Zn-Al hot-dip coated ferrous sheet

Details Zn-Al hot-dip coated ferrous sheet Zn-Al hot-dip coated ferrous sheet

1976-01-05

1977-06-14

Steiner, Arthur J.

Stock material or miscellaneous articles

All metal or with adjacent metals

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

427433, B32B 1518, B32B 1520

Patent

active

040294781

ABSTRACT:
A ferrous metal strip is continuously hot-dip coated with a zinc-aluminum alloy by immersing the metal strip in a hot-dip coating bath containing between about 0.2 wt. percent and 17 wt. percent aluminum, between about 0.02 wt. percent and 0.15 wt. percent lead, and between about 0.03 wt. percent and about 0.15 wt. percent magnesium with the balance essentially zinc. In a further embodiment the hot-dip alloy coating can also contain between about 0.1 wt. % and 0.3 wt. % copper. The resulting hot-dip zinc-aluminum alloy coatings when applied to a ferrous metal strip exhibit good resistance to intergranular corrosion and blistering when exposed to a high humidity atmosphere and form smooth surface coatings which have good formability both in the "as coated" state and after prolonged storage in a high humidity atmosphere.

REFERENCES:
patent: 2824021 (1958-02-01), Cook et al.
patent: 3056694 (1962-10-01), Mehler et al.
patent: 3245765 (1966-04-01), Lawson
patent: 3320040 (1967-05-01), Roe et al.
patent: 3505043 (1970-04-01), Lee et al.

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