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1. (WO2018198384) WATER-BASED TREATMENT SOLUTION, CHEMICAL CONVERSION TREATMENT METHOD, AND CHEMICAL-CONVERSION-TREATED STEEL SHEET

Pub. No.:    WO/2018/198384    International Application No.:    PCT/JP2017/018775
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat May 20 01:59:59 CEST 2017
IPC: C23C 28/00
C23C 22/34
Applicants: NISSHIN STEEL CO., LTD.
日新製鋼株式会社
Inventors: MATSUNO, Masanori
松野 雅典
UENO, Shin
上野 晋
Title: WATER-BASED TREATMENT SOLUTION, CHEMICAL CONVERSION TREATMENT METHOD, AND CHEMICAL-CONVERSION-TREATED STEEL SHEET
Abstract:
The purpose of the present invention is to provide a water-based treatment solution which makes it possible to form a chemical-conversion-treated coating film having further improved corrosion resistance. The present invention relates to a water-based treatment solution for a chemical conversion treatment of a steel sheet or a plated steel sheet. The water-based treatment solution contains an organic resin including a fluororesin, a Group-4A metal compound, and at least one binding promoter selected from the group consisting of dimethyl adipate, diethyl adipate, di(iso)propyl adipate, di(iso)butyl adipate, dimethyl phthalate, diethyl phthalate, di(iso)propyl phthalate and di(iso)butyl phthalate.