C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
117/92
C23C 2/02 (2006.01) B21B 45/08 (2006.01) C21D 8/08 (2006.01) C23C 2/06 (2006.01) C23C 4/02 (2006.01) C23C 28/00 (2006.01) C23F 15/00 (2006.01) B21B 1/38 (2006.01)
Patent
CA 1306391
21182-284 ABSTRACT For application of a coating of a non-ferrous metal, such as for example zinc, on the surface of rolled steel to increase resistance to corrosion it is proposed that the rolling steel be descaled in direct continuation of the rolling process from the rolling heat by the use of water under pressure and directly after descaling, to prevent re-formation of scale, that it be cooled rapidly by the use of water to a temperature suitable for hot application of the coating and that finally the coating be applied. The advantage of the invention lies on the one hand in the fact that only one single medium, i.e. water, is used for both descaling and prevention of re-formation of scale and at the same time for cooling purposes, where cooling can be carried out such that the rolling heat is utilizable in an ideal manner for the purpose of coating. This ensures that all process stages or treatment processes can take place in direct continuation of the rolling process, that is to say at rolling speed, so that the finish coated end product leaves the production line in the same way as a normal rolled product, not subjected to aftertreatment.
576161
Aicher Max
Aicher Max
Fetherstonhaugh & Co.
Stahlwerk Annahutte Max Aicher Gmbh & Co. Kg
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