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Surface modified galvanized steel sheet

US12188129B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-12188129-B2
Application numberUS-202118019567-A
CountryUS
Kind codeB2
Filing dateAug 24, 2021
Priority dateSep 8, 2020
Publication dateJan 7, 2025
Grant dateJan 7, 2025

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  1. Title

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  2. Abstract

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  3. Assignees and inventors

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  4. Key dates

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  5. First independent claim

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  6. CPC / IPC classifications

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  7. Citations and related patents

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Abstract

Official abstract text for this publication.

A galvanized steel sheet according to one aspect of the present invention comprises: a base steel sheet; and a Zn—Al—Mg-based plating layer provided on at least one surface of the base steel sheet, wherein the Zn—Al—Mg-based plating layer may include a surface modified region enriched with cerium (Ce) on a surface layer side of the Zn—Al—Mg-based plating layer.

First claim

Opening claim text (preview).

The invention claimed is: 1. A galvanized steel sheet comprising: a base steel sheet; and a Zn—Al—Mg-based plating layer provided on at least one surface of the base steel sheet, wherein the Zn—Al—Mg-based plating layer includes a surface modification region enriched with cerium (Ce) on a surface layer side of the Zn—Al—Mg-based plating layer, and wherein the surface modification region comprises: a convex portion provided by zinc-cerium nitrate salt (Zn—Ce—NO 3 —H 2 O) attached to a surface layer of the Zn—Al—Mg-based plating layer; and a concave portion provided by removing magnesium (Mg) of the surface layer of the Zn—Al—Mg-based plating layer. 2. The galvanized steel sheet of claim 1 , wherein an adhesion amount of the zinc-cerium nitrate salt (Zn—Ce—NO 3 —H 2 O) is 0.01 to 2.5 g/m 2 . 3. The galvanized steel sheet of claim 1 , wherein a surface roughness of the surface modification region is 1.2-1.6 μm based on a center line average roughness (Ra). 4. The galvanized steel sheet of claim 1 , wherein the Zn—Al—Mg-based plating layer comprises, by weight %, 0.1 to 16% of magnesium (Mg), 0.1 to 12% of aluminum (Al), 0.0005 to 1.5% of cerium (Ce), remainder zinc (Zn) and unavoidable injuries.

Assignees

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Frequently asked questions

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What does patent US12188129B2 cover?
A galvanized steel sheet according to one aspect of the present invention comprises: a base steel sheet; and a Zn—Al—Mg-based plating layer provided on at least one surface of the base steel sheet, wherein the Zn—Al—Mg-based plating layer may include a surface modified region enriched with cerium (Ce) on a surface layer side of the Zn—Al—Mg-based plating layer.
Who is the assignee on this patent?
Posco Co Ltd
What technology area does this patent fall under?
Primary CPC classification C23C2/06. Mapped technology areas include Chemistry & Metallurgy.
When was this patent published?
Publication date Tue Jan 07 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).