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1. (WO2017154495) METHOD FOR PRODUCING GALVANIZED STEEL PLATE

Pub. No.:    WO/2017/154495    International Application No.:    PCT/JP2017/005604
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Fri Feb 17 00:59:59 CET 2017
IPC: C23C 22/34
C23C 28/00
C23C 2/06
C23C 2/28
C23C 4/08
Applicants: JFE STEEL CORPORATION
JFEスチール株式会社
Inventors: HOSHINO Katsuya
星野 克弥
FURUYA Shinichi
古谷 真一
MATSUDA Takeshi
松田 武士
TSUCHIMOTO Kazuaki
土本 和明
MATSUZAKI Akira
松崎 晃
Title: METHOD FOR PRODUCING GALVANIZED STEEL PLATE
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.