Process for producing a hot dip galvanized steel strip

Details Process for producing a hot dip galvanized steel strip Process for producing a hot dip galvanized steel strip

1981-01-26

1983-01-18

Silverberg, Sam

Coating processes

With post-treatment of coating or coating material

Gas jet or blast mechanically treats coating

427433, 427432, A23F 100

Patent

active

043692117

ABSTRACT:
A hot dip galvanized steel strip in which the zinc based alloy coating exhibits a satisfactory appearance and is firmly fixed to the strip substrate, which strip is produced by a process which comprises coating at least one surface of a steel strip with a melted zinc based alloy controlling the weight of the melted zinc based alloy coating and; solidifying the melted zinc based alloy coating and which process is characterized in that the zinc based alloy contains 0.1 to 2.0% by weight of magnesium and in at least a portion of a stage in which the melted zinc based alloy coating is still in the fluid state, the zinc based alloy coating is exposed to an oxygen-controlled atmosphere containing 1000 ppm or less of molecular oxygen, the controlling procedure for the weight of the melted zinc based alloy coating being carried out in the oxygen-controlled atmosphere.

REFERENCES:
patent: 3320040 (1967-05-01), Roe
patent: 3505042 (1970-04-01), Sievert et al.
patent: 3993482 (1976-11-01), Brunno
patent: 4029478 (1977-06-01), Lee
patent: 4082868 (1978-04-01), Schnedler et al.
patent: 4107357 (1978-08-01), Asakawa et al.
patent: 4172911 (1979-10-01), Michels

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