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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12618139 B1

PDFFull Text
Date of Patent:
May. 05, 2026

Filed:

Aug. 23, 2024

Manufacturing method for plated steel material having excellent adhesion to plating and corrosion resistance

Applicant:

Posco Co., Ltd, Pohang-si, KR;

Inventors:

Seok-Jun Hong, Gwangyang-si, KR;

Woo-Sung Jung, Gwangyang-si, KR;

Assignee:

POSCO CO., LTD, Pohang-si, KR;

Attorney:

CANTOR COLBURN LLP

Primary Examiner:

Michael E La Villa

Int. Cl.
CPC ...
C23C 30/00 (2006.01); B32B 15/01 (2006.01); B32B 15/04 (2006.01); B32B 15/18 (2006.01); C23C 14/02 (2006.01); C23C 14/06 (2006.01); C23C 14/14 (2006.01); C23C 14/16 (2006.01); C23C 14/24 (2006.01); C23C 14/54 (2006.01); C23C 14/58 (2006.01); C23C 28/00 (2006.01); C23C 28/02 (2006.01);
U.S. Cl.
CPC ...
C23C 14/16 (2013.01); B32B 15/01 (2013.01); B32B 15/013 (2013.01); B32B 15/04 (2013.01); B32B 15/043 (2013.01); B32B 15/18 (2013.01); C23C 14/024 (2013.01); C23C 14/025 (2013.01); C23C 14/06 (2013.01); C23C 14/14 (2013.01); C23C 14/24 (2013.01); C23C 14/541 (2013.01); C23C 14/542 (2013.01); C23C 14/58 (2013.01); C23C 14/5806 (2013.01); C23C 14/5893 (2013.01); C23C 28/02 (2013.01); C23C 28/021 (2013.01); C23C 28/023 (2013.01); C23C 28/025 (2013.01); C23C 28/3225 (2013.01); C23C 30/00 (2013.01); C23C 30/005 (2013.01); Y10T 428/12799 (2015.01); Y10T 428/12951 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/2495 (2015.01); Y10T 428/24959 (2015.01); Y10T 428/24967 (2015.01); Y10T 428/265 (2015.01);
Abstract

Provided is a method of manufacturing a Zn—Mg alloy plated steel having excellent plating adhesion and corrosion resistance. The method includes: sequentially forming a first Zn plating layer, a second Mg plating layer, and a third Zn plating layer on base steel by a physical vapor deposition (PVD) method to provide a plated steel material; heating the plated steel material for alloying heat treatment to provide an alloy plated steel material; and cooling the alloy plated steel material. In the providing of the plated steel material, the second Mg plating layer has a thickness of 30% to 35% of the sum of thicknesses of the first Zn plating layer, the second Mg plating layer, and the third Zn plating layer, and the first Zn plating layer has a thickness of 1.1 to 4 times a thickness of the third Zn plating layer.

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