Process for the electrolytic zinc coating of stainless steel
First Claim
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1. A process for the electrolytic zinc coating of stainless steel on at least one side of the steel, comprising the steps of:
- a) connecting the stainless steel as a cathode in the form of a stainless steel strip in a galvanic cell; and
b) depositing metallic zinc on the stainless steel strip from an aqueous solution of a zinc salt with a pH value of 1.0 to 2.5; and
c) subjecting the deposited zinc coated stainless steel of step b) to a subsequent heat treatment carried out at a temperature in a range from 100°
to 400°
C. for a duration of 1 to 30 minutes.
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Abstract
In a process for the electrolytic zinc coating of high-grade steel on one and two sides, the latter is connected as a cathode in the form of a high-grade steel strip in a galvanic cell, and metallic zinc is deposited on the high-grade steel strip from an aqueous solution of a zinc salt with a pH value of 1.0 to 2.5, preferably 1.5 to 2.0, as a result of which a contact corrosion with zinc-coated metal sheet is avoided, which is particularly important in the motor-car industry.
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12 Claims
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1. A process for the electrolytic zinc coating of stainless steel on at least one side of the steel, comprising the steps of:
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a) connecting the stainless steel as a cathode in the form of a stainless steel strip in a galvanic cell; and b) depositing metallic zinc on the stainless steel strip from an aqueous solution of a zinc salt with a pH value of 1.0 to 2.5; and c) subjecting the deposited zinc coated stainless steel of step b) to a subsequent heat treatment carried out at a temperature in a range from 100°
to 400°
C. for a duration of 1 to 30 minutes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification