Method of making differentially coated one side alloyed galvaniz

Details Method of making differentially coated one side alloyed galvaniz Method of making differentially coated one side alloyed galvaniz

1977-05-23

1978-08-01

Stallard, W.

Metal treatment

Compositions

Heat treating

148 12C, 148 12D, 427357, 427360, 427383D, 427433, C23C 102

Patent

active

041040880

ABSTRACT:
Zinc coated steel strip is produced by passing a strip through a molten zinc bath containing from 0.15% to 0.18% aluminum, controlling zinc coating weights to produce a relatively light coating of 0.20 oz./sq.ft. maximum on one side and a relatively heavy coating of 0.20 oz./sq.ft. minimum in the other side, and then uniformly heating both sides for a time and temperature sufficient to completely form an iron-zinc alloy on the light coated side and yet retain the essentially unalloyed zinc coating on the heavy coated side.

REFERENCES:
patent: 3056694 (1962-10-01), Mehler et al.
patent: 3977842 (1976-08-01), Mayhew

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