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1. (WO2018025651) SURFACE-TREATED METAL PLATE AND METHOD FOR PRODUCING SURFACE-TREATED METAL PLATE

Pub. No.:    WO/2018/025651    International Application No.:    PCT/JP2017/026321
Publication Date: Fri Feb 09 00:59:59 CET 2018 International Filing Date: Fri Jul 21 01:59:59 CEST 2017
IPC: C23C 28/00
B32B 15/085
C09D 5/08
C09D 7/12
C09D 123/00
C23C 22/20
Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
株式会社神戸製鋼所
Inventors: NAKAMOTO, Tadashige
中元 忠繁
YU, Hang
于 航
Title: SURFACE-TREATED METAL PLATE AND METHOD FOR PRODUCING SURFACE-TREATED METAL PLATE
Abstract:
One aspect of the present invention is a surface-treated metal plate which comprises a galvanized steel sheet and a surface treatment coating film that is laminated on at least one surface of the galvanized steel sheet, and wherein: the surface treatment coating film is configured from a surface treatment composition that contains colloidal silica having an average particle diameter of 4-6 nm and a polyolefin resin containing no ammonia; the content of the colloidal silica is 10 parts by mass or more but less than 30 parts by mass relative to 100 parts by mass of the surface treatment composition; the coating amount of the surface treatment coating film is 0.4-1.2 g/m2; and the amount of sodium ions released from the surface treatment coating film when immersed in a deionization water at 70-80°C for 10 minutes is 4 mg/m2 or less.