Method for controlling the thickness of an intermetallic (Fe-Zn

Details Method for controlling the thickness of an intermetallic (Fe-Zn Method for controlling the thickness of an intermetallic (Fe-Zn

1987-02-27

1988-06-21

Silverberg, Sam

Coating processes

Immersion or partial immersion

Molten metal or fused salt bath

427431, C23C 206

Patent

active

047525088

ABSTRACT:
The present invention relates to a method for controlling the thickness of an intermetallic layer (Fe-Zn phase) on a steel strip in a continuous hot-dip galvanizing line. The steel strip is rapidly cooled by quenching in a zinc bath and the structure of the coating to be formed on the steel strip is controlled by directing a flow of molten zinc, cooled to a temperature 1.degree. to 15.degree. C. below the operating temperature of the zinc bath, towards the steel strip. At least a part of said flow is preferably directed towards the steel strip close to its immersion point into the zinc bath, obliquely against the movement direction of the steel strip.

REFERENCES:
patent: 4082869 (1978-04-01), Raymond
patent: 4361448 (1982-11-01), Seppolg

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