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Electrolytic solution and method for surface treatment of aluminum alloys for casting
US9845547B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9845547-B2 |
| Application number | US-201514621008-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 12, 2015 |
| Priority date | Oct 24, 2014 |
| Publication date | Dec 19, 2017 |
| Grant date | Dec 19, 2017 |
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Abstract
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A method for surface treatment of aluminum alloys for forms an oxidation film in the aluminum alloys for casting by adding a metallic anion compound to an electrolytic solution. The method can prevent cracks from occurring on a surface of the aluminum alloys for casting at the time of applying an anodizing method.
First claim
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What is claimed is: 1. A method for surface treatment of aluminum alloys for casting, comprising: forming an oxidation film in the aluminum alloys for casting by adding a metallic anion compound to an electrolytic solution, wherein the electrolytic solution is prepared using any one material selected from sulfuric acid and oxalic acid as a base, and wherein the metallic anion compound is NaAlO 2 . 2. The method of claim 1 , wherein the aluminum alloys for casting includes Si ranging from 4.0 to 24.0 wt %, and the oxidation film has a thickness which is set to be equal to or more than 5 μm. 3. The method of claim 2 , comprising steps of: coupling anions of the metallic anion compound included in the electrolytic solution with cracks formed on a surface of the aluminum alloys for casting by controlling a range of voltage, current, time, and temperature. 4. The method of claim 3 , wherein the voltage is controlled to be within a range of 10 to 200 V, the current is controlled to be within a range of 0.2 to 10 A/cm 2 , and the time is controlled to be within a range of 1 to 24 h, and the metallic anion compound is added within a range of 0.02 to 0.4 M.
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- What does patent US9845547B2 cover?
- A method for surface treatment of aluminum alloys for forms an oxidation film in the aluminum alloys for casting by adding a metallic anion compound to an electrolytic solution. The method can prevent cracks from occurring on a surface of the aluminum alloys for casting at the time of applying an anodizing method.
- Who is the assignee on this patent?
- Hyundai Motor Co Ltd, Inha-Industry Partnership Inst
- What technology area does this patent fall under?
- Primary CPC classification C25D11/10. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 19 2017 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).