Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1989-10-19
1990-08-07
Niebling, John F.
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428643, 428645, 428677, 428679, 428684, 204 351, 204 384, 204 40, 204 431, 204 444, 204 445, 204 447, B32B 1504, B32B 1518, C25D 510, C25D 548
Patent
active
049467484
ABSTRACT:
Disclosed is a coated steel sheet valuable for the production of a fuel vessel, in which a first covering layer comprising a Pb-Sn alloy as the main component is formed on a substrate comprising a steel sheet and an undercoat covering layer composed of at least one member selected from Ni, Co and Cu, which is formed on the surface of the steel sheet according to need, a second covering layer containing a compound containing Pb and P is formed on the first covering layer, a third covering layer containing at least one member selected from Sn, Ni and Co is formed on the second covering layer, and according to need, the surface portion of the third covering layer is modified with a treating liquid containing a phosphoric acid ion or a chromic acid ion. This coated steel sheet shows a highly improved corrosion resistance, forming processability, solderability, and weldability.
REFERENCES:
patent: 4013488 (1977-03-01), Ramquist et al.
patent: 4082621 (1978-04-01), Spiliotis et al.
patent: 4413039 (1983-11-01), Higuchi et al.
The Iron Age, vol. 3, No. 199, Jan. 19, 1967, pp. 62-63 "Lead Phosphate Protects Steel And Preserves its Weldability".
Patent Abstracts of Japan, vol, 8, No. 130 (C-229) (1567), Jun. 16, 1984-JP-A-59-41459.
European Search Report, Application No. EP 86 90 0284
International Search Report, Application No. PCT/JP85/00727.
Asakawa Kenichi
Fujinaga Minoru
Higuchi Seijun
Mizuguchi Toshinori
Hsing Ben C.
Niebling John F.
Nippon Steel Corporation
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