Title:
STEEL PIPE SUPERIOR IN CORROSION RESISTANCE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2007070725
Kind Code:
A
Abstract:
To provide a steel pipe having a surface plated so as to have further improved corrosion resistance, and to provide a manufacturing method therefor.
The method for manufacturing the steel pipe superior in corrosion resistance comprises: the first step of preheating a steel pipe shaped in a pipe production process; the second step of providing a reductive atmosphere while keeping a temperature of the preheated steel pipe at a predetermined temperature or higher; the third step of melting an alloy containing 55 mass% aluminum and 43.4 to 44.9 mass% zinc, and plating the surface of the steel pipe with the melted alloy; the fourth step of cooling the steel pipe; and the fifth step of coating the surface of the steel pipe with a resin.
Inventors:
KIM GI HYEOUG
KIM SUN CHANG
SIM JAE PYEONG
KIM SUN CHANG
SIM JAE PYEONG
Application Number:
JP2006186782A
Publication Date:
March 22, 2007
Filing Date:
July 06, 2006
Export Citation:
Assignee:
KOREA BUNDY CO LTD
International Classes:
C23C2/12; B05D7/14; C23C2/26; C23C2/38
Attorney, Agent or Firm:
Sadao Kumakura
Nobuo Ogawa
Atsushi Hakoda
Kenji Asai
Koji Hirayama
Nobuo Ogawa
Atsushi Hakoda
Kenji Asai
Koji Hirayama