Metal-resin composite material, method for producing the same, and aluminum substrate having aluminum oxide coating
US-2016194779-A1 · Jul 7, 2016 · US
Surface-treated aluminum material and method for producing the same
US12571121B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12571121-B2 |
| Application number | US-202218146618-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 27, 2022 |
| Priority date | Jul 2, 2020 |
| Publication date | Mar 10, 2026 |
| Grant date | Mar 10, 2026 |
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Abstract
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The surface-treated aluminum material includes an aluminum material and an oxide film formed on at least part of a surface of the aluminum material, and when a perimeter and an area of a void on a surface of the oxide film are represented by L and S, respectively, an undulation degree of the void defined as L 2 /S×(¼π) is 2.5 or more.
First claim
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The invention claimed is: 1 . A surface-treated aluminum material comprising an aluminum material and an oxide film formed on at least part of a surface of the aluminum material, wherein, when a perimeter and an area of a void on a surface of the oxide film are represented by L and S, respectively, an undulation degree of the void defined as L 2 /S×(¼×) is 2.5 or more, wherein a diameter of the void is 25 to 65 nm in terms of a circle equivalent diameter, the oxide film comprises a barrier anodic oxide film layer formed on at least part of the surface of the aluminum material and an aluminum oxide film layer formed on the barrier anodic oxide film layer, the void is located on a surface of the aluminum oxide film layer, and the void is a small pore extending from the surface of the aluminum oxide film layer to the inside. 2 . The surface-treated aluminum material according to claim 1 , wherein an area occupying ratio of the void on the surface of the oxide film is 10 to 60%. 3 . The surface-treated aluminum material according to claim 1 , further comprising a resin layer on the surface of the oxide film. 4 . A method for producing the surface-treated aluminum material according to claim 1 , wherein an acid or alkaline aqueous solution having a liquid temperature of 30 to 90° C. is used as an electrolytic solution, and wherein the oxide film is formed by performing electrolytic treatment with respect to the aluminum material so that a current density is 10 A/m 2 or more and 3,000 A/m 2 or less.
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Classifications
for sealing layers · CPC title
Chemical after-treatment · CPC title
After-treatment, e.g. pore-sealing · CPC title
characterised by the electrolytes used · CPC title
Anodisation under pulsed or modulated current or potential · CPC title
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- What does patent US12571121B2 cover?
- The surface-treated aluminum material includes an aluminum material and an oxide film formed on at least part of a surface of the aluminum material, and when a perimeter and an area of a void on a surface of the oxide film are represented by L and S, respectively, an undulation degree of the void defined as L 2 /S×(¼π) is 2.5 or more.
- Who is the assignee on this patent?
- Uacj Corp
- What technology area does this patent fall under?
- Primary CPC classification C25D11/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 10 2026 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).