Title:
STEEL SHEET HAVING CORROSION RESISTANCE IN LOW CONCENTRATION SULFURIC ACID/HYDROCHLORIC ACID COMPLEX CONDENSATION ATMOSPHERE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/111782
Kind Code:
A1
Abstract:
A corrosion-resistant steel sheet according to an embodiment of the present invention comprises: by weight, 0.15% or less (excluding 0%) of carbon (C); 0.5 to 1.5% of manganese (Mn); 0.05 to 0.2% of antimony (Sb); 0.03 to 0.45% of tin (Sn); at least one of tungsten (W) and copper (Cu), wherein tungsten (W) is contained alone in an amount of 0.45% or less (excluding 0%), copper (Cu) is contained alone in an amount of 0.005 to 0.05%, or a combination of tungsten (W) and copper (Cu) is contained in an amount of 0.005 to 0.5%; and the balance of iron (Fe) and inevitable impurities, and satisfies formula 1 below. [Formula 1] 5×[Sb] + 3×[Sn] + [W] - 2×[Cu] ≥ 0.70 (wherein, [Sb], [Sn], [W] and [Cu] denote contents (wt%) of Sb, Sn, W and Cu, respectively. In the case that W or Cu is not contained, [W] or [Cu] is 0.)
Inventors:
LEE BYOUNG HO (KR)
JO MINHO (KR)
HONG YOUNG-KWANG (KR)
JO MINHO (KR)
HONG YOUNG-KWANG (KR)
Application Number:
PCT/KR2019/016491
Publication Date:
June 04, 2020
Filing Date:
November 27, 2019
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/04; C21D8/02; C22C38/00; C22C38/12; C22C38/16; C22C38/60
Foreign References:
| JP2007262558A | 2007-10-11 | |||
| JP2007224377A | 2007-09-06 | |||
| JP2018150602A | 2018-09-27 | |||
| KR20120025591A | 2012-03-15 | |||
| JP2004263235A | 2004-09-24 |
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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