公开(公告)号：US20190264333A1

公开(公告)日：2019-08-29

申请号：US16309667

申请日：2017-06-14

申请人： POSCO ,  NOROO COIL COATINGS CO., LTD.

发明人： Soo-Hyoun CHO ,  Dae-Chul BAE ,  Dong-Yun KIM ,  Chang-Hyun PARK

IPC分类号： C23C22/42 ,  C23C22/44 ,  C23C2/06 ,  C23C2/26 ,  C23C2/40

摘要： Provided is a solution composition for steel sheet surface treatment, comprising 30 wt % to 60 wt % of a trivalent chromium compound containing chromium phosphate (A) and chromium nitrate (B); 0.2 wt % to 0.4 wt % of a rust-inhibiting and corrosion-resisting agent; 0.1 wt % to 0.3 wt % of a molybdenum-based compound; 5 wt % to 10 wt % of a water-soluble cationic urethane resin; 0.5 wt % to 2.0 wt % of a silane coupling agent; and 27.3 wt % to 64.2 wt % of water, a zinc-based plated steel sheet surface-treated with the same, and a manufacturing method therefor, the zinc-based plated steel sheet surface-treated with the solution composition for steel sheet surface treatment containing trivalent chromium may have an excellent effect on corrosion resistance, blackening resistance, fingerprint resistance, oil resistance, and alkali resistance.

公开(公告)号：US20220261646A1

公开(公告)日：2022-08-18

申请号：US17731862

申请日：2022-04-28

申请人： POSCO ,  NOROO COIL COATINGS CO., LTD.

发明人： Soo-Hyoun CHO ,  Dae-Chul BAE ,  Dong-Yun KIM ,  Chang-Hyun PARK

IPC分类号： G06N3/08 ,  G06N20/20 ,  G06N3/04 ,  G06T11/00

摘要： Provided is a solution composition for steel sheet surface treatment, comprising 30 wt % to 60 wt % of a trivalent chromium compound containing chromium phosphate (A) and chromium nitrate (B); 0.2 wt % to 0.4 wt % of a rust-inhibiting and corrosion-resisting agent; 0.1 wt % to 0.3 wt % of a molybdenum-based compound; 5 wt % to 10 wt % of a water-soluble cationic urethane resin; 0.5 wt % to 2.0 wt % of a silane coupling agent; and 27.3 wt % to 64.2 wt % of water, a zinc-based plated steel sheet surface-treated with the same, and a manufacturing method therefor, the zinc-based plated steel sheet surface-treated with the solution composition for steel sheet surface treatment containing trivalent chromium may have an excellent effect on corrosion resistance, blackening resistance, fingerprint resistance, oil resistance, and alkali resistance.

公开(公告)号：US20160313285A1

公开(公告)日：2016-10-27

申请号：US15102506

申请日：2013-12-24

申请人： POSCO

发明人： Ju-Seung LEE ,  Chang-Hyun PARK ,  Geon SHIN ,  Sang-Woo CHOI ,  Shin-Hwan KANG ,  Ho-Moon BAE ,  Ki-Jang OH

IPC分类号： G01N27/82

CPC分类号： G01N27/82

摘要： An aspect of the present disclosure may provide a defect detection apparatus and method for a steel plate, in which a defect in a steel plate may be detected, and particularly, only an inner defect in the steel plate may be detected, even with a relatively low amplification rate.

摘要翻译： 本公开的一个方面可以提供一种用于钢板的缺陷检测装置和方法，其中可以检测钢板中的缺陷，并且特别地，即使相对地也可以检测到钢板中的内部缺陷 低放大率。