Kabushiki Kaisha Kobe Seiko Sho

Toyota Jidosha Kabushiki Kaisha

Nagisa Takee

Jun Hisamoto

Kouki Ikeda

Hiroshi Sato

Hideo Fujimoto

Akihiro Tsuruno

Masao Takemoto

Toshiki Ueda

Masahiro Kawaguchi

Eiki Usui

Kikuo Toyose

Souichi Hayashi

Asao Mochizuki

Masamichi Aono

Toshihiro Chikada

Kikurou Toyose

Surface-treated Al or Al alloy materials which excel in adhesive property, formability, weldability, phosphatability, paint adhesion, and post-painting corrosion resistance are provided by forming a coated layer containing Zn and Fe or one or more of Si oxides, Al oxides and Al hydroxides together therewith, on the surface of Al or Al alloy base. The surface-treated Al or Al alloy materials are useful as metallic material to be painted and used after press forming and other processing, spot or laser welding and phosphating, including panel materials for automobiles and other various vehicles, shells for housefold electrical apparatus, and building materials.

Surface treated aluminum or aluminum alloy material

An aluminum alloy material having a surface suitable for zinc phosphate processing prepared by a process comprising the steps of (1) cleaning the aluminum alloy surface, and (2) forming a composite film layer comprising Zn metal, Ni or Mn metal, and silicon oxide on the surface of the aluminum alloy.

Aluminum alloy material having a surface of excellent zinc phosphate

The present invention discloses a surface treated material of excellent adhesion for painting layer, corrosion resistance after painting and press formability, containing, in a Zn or Fe series plating layer, a (meth)acrylic polymer having repeating units of a (meth)acrylic acid derivative in which a compound having an epoxy group is added to a chemical formula represented by: ##STR1## where X represents --NH-- or --O--, A represents C.sub.n H.sub.2n, n is 0 or a positive integer, R represents --H or --CH.sub.3, and R.sub.1, R.sub.2 which may be identical or different with each other represents H or alkyl group.

Surface treated materials of excellent adhesion for painting layer,

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Nishinomiya, Japan

Nagisa Takee