Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Reexamination Certificate
2006-12-12
2006-12-12
Lavilla, Michael E. (Department: 1775)
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
C428S651000, C428S681000, C428S633000, C428S450000, C428S702000
Reexamination Certificate
active
07147934
ABSTRACT:
A chemically processed steel sheet comprises a steel base coated with an Al—Si alloy plating layer, whose Si content is preferably adjusted to 5–13 mass % as a whole and to 7–80 mass % at a surface, and a converted layer generated on the surface of the plating layer. The converted layer contains both soluble and scarcely-soluble compounds. The soluble compound, such as a manganese oxide or hydroxide, or a valve metal fluoride, is once dissolved into water in an atmosphere and then re-precipitated as scarcely-soluble compounds at defective parts of the converted layer. The scarcely-soluble compounds act as a barrier for corrosion prevention of a base steel. Due to the re-precipitation, i.e., self-repairing faculty, excellent corrosion resistance of the converted layer is still maintained even after defects are introduced therein during plastic deformation of the steel sheet.
REFERENCES:
patent: 5789089 (1998-08-01), Maki et al.
patent: 6361833 (2002-03-01), Nakada et al.
patent: 6361881 (2002-03-01), Izaki et al.
patent: 6509099 (2003-01-01), Urata et al.
patent: 2002/0098345 (2002-07-01), Kamo et al.
patent: 2002/0114971 (2002-08-01), Yamamoto et al.
patent: 09-020984 (1997-01-01), None
patent: 3302677 (2002-04-01), None
patent: 2002-146551 (2002-05-01), None
patent: 2002-146553 (2002-05-01), None
patent: 2003-213458 (2003-07-01), None
patent: 2004-052000 (2004-02-01), None
patent: WO 00/24948 (2000-05-01), None
Asabuki Mitsuo
Furukawa Shinya
Morikawa Shigeyasu
Taketsu Hirofumi
Yamamoto Masaya
Lavilla Michael E.
Nisshin Steel Co. Ltd.
The Webb Law Firm
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