Surface treatment of zinc alloy electroplated steel strips

Details Surface treatment of zinc alloy electroplated steel strips Surface treatment of zinc alloy electroplated steel strips

1985-01-02

1985-10-22

Page, Thurman K.

Stock material or miscellaneous articles

Composite

Of silicon containing

148 62, 204 40, 427409, 428460, 428626, 428641, 428658, 428667, B32B 904, B05D 302, C23C 110

Patent

active

045488681

ABSTRACT:
A surface coated steel strip having improved corrosion resistance, comprising a steel strip, a zinc alloy (e.g. Zn-Ni, Zn-Mn, Zn-Co, etc.) layer electroplated on the strip, a chromate film formed on the zinc alloy layer in a weight of 2 to 60 mg/m.sup.2, and a polyethylene coating cured to the chromate film and weighing 0.3 to 5 g/m.sup.2 is prepared by applying a chromate solution to the zinc alloy plated strip and drying it into the chromate film, and applying an aqueous composition of a carboxylated-polyethylene resin, a melamine resin, and colloidal silica to the chromated strip and drying and curing the composition into the coating at elevated temperatures of at least 130.degree. C.

REFERENCES:
patent: 4003760 (1977-01-01), Labenski et al.
patent: 4032675 (1977-06-01), Irie et al.
patent: 4221832 (1980-09-01), Philippe et al.
patent: 4373968 (1983-02-01), Hess
patent: 4497876 (1985-02-01), Kidon
patent: 4500610 (1985-02-01), Gunn et al.

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