Title:
ELECTRODEPOSITION COATING METHOD AND ELECTRODEPOSITION COATING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/146445
Kind Code:
A1
Abstract:
This electrodeposition coating method comprises a degreasing and cleaning step, a chemical conversion step, and an electrodeposition coating layer formation step. The degreasing and cleaning step comprises a degreasing step wherein an object to be coated is immersed in a degreasing solution and the degreasing solution is ultrasonically vibrated by means of an ultrasonic transducer. The electrodeposition coating layer formation step comprises: a first electrodeposition step; a first water washing step; a cleaning water removal or reduction step wherein cleaning water on a cleaning water stagnation surface of the object to be coated is removed or reduced; a thermal flow step wherein a first electrodeposition coating film, which has been formed on the object to be coated, is subjected to a thermal flow so that the electrical resistance of the first electrodeposition coating film formed in a portion close to a first counter electrode is higher than the electrical resistance of the first electrodeposition coating film formed in a portion far from the first counter electrode; and a second electrodeposition step.
Inventors:
SHINODA MASAFUMI (JP)
MATSUI HIROKI (JP)
MATSUI HIROKI (JP)
Application Number:
PCT/JP2019/000886
Publication Date:
August 01, 2019
Filing Date:
January 15, 2019
Export Citation:
Assignee:
MAZDA MOTOR (JP)
International Classes:
C25D13/14; C25D13/00; C25D13/20; C25D13/22; C25D13/24; F26B9/00; F26B21/04
Foreign References:
| JP2010100906A | 2010-05-06 | |||
| JP2018016867A | 2018-02-01 |
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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