Nippon Steel Nisshin Co., Ltd.

Yuuki Sakuraba

Masaki Yamamoto

Toshiaki Sato

Ichiro Takahashi

Tadashi Nakano

Hiroyuki Nakamizo

Shinichi Kajimoto

Noboru Suzuki

Masahiko Tsuchiyama

Yuusuke Murai

Yoshinobu Kurisu

Yoshitaka Yukura

Tsutomu Ohta

The present invention provides a method for manufacturing more beautiful black coated steel sheets by uniformly blackening the coating layer. Specifically, the present invention provides a method for manufacturing black coated steel sheets, which brings Zn&#x2014;Al&#x2014;Mg alloy coated steel sheets () into contact with steam in a closed container (), wherein said closed container () can maintain a predefined internal pressure through variable control of the amount of steam flowing into said closed container () and/or the amount of steam flowing out of said closed container (), and in said closed container () that can maintain said predefined pressure, said Zn&#x2014;Al&#x2014;Mg alloy coated steel sheets () have contact with the steam introduced into said closed container ().

Method and device for manufacturing black coated steel sheets

Growing community of inventors

Tokyo, Japan

Yuuki Sakuraba