Method for producing black colored steel strip

Details Method for producing black colored steel strip Method for producing black colored steel strip

1989-04-25

1990-06-19

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

204 561, C25D 706

Patent

active

049351117

ABSTRACT:
A black colored steel strip having improved degree of blackness and uniform appearance is prepared by subjecting a Zn-Ni alloy plated steel substrate to anodic electrolysis or alternating current electrolysis in an electrolyte solution containing at least one member selected from the group consisting of hydroxide, sulfate, and chloride of sodium, potassium, or nickel; nitrate ion; and at least one member selected from an inhibitor and a complexing agent.

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