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1. (WO2018042980) SURFACE-TREATED STEEL SHEET, ORGANIC RESIN-COATED STEEL SHEET, AND CONTAINER USING SAME

Pub. No.:    WO/2018/042980    International Application No.:    PCT/JP2017/027469
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Sat Jul 29 01:59:59 CEST 2017
IPC: C23C 28/00
B32B 15/01
B32B 15/08
B65D 1/00
B65D 8/00
C25D 9/08
Applicants: TOYO KOHAN CO., LTD.
東洋鋼鈑株式会社
TOYO SEIKAN CO., LTD.
東洋製罐株式会社
Inventors: TAGUCHI Naomi
田口 直美
YANADA Kenji
梁田 健司
MATSUKAWA Masahiko
松川 真彦
UCHIKAWA Miwa
内川 美和
YOSHIDA Keisuke
吉田 圭佑
Title: SURFACE-TREATED STEEL SHEET, ORGANIC RESIN-COATED STEEL SHEET, AND CONTAINER USING SAME
Abstract:
[Problem] To provide a surface-treated steel sheet, etc. for which it is possible to limit the occurrence of sulfidation blackening while taking the effects of stannous oxide and stannic oxide into consideration. [Solution] This surface-treated steel sheet: comprises a steel sheet, a tin plating layer formed on the steel sheet and a chemical conversion film that is formed on the tin plating layer and contains essentially no chromium; and is characterized in that in measurements using anode polarization, the current density ratio of the current density I1 at a potential representing the reaction of stannous oxide (SnO) after undergoing heat treatment equivalent to coating baking with respect to the sum (I1+I2) where I2 is the current density at a potential representing the reaction of stannic oxide (SnO2) is less than 0.36.