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Electrogalvanized steel sheet having superb whiteness and method for manufacturing same
US12497708B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12497708-B2 |
| Application number | US-202017786990-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 3, 2020 |
| Priority date | Dec 20, 2019 |
| Publication date | Dec 16, 2025 |
| Grant date | Dec 16, 2025 |
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Abstract
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The present invention provides an electrogalvanized steel sheet and a method manufacturing same, the electrogalvanized steel sheet having superb whiteness, and an attractive exterior surface due to reduction in surface scale.
First claim
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The invention claimed is: 1 . An electrogalvanized steel sheet having excellent whiteness, comprising: a base steel sheet having a grain size of 10 to 20 μm in an internal structure; a nickel coating layer having an adhesion amount of 50 to 300 mg/m 2 provided on the base steel sheet; and a galvanized layer provided on the nickel coating layer, wherein the galvanized layer is formed from a galvanizing bath that includes Fe ions in a concentration of less than 500 ppm, and Na, Ca, and Mg ions at a combined concentration of 50 to 150 ppm, and wherein a whiteness L value is 88.0 or more measured by a Minolta CR-400 colorimeter, and the whiteness is measured based in the galvanized layer. 2 . The electrogalvanized steel sheet having excellent whiteness of claim 1 , wherein the electrogalvanized steel sheet comprises a single or a plurality of resin layers provided on the galvanized layer. 3 . The electrogalvanized steel sheet having excellent whiteness of claim 1 , wherein the whiteness L value is less than 89.5 measured by the Minolta CR-400 colorimeter.
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Frequently asked questions
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- What does patent US12497708B2 cover?
- The present invention provides an electrogalvanized steel sheet and a method manufacturing same, the electrogalvanized steel sheet having superb whiteness, and an attractive exterior surface due to reduction in surface scale.
- Who is the assignee on this patent?
- Posco, Posco Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C25D5/627. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 16 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).