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1. WO2020111889 - STEEL SHEET HAVING CORROSION RESISTANCE IN SULFURIC ACID AND SULFURIC ACID/HYDROCHLORIC ACID COMPOSITE CONDENSATION ENVIRONMENTS, AND MANUFACTURING METHOD THEREFOR

Publication Number WO/2020/111889
Publication Date 04.06.2020
International Application No. PCT/KR2019/016780
International Filing Date 29.11.2019
IPC
C22C 38/16 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
16containing copper
C22C 38/60 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
60containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
C22C 38/08 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
08containing nickel
C22C 38/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/12 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
12containing tungsten, tantalum, molybdenum, vanadium or niobium
C22C 38/04 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
CPC
C21D 8/02
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
02during manufacturing of plates or strips
C22C 38/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
C22C 38/06
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
06containing aluminium
C22C 38/08
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
08containing nickel
C22C 38/12
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
12containing tungsten, tantalum, molybdenum, vanadium, or niobium
Applicants
  • 주식회사 포스코 POSCO [KR]/[KR]
Inventors
  • 이병호 LEE, Byoung Ho
  • 조민호 JO, Minho
  • 홍영광 HONG, Young-Kwang
Agents
  • 유미특허법인 YOU ME PATENT AND LAW FIRM
Priority Data
10-2018-015297630.11.2018KR
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) STEEL SHEET HAVING CORROSION RESISTANCE IN SULFURIC ACID AND SULFURIC ACID/HYDROCHLORIC ACID COMPOSITE CONDENSATION ENVIRONMENTS, AND MANUFACTURING METHOD THEREFOR
(FR) TÔLE D'ACIER PRÉSENTANT UNE RÉSISTANCE À LA CORROSION DANS DES ENVIRONNEMENTS DE CONDENSATION D'ACIDE SULFURIQUE ET D'ACIDE SULFURIQUE/ACIDE CHLORHYDRIQUE ET SON PROCÉDÉ DE FABRICATION
(KO) 황산 및 황산/염산 복합 응축 환경에서 내식성을 갖는 강판 및 그 제조방법
Abstract
(EN)
The present invention relates to a steel sheet having corrosion resistance in sulfuric acid and sulfuric acid/hydrochloric acid composite environments, and a manufacturing method therefor. A corrosion resistant steel sheet according to one embodiment of the present invention comprises, by wt%, 0.15% or less of carbon (C) (excluding 0%), 0.05-0.5% of copper (Cu), 0.02-0.3% of nickel (Ni) and 0.05-0.45% of antimony (Sb), comprises at least one of 0.05-0.45% of tin (Sn), 0.05-0.2% of tungsten (W) and 0.2-1.45% of molybdenum (Mo), comprises the balance of iron (Fe) and inevitable impurities, and satisfies the following relation 1. [Relation 1] [Cu] + 3×[Sb] + 5×[Sn] + 5×[W] + [Mo] > 1 (wt%) (In relation 1, [Cu], [Sb], [Sn], [W] and [Mo] respectively mean the amounts (wt%) of Cu, Sb, Sn, W and Mo in the steel sheet.)
(FR)
La présente invention concerne une tôle d'acier présentant une résistance à la corrosion dans des environnements d'acide sulfurique et d'acide sulfurique/acide chlorhydrique et un procédé pour la fabriquer. Une tôle d'acier résistant à la corrosion selon un mode de réalisation de la présente invention comprend, en % en poids, 0,15 % de carbone (C) ou moins (en excluant 0 %), 0,05 à 0,5 % de cuivre (Cu), 0,02 à 0,3 % de nickel (Ni) et 0,05 à 0,45 % d'antimoine (Sb) et au moins un élément parmi 0,05 à 0,45 % d'étain (Sn), 0,05 à 0,2 % de tungstène (W) et 0,2 à 1,45 % de molybdène (Mo), le reste étant du fer (Fe) et des impuretés inévitables, et satisfait la relation 1 suivante. [Relation 1] [Cu] + 3×[Sb] + 5×[Sn] + 5×[W] + [Mo] > 1 (% en poids) (dans la relation 1, [Cu], [Sb], [Sn], [W] et [Mo] représentent respectivement les quantités (% en poids)) de Cu, Sb, Sn, W et Mo dans la tôle d'acier.)
(KO)
본 발명은 황산 및 황산/염산 복합 환경에서 내식성을 갖는 강판 및 그 제조방법에 관한 것이다. 본 발명의 일 실시예에 의한 내식성 강판은, 중량%로, 탄소(C): 0.15% 이하(0%를 제외함), 구리(Cu): 0.05 내지 0.5%, 니켈(Ni): 0.02 내지 0.3% 및 안티몬(Sb): 0.05 내지 0.45%을 포함하고, 주석(Sn): 0.05 내지 0.45%, 텅스텐(W): 0.05 내지 0.2%, 몰리브덴(Mo): 0.2 내지 1.45% 중 1종 이상을 포함하고, 잔부 철(Fe) 및 불가피한 불순물을 포함하고, 하기 식 1을 만족한다. [식 1] [Cu] + 3x[Sb] + 5x[Sn] + 5x[W] + [Mo] > 1 (wt%) (식 1에서, [Cu], [Sb], [Sn], [W], 및 [Mo]는 각각 강판에서의 Cu, Sb, Sn, W, 및 Mo의 함량(중량%)을 의미한다.)
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