Hot-dipped aluminum coated steel sheet having excellent corrosio

Details Hot-dipped aluminum coated steel sheet having excellent corrosio Hot-dipped aluminum coated steel sheet having excellent corrosio

1996-05-17

1998-08-04

Thibodeau, Paul J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

427405, 427409, 4274192, 427436, 428626, 428652, 428653, 428654, 428682, 428684, 428685, 428939, B21D 3900

Patent

active

057890897

ABSTRACT:
A hot-dipped aluminum coated steel sheet including, on the surface thereof, a coating layer consisting of 2 to 15 wt % of Si, not greater than 1.2 wt % of Fe, 0.005 to 0.6 wt % of Mn, 0.002 to 0.05 wt % of Cr and the balance of Al and unavoidable impurities, and an alloy layer disposed between the coating layer and the steel sheet, having a thickness of not greater than 7 .mu.m and having a mean composition consisting of 20 to 50 wt % of Fe, 3 to 20 wt % of Si, 0.1 to 10 wt % of Mn, 0.05 to 1.0 wt % of Cr and the balance substantially consisting of Al. This steel sheet can be produced by conducting coating in a coating bath consisting of 3 to 15 wt % of Si, 0.5 to 3.5 wt % of Fe, 0.05 to 1.5 wt % of Mn, 0.01 to 0.2 wt % of Cr and the balance substantially consisting of Al, or by adjusting the sum of the concentrations of Zn and Sn in the impurities in the coating layer to not greater than 1 wt %.

REFERENCES:
patent: 3841894 (1974-10-01), Leonard
patent: 4546051 (1985-10-01), Uchida et al.
patent: 4727929 (1988-03-01), Shinoda et al.
patent: 4891274 (1990-01-01), Higuchi et al.
Patent Abstracts of Japan, vol. 12, No. 5, (C-467), Jan. 8, 1988 & JP-A-62 161944 (Nisshin Steel), Jul. 17, 1987.
Patent Abstracts of Japan, vol. 17, No. 46 (C-1021), Jan. 28, 1993 & JP-A-04 259363 (Nippon Steel Corp.), Sep. 14, 1992.
Patent Abstracts of Japan, vol. 17, No. 589 (C-1124), Oct. 27, 1993 & JP-A-05 171393 (Sumitomo Metal), Jul. 9, 1993.
Patent Abstracts of Japan, vol. 5, No. 178 (C-078), Nov. 14, 1981 & JP-A-56 102556 (Nisshin Steel), Aug. 17, 1981.

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