CN102051621A - Chemical polishing solution for titanium and titanium alloy - Google Patents
Chemical polishing solution for titanium and titanium alloy Download PDFInfo
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- CN102051621A CN102051621A CN2009102370708A CN200910237070A CN102051621A CN 102051621 A CN102051621 A CN 102051621A CN 2009102370708 A CN2009102370708 A CN 2009102370708A CN 200910237070 A CN200910237070 A CN 200910237070A CN 102051621 A CN102051621 A CN 102051621A
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Abstract
The invention relates to chemical polishing solution for titanium and titanium alloy, and belongs to a chemical formula. The chemical polishing solution consists of ammonium fluoride, lactic acid, nitric acid and water, wherein the content of the ammonium fluoride is 60 to 300g/L, the volume ratio of the lactic acid (the content is 85 to 90 percent) is 65 to 91 percent, and the volume ratio of the nitric acid (the content is 65 to 68 percent) is 9 to 35 percent. The solution has the characteristics that the reaction velocity is easy to control, the etching rate difference between different phases or between grains can be reduced, the titanium metal matrix is effectively protected, and the like. The chemical polishing solution for the titanium and the titanium alloy is simple and convenience and has the advantages of high efficiency, low cost, good surface quality and the like.
Description
Technical field
The present invention relates to a kind of chemical polishing soln that is used for titanium or titanium alloy, belong to a kind of chemical formulation.
Background technology
The titanium or titanium alloy metal has light weight, high strength, excellent erosion resistance, and can not produce characteristic such as allergy for human body skin, therefore is applied in various fields widely.Titanium or titanium alloy has characteristics such as high relative intensity (tension stress/density), high-tensile, antifatigue, impact resistance and high heat impedance on mechanical characteristics, therefore be widely used on space industry, sports equipment, attachments of a bicycle, golf club, glasses and other the multinomial civilian goods.Secondly, titanium and alloy thereof can not make human body skin produce irritated reflection, therefore can replace to cause skin to itch or the nickel or the Nikel alloy products of dermatitis in the past.In addition, titanium or titanium alloy can be applicable to medical device, as tweezers, and can be used as the material of organism implant, as skeletal fixation plate, screw and vertebra support cages etc.But because the cutting ability of titanium or titanium alloy is poor, easily oxidation of surface is often adopted methods such as mechanical polishing method, electropolishing method and chemical polishing to carry out surface finishing and is handled.There is the dead angle that can't polish in the mechanical polishing method labor intensive for on-plane surface; Electropolishing method complex process, influence factor be many, be difficult to grasp; And advantage such as that chemical polishing has is easy, polishing efficiency is high, processing is meticulous, surface quality is good is subjected to widespread use always.
The polishing fluid of the chemical polishing of known titanium or titanium alloy mainly adopts hydrofluoric acid and other chemical substance directly to dispose, and utilize hydrofluoric acid, sulfuric acid, 40% acetic acid and the nitric acid that are disclosed as russian patent SU1715887 polish with the ratio institute blended aqueous solution of 25-28%: 40-45%: 2-5%: 25-30%.In addition, pine tail intelligence fortunately waits the people to disclose a kind of two-section type chemical polishing at Japanese Patent JP4088178, be earlier Ti product to be heated to 50 ℃ of polishings of carrying out first section in the mixing solutions (blending ratio is 1: 1: 2) of hydrofluoric acid, acetic acid and phosphoric acid, then finish second section polishing with 7: 1 blending ratio mixing hydrogen peroxide and hydrofluoric acid again.Because hydrofluoric acid is more intense to the corrosive nature of titanium, it is violent directly to dispose solution reaction, and solubleness is wayward, often causes the infringement of titanium metal matrix corrosion, surface easily to inhale consequences such as hydrogen.Particularly for heterogeneous titanium alloy, since the alloy material microcosmic surface not between the homophase or crystal grain and intergranular etch rate variant, present chemical brightening solution surfacing effect is not good enough, not between the homophase or crystal grain and intergranular etching difference arrive sometimes more than the 5 μ m.
Summary of the invention
The object of the present invention is to provide a kind of chemical polishing soln of titanium or titanium alloy, this solution has speed of response and is easy to control, reduces not between the homophase or crystal grain and intergranular etch rate difference, effectively protects characteristics such as titanium metal matrix.
For achieving the above object, the present invention takes following technical scheme:
A kind of chemical polishing soln of titanium or titanium alloy, it consists of Neutral ammonium fluoride, lactic acid, nitric acid, and wherein the content of Neutral ammonium fluoride is that the volume ratio of 60-300g/L, lactic acid is that the volume ratio of 65-91%, nitric acid is 9-35%.
A kind of optimized technical scheme is characterized in that: the content of described lactic acid is 85-90%, and the content of described nitric acid is 65-68%.
A kind of using method of chemical polishing soln of titanium or titanium alloy comprises the steps: the titanium or titanium alloy surface is carried out oil removing, washing earlier, at room temperature puts into chemical polishing soln then, takes out behind the certain hour and washes, dries, and obtains polishing sample.
A kind of optimized technical scheme is characterized in that: described room temperature is 15-35 ℃.
The invention has the advantages that:
1, titanium or titanium alloy chemical polishing soln provided by the invention has speed of response and is easy to control, reduces not between the homophase or crystal grain and intergranular etch rate difference, and surface quality is good, effectively protect characteristics such as titanium metal matrix.
2, titanium or titanium alloy chemical polishing soln provided by the invention has easy, efficient, low cost and other advantages.
The present invention will be further described below by embodiment, but and do not mean that limiting the scope of the invention.
Embodiment
Embodiment 1
Put chemical polishing soln by following set of dispense:
The content of Neutral ammonium fluoride: 60g/L;
The volume ratio of lactic acid (content is 85-90%): 91%;
The volume ratio of nitric acid (content is 65-68%): 9%.
To be of a size of the pure titanium plate of 20mm * 20mm * 3mm is laboratory sample, and surfaceness is 2.1-1.8 μ m, earlier with the pure titanium metal sample process oil removing (solution: 40g/L NaOH, 45g/L Na for preparing
3PO
4, 30g/L Na
2CO
375 ℃ of temperature, time 10min), after clear water rinsing etc. handles, then sample be impregnated in the above-mentioned chemical polishing soln, under the room temperature (15 ℃), take out sample washing earlier oven dry again after 6 minutes and 12 minutes respectively, then obtain polishing sample, two kinds of sample surfaces of this gained are all smooth, are silver gray, the appearance of intergranular or grain shape does not appear in light.
The sample average depth of corrosion of taking out after 6 minutes is 15.2 μ m, and the sample average depth of corrosion of taking out in 12 minutes is 17.3 μ m, as seen; the sample erosion rate is slow after 6 minutes; matrix corrosion is lighter, and the ie in solution speed of response is easy to control, and can effectively protect the titanium metal matrix.
Embodiment 2
Put chemical polishing soln by following set of dispense:
The content of Neutral ammonium fluoride: 160g/L;
The volume ratio of lactic acid (content is 85-90%): 80%;
The volume ratio of nitric acid (content is 65-68%): 20%.
Titanium alloy rod with the Ti-6Al-4V that is of a size of φ 15mm * 30mm is a laboratory sample, and surfaceness is 2.5-2.0 μ m, earlier with the titanium alloy metal sample of preparation through oil removing (solution: 40g/L NaOH, 45g/L Na
3PO
4, 30g/L Na
2CO
375 ℃ of temperature, time 10min), after clear water rinsing etc. handles, sample be impregnated in the above-mentioned chemical polishing soln then, under the room temperature (25 ℃), take out sample washing earlier oven dry again after 3 minutes and 8 minutes respectively, then obtain polishing sample, two kinds of equal smooth surfaces of sample of this gained are smooth, show mirror-like, be silvery white in color, have good gloss, the appearance of intergranular or grain shape do not occur.
The sample average depth of corrosion of taking out in 3 minutes is 21.4 μ m, and the sample average depth of corrosion of taking out in 8 minutes is 26.2 μ m, as seen; the sample erosion rate is slow after 3 minutes; matrix corrosion is lighter, and the ie in solution speed of response is easy to control, and has effectively protected the titanium metal matrix.
Embodiment 3
Put chemical polishing soln by following set of dispense:
The content of Neutral ammonium fluoride: 300g/L;
The volume ratio of lactic acid (content is 85-90%): 65%;
The volume ratio of nitric acid (content is 65-68%): 35%.
Titanium alloy with the Ti-6Al-4V of 20mm * 20mm * 3mm is a laboratory sample, and surfaceness is 2.8-2.1 μ m, earlier with the titanium alloy metal sample of preparation through oil removing (solution: 40g/L NaOH, 45g/L Na
3PO
4, 30g/L Na
2CO
375 ℃ of temperature, time 10min), after clear water rinsing etc. handles, then sample be impregnated in the above-mentioned chemical polishing soln, under the room temperature (35 ℃), take out sample washing earlier oven dry again after 2 minutes and 12 minutes respectively, then obtain polishing sample, two kinds of equal surfacings of sample of this gained are silvery white in color, brightness is higher, the appearance of intergranular or grain shape do not occur.
The sample average depth of corrosion of taking out in 2 minutes is 26.8 μ m, and the sample average depth of corrosion of taking out in 12 minutes is 32.3 μ m, as seen; the sample erosion rate is slow after 2 minutes; solution is lighter to matrix corrosion, and the ie in solution speed of response is easy to control, and can effectively protect the titanium metal matrix.
Above embodiment is the detailed description that the present invention is done.Notice that these embodiments are not in order to limit the present invention,,, should be considered as within protection scope of the present invention not deviating from the improvement of being made under the situation of the present invention and replenishing for those skilled in the art.
Claims (4)
1. the chemical polishing soln of a titanium or titanium alloy, it consists of Neutral ammonium fluoride, lactic acid, nitric acid, and wherein the content of Neutral ammonium fluoride is that the volume ratio of 60-300g/L, lactic acid is that the volume ratio of 65-91%, nitric acid is 9-35%.
2. the chemical polishing soln of titanium or titanium alloy according to claim 1, it is characterized in that: the content of described lactic acid is 85-90%, the content of described nitric acid is 65-68%.
3. the using method of the chemical polishing soln of claim 1 or 2 described titanium or titanium alloy, comprise the steps: the titanium or titanium alloy surface is carried out oil removing, washing earlier, at room temperature put into above-mentioned chemical polishing soln then, take out behind the certain hour, wash again, dry, obtain polishing sample.
4. the using method of the chemical polishing soln of titanium or titanium alloy according to claim 2, it is characterized in that: described room temperature is 15-35 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102370708A CN102051621A (en) | 2009-11-03 | 2009-11-03 | Chemical polishing solution for titanium and titanium alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102370708A CN102051621A (en) | 2009-11-03 | 2009-11-03 | Chemical polishing solution for titanium and titanium alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562058A (en) * | 2014-12-23 | 2015-04-29 | 北京有色金属研究总院 | Solution for deashing and processing surface of silicon aluminum composite material |
| CN105297026A (en) * | 2015-12-04 | 2016-02-03 | 南华大学 | Chemical polishing solution for titanium alloy |
| CN106917128A (en) * | 2017-03-10 | 2017-07-04 | 北京工业大学 | A kind of tin molybdenum codope titanium dioxide nanotube array electrode and preparation method |
| CN108611643A (en) * | 2018-04-24 | 2018-10-02 | 东北大学 | A kind of chemical polishing solution and polishing method of the special-shaped titanium alloy of laser gain material manufacture |
-
2009
- 2009-11-03 CN CN2009102370708A patent/CN102051621A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562058A (en) * | 2014-12-23 | 2015-04-29 | 北京有色金属研究总院 | Solution for deashing and processing surface of silicon aluminum composite material |
| CN105297026A (en) * | 2015-12-04 | 2016-02-03 | 南华大学 | Chemical polishing solution for titanium alloy |
| CN106917128A (en) * | 2017-03-10 | 2017-07-04 | 北京工业大学 | A kind of tin molybdenum codope titanium dioxide nanotube array electrode and preparation method |
| CN106917128B (en) * | 2017-03-10 | 2019-10-15 | 北京工业大学 | A kind of tin-molybdenum codope titanium dioxide nanotube array electrode and preparation method |
| CN108611643A (en) * | 2018-04-24 | 2018-10-02 | 东北大学 | A kind of chemical polishing solution and polishing method of the special-shaped titanium alloy of laser gain material manufacture |
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Application publication date: 20110511 |