Electrochemical polishing of non-uniform features
US-10493549-B2 · Dec 3, 2019 · US
Electropolishing treatment method for stainless steel workpiece
US11486052B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11486052-B2 |
| Application number | US-202117562032-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 27, 2021 |
| Priority date | Dec 28, 2020 |
| Publication date | Nov 1, 2022 |
| Grant date | Nov 1, 2022 |
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Abstract
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Provides an electropolishing treatment method for a stainless steel workpiece, wherein the method comprises the following steps: placing the stainless steel workpiece in an oxalic acid solution and performing supersonic oscillation; performing a first electropolishing treatment to the stainless steel workpiece, wherein the first electropolishing treatment uses the stainless steel workpiece as an anode and 10% to 15% perchloric acid as an electrolyte, and when a constant voltage is set as 12V, the first electropolishing treatment procedure is performed; and performing a second electropolishing treatment to the stainless steel workpiece, wherein the second electropolishing treatment uses the stainless steel workpiece after the first electropolishing treatment as an anode, and an electrolyte consists of ethanol, sulfuric acid and perchloric acid, and when a constant voltage is set as 12V, the second electropolishing treatment is performed to obtain the stainless steel workpiece after the second electropolishing treatment.
First claim
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What is claimed is: 1. An electropolishing treatment method for a stainless steel workpiece, comprising following steps: placing the stainless steel workpiece in an oxalic acid solution and performing supersonic oscillation; performing a first electropolishing treatment to the stainless steel workpiece, wherein the first electropolishing treatment uses the stainless steel workpiece as an anode and 10% to 15% perchloric acid as an electrolyte, and when a constant voltage is set as 12V to 15V, the first electropolishing treatment procedure is performed; and performing a second electropolishing treatment to the stainless steel workpiece, wherein the second electropolishing treatment uses the stainless steel workpiece after the first electropolishing treatment as an anode, and an electrolyte consists of ethanol, sulfuric acid and perchloric acid, and when a constant voltage is set as 12V to 15V, the second electropolishing treatment is performed to obtain the stainless steel workpiece after the second electropolishing treatment. 2. The electropolishing treatment method for a stainless steel workpiece according to claim 1 , wherein the electrolyte of the second electropolishing treatment consists of 90% to 93% ethanol, 4% to 7% sulfuric acid and 2% to 3% perchloric acid. 3. The electropolishing treatment method for a stainless steel workpiece according to claim 1 , wherein the time of the first electropolishing treatment is between 5 and 10 minutes. 4. The electropolishing treatment method for a stainless steel workpiece according to claim 1 , wherein the time of the second electropolishing treatment is between 15 and 20 minutes. 5. The electropolishing treatment method for a stainless steel workpiece according to claim 1 , wherein the stainless steel workpiece is a workpiece produced by an additive manufacturing equipment. 6. The electropolishing treatment method for a stainless steel workpiece according to claim 1 , wherein the stainless steel workpiece is a 17-4PH® stainless steel workpiece. 7. The electropolishing treatment method for a stainless steel workpiece according to claim 1 , wherein the stainless steel workpiece is a stainless steel workpiece of heat treatment state or additive manufacturing state. 8. The electropolishing treatment method for a stainless steel workpiece according to claim 1 , wherein the time of the supersonic oscillation is between 60 and 70 minutes.
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- What does patent US11486052B2 cover?
- Provides an electropolishing treatment method for a stainless steel workpiece, wherein the method comprises the following steps: placing the stainless steel workpiece in an oxalic acid solution and performing supersonic oscillation; performing a first electropolishing treatment to the stainless steel workpiece, wherein the first electropolishing treatment uses the stainless steel workpiece as a…
- Who is the assignee on this patent?
- Nat Chung Shan Inst Science & Tech
- What technology area does this patent fall under?
- Primary CPC classification C25F3/24. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 01 2022 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).