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1. (WO2017038911) INSULATIVE COATING PROCESSING LIQUID AND METHOD FOR MANUFACTURING METAL HAVING INSULATIVE COATING

Pub. No.:    WO/2017/038911    International Application No.:    PCT/JP2016/075596
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Fri Sep 02 01:59:59 CEST 2016
IPC: C23C 22/07
C21D 9/46
C23C 22/00
C23C 22/12
C23C 22/42
H01F 1/18
Applicants: JFE STEEL CORPORATION
JFEスチール株式会社
Inventors: TERASHIMA Takashi
寺島 敬
SUEHIRO Ryuichi
末廣 龍一
WATANABE Makoto
渡邉 誠
TAKAMIYA Toshito
▲高▼宮 俊人
Title: INSULATIVE COATING PROCESSING LIQUID AND METHOD FOR MANUFACTURING METAL HAVING INSULATIVE COATING
Abstract:
Provided is an insulative coating processing liquid with which an insulative coating having excellent physical properties can be obtained. The insulative coating processing liquid contains: at least one phosphate selected from the group consisting of Mg, Ca, Ba, Sr, Zn, Al, and Mn; and two or more types of colloidal silicas having different mean particle diameters, wherein the total contained amount of the colloidal silicas in terms of the SiO2 solid content is 50-120 parts by mass with respect to 100 parts by mass of the solid content of the phosphate, a mean particle diameter ratio expressed as ri+1/ri is not lower than 1.5 when the mean particle diameters of the colloidal silicas are represented as r1, …, rn in an ascending order, and a mass ratio expressed as wi+1/(wi+1+wi) is 0.30-0.90 when the masses of the colloidal silicas in terms of the SiO2 solid content are represented as w1, …, wn in an ascending order of the respective mean particle diameters. It should be noted that n represents an integer equal to or larger than 2, and i represents an integer of 1-n.