CN1611640A - End voltage method titanium alloy anode oxidizing process - Google Patents
End voltage method titanium alloy anode oxidizing process Download PDFInfo
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- CN1611640A CN1611640A CN 200310103374 CN200310103374A CN1611640A CN 1611640 A CN1611640 A CN 1611640A CN 200310103374 CN200310103374 CN 200310103374 CN 200310103374 A CN200310103374 A CN 200310103374A CN 1611640 A CN1611640 A CN 1611640A
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Abstract
This invention is about a kind of craftwork in anodicoxidation surface treatment of titanium alloy, it is particularly suitable to forming sulphuric acid anodizing film of the thin layer of the titanium alloy. This anodicoxidation craftwork of the titanium alloy by terminal voltage has such characteristics, when the anodizing process being performed, the applied voltage need not to upgrade, rather, the anode voltage-terminal voltage should be set at one time in operating the craftwork, thus the oxide film is formed by a constant pressure under the anode voltage of the terminal voltage. This craftwork has an obvious effect upon anodizing the blue thin layer of the TC1 titanium alloy. It can meet the requirements in performance and quality and doesn't need any special power supply and can produce the titanium alloy parts in the common anodizing manufacturing line of A-alloy.
Description
Technical field
The present invention relates to a kind of titanium alloy anode oxidation surface treatment process method, be particularly suitable for being applied to the formation of titanium alloy thin layer sulfuric acid type anode oxide film, belong to metal finishing anodizing technology field.
Background technology
Titanium is that chemical property extremely active a kind of metal and oxygen have high avidity.But it can generate one deck (about 0.005～0.015 μ m of thickness) oxide film as thin as a wafer naturally in atmospheric environment, this protective membrane is generally highly stable, is passive state in a lot of corrosive mediums.Even this oxide film is damaged in addition, also can regenerate immediately (very strong self-reparing capability is arranged), it plays good provide protection to the titanium metal matrix.Titanium alloy equally also has superior corrosion resistance energy like this in atmosphere.
Yet when titanium or titanium alloy component are connected with the part contact of other metallic substance; because too high potential difference, as easy as rolling off a log generation galvanic corrosion causes it to connect the corrosion of idol; even one deck oxide film that has nature to form also can't stop this galvanic corrosion.Therefore, in order to improve the contact corrosion resistant performance of titanium alloy component, improve matrix and coating's adhesion, proposed titanium alloy component is carried out anodic oxidation treatment, make its generate one deck than the thickness of oxidation film that forms naturally the oxide film of Duoing, to prevent galvanic corrosion effectively.General titanium alloy anodic oxide film gauge control is more than 2 μ m, and thicker person reaches 8～10 μ m.
Titanium alloy anode oxidation is divided into alkaline anodic oxidation and acid anodic oxidation two big classes, and acid anodic oxidation is divided into two kinds of sulfuric acid type anodic oxidation and sulfuric acid phosphoric acid anodizings.The present invention relates generally to the titanium alloy sulfuric acid type anode oxidation process of oxide thin layer film (thickness≤4 μ m).
Titanium alloy sulfuric acid type anode oxidation process and other metallic substance (as aluminium alloy) anode oxidation process are different, establish one's own system, and himself characteristic is arranged.The titanium alloy sulfuric acid type anode oxidation process of prior art, its processing condition generally are: anode oxidation groove liquid composition sulfuric acid 180～220g/L, 15～25 ℃ of tank liquor temperatures, anode voltage 18～21V, 2～15 minutes time, wherein special requirement are when the workpiece anodic oxidation, the voltage that applies should reach setting voltage (final voltage) at the appointed time, progressively generate and progressively thickening with favourable oxide film, the regulation that has time that reaches final voltage of boosting is no more than 2 minutes, be in 0.5～1 minute the shortest pressure rising time, and oxidization time is 2～15 minutes.
When satisfying titanium alloy anode oxidation, the processing requirement that voltage will progressively raise, to do necessary control to rate of pressure rise when also promptly beginning to apply voltage, therefore the titanium alloy anode oxidation of prior art has particular requirement to power unit, and promptly power unit needs " being provided with the device that boosts automatically in stated limit "; Another kind of power supply is the special pulse power, and the recurrence interval is 1 second, and pulse duration and off time are by the variable-voltage transformer adjustment.
The deficiencies in the prior art are: this arts demand is equipped with has the power source special that progressively boosts in the certain hour, sets up special-purpose production line, makes the titanium alloy anode oxidation production cost increase the processing condition complexity; Such processing condition still can not guarantee the specification of quality of portioned product fully simultaneously, the oxide thin layer film thickness is extremely inhomogeneous, be easy to make rete to produce loose, efflorescence, there is floating ash on the surface, bonding force between reduction and doped envelope, inaccessible quality standard is more outstanding for this problem of titanium alloy of the part trade mark.
Summary of the invention
The purpose of this invention is to provide a kind of whole voltage method titanium alloy anode oxidation technique, to form the satisfied titanium alloy oxide film of quality, overcome the defective that anodic film exists on the deficiencies in the prior art and the product, these processing condition are simple, production cost is low, has certain versatility.
The technical scheme that realizes the object of the invention is, adopt whole voltage method titanium alloy anode oxidation technique, it relates to a kind of titanium alloy thin layer sulfuric acid type anode oxidation process method, its processing condition are: the anode oxidation groove liquid composition is sulfuric acid 180～220g/L, tank liquor temperature is 13～25 ℃, anode voltage 18～24V, 2～15 minutes time, the invention is characterized in: during anodic oxidation, the anode voltage that is applied on the workpiece is the final magnitude of voltage of disposable setting in the processing condition to workpiece in tank liquor.
From the anodic oxidation principle of work, " thickness of anode oxide film depends on final voltage and anodised time ".Here anodizing time is meant the time that final voltage continues in the anode oxidation process.If after setting final voltage, anodizing time is infinitely prolonged, in fact the thickness of oxide film can not infinitely increase after reaching certain value.That is to say that after anodizing time kept sufficiently long, the anodic oxidation film thickness depended primarily on final voltage.
By conventional principle, during anodic metal oxide, its oxide film be formed with a process, begin to apply low voltage, allow it form low voltage oxide thin layer film, strengthen anode voltage subsequently gradually, puncture established rete or see through netted oxide film gap and continue to deepen oxidation, so that oxide thickness increases, thickening, reach the expection requirement.Therefore anodic metal oxide usually adopts the processing method of progressively boosting.The titanium alloy anode oxidation of prior art just belongs to the processing method under this theoretical direction.
Anodised practice meets this theory fully for the part metals material, and can access the satisfied anode oxidation membrane of quality.But in the anodic oxidation practice of titanium alloy, traditional processing method just can not satisfy the titanium alloy anode oxidation quality index requirement of different thicknesses of layers, different-alloy composition fully, when the material of the part trade mark or requirement reached thicker oxide film, the deficiency of pointing out in the background technology appearred easily.
Adopt whole voltage method titanium alloy anode oxidation technique, beginning to apply voltage need not progressively boost, keeping under the enough long prerequisite, for reaching certain oxidation film layer thickness, in technological operation, once set anode voltage, being the anode voltage that final anodic oxidation rises to---whole voltage forms oxide film constant voltage under the anode voltage of voltage at this at end.Facts have proved that this method is effective, it is very remarkable especially to be for the trade mark that the titanium alloy of TC1 is implemented blue thin layer anodic oxidation effect.
Because the method that need not progressively boost, thereby the power unit of titanium alloy anode oxidation adopt general thyristor voltage stabilized source just can satisfy the performance requriements of processing condition requirement and antianode oxidation film layer.
Whole voltage method titanium alloy anode oxidation technique of the present invention is suitable for the blue thin layer anodic oxidation of titanium alloy that the trade mark is TC1, TC3, TC4, and TC1 is had special effect.
The present invention has positive effect, whole voltage method titanium alloy anode oxidation technique can satisfy titanium alloy anode oxidation capability and performance index request fully, reach the technical requirements of blue thin layer (～2 μ m) oxide film of titanium alloy, eliminate defectives such as the oxide film generation is loose, efflorescence, the floating ash in surface, the dried adhesive tape combining power test and the wet adhesive tape combining power test of quality examination (oxidation film layer coating one deck priming paint) are met the requirements.Solved the specification of quality that the TC1 titanium alloy is difficult to reach even blue oxide thin layer film especially; Power unit involved in the present invention does not need to use the automatic increasing apparatus that is arranged in the stated limit, adopt general surface treatment thyristor voltage stabilized source just can satisfy the processing condition requirement, reduced the production line one-time investment, reduced production cost, make titanium alloy anode oxidation technique simple, convenient simultaneously, can adopt the aluminium alloy production line to produce titanium alloy blue anodic oxidation part.
Embodiment
Embodiment 1: at 8 meters aluminium alloy anode oxide production lines, the power unit that is equipped with is general silicon controlled rectifier current regulator power supply, the anode oxidation process condition is: tank liquor composition sulfuric acid 188g/L, 18 ℃ of temperature, set 24 volts of whole voltages, 6 minutes anodic oxidation time length, other operation is identical with the titanium alloy anode oxidation technique of prior art with condition; Part material TC1-M-δ 1, size 135 * 210; Oxidation results is: the surface color blueness, and thicknesses of layers 2.2 μ m, the rete outward appearance is firmly fine and close, and detected result is done, wet tape test is qualified.
Embodiment 2: at 8 meters aluminium alloy anode oxide production lines, power unit is general silicon controlled rectifier current regulator power supply, the anode oxidation process condition is: tank liquor composition sulfuric acid 188g/L, 19 ℃ of temperature, set 18 volts of whole voltages, 15 minutes anodic oxidation time length, other operation is identical with the titanium alloy anode oxidation technique of prior art with condition; Part material TC1-M-δ 1, size 135 * 210; Oxidation results is: the surface color blueness, and thicknesses of layers 3.3 μ m, the rete outward appearance is firmly fine and close, and detected result is done, wet tape test is qualified.
Embodiment 3: at 6 meters titanium alloy anode oxidation production lines, the power unit that is equipped with is general silicon controlled rectifier current regulator power supply, the anode oxidation process condition is: tank liquor composition sulfuric acid 208g/L, 16 ℃ of temperature, set 22 volts of whole voltages, 4 minutes anodic oxidation time length, other operation is identical with the titanium alloy anode oxidation technique of prior art with condition; Part material TC3-M-δ 1, size 158 * 100; Oxidation results is: the surface color blueness, and thicknesses of layers 3.3 μ m, the rete outward appearance is firmly fine and close, and detected result is done, wet tape test is qualified.
Embodiment 4: at 6 meters titanium alloy anode oxidation production lines, the power unit that is equipped with is general silicon controlled rectifier current regulator power supply, the anode oxidation process condition is: tank liquor composition sulfuric acid 198g/L, 20 ℃ of temperature, set 22 volts of whole voltages, 3 minutes anodic oxidation time length, other operation is identical with the titanium alloy anode oxidation technique of prior art with condition; Part material TC1-M-δ 1, size 1115 * 950; Oxidation results is: surface color blueness (local is purple), and thicknesses of layers 2.1 μ m, the rete outward appearance is firmly fine and close, and detected result is done, wet tape test is qualified.
Embodiment 5: at 2 meters aluminium alloy anode oxide production lines, power unit is general silicon controlled rectifier current regulator power supply, the anode oxidation process condition is: tank liquor composition sulfuric acid 189g/L, 19 ℃ of temperature, set 23 volts of whole voltages, 10 minutes anodic oxidation time length, other operation is identical with the titanium alloy anode oxidation technique of prior art with condition; Part material TC4 (flat-die forging), size 150 * 100; Oxidation results is: the surface color blueness, and thicknesses of layers 2.0 μ m, the rete outward appearance is firmly fine and close, and detected result is done, wet tape test is qualified.
Embodiment 6: at 2 meters aluminium alloy anode oxide production lines, power unit is general silicon controlled rectifier current regulator power supply, anodised processing condition are: tank liquor composition sulfuric acid 188g/L, 23 ℃ of temperature, set 23 volts of whole voltages, 8 minutes anodic oxidation time length, other operation is identical with the titanium alloy anode oxidation technique of prior art with condition; Accessory size 150 * 100 material TC4 (flat-die forging), oxidation results is: the surface color blueness, thicknesses of layers 1.5 μ m, the rete outward appearance is firmly fine and close, and detected result is done, wet tape test is qualified.
Claims (2)
1, whole voltage method titanium alloy anode oxidation technique relates to a kind of titanium alloy thin layer sulfuric acid type anode oxidation process method, its processing condition are: the anode oxidation groove liquid composition is sulfuric acid 180～220g/L, tank liquor temperature is 13～25 ℃, anode voltage 18～24V, 2～15 minutes time, the invention is characterized in: during anodic oxidation, the anode voltage that is applied on the workpiece is the final magnitude of voltage of disposable setting in the processing condition to workpiece in tank liquor.
2, according to the whole voltage method titanium alloy anode oxidation technique of claim 1, it is characterized in that: the power unit of its outfit is the general silicon controlled rectifier current regulator power supply that a constant volume is arranged, its voltage stabilization and current stabilization value adjustable settings.
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| CN 200310103374 CN1611640A (en) | 2003-10-31 | 2003-10-31 | End voltage method titanium alloy anode oxidizing process |
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| CN 200310103374 CN1611640A (en) | 2003-10-31 | 2003-10-31 | End voltage method titanium alloy anode oxidizing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103553A (en) * | 2017-12-28 | 2018-06-01 | 大博医疗科技股份有限公司 | A kind of colorful anode oxidation membrane preparation method of titanium surface non-impurity-doped low defect |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103553A (en) * | 2017-12-28 | 2018-06-01 | 大博医疗科技股份有限公司 | A kind of colorful anode oxidation membrane preparation method of titanium surface non-impurity-doped low defect |
| CN108103553B (en) * | 2017-12-28 | 2019-11-26 | 大博医疗科技股份有限公司 | A kind of colorful anode oxidation membrane preparation method of titanium surface non-impurity-doped low defect |
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