Title:
SURFACE TREATED STEEL SHEET EXCELLENT IN CORROSION RESISTANCE
Document Type and Number:
Japanese Patent JP3451980
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce a surface treated steel sheet safe and harmless in the producing process and in the case of being used and capable of obtaining excellent corrosion resistance as well.
SOLUTION: The surface of a galvanized steel sheet or an aluminum plated steel sheet is provided with a multiple oxide film contg. (α) silicon components of 0.010 to 3000 mg/m2 by the amt. expressed in terms of SiO2, (β) Mg components and/or Ca components by the total of the amt. expressed in terms of Mg and the amt. expressed in terms of Ca and (γ) phosphoric acid and/or phosphoric compd. by 0.010 to 3000 mg/m2 by the amt. expressed in terms of P2O5, and in which the total of the coating weight of the components (α), (β) and (γ) is 1.0 to 5000 mg/m2.
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Inventors:
Satoshi Ando
Naoto Yoshimi
Takahiro Kubota
Masaaki Yamashita
Naoto Yoshimi
Takahiro Kubota
Masaaki Yamashita
Application Number:
JP12381799A
Publication Date:
September 29, 2003
Filing Date:
April 30, 1999
Export Citation:
Assignee:
JFE Steel Corporation
International Classes:
C23C22/00; C23C22/07; (IPC1-7): C23C22/00; C23C22/07
Domestic Patent References:
| JP9208859A |
Attorney, Agent or Firm:
Masatoshi Tomabechi
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