ZINC ALLOY PLATED STEEL SHEET AND ITS PRODUCTION

Title:

ZINC ALLOY PLATED STEEL SHEET AND ITS PRODUCTION

Document Type and Number:

Japanese Patent JPH0711479

Kind Code:

A

Abstract:

PURPOSE: To obtain excellent plating adhesion even under the severe conditions where a zinc alloy electroplated steel sheet, to which three-coat coating for automobile is applied, is liable to cause the peeling off of a plating layer due to pebbles and rock salt in a cold district.

CONSTITUTION: The surface of a steel sheet 1 is coated with a nickel alloy at (1 to 1000)mg/m2 nickel coating weight. The nickel alloy coated steel sheet is heated, by which a part or the whole of the nickel alloy is allowed to diffuse and penetrate into the steel sheet and a nickel diffused region 2 where nickel coating weight is regulated to (1 to 1000)mg/m2 is formed. A zinc alloy plating layer 3 is formed on the above. This steel sheet has superior low temp. chipping resistance.

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Inventors:

SHIOBARA YUKIMITSU
ABE MASAKI
KAGECHIKA HIROSHI

Application Number:

JP15648493A

Publication Date:

January 13, 1995

Filing Date:

June 28, 1993

Export Citation:

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Assignee:

NIPPON KOKAN KK

International Classes:

C23C10/28; C23F13/00; C25D3/56; C25D5/26; C25D5/50; (IPC1-7): C25D5/26; C23C10/28; C23F13/00; C25D5/50

Attorney, Agent or Firm:

Takehiko Suzue

Next Patent: ELECTROPLATING METHOD