Title:
ZINC-PLATED STEEL SHEET HAVING COATING FILM FORMED THEREON AND HAVING EXCELLENT WHITE RUST RESISTANCE
Document Type and Number:
WIPO Patent Application WO/2011/111571
Kind Code:
A1
Abstract:
Disclosed is a zinc-plated steel sheet having a coating film formed thereon, in which a multi-layered coating film composed of a non-chromium coating composition is formed on both the front surface and the rear surface thereof, and which has excellent corrosion resistance in a flat area and excellent resistance to white rust in a processed part and an edge part (which is highly visible particularly in the initial stage in use). Specifically disclosed is a zinc-plated steel sheet having a coating film formed thereon, in which a multi-layered coating film is formed on the front surface thereof and a one-layered or multi-layered coating film is formed on the rear surface thereof. In the steel sheet, a coating film composed of a coating composition that comprises a hydroxy-group-containing coating-film-forming resin and contains a predetermined amount of an anti-corrosion pigment is formed on the lowermost layer of at least one of the front and rear surfaces thereof, and a coating film composed of a coating composition that contains a predetermined amount of a silicic acid ion of a metal silicate salt and a metal ion exchange silica, a phosphoric acid group and/or a phosphate salt group of a phosphoric-acid-group-containing coating-film-forming resin and/or a phosphate-salt-group-containing coating-film-forming resin, and/or an azole compound is formed on the uppermost layer of at least one of the front and rear surfaces.
Inventors:
MATSUDA, Hideki (17-1, Higashiyawata 4-chome, Hiratsuka-sh, Kanagawa 62, 〒2548562, JP)
松田 英樹 (〒62 神奈川県平塚市東八幡４丁目１７番１号 関西ペイント株式会社内 Kanagawa, 〒2548562, JP)
HAYASHI, Masahiro (17-1, Higashiyawata 4-chome, Hiratsuka-sh, Kanagawa 62, 〒2548562, JP)
林 眞弘 (〒62 神奈川県平塚市東八幡４丁目１７番１号 関西ペイント株式会社内 Kanagawa, 〒2548562, JP)
松田 英樹 (〒62 神奈川県平塚市東八幡４丁目１７番１号 関西ペイント株式会社内 Kanagawa, 〒2548562, JP)
HAYASHI, Masahiro (17-1, Higashiyawata 4-chome, Hiratsuka-sh, Kanagawa 62, 〒2548562, JP)
林 眞弘 (〒62 神奈川県平塚市東八幡４丁目１７番１号 関西ペイント株式会社内 Kanagawa, 〒2548562, JP)
Application Number:
JP2011/054658
Publication Date:
September 15, 2011
Filing Date:
March 01, 2011
Export Citation:
Assignee:
KANSAI PAINT CO., LTD. (33-1, Kanzaki-cho Amagasaki-sh, Hyogo 55, 〒6618555, JP)
関西ペイント株式会社 (〒55 兵庫県尼崎市神崎町３３番１号 Hyogo, 〒6618555, JP)
MATSUDA, Hideki (17-1, Higashiyawata 4-chome, Hiratsuka-sh, Kanagawa 62, 〒2548562, JP)
松田 英樹 (〒62 神奈川県平塚市東八幡４丁目１７番１号 関西ペイント株式会社内 Kanagawa, 〒2548562, JP)
HAYASHI, Masahiro (17-1, Higashiyawata 4-chome, Hiratsuka-sh, Kanagawa 62, 〒2548562, JP)
関西ペイント株式会社 (〒55 兵庫県尼崎市神崎町３３番１号 Hyogo, 〒6618555, JP)
MATSUDA, Hideki (17-1, Higashiyawata 4-chome, Hiratsuka-sh, Kanagawa 62, 〒2548562, JP)
松田 英樹 (〒62 神奈川県平塚市東八幡４丁目１７番１号 関西ペイント株式会社内 Kanagawa, 〒2548562, JP)
HAYASHI, Masahiro (17-1, Higashiyawata 4-chome, Hiratsuka-sh, Kanagawa 62, 〒2548562, JP)
International Classes:
B32B27/18; B05D7/14; B32B15/08; C09D5/08; C09D163/00; C09D167/00; C23C2/06
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (Kitahama TNK Building, 1-7-1 Doshomachi,Chuo-ku, Osaka-shi, Osaka 45, 〒5410045, JP)
Claims: