The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2016
Filed:
Nov. 30, 2011
Yuta Yoshida, Tokyo, JP;
Hiroki Sunada, Tokyo, JP;
Shigeki Yamamoto, Tokyo, JP;
Hidehiro Yamaguchi, Tokyo, JP;
Yuta Yoshida, Tokyo, JP;
Hiroki Sunada, Tokyo, JP;
Shigeki Yamamoto, Tokyo, JP;
Hidehiro Yamaguchi, Tokyo, JP;
NIHON PARKERIZING CO., LTD., Chuo-ku, Tokyo, JP;
Abstract
A replenisher which is capable of supplying Zr ions to a metal surface treatment solution, while suppressing an increase in the HF concentration in the metal surface treatment solution, so that a chemical conversion coating film can be continuously formed on a steel sheet by electrolysis and contains (A) zirconium hydrofluoric acid or a salt thereof and/or (B) hydrofluoric acid or a salt thereof and (C) a fluorine-free zirconium compound. The total concentration (g/l) of zirconium ions derived from the components (A) and (C) is 20 or more, and the ratio of the total molar amount (M) of the fluorine ions derived from the components (A) and (B) relative to the total molar amount (M) of the zirconium ions derived from the components (A) and (C), namely M/Mis 0.01 or more but less than 4.00.