EP4455362A4 - Composition de solution pour le traitement de surface d'une tôle d'acier, tôle d'acier traitée en surface l'utilisant, et son procédé de fabrication - Google Patents

Composition de solution pour le traitement de surface d'une tôle d'acier, tôle d'acier traitée en surface l'utilisant, et son procédé de fabrication

Info

Publication number: EP4455362A4
Authority: EP; European Patent Office
Prior art keywords: steel sheet; manufacturing; same; solution composition; surface treatment
Prior art date: 2021-12-20
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Pending

Application number

EP22911846.8A

Other languages

German (de)

English (en)

Other versions

EP4455362A1 (fr

Inventor

Chang-Hoon Choi

Jong-Kook Kim

Soo-Hyoun Cho

Ho-Cheol Song

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Unicoh Specialty Chemicals Co Ltd

Posco Holdings Inc

Original Assignee

Unicoh Specialty Chemicals Co Ltd

Posco Co Ltd

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2021-12-20

Filing date

2022-12-20

Publication date

2025-05-07

2022-12-20 Application filed by Unicoh Specialty Chemicals Co Ltd, Posco Co Ltd filed Critical Unicoh Specialty Chemicals Co Ltd

2024-10-30 Publication of EP4455362A1 publication Critical patent/EP4455362A1/fr

2025-05-07 Publication of EP4455362A4 publication Critical patent/EP4455362A4/fr

Status Pending legal-status Critical Current

Links

Classifications

- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/50—Treatment of iron or alloys based thereon
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/53—Treatment of zinc or alloys based thereon
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/10—Use of solutions containing trivalent chromium but free of hexavalent chromium
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes

Landscapes

Chemical & Material Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
General Chemical & Material Sciences (AREA)
Inorganic Chemistry (AREA)
Chemical Treatment Of Metals (AREA)
Other Surface Treatments For Metallic Materials (AREA)

EP22911846.8A 2021-12-20 2022-12-20 Composition de solution pour le traitement de surface d'une tôle d'acier, tôle d'acier traitée en surface l'utilisant, et son procédé de fabrication Pending EP4455362A4 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
KR1020210182935A KR20230093920A (ko)	2021-12-20	2021-12-20	강판 표면처리용 용액 조성물, 이를 이용하여 표면처리된 강판 및 그 제조방법
PCT/KR2022/020821 WO2023121213A1 (fr)	2021-12-20	2022-12-20	Composition de solution pour le traitement de surface d'une tôle d'acier, tôle d'acier traitée en surface l'utilisant, et son procédé de fabrication

Publications (2)

Publication Number	Publication Date
EP4455362A1 EP4455362A1 (fr)	2024-10-30
EP4455362A4 true EP4455362A4 (fr)	2025-05-07

Family

ID=86903396

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP22911846.8A Pending EP4455362A4 (fr)	2021-12-20	2022-12-20	Composition de solution pour le traitement de surface d'une tôle d'acier, tôle d'acier traitée en surface l'utilisant, et son procédé de fabrication

Country Status (5)

Country	Link
EP (1)	EP4455362A4 (fr)
JP (1)	JP7797658B2 (fr)
KR (1)	KR20230093920A (fr)
CN (1)	CN118451213A (fr)
WO (1)	WO2023121213A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2025243788A1 (fr) *	2024-05-24	2025-11-27	日本製鉄株式会社	Matériau d'acier traité en surface

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1199376A1 (fr) *	1999-05-24	2002-04-24	Nippon Steel Corporation	Produit d'acier plaque, feuille d'acier plaquee et feuille d'acier prerevetue possedant une excellente resistance a la corrosion
EP3524711A1 (fr) *	2016-10-10	2019-08-14	Posco	Composition de traitement de surface de type solution contenant du chrome trivalent et un composé inorganique, tôle en acier plaquée à base de zinc traitée en surface l'utilisant, et son procédé de production
EP4442857A1 (fr) *	2021-11-30	2024-10-09	POSCO Co., Ltd	Composition pour le traitement de surface d'une tôle d'acier galvanisée par immersion à chaud ternaire présentant une résistance à la corrosion et une stabilité environnementale excellentes, une tôle d'acier galvanisée par immersion à chaud ternaire qui est traitée en surface à l'aide de ladite composition, et son procédé de fabrication

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP3179446B2 (ja)	1998-07-02	2001-06-25	新日本製鐵株式会社	耐食性に優れためっき鋼板と塗装鋼板及びその製造方法
JP2002069660A (ja)	2000-08-28	2002-03-08	Nippon Parkerizing Co Ltd	６価クロムを含まない水系金属表面処理剤及びそれで処理した表面処理金属板
KR100421894B1 (ko)	2001-02-27	2004-03-10	엘지전자 주식회사	공기조화기용 어큐뮬레이터 구조
KR100490954B1 (ko)	2002-11-27	2005-05-24	이덕진	6가 크롬 및 산화제를 포함하지 않는 3가 크로메이트 용액 및 이의 제조 방법
KR20090024450A (ko)	2007-09-04	2009-03-09	주식회사 에임하이글로벌	부착 방지용 투명 필름 및 이의 제조방법
ATE544881T1 (de) *	2008-06-17	2012-02-15	Pangang Group Res Inst Co Ltd	Zusammensetzung mit kieselsäurensol, verfahren zu ihrer herstellung und die zusammensetzung verwendendes verzinktes selbstschmierendes metallmaterial
CN102257178B (zh) *	2008-12-16	2014-05-07	日本帕卡濑精株式会社	金属材料用表面处理剂
KR101613952B1 (ko) *	2014-03-26	2016-04-21	징코텍 주식회사	수용성 방식용 코팅 조성물
KR20180135514A (ko) *	2017-06-12	2018-12-21	주식회사 포스코	강판 표면처리용 조성물, 이를 이용한 표면처리강판 및 이의 제조방법
KR102142771B1 (ko)	2018-10-24	2020-08-07	주식회사 포스코	3가 크롬 및 무기화합물을 함유한 표면처리 용액 조성물, 이를 이용하여 표면 처리된 용융아연 도금강판 제조방법
JP7315826B2 (ja)	2019-06-27	2023-07-27	日本製鉄株式会社	めっき鋼材、およびめっき鋼材の製造方法
CN111876782A (zh) *	2020-07-21	2020-11-03	福建华杰电气科技有限公司	一种表面处理液

2021
- 2021-12-20 KR KR1020210182935A patent/KR20230093920A/ko active Pending
2022
- 2022-12-20 JP JP2024537521A patent/JP7797658B2/ja active Active
- 2022-12-20 WO PCT/KR2022/020821 patent/WO2023121213A1/fr not_active Ceased
- 2022-12-20 CN CN202280084746.8A patent/CN118451213A/zh active Pending
- 2022-12-20 EP EP22911846.8A patent/EP4455362A4/fr active Pending

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1199376A1 (fr) *	1999-05-24	2002-04-24	Nippon Steel Corporation	Produit d'acier plaque, feuille d'acier plaquee et feuille d'acier prerevetue possedant une excellente resistance a la corrosion
EP3524711A1 (fr) *	2016-10-10	2019-08-14	Posco	Composition de traitement de surface de type solution contenant du chrome trivalent et un composé inorganique, tôle en acier plaquée à base de zinc traitée en surface l'utilisant, et son procédé de production
EP4442857A1 (fr) *	2021-11-30	2024-10-09	POSCO Co., Ltd	Composition pour le traitement de surface d'une tôle d'acier galvanisée par immersion à chaud ternaire présentant une résistance à la corrosion et une stabilité environnementale excellentes, une tôle d'acier galvanisée par immersion à chaud ternaire qui est traitée en surface à l'aide de ladite composition, et son procédé de fabrication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2023121213A1 *

Also Published As

Publication number	Publication date
WO2023121213A1 (fr)	2023-06-29
CN118451213A (zh)	2024-08-06
JP2024546377A (ja)	2024-12-20
KR20230093920A (ko)	2023-06-27
JP7797658B2 (ja)	2026-01-13
EP4455362A1 (fr)	2024-10-30

Legal Events

Date	Code	Title	Description
2023-07-01	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE
2024-09-27	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
2024-09-27	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE
2024-10-30	17P	Request for examination filed	Effective date: 20240621
2024-10-30	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
2025-03-26	DAV	Request for validation of the european patent (deleted)
2025-03-26	DAX	Request for extension of the european patent (deleted)
2025-05-07	A4	Supplementary search report drawn up and despatched	Effective date: 20250407
2025-05-07	RIC1	Information provided on ipc code assigned before grant	Ipc: C23C 22/83 20060101ALI20250401BHEP Ipc: C23C 22/53 20060101ALI20250401BHEP Ipc: C23C 22/50 20060101ALI20250401BHEP Ipc: C23C 28/00 20060101ALI20250401BHEP Ipc: C23C 22/06 20060101AFI20250401BHEP

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