
Other References:
See also references of EP 3428315A4
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JFE Techno-Research Corporation 7-1, Otemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
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