Nippon Steel Corporation

Sony Corporation

Z. I. Nekrasov Iron & Steel Institute of the National Academy of Sciences of Ukraine

Naoto Sasaki

Takashi Fujii

Koji Morita

Naoki Ogawa

Kohei Ueda

Akira Nakagawa

Takehiko Toh

Takashi Oinoue

Fumio Shibao

Yuki Yamamura

Hiroyasu Furukawa

Kenichiro Naito

Michitaka Matsuo

Masamitsu Wakoh

Hiroshi Hirata

Kazuo Onuki

Sohichi Niino

S I Semykin

Kiyokazu Tateishi

Semykin S I

To further improve, even under OT bending with the use of a Zn—Al—Mg-based alloy plated steel sheet as a base sheet, corrosion resistance regarding corrosion under paint film at a OT bent portion and a periphery thereof, without causing occurrence of cracks and peeling in the paint film. A pre-coated plated steel sheet according to the present invention includes: a plating layer composed of Zn—Al—Mg-based alloy plating, the plating layer being positioned on one side or both sides of a steel sheet; a chemical treatment film layer positioned on the plating layer; and a paint film layer positioned on the chemical treatment film, in which the paint film layer includes a primer paint film layer, and an upper paint film layer positioned on the primer paint film layer, and at least any of the following is satisfied: both a condition (a-1) and a condition (a-2); a condition (b); and a condition (c).

Pre-coated plated steel sheet and molded product

To more securely inhibit the occurrence of paint film floating even when drawing is performed by using a Zn—Al—Mg-based alloy plated steel sheet as a base sheet. A pre-coated plated steel sheet according to the present invention includes: a plating layer composed of Zn—Al—Mg-based alloy plating, the plating layer being positioned on one side or both sides of a steel sheet; a chemical treatment film layer positioned on the plating layer; and a paint film layer positioned on the chemical treatment film, in which the paint film layer includes a primer paint film layer, and an upper paint film layer positioned on the primer paint film layer, and at least any of the following is satisfied: both a condition (a-1) and a condition (a-2); a condition (b); and a condition (c).

Growing community of inventors

Tokyo, Japan

Naoto Sasaki