METHOD OF FORMING ELECTRODEPOSITION FILM AND METHOD OF FORMING MULTILAYER COATING FILM

Title:

METHOD OF FORMING ELECTRODEPOSITION FILM AND METHOD OF FORMING MULTILAYER COATING FILM

Document Type and Number:

Japanese Patent JP2009114468

Kind Code:

A

Abstract:

To provide a method of forming an electrodeposition film and a method of forming multilayer coating film suitable for coating a steel material on which chemical conversion treatment is not applied or a steel material having an edge part and/or a burr part.

The method of forming electrodeposition film include a step of electrodepositing a cationic electrodeposition coating material composition on the steel material on which the chemical conversion treatment is not applied and heating and curing the resultant electrodeposition film to obtain a cured electrodeposition film. The cationic electrodeposition coating material composition used in the electrodeposition coating film forming step contains a complex salt, a double salt or a mixed compound comprising: (a) molybdic acid; (b) a metal or the metal oxide selected from a group comprising zinc, cerium, bismuth, zirconium and yttrium wherein the ratio (a):(b) of metal elements (a) and (b) by weight is (1:99)-(50:50).

Inventors:

NAGAHATA SATOSHI
YAMADA MITSUO

Application Number:

JP2007285081A

Publication Date:

May 28, 2009

Filing Date:

November 01, 2007

Export Citation:

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Assignee:

NIPPON PAINT CO LTD

International Classes:

C25D13/10; B05D1/36; C09D5/44; C25D13/00; C25D13/06

Domestic Patent References:

JP2005199151A	2005-07-28
JP2006247614A	2006-09-21
JP2006169471A	2006-06-29
JP2006257268A	2006-09-28
JP2000317394A	2000-11-21

Foreign References:

WO2006022426A1

2006-03-02

Attorney, Agent or Firm:

Mitsuo Tanaka
Takuji Yamada
Muneo Yamamoto
Yuko Goto

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