One-side zinc hot dipping process using an anti-plating agent

Details One-side zinc hot dipping process using an anti-plating agent One-side zinc hot dipping process using an anti-plating agent

1982-09-23

1984-10-16

Lawrence, Evan K.

Coating processes

Application to opposite sides of sheet, web, or strip

Roller applicator utilized

427300, 427359, 4273978, B05D 302, B05D 312

Patent

active

044774915

ABSTRACT:
One-side zinc hot dipped steel sheets are produced by coating one surface of a steel sheet with an aqueous slurry of an anti-plating agent based on MgO, alkali metal silicates, boric acid, MOH (M is an alkali metal) and the like and containing such additives as TiO.sub.2 and Al.sub.2 O.sub.3, heating the coated sheet for drying and baking, immersing the steel sheet with an anti-plating film in a molten zinc bath to zinc plate the other surface of the sheet, wetting the anti-plating film, and bending the steel sheet to cause the anti-plating film to peel off, thereby removing the anti-plating film from the steel sheet. This invention carries out the coating and baking of the anti-plating agent such that it is baked to a film having a thickness of 20 to 60 microns at a temperature of 750.degree. C. to about 930.degree. C.

REFERENCES:
patent: 3181963 (1965-05-01), Cook et al.

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