Title:
DIP PLATING METHOD OF STEEL PRODUCT
Document Type and Number:
Japanese Patent JP3383186
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a production method of a steel product having sufficient corrosion resistance on a whole face of the steel product even in a severe corrosive environment and forming a plating layer in which a surface is flat and excellent in external appearance and which has a high product value.
SOLUTION: (1) After coating flux on a surface of a steel work, drying and by dipping in a dip plating bath (first bath) consisting of Zn and inevitable impurities, pre-Zn plating of ≥10 g/m2 is applied on the surface of the steel work and then the work is dipped in a dip plating bath (second bath) consisting of 0.1-15% Mg and the balance Zn with inevitable impurities. (2) The first bath contains 0.1-0.5% Al. (3) Pre-Zn plating is conducted by electrolytic plating. (4) A steel work, in which the Zn plating layer of ≥10 g/m2 on the surface is applied, is dipped in a dip plating bath consisting of 0.1-15% Mg and the balance Zn with inevitable impurities as mentioned in (1).
Inventors:
Hidetoshi New Head
Application Number:
JP17134897A
Publication Date:
March 04, 2003
Filing Date:
June 27, 1997
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C25D5/26; C23C2/02; C23C2/06; C23C28/02; (IPC1-7): C23C2/02; C23C2/06; C23C28/02; C25D5/26
Domestic Patent References:
| JP7207421A | ||||
| JP56152956A | ||||
| JP5318434A | ||||
| JP61295363A | ||||
| JP293053A | ||||
| JP42785A | ||||
| JP790617A |
Attorney, Agent or Firm:
Yu Shiina (1 person outside)