公开(公告)号：US12221702B2

公开(公告)日：2025-02-11

申请号：US17288232

申请日：2019-10-17

Applicant: POSCO

Inventor： Soo-Hyoun Cho ,  Kang-Min Lee

IPC: C23C22/08 ,  B05D1/18 ,  B05D3/00 ,  B05D3/02 ,  B32B15/01 ,  B32B15/04 ,  B32B15/08 ,  B32B15/18 ,  C09D5/08 ,  C09D7/61 ,  C09D183/04 ,  C23C2/06 ,  C23C2/26 ,  C23C2/40 ,  C23C22/05 ,  C23C22/26 ,  C23C22/28 ,  C23C22/30 ,  C23C22/42 ,  C23C22/53 ,  C23C22/56 ,  C23C22/82 ,  C23C28/00 ,  C08K3/28 ,  C08K3/32 ,  C08K3/36 ,  C08K5/07 ,  C08K13/02 ,  C23C22/40

Abstract: Provided is a surface treatment solution composition comprising: 30 to 51 wt % of a trivalent chromium compound comprising chromium phosphate (A) and chromium nitrate (B) and having a content ratio of A/(A+B) that satisfies 0.3 to 0.6; 5 to 15 wt % of silane coupling agent; 0.2 to 3 wt % of vanadium-based anti-corrosive rust inhibitor; 3 to 12 wt % of colloidal silica; 0.5 to 5 wt % of polysiloxane copolymer; and 14 to 61.3 wt % of water, a hot dip galvanized steel sheet surface-treated using same, and a manufacturing method thereof. The hot dip galvanized steel sheet treated with the surface treatment solution composition containing trivalent chromium has an excellent corrosion resistance, blackening resistance, pipe-forming oil reactivity, and alkali resistance.

公开(公告)号：US11634818B2

公开(公告)日：2023-04-25

申请号：US16763363

申请日：2018-11-13

Applicant: POSCO

Inventor： Soo-Hyoun Cho ,  Won-Ho Son

IPC: C23C22/42 ,  C23C2/26 ,  C23C2/40 ,  C23C22/47 ,  C23C22/73 ,  C23C22/82 ,  C23C28/00

Abstract: A surface treatment solution composition for forming an inorganic film, comprising: 10 to 30% by weight of a trivalent chromium compound containing chromium phosphate (A) and chromium nitrate (B) and satisfying a content ratio A/(A+B) of 0.3 to 0.6; 5 to 50% by weight of a silane compound; 0.2 to 3% by weight of a vanadium-based rust-inhibiting and corrosion-resisting agent; 0.5 to 5% by weight of a cobalt-based rust-inhibiting and corrosion-resisting agent; and 12 to 84.3% by weight of water, an alloyed hot-dip galvanized steel sheet surface-treated using the composition, and a method for manufacturing the alloyed hot-dip galvanized steel sheet, are provided, and the surface treatment solution composition containing the trivalent chromium compound has an excellent effect on corrosion resistance, blackening resistance, fuel resistance, weldability, and alkali resistance.

公开(公告)号：US20250051929A1

公开(公告)日：2025-02-13

申请号：US18721631

申请日：2022-12-19

Applicant: POSCO CO., LTD

Inventor： Chang-Hoon Choi ,  Soo-Hyoun Cho ,  Tae-Chul Kim ,  Sung-Joo Kim

IPC: C23C28/00 ,  C23C2/06 ,  C23C2/26 ,  C23C22/50

Abstract: The present invention relates to a solution composition capable of improving pitting corrosion resistance and blackening resistance of a steel sheet, a steel sheet surface-treated using same, and a method for manufacturing the steel sheet.

公开(公告)号：US12194491B2

公开(公告)日：2025-01-14

申请号：US17762964

申请日：2020-09-23

Applicant: POSCO

Inventor： Soo-Hyoun Cho ,  Won-Ho Son

IPC: B05D1/18 ,  C09D5/10 ,  C09D175/04 ,  C09D183/04 ,  C23C2/26

Abstract: The present invention relates to a surface treatment composition comprising, on the basis of 100 wt % of the solid part of the composition, 20-40 wt % of a water-soluble polyurethane resin, 40-60 wt % of a silane-based sol-gel resin in which three types of silane compounds are cross-linked, 5-15 wt % of a curing agent, 0.5-1.5 wt % of a corrosion inhibitor, 0.1-1.0 wt % of a molybdenum-based compound, 1.0-3.0 wt % of a silane coupling agent; 1.0-2.0 wt % of an organometallic complex, 1.0-2.0 wt % of an acid scavenger, 0.1-1.0 wt % of an aluminum-based compound, and 1.0-2.0 wt % of a lubricant. A ternary hot-dip galvannealed steel sheet treated with a chromium-free surface treatment coating agent, according to an exemplary embodiment in the present invention, has excellent resistance to blackening, alkali and corrosion, and provides excellent effects without concern for problems, in chromium treatment, of additional equipment installation, an increase in manufacturing costs and environmental pollution.

公开(公告)号：US20220371049A1

公开(公告)日：2022-11-24

申请号：US17762964

申请日：2020-09-23

Applicant: POSCO

Inventor： Soo-Hyoun Cho ,  Won-Ho Son

IPC: B05D1/18 ,  C09D175/04 ,  C09D183/04 ,  C09D5/10

Abstract: The present invention relates to a surface treatment composition comprising, on the basis of 100 wt % of the solid part of the composition, 20-40 wt % of a water-soluble polyurethane resin, 40-60 wt % of a silane-based sol-gel resin in which three types of silane compounds are cross-linked, 5-15 wt % of a curing agent, 0.5-1.5 wt % of a corrosion inhibitor, 0.1-1.0 wt % of a molybdenum-based compound, 1.0-3.0 wt % of a silane coupling agent; 1.0-2.0 wt % of an organometallic complex, 1.0-2.0 wt % of an acid scavenger, 0.1-1.0 wt % of an aluminum-based compound, and 1.0-2.0 wt % of a lubricant. A ternary hot-dip galvannealed steel sheet treated with a chromium-free surface treatment coating agent, according to an exemplary embodiment in the present invention, has excellent resistance to blackening, alkali and corrosion, and provides excellent effects without concern for problems, in chromium treatment, of additional equipment installation, an increase in manufacturing costs and environmental pollution.

公开(公告)号：US10822705B2

公开(公告)日：2020-11-03

申请号：US16339888

申请日：2017-09-29

Applicant: POSCO

Inventor： Soo-Hyoun Cho ,  Won-Ho Son ,  Chang-Hoon Choi

IPC: B32B15/08 ,  C23C22/42 ,  C23C22/82 ,  C09D5/08 ,  C23C2/40 ,  C23C22/40 ,  C09D4/00 ,  C23C2/06 ,  C23C2/26 ,  C23C22/05 ,  C23C22/53

Abstract: Provided is a surface-treating solution composition, a zinc-based plated steel sheet surface-treated using the same, and a method for producing the same, wherein the surface-treatment solution composition includes: 10 wt % to 20 wt % of a trivalent chromium compound containing chromium phosphate (A) and chromium nitrate (B), the content ratio thereof, A/(A+B), satisfying 0.3 to 0.6; 20 wt % to 40 wt % of a silane-based sol-gel resin in which three types of silane compounds are crosslinked; 0.2 wt % to 0.4 wt % of a rust-inhibiting and corrosion-resistant 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; 0.5 wt % to 2.0 wt % of an Al compound; and 25.3 wt % to 63.7 wt % of water. The zinc-based plated steel sheet surface-treated with the surface-treatment solution composition containing trivalent chromium has an excellent effect on corrosion resistance, blackening resistance, fingerprint resistance, piping oil infiltration, and alkali resistance.

公开(公告)号：US20240417860A1

公开(公告)日：2024-12-19

申请号：US18698614

申请日：2021-10-14

Applicant: POSCO CO., LTD

Inventor： Soo-Hyoun Cho ,  Won-Ho Son

IPC: C23F11/18 ,  C09D5/08 ,  C09D7/20 ,  C09D7/48 ,  C09D7/61 ,  C09D163/00 ,  C09D175/04 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28

Abstract: The objective of the present invention is to provide a surface treatment composition capable of imparting excellent corrosive resistance, blackening resistance, alkali resistance, and an intrinsic surface color property on a ternary hot dip galvanized steel sheet. The present invention provides a surface treatment composition comprising, with respect to 100% by weight of the solid content of the composition: 70-90% by weight of a resin mixture including a high molecular weight polysilicon-modified polyurethane main resin, a low molecular weight polysilicon-modified polyurethane auxiliary resin, and an auxiliary epoxy resin; 0.5-10% by weight of a tarnish inhibitor; 0.5-10% by weight of an adhesion promoter; 0.5-10% by weight of an anticorrosive agent; 0.1-2% by weight of a coloring pigment; and 0.1-1% by weight of a pigment stabilizer.

公开(公告)号：US20230348732A1

公开(公告)日：2023-11-02

申请号：US18024132

申请日：2021-09-02

Applicant: POSCO Co., Ltd

Inventor： Soo-Hyoun Cho ,  Won-Ho Son

IPC: C23C2/40 ,  C23C2/26 ,  C09D175/00 ,  C09D7/65 ,  C23C2/06 ,  C08K5/23 ,  C09D7/41 ,  C09D7/20 ,  C09D5/08 ,  C23C2/12

CPC classification number: C09D5/08 ,  C08K5/23 ,  C09D7/20 ,  C09D7/41 ,  C09D7/65 ,  C09D175/00 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C23C2/40

Abstract: The present disclosure is to provide a surface treatment composition that may impart excellent corrosion resistance, blackening resistance, and alkali resistance, and an intrinsic surface color property to a ternary hot-dip galvannealed steel sheet. The present disclosure provides a surface treatment composition containing: based on 100 wt% of a solid content of the composition, 70 to 90 wt% of a resin mixture including a high molecular weight polysilicon-modified polyurethane main resin, a low molecular weight polysilicon-modified polyurethane auxiliary resin, and an acrylic urethane auxiliary resin; 5 to 25 wt% of a melamine-based curing agent; 0.5 to 10 wt% of an inorganic additive; 0.5 to 10 wt% of a silane coupling agent; 0.1 to 2 wt% of an adhesion promoter; 0.1 to 2 wt% of a coloring pigment; and 0.1 to 1 wt% of a pigment stabilizer.

公开(公告)号：US11634819B2

公开(公告)日：2023-04-25

申请号：US17731862

申请日：2022-04-28

Applicant: POSCO ,  NOROO COIL COATINGS CO., LTD.

Inventor： Soo-Hyoun Cho ,  Dae-Chul Bae ,  Dong-Yun Kim ,  Chang-Hyun Park

IPC: C23C22/42 ,  C23C2/06 ,  C23C2/26 ,  C23C2/40 ,  C23C22/44 ,  C09D5/08 ,  C23C22/40 ,  C09D5/10 ,  C22C18/04 ,  C22C18/00 ,  C23C22/07 ,  G06N20/20 ,  G06N3/04 ,  G06N3/08 ,  G06T11/00

Abstract: 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：US11346003B2

公开(公告)日：2022-05-31

申请号：US16309667

申请日：2017-06-14

Applicant: POSCO ,  NOROO COIL COATINGS CO., LTD.

Inventor： Soo-Hyoun Cho ,  Dae-Chul Bae ,  Dong-Yun Kim ,  Chang-Hyun Park

IPC: C23C22/42 ,  C23C2/06 ,  C23C2/26 ,  C23C2/40 ,  C23C22/44 ,  C09D5/08 ,  C23C22/40 ,  C09D5/10 ,  C22C18/04 ,  C22C18/00 ,  C23C22/07

Abstract: 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.