Effect of resin coating on electropainting behaviour of organic coated steel sheets

Hiroaki Nakano, Kazuo Okumura, Hiroaki Tsubakino, Tadashige Nakamoto, Kenji Miki

Research output: Contribution to journalArticle

Abstract

Thin organic coated steel sheets have been electropainted for home electrical appliances. Therefore, it is important to make clear the exact mechanism of electropainting on organic coating. In this study, the effect of resin coating on electropainting behaviour of thin organic coated steel sheets was investigated by using an acrylic cationic electropaint for one-coat finish. Measurement an initial current of electropainting, observation of uncured as-deposited paint film by video microscope system and counting of conductive points of organic coated steel sheets were conducted. When resin coating weight of organic coated steel sheets is large, bubbles are left in the paint film, the paint film thickness increase largely and surface of the paint film becomes rough. The reason is that microscopic conductive points of the organic coated steel sheets decrease and electrodeposited paint film becomes random in thickness at the initial stage of electropainting. So the electropainting current concentrates locally on the spots where the paint film is thin, then thick and porous paint film which contains bubbles is formed. It is clear that the electropaintability of organic coated steel sheets depends on the morphology of initially deposited paint film. Therefore, it is possible to improve electropaintability by controlling the microscopic conductive points of resin coating.

Original languageEnglish
Pages (from-to)319-324
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume85
Issue number4
DOIs
Publication statusPublished - Jan 1 1999

Fingerprint

paints
Steel sheet
Paint
resins
Resins
steels
coatings
Coatings
bubbles
Organic coatings
Acrylics
Film thickness
counting
Microscopes
film thickness
microscopes
Thin films
thin films

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Cite this

Effect of resin coating on electropainting behaviour of organic coated steel sheets. / Nakano, Hiroaki; Okumura, Kazuo; Tsubakino, Hiroaki; Nakamoto, Tadashige; Miki, Kenji.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 85, No. 4, 01.01.1999, p. 319-324.

Research output: Contribution to journalArticle

Nakano, Hiroaki ; Okumura, Kazuo ; Tsubakino, Hiroaki ; Nakamoto, Tadashige ; Miki, Kenji. / Effect of resin coating on electropainting behaviour of organic coated steel sheets. In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan. 1999 ; Vol. 85, No. 4. pp. 319-324.
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