Coating processes – With post-treatment of coating or coating material – Gas jet or blast mechanically treats coating
Patent
1985-05-29
1986-06-10
Hoffman, James R.
Coating processes
With post-treatment of coating or coating material
Gas jet or blast mechanically treats coating
118 56, 427367, B05D 312, C23C 216, C23C 222
Patent
active
045942722
ABSTRACT:
The invention relates to a process for manufacturing a strip of hot galvanized sheet steel devoid of a coating of pure Zn or a coating based on Zn on at least one side of the strip, comprising passing the strip continuously in a conventional dipping galvanization bath, wiping by pneumatic means a part of the coating of liquid Zn deposited on the strip, and subjecting at least one side of the strip to a mechanical action for completely eliminating the coating based on zinc which is not alloyed to the iron, by allowing to subsist only a thin iron-zinc alloy layer, said mechanical action on the layer of coating based on zinc which is still liquid being exerted by means of a brush at least the bristles of which are energetically cooled. The invention also provides a cooled brushing device (10) for carrying out the process.
REFERENCES:
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patent: 3260577 (1966-07-01), Mayhew
patent: 3383189 (1968-05-01), Sendzimir
patent: 4071643 (1978-01-01), Pratt et al.
patent: 4120997 (1978-10-01), Franks et al.
patent: 4291074 (1981-09-01), Schoeps et al.
Patent Abstracts of Japan, vol. 4, No. 69 (C-11)(551), May 22, 1980, p. 59C11; & JP-A No. 55 34670 (Hitachi Seisakusho) 11/03/80, Abstract.
FR-A-1 No. 279 624 (Armco Steel Corp.), Abstract, p. 2, col. 2, lines 2,3.
EP-A-0 No. 011 547 (Laminoirs De Strasbourg), FIGS. 1-5, claim 1; FIG. 6, claims 2-7.
Hoffman James R.
Union Siderurgique du Nord et de L'est de la France (USINOR)
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