Electrochemical plating methods
US-2015357195-A1 · Dec 10, 2015 · US
Steel sheet for can making and method for manufacturing the same
US2021324532A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021324532-A1 |
| Application number | US-201917271967-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 7, 2019 |
| Priority date | Aug 29, 2018 |
| Publication date | Oct 21, 2021 |
| Grant date | — |
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Abstract
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A steel sheet for can making and methods for manufacturing the same. The steel sheet includes, in order from a steel sheet side, an iron-nickel diffusion layer, a metallic chromium layer, and a chromium oxide layer. The iron-nickel diffusion layer has a nickel coating weight of 50 mg/m2 to 500 mg/m2 per surface of the steel sheet and a thickness of 0.060 μm to 0.500 μm per surface of the steel sheet. The metallic chromium layer includes a flat-like metallic chromium sublayer and a granular metallic chromium sublayer placed on a surface of the flat-like metallic chromium sublayer. The total chromium coating weight of both sublayers per surface of the steel sheet is 60 mg/m2 to 200 mg/m2. The chromium oxide layer has a chromium coating weight 3 mg/m2 to 10 mg/m2 per surface of the steel sheet in terms of metallic chromium.
First claim
Opening claim text (preview).
1 . A steel sheet for can making, comprising an iron-nickel diffusion layer, a metallic chromium layer, and a chromium oxide layer on at least one surface of the steel sheet in order from the steel sheet side, wherein the iron-nickel diffusion layer has a nickel coating weight of 50 mg/m 2 to 500 mg/m 2 per: surface of the steel sheet and a thickness of 0.060 μm to 0.500 μm per surface of the steel sheet, the metallic chromium layer includes a flat-like metallic chromium sublayer and a granular metallic chromium sublayer placed on a surface of the flat-like metallic chromium sublayer, the total chromium coating weight of both per surface of the steel sheet is 60 mg/m 2 to 200 mg/m 2 , the granular metallic chromium sublayer further includes granular protrusions having a number density of 5 μm −2 or more per unit area and a maximum diameter of 150 nm or less, and the chromium oxide layer has a chromium coating weight 3 mg/m 2 to 10 mg/m 2 per surface of the steel sheet in terms of metallic chromium. 2 . A method for manufacturing a steel sheet for can making, comprising nickel-plating a cold-rolled steel sheet; annealing the cold-rolled steel sheet; subjecting the steel sheet to an anterior cathodic electrolytic treatment using an aqueous solution containing a hexavalent chromium compound, a fluorine-containing compound, and sulfuric acid or a sulfate; subsequently subjecting the steel sheet to an anodic electrolytic treatment; and further subsequently subjecting the steel sheet to a posterior cathodic electrolytic treatment. 3 . A method for manufacturing a steel sheet for can making, comprising nickel-plating a cold-rolled steel sheet, annealing the cold-rolled steel sheet, subjecting the steel sheet to an anterior cathodic electrolytic treatment using an aqueous solution which contains a hexavalent chromium compound and a fluorine-containing compound and which contains no sulfuric acid or sulfate except sulfuric acid or a sulfate that is inevitably contained, subsequently subjecting the steel sheet to an anodic electrolytic treatment, and further subsequently subjecting the steel sheet to a posterior cathodic electrolytic treatment.
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Classifications
of nickel or cobalt · CPC title
Strips or foils · CPC title
on iron or steel · CPC title
Crystalline layers · CPC title
by heat-treatment · CPC title
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- What does patent US2021324532A1 cover?
- A steel sheet for can making and methods for manufacturing the same. The steel sheet includes, in order from a steel sheet side, an iron-nickel diffusion layer, a metallic chromium layer, and a chromium oxide layer. The iron-nickel diffusion layer has a nickel coating weight of 50 mg/m2 to 500 mg/m2 per surface of the steel sheet and a thickness of 0.060 μm to 0.500 μm per surface of the steel …
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C25D5/14. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Oct 21 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).