CN104562172A - Electrolytic polishing method for aluminum alloy workpieces - Google Patents
Electrolytic polishing method for aluminum alloy workpieces Download PDFInfo
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- CN104562172A CN104562172A CN201310496754.6A CN201310496754A CN104562172A CN 104562172 A CN104562172 A CN 104562172A CN 201310496754 A CN201310496754 A CN 201310496754A CN 104562172 A CN104562172 A CN 104562172A
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- alloy parts
- electrolytic polishing
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- polishing
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Abstract
The invention discloses an electrolytic polishing method for aluminum alloy workpieces. A polishing solution is prepared in an electrolytic tank and is prepared from, by mass, 55% of strong phosphoric acid with a concentration of 85%, 10% of strong phosphoric acid with a concentration of 98%, 15% of a YB-66 additive and 20% of water. During electrolytic polishing, the polishing solution is heated to reach 60 DEG C, the current density is 17-20A/dm2, and the time of electrolytic polishing lasts for 3-5 minutes. The polishing electrolytic solution used in the method can achieve a better polishing effect by being matched with the specific current density and a cathode and anode area proportion; additionally, high-frequency vibration is used in the polishing process, and accordingly, grooves of the workpieces can be fully subjected to electrolysis. The electrolytic polishing method can be used for the aluminum alloy workpieces with complicated structures and can meet a requirement for high surface smoothness.
Description
Technical field
The present invention relates to a kind of finishing method of aluminium alloy, particularly a kind of electrolytic polishing method of Al alloy parts.
Background technology
Aluminium is the more rich elements of occurring in nature reserves.Fine aluminium have lightweight, ductility good, easy processing, the advantage such as corrosion-resistant, but physical strength is poor.Though and some aluminum alloy machinery intensity are high, have solidity to corrosion poor, wear resistance is low, the ornamental shortcoming such as not good.Therefore, in actual applications, surface treatment must be carried out to it, improve its condition of surface.The surface finish of Al and Alalloy both can as a kind of finalization process of surface working, also can as anodic oxidation, the preprocessing process before plating.Lot of domestic and international bibliographical information crosses the processing of surface polishing of Al and Alalloy, is summed up, nothing more than three kinds: mechanical polishing, chemical rightenning and electrochemical etching.
Summary of the invention
The object of the invention is to, a kind of electrolytic polishing method of Al alloy parts is provided.It may be used for the processing that the comparatively complicated and luminance brightness of shape requires high Al alloy parts.
Technical scheme of the present invention: a kind of electrolytic polishing method of Al alloy parts, be characterized in: prepare polishing fluid in a cell, by mass parts agent, described polishing fluid be with 55% concentration be the strong phosphoric acid of 85%, the concentration of 10% be 98% the vitriol oil, 15%YB-66 additive and 20% water be prepared from, during electropolishing, polishing fluid is heated to 60 DEG C, current density is 17 ~ 20A/dm
2, the time of electropolishing is 3 ~ 5 minutes.
In the electrolytic polishing method of above-mentioned Al alloy parts, in electrolyzer described in it, the ratio of cathode area and annode area is 2 ~ 3:1.
In the electrolytic polishing method of aforesaid Al alloy parts, vibrating device is set in described electrolyzer, in the process of electropolishing, makes whole electrolyzer carry out high-frequency vibration.
In the electrolytic polishing method of aforesaid Al alloy parts, described Al alloy parts will first through oil removal treatment before entering electrolyzer, the alkaline degreasing liquid comprising anhydrous sodium carbonate 40 ~ 60g/L, tertiary sodium phosphate 40 ~ 60g/L and water glass 20 ~ 30g/L is used to carry out dipping oil removing, dipping temperature is 50 ~ 70 DEG C, and dipping time is 15 ~ 30 minutes.
In the electrolytic polishing method of aforesaid Al alloy parts, after using the oil removing of degreasing fluid dipping, Al alloy parts is flooded decontamination in the solution of fluoride ion, wherein the solution of fluoride ion is that to comprise concentration be the nitric acid 500 ~ 700ml/L of 65% and the solution of ammonium bifluoride 50 ~ 120g/L, during dipping, temperature keeps 20 ~ 25 DEG C, dipping time 30 seconds.
Compared with prior art, the polishing electrolytic solution that the present invention uses coordinates specific current density and ratio of cathodic to anodic area example, can play better polishing effect.In addition, the present invention also employs high-frequency vibration in polishing process, and the groove position of workpiece thus can be made also fully to obtain electrolysis.May be used for baroque Al alloy parts with the inventive method, and can higher surface smoothness be met.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but not as the foundation limited the present invention.
Embodiment.A kind of electrolytic polishing method of Al alloy parts, prepare polishing fluid in a cell, by mass parts agent, described polishing fluid be with 55% concentration be the strong phosphoric acid of 85%, the concentration of 10% be 98% the vitriol oil, 15%YB-66 additive and 20% water be prepared from, during electropolishing, polishing fluid is heated to 60 DEG C, current density is 17 ~ 20A/dm
2, the time of electropolishing is 3 ~ 5 minutes.In described electrolyzer, the ratio of cathode area and annode area is 2 ~ 3:1.Vibrating device is set in described electrolyzer, in the process of electropolishing, makes whole electrolyzer carry out high-frequency vibration.Described Al alloy parts will first through oil removal treatment before entering electrolyzer, the alkaline degreasing liquid comprising anhydrous sodium carbonate 40 ~ 60g/L, tertiary sodium phosphate 40 ~ 60g/L and water glass 20 ~ 30g/L is used to carry out dipping oil removing, dipping temperature is 50 ~ 70 DEG C, and dipping time is 15 ~ 30 minutes.After using the oil removing of degreasing fluid dipping, Al alloy parts is flooded decontamination in the solution of fluoride ion, wherein the solution of fluoride ion is that to comprise concentration be the nitric acid 500 ~ 700ml/L of 65% and the solution of ammonium bifluoride 50 ~ 120g/L, and during dipping, temperature keeps 20 ~ 25 DEG C, dipping time 30 seconds.
Claims (5)
1. the electrolytic polishing method of an Al alloy parts, it is characterized in that: prepare polishing fluid in a cell, by mass parts agent, described polishing fluid be with 55% concentration be the strong phosphoric acid of 85%, the concentration of 10% be 98% the vitriol oil, 15%YB-66 additive and 20% water be prepared from, during electropolishing, polishing fluid is heated to 60 DEG C, current density is 17 ~ 20A/dm
2, the time of electropolishing is 3 ~ 5 minutes.
2. the electrolytic polishing method of Al alloy parts according to claim 1, is characterized in that: in described electrolyzer, the ratio of cathode area and annode area is 2 ~ 3:1.
3. the electrolytic polishing method of Al alloy parts according to claim 1, is characterized in that: in described electrolyzer, arrange vibrating device, makes whole electrolyzer carry out high-frequency vibration in the process of electropolishing.
4. the electrolytic polishing method of Al alloy parts according to claim 1, it is characterized in that: described Al alloy parts will first through oil removal treatment before entering electrolyzer, the alkaline degreasing liquid comprising anhydrous sodium carbonate 40 ~ 60g/L, tertiary sodium phosphate 40 ~ 60g/L and water glass 20 ~ 30g/L is used to carry out dipping oil removing, dipping temperature is 50 ~ 70 DEG C, and dipping time is 15 ~ 30 minutes.
5. the electrolytic polishing method of Al alloy parts according to claim 4, it is characterized in that: after using the oil removing of degreasing fluid dipping, Al alloy parts is flooded decontamination in the solution of fluoride ion, wherein the solution of fluoride ion is that to comprise concentration be the nitric acid 500 ~ 700ml/L of 65% and the solution of ammonium bifluoride 50 ~ 120g/L, during dipping, temperature keeps 20 ~ 25 DEG C, dipping time 30 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496754.6A CN104562172A (en) | 2013-10-21 | 2013-10-21 | Electrolytic polishing method for aluminum alloy workpieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496754.6A CN104562172A (en) | 2013-10-21 | 2013-10-21 | Electrolytic polishing method for aluminum alloy workpieces |
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| Publication Number | Publication Date |
|---|---|
| CN104562172A true CN104562172A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310496754.6A Pending CN104562172A (en) | 2013-10-21 | 2013-10-21 | Electrolytic polishing method for aluminum alloy workpieces |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337189A (en) * | 2016-10-27 | 2017-01-18 | 贵州安吉航空精密铸造有限责任公司 | Surface treatment method of investment precision casting |
| CN107858733A (en) * | 2017-11-07 | 2018-03-30 | 广东永利坚铝业有限公司 | A kind of Aluminum Coloring method |
-
2013
- 2013-10-21 CN CN201310496754.6A patent/CN104562172A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337189A (en) * | 2016-10-27 | 2017-01-18 | 贵州安吉航空精密铸造有限责任公司 | Surface treatment method of investment precision casting |
| CN107858733A (en) * | 2017-11-07 | 2018-03-30 | 广东永利坚铝业有限公司 | A kind of Aluminum Coloring method |
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Application publication date: 20150429 |
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| WD01 | Invention patent application deemed withdrawn after publication |