CN108166041A - A kind of salt fog resistance corrosion titanium alloy and its manufacturing method - Google Patents
A kind of salt fog resistance corrosion titanium alloy and its manufacturing method Download PDFInfo
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- CN108166041A CN108166041A CN201711454621.7A CN201711454621A CN108166041A CN 108166041 A CN108166041 A CN 108166041A CN 201711454621 A CN201711454621 A CN 201711454621A CN 108166041 A CN108166041 A CN 108166041A
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- titanium alloy
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- tetrafluorosilane
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/26—Anodisation of refractory metals or alloys based thereon
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Abstract
The invention discloses a kind of salt fog resistance corrosion titanium alloy and its manufacturing methods, the salt fog resistance corrodes titanium alloy, its surface cure has the netted thin pore structure that titanium, boron, na oxide are formed, high-tension tetrafluorosilane is filled in these structures, also have outside the high-tension tetrafluorosilane and tetrafluorosilane is enclosed in interior crystallite wax layer, the microwax layer surface is fitted into the molecular layer that fine and close, 5 μm 8 μm of diameter fine silica powder is formed.The salt fog resistance corrosion titanium alloy own face of the present invention is with lotus-effect, hydrophobic, erosion resistant coating stability is good, shock resistance is good, applied widely.
Description
Technical field
The present invention relates to titanium alloy surface protection field more particularly to a kind of salt fog resistance corrosion titanium alloy and its manufacturers
Method.
Background technology
Titanium alloy has that specific strength is high, and medium temperature performance is good and the remarkable advantages such as elongation percentage height, but since there are high temperature resistance oxygen
The shortcomings that property changed is poor, salt spray corrosion resistance is bad strongly limits the application range of alloy.
The prior art mainly realizes the surface of titanium alloy by the anodization of titanium alloy blue or titanium-alloy surface micro-arc oxidation
Corrosion proof function, but no matter blue anodization or differential arc oxidation, technical purpose is that one layer of compact titanium dioxide film of generation is prevented
The only erosion of air and water, but this layer of titanium dioxide film is easily destroyed by the multiple components such as the carbonic acid in seawater or sulphur hydrogenation salt, from
And the corrosion-resistant coating realized by routine techniques is caused not adapt to prolonged salt air corrosion environment.Also have in the prior art and adopt
Anti-corrosion function, such as sprayed wc, molybdenum disulfide material are realized with surface spraying, but on the one hand this kind of material is closed with titanium
Auri body combination defective tightness (non-titanium alloy substrate generation), simultaneously because brittleness is larger, sprayed coating is relatively thin, is also easily impacted broken
It splits, shock resistance is poor.According to prior art correlative study, the special construction on lotus leaf surface has self-cleaning function, really
The ultra-hydrophobicity realized by microwax and surface texture, this has comparable instructive to titanium alloy surface anti-corrosion.
Therefore, be badly in need of on the market a kind of own face with lotus-effect, hydrophobic, erosion resistant coating stability is good, impact resistance
Salt fog resistance corrosion titanium alloy and its manufacturing method that can be good, applied widely.
Invention content
In view of the above defects of the prior art, the present invention is intended to provide a kind of own face have lotus-effect,
Hydrophobic, erosion resistant coating stability are good, shock resistance is good, salt fog resistance applied widely corrodes titanium alloy and its manufacturing method.
To achieve these goals, the present invention uses following technical scheme：A kind of manufacturer of salt fog resistance corrosion titanium alloy
Method includes the following steps：
1) prepare before production
1. surface modifying material prepares：Enough shot-peening ceramic pellets, enough tetrafluorosilanes, 0.1 μm -0.2 μm of enough grain sizes
Microwax, sufficient fluorinated sodium, enough sodium hypophosphites, sufficient amount of sulfuric acid sodium, enough sodium borohydrides, fine silver plate, 5 μm -8 of enough diameters
μm fine silica powder；
2) titanium alloy surface is modified
1. pending titanium alloy surface is handled using the ceramic pellet shot-blast process of 0.5MPa, 0.1A；
2. by the stage 1) sodium fluoride, sodium hypophosphite, sodium sulphate, the sodium borohydride that prepare match 10: 2: 1: 1 in mass ratio
Ratio is mixed and is dissolved in the pure water of 100 times of mixture gross mass, obtains bath；
3. controlling bath temperature at 5 DEG C -8 DEG C, using pending titanium alloy as surface cathode, fine silver plate is anode, by 4A/
dm2-6A/dm2Current density apply electric field, continue 4h-6h, obtain surface just handle titanium alloy；
4. surface just to be handled to titanium alloy infiltration in tetrafluorosilane, continue 1h-2h, then slowly promoted, until naked eyes can
Just processing titanium alloy is taken out when the tetrafluorosilane seen all is fallen after rise, obtains Seal treatment titanium alloy；
5. by the stage 1) prepare microwax melted in vacuum environment and be heated to 230 DEG C -240 DEG C, then by step
4. the Seal treatment titanium alloy obtained is immersed in the microwax molten bath of fusing, continue 8h-10h, then take out the conjunction of Seal treatment titanium
Gold obtains dehydrogenation sealing wax titanium alloy；
6. 5. dehydrogenation sealing wax titanium alloy surface to be treated that step is obtained use the stage 1) prepare fine silica powder
15min-20min is blown with the ejection pressure of 0.2MPa-0.3MPa, i.e., salt fog resistance corrosion titanium alloy needed for acquisition.
Titanium alloy is corroded using the salt fog resistance of above method manufacture, surface cure has the net that titanium, boron, na oxide are formed
Shape dredges pore structure, also has outside by tetrafluorosilane filled with high-tension tetrafluorosilane, the high-tension tetrafluorosilane in these structures
Interior crystallite wax layer is enclosed in, the microwax layer surface is fitted into fine and close, 5 μm -8 μm of diameter fine silica powder and forms
Molecular layer.
Compared with the prior art, the present invention has the following advantages as a result of said program：(1) using surface
Electrochemical oxidation technique, and using the solvent of almost hydrogen-free, while enter slot before processing in titanium alloy and do not pass through routine techniques
Pickling but gone by physical ceramic pellet shot-peening (process ruggedness is far below the conventional shot-peening to obtain bearing stress)
Except surface film oxide, in the prior art almost without use, the present invention is realized this mode by this low hydrogen electrochemical oxidation
Naked titanium alloy surface complex oxide film structure (since titanium alloy hydrogen absorption characteristic is very strong, the pickling of routine techniques and anodic oxygen
Change can lead to that titanium alloy substrate is significantly brittle, and service life substantially reduces).(2) present invention generates multiple in titanium alloy surface
After miscellaneous oxidation film, affine with titanium alloy surface and with hydrophobicity ocratation is enclosed in oxidation using the hole of oxidation film
In the reticular structure of film, the anti-corrosion notch of oxidation film has been blocked, has been better than existing sun with the isolation effect that oxidation film collectively forms
The close membrane of pole oxidation.(3) dehydrogenation conducive to the high-affinity and titanium alloy of microwax and ocratation is needed (even if making
It is micro- hydrogen solution, to ensure the optimal performance of titanium alloy, the present invention has still provided for high temperature dehydrogenation, higher than routine techniques
It is middle to use 180 DEG C of -200 DEG C of dehydrogenations of mineral oil), further the oxidation film of cellular structure is closed room temperature simultaneously using microwax
Under belong to the ocratation of liquid and be solidificated in titanium alloy surface.It (4), will using the characteristic of microwax low-intensity high tenacity high viscosity
The fine silica powder of physicochemical properties stabilizer pole is extruded by low pressure into crystallite wax body, forms one layer of compact silicon dioxide
Molecular layer, this layer of molecular layer collectively form the second layer protective layer of the present invention with microwax, and form and lotus flower lotus leaf surface
The very similar structure of structure, obtains surface lotus-effect.The present invention is sustainable in neutral, alkalinity, acid salt spray test
300h, will using the routine techniques of the product 96h of resistance to neutral salt spray test to marine environment far above national military standard without corroding
It asks.(5) Double-protection structure, and every layer of structure has duromer and flexible body, common cooperation enables the invention to adapt to higher
Shock and vibration requirement.
Specific embodiment
Embodiment 1：
A kind of salt fog resistance corrodes titanium alloy, and surface cure has the netted thin pore structure that titanium, boron, na oxide are formed, this
Filled with high-tension tetrafluorosilane in a little structures, the high-tension tetrafluorosilane also has outside is enclosed in tetrafluorosilane in interior crystallite
Wax layer, the microwax layer surface are fitted into the molecular layer that fine and close, 5 μm -8 μm of diameter fine silica powder is formed.
The manufacturing method of above-mentioned salt fog resistance corrosion titanium alloy, includes the following steps：
1) prepare before production
1. surface modifying material prepares：Enough shot-peening ceramic pellets, enough tetrafluorosilanes, 0.1 μm -0.2 μm of enough grain sizes
Microwax, sufficient fluorinated sodium, enough sodium hypophosphites, sufficient amount of sulfuric acid sodium, enough sodium borohydrides, fine silver plate, 5 μm -8 of enough diameters
μm fine silica powder；
2) titanium alloy surface is modified
1. pending titanium alloy surface is handled using the ceramic pellet shot-blast process of 0.5MPa, 0.1A；
2. by the stage 1) sodium fluoride, sodium hypophosphite, sodium sulphate, the sodium borohydride that prepare match 10: 2: 1: 1 in mass ratio
Ratio is mixed and is dissolved in the pure water of 100 times of mixture gross mass, obtains bath；
3. controlling bath temperature at 5 DEG C, using pending titanium alloy as surface cathode, fine silver plate is anode, by 4A/dm2
Current density apply electric field, continue 4h, obtain surface just handle titanium alloy；
4. surface just to be handled to titanium alloy infiltration in tetrafluorosilane, continue 1h, then slowly promoted, until macroscopic
Just processing titanium alloy is taken out when tetrafluorosilane is all fallen after rise, obtains Seal treatment titanium alloy；
5. by the stage 1) prepare microwax melted in vacuum environment and be heated to 230 DEG C, then 4. step is obtained
Seal treatment titanium alloy be immersed in the microwax molten bath of fusing, continue 8h-10h, then take out Seal treatment titanium alloy, obtain
Dehydrogenation sealing wax titanium alloy；
6. 5. dehydrogenation sealing wax titanium alloy surface to be treated that step is obtained use the stage 1) prepare fine silica powder
15min is blown with the ejection pressure of 0.2MPa, i.e., salt fog resistance corrosion titanium alloy needed for acquisition.
The salt fog resistance corrosion titanium alloy produced according to the present embodiment can tolerate sustainable 550h, alkali in neutral salt spray test
Property salt spray test 300h, acid salt spray test 420h.
Embodiment 2：
It is whole consistent with embodiment 1, it is in place of difference：
The manufacturing method of above-mentioned salt fog resistance corrosion titanium alloy, includes the following steps：
2) titanium alloy surface is modified
3. controlling bath temperature at 8 DEG C, using pending titanium alloy as surface cathode, fine silver plate is anode, by 6A/dm2
Current density apply electric field, continue 6h, obtain surface just handle titanium alloy；
4. surface just to be handled to titanium alloy infiltration in tetrafluorosilane, continue 2h, then slowly promoted, until macroscopic
Just processing titanium alloy is taken out when tetrafluorosilane is all fallen after rise, obtains Seal treatment titanium alloy；
5. by the stage 1) prepare microwax melted in vacuum environment and be heated to 240 DEG C, then 4. step is obtained
Seal treatment titanium alloy be immersed in the microwax molten bath of fusing, continue 10h, then take out Seal treatment titanium alloy, removed
Hydrogen sealing wax titanium alloy；
6. 5. dehydrogenation sealing wax titanium alloy surface to be treated that step is obtained use the stage 1) prepare fine silica powder
20min is blown with the ejection pressure of 0.3MPa, i.e., salt fog resistance corrosion titanium alloy needed for acquisition.
The salt fog resistance corrosion titanium alloy produced according to the present embodiment can tolerate sustainable 600h, alkali in neutral salt spray test
Property salt spray test 350h, acid salt spray test 450h.
The foregoing description of the disclosed embodiments, only for professional and technical personnel in the field is enable to realize or use this
Invention.A variety of modifications of these embodiments will be apparent for those skilled in the art, institute herein
The General Principle of definition can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore,
The present invention is not intended to be limited to the embodiments shown herein, and is to fit to special with principles disclosed herein and novelty
The consistent most wide range of point.
Claims (2)
1. a kind of manufacturing method of salt fog resistance corrosion titanium alloy, it is characterised in that include the following steps：
1) prepare before production
1. surface modifying material prepares：Enough shot-peening ceramic pellets, enough tetrafluorosilanes, 0.1 μm -0.2 μm of enough grain sizes it is micro-
Brilliant wax, sufficient fluorinated sodium, enough sodium hypophosphites, sufficient amount of sulfuric acid sodium, enough sodium borohydrides, fine silver plate, 5 μm -8 μm of enough diameters
Fine silica powder；
2) titanium alloy surface is modified
1. pending titanium alloy surface is handled using the ceramic pellet shot-blast process of 0.5MPa, 0.1A；
2. by the stage 1) sodium fluoride, sodium hypophosphite, sodium sulphate, the sodium borohydride that prepare match in mass ratio 10: 2: 1: 1 ratio
It mixes and is dissolved in the pure water of 100 times of mixture gross mass, obtain bath；
3. controlling bath temperature at 5 DEG C -8 DEG C, using pending titanium alloy as surface cathode, fine silver plate is anode, by 4A/dm2-
6A/dm2Current density apply electric field, continue 4h-6h, obtain surface just handle titanium alloy；
4. surface just to be handled to titanium alloy infiltration in tetrafluorosilane, continue 1h-2h, then slowly promoted, until macroscopic
Just processing titanium alloy is taken out when tetrafluorosilane is all fallen after rise, obtains Seal treatment titanium alloy；
5. by the stage 1) prepare microwax melted in vacuum environment and be heated to 230 DEG C -240 DEG C, then 4. step is obtained
The Seal treatment titanium alloy obtained is immersed in the microwax molten bath of fusing, is continued 8h-10h, is then taken out Seal treatment titanium alloy, obtain
Obtain dehydrogenation sealing wax titanium alloy；
6. 5. dehydrogenation sealing wax titanium alloy surface to be treated that step obtains is used into the stage 1) prepare fine silica powder with
The ejection pressure injection 15min-20min of 0.2MPa-0.3MPa, i.e., salt fog resistance corrosion titanium alloy needed for acquisition.
2. a kind of salt fog resistance using the manufacture of claim 1 the method corrodes titanium alloy, it is characterised in that：Its surface cure has
The netted thin pore structure that titanium, boron, na oxide are formed, these structures are interior filled with high-tension tetrafluorosilane, the high-tension four
Also have outside silicon fluoride and tetrafluorosilane is enclosed in interior crystallite wax layer, the microwax layer surface is fitted into densification, 5 μ of diameter
The molecular layer that m-8 μm of fine silica powder is formed.
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Citations (6)
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| JPS57152488A (en) * | 1981-03-13 | 1982-09-20 | Sumitomo Metal Ind Ltd | Pretreatment of ti or ti alloy for electroplating |
| JPH0598499A (en) * | 1991-10-07 | 1993-04-20 | Nippon Alum Co Ltd | Treatment of anodic oxidation of ti and ti alloy |
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| JPS57152488A (en) * | 1981-03-13 | 1982-09-20 | Sumitomo Metal Ind Ltd | Pretreatment of ti or ti alloy for electroplating |
| JPH0598499A (en) * | 1991-10-07 | 1993-04-20 | Nippon Alum Co Ltd | Treatment of anodic oxidation of ti and ti alloy |
| JPH09165697A (en) * | 1995-10-13 | 1997-06-24 | Kobe Steel Ltd | Patina copper sheet like colored titanium or titanium alloy material and its production |
| CN102586786A (en) * | 2012-03-19 | 2012-07-18 | 上海交通大学医学院附属第九人民医院 | Method for forming graded multi-hole shape on titanium surface |
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