CN105887151A - Corrosion resistance sulfuric acid hard anodizing process - Google Patents
Corrosion resistance sulfuric acid hard anodizing process Download PDFInfo
- Publication number
- CN105887151A CN105887151A CN201610341907.3A CN201610341907A CN105887151A CN 105887151 A CN105887151 A CN 105887151A CN 201610341907 A CN201610341907 A CN 201610341907A CN 105887151 A CN105887151 A CN 105887151A
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- corrosion resistance
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- sulfuric acid
- hydrochloric acid
- hard
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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
- C25D11/04—Anodisation of aluminium or alloys based thereon
-
- 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
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The invention belongs to the technical field of sulfuric acid anodizing processes, and relates to an aluminum alloy corrosion resistance hard anodizing process. The process comprises the specific steps that a workpiece of an aluminum alloy 6061-T6/T651 material is subjected to sulfuric acid anodizing treatment, and the workpiece is subjected to hard anodizing treatment; the workpiece is put into a sulfuric acid solution of 10%wt to 15%wt, the temperature is controlled to range from -1 DEG C to 1 DEG C, the current density is adjusted to range from 1 A/dm<2> to 1.5 A/dm<2>, the current increase time ranges from 5 min to 10 min, the response time ranges from 3 h to 4 h, and the film thickness is required to range from 50 micrometers to 100 micrometers; the workpiece is subjected to hole sealing treatment, the anodized workpiece is put into pure water with the temperature ranging from 92 DEG C to 100 DEG C for hole sealing, and the hole sealing time ranges from 4 h to 6 h; and compressed air is used for blow-drying, and standing is carried out for 24 h. Thus, a compact oxidation film is obtained, the anode film is subjected to a 5% hydrochloric acid bubble corrosion resistance test to observe the corrosion resistance of the anode film, the corrosion resisting time reaches 8 h or above, and the high corrosion performance is achieved accordingly.
Description
Technical field
The invention belongs to sulfuric acid hard anode technology field, particularly relate to a kind of corrosion resistance sulfuric acid hard sun
Pole oxidation technology, it is adaptable to the crucial corrosion resistance reaction cavity hard anodic process of IC assembling.
Background technology
Corrosion resistance sulfuric acid Hard Anodic Oxidation Process, has its special importance.Sulfuric acid hard anodic process
Owing to its property has a wide range of applications in the industrial production, to hard anodic process performance in IC field
Will gas more and more higher, the especially decay resistance of anode film, its extensively application and key reaction cavity and other
Key components and parts, exploitation has relatively highly corrosion resistant hard anode, improves equipment performance and has service life important
Meaning.
Summary of the invention
For the technical problem of above-mentioned existence, the present invention provides a kind of corrosion resistance sulfuric acid hard anodizing work
Skill, carries out sulphuric acid anodizing process to aluminum alloy materials workpiece, dense by controlling sulfuric acid in anodic process
Degree, reaction temperature, and current density etc..Thus obtaining the oxide-film of densification, this anode film carries out the salt of 5%
The acid gas bubble corrosion resistance testing time reaches more than 8h, has high corrosion resistance energy.
It is an object of the invention to be achieved through the following technical solutions:
Corrosion resistance sulfuric acid Hard Anodic Oxidation Process of the present invention, comprises the steps:
(1) aluminum alloy materials 6061-T6/T651 workpiece is carried out anode pre-treatment, first polishing grinding work
Part surface, it is desirable to Ra < 16uin, after cleaning up, removes surface scale, uses nitric acid to wash away after washing
Except surface impurity；
(2) workpiece is carried out hard anodizing process: put the workpiece in the sulfuric acid solution of 10-15%wt,
Controlling temperature is-1～1 DEG C, and adjustment current density is 1-1.5A/dm2, the up-flow time is 5-10min, reaction
Time is 3-4h, it is desirable to thickness 50-100um；
(3) workpiece is carried out sealing pores, good for anode workpiece is put in the pure water of 92-100 DEG C through row envelope
Hole, the sealing of hole time is 4-6 hour；Use compressed air dries up, static 24 hours；
(4) hydrochloric acid solution using 5%wt is tested through row hydrochloric acid bubble corrosion resistance, and corrosion resistance sulfuric acid is hard
The matter anode oxidation process test piece corrosion resistance testing time reaches more than 8h.
Further, described pre-treatment uses alkali to bite away except surface scale, uses 50% nitric acid to wash after washing
Remove surface impurity.
Further, controlling parameter is: temperature is-1～1 DEG C, and adjusting current density is 1～1.5A/dm2,
The up-flow time is 5～10min.
Further, described hydrochloric acid solution is tested i.e. through row hydrochloric acid bubble corrosion resistance: is used by glass tube and hides
Sealing water, sticks to strip, adds test 5%wt hydrochloric acid solution liquid level height 2-in glass tube
3cm, test zone solution emitted more than three bubbles at same o'clock in one second continuously, represented test knot
Bundle, the record end time.
The invention have the benefit that
The present invention can be effectively improved the anode film of the decay resistance of workpiece, uses the hydrochloric acid solution warp of 5%wt
Row Bubble Test, will use screening sealing water by glass tube, stick to strip, add in glass tube
Entering test 5%wt hydrochloric acid solution liquid level height 2-3cm, test zone solution connected in one second for same o'clock
Continue and emit more than three bubbles, represent test and terminate, the record end time.Corrosion resistance sulfuric acid hard anodic oxygen
The metallization processes test piece corrosion resistance testing time reaches more than 8h.
Detailed description of the invention
Describe the present invention below in conjunction with embodiment.
Embodiment 1: the present invention comprises the steps: that aluminum alloy materials 6061-T6/T651 workpiece is entered by (1)
Row anode pre-treatment, first polishing grinding surface of the work, it is desirable to Ra < 16uin, after cleaning up, carry out alkali
Bite away except surface scale, after washing, use nitric acid to wash away except surface impurity.
(2) workpiece is carried out hard anodizing process, put the workpiece in the sulfuric acid solution of 12%wt, control
Temperature is 0 DEG C, and adjustment current density is 1A/dm2, the up-flow time is 7min, and the reaction time is 3.5h,
Seek thickness 80um.
(3) workpiece is carried out sealing pores, good for anode workpiece is put in the pure water of 96 DEG C through row sealing of hole, envelope
The hole time is 5 hours.Use compressed air, static 24 hours.
(4) hydrochloric acid solution using 5%wt is tested through row hydrochloric acid bubble corrosion resistance, will use by glass tube
Hide sealing water, stick to strip, in glass tube, add test 5%wt hydrochloric acid solution liquid level high
2.5cm, test zone solution emitted more than three bubbles at same o'clock in one second continuously, represented test knot
Bundle, the record end time.The corrosion resistance sulfuric acid Hard Anodic Oxidation Process test piece corrosion resistance testing time reaches
To more than 8h.
Described pre-treatment uses alkali to bite away except surface scale, uses 50% nitric acid to wash away except surface is miscellaneous after washing
Matter.
Embodiment 2: this example as different from Example 1: in this example step (2) workpiece is carried out hard sun
Pole oxidation processes, puts the workpiece in the sulfuric acid solution of 10%wt, controls temperature and is-1 DEG C, adjusts current density
For 1A/dm2, the up-flow time is 5min, and the reaction time is 3h, it is desirable to thickness 50um.
Workpiece is carried out sealing pores by step (3), and good for anode workpiece is put into warp in the pure water of 92-100 DEG C
Row sealing of hole, the sealing of hole time is 4 hours.
The hydrochloric acid solution liquid level height 2cm of step (4).
Embodiment 3: this example as different from Example 1: in this example step (2) workpiece is carried out hard sun
Pole oxidation processes, puts the workpiece in the sulfuric acid solution of 15%wt, and controlling temperature is 1 DEG C, adjusts current density and is
1.5A/dm2, the up-flow time is 10min, and the reaction time is 4h, it is desirable to thickness 100um.
Workpiece is carried out sealing pores by step (3), and good for anode workpiece is put into warp in the pure water of 92-100 DEG C
Row sealing of hole, the sealing of hole time is 6 hours.
The hydrochloric acid solution liquid level height 3cm of step (4).
Claims (4)
1. corrosion resistance sulfuric acid Hard Anodic Oxidation Process, it is characterised in that: comprise the steps:
(1) aluminum alloy materials 6061-T6/T651 workpiece is carried out anode pre-treatment, first polishing grinding work
Part surface, it is desirable to Ra < 16uin, after cleaning up, removes surface scale, uses nitric acid to wash away after washing
Except surface impurity；
(2) workpiece is carried out hard anodizing process: put the workpiece in the sulfuric acid solution of 10-15%wt,
Controlling temperature is-1～1 DEG C, and adjustment current density is 1-1.5A/dm2, the up-flow time is 5-10min, reaction
Time is 3-4h, it is desirable to thickness 50-100um；
(3) workpiece is carried out sealing pores, good for anode workpiece is put in the pure water of 92-100 DEG C through row envelope
Hole, the sealing of hole time is 4-6 hour；Use compressed air dries up, static 24 hours；
(4) hydrochloric acid solution using 5%wt is tested through row hydrochloric acid bubble corrosion resistance, and corrosion resistance sulfuric acid is hard
The matter anode oxidation process test piece corrosion resistance testing time reaches more than 8h.
2. corrosion resistance sulfuric acid Hard Anodic Oxidation Process as claimed in claim 1, it is characterised in that: described
Pre-treatment uses alkali to bite away except surface scale, uses 50% nitric acid to wash away except surface impurity after washing.
3. corrosion resistance sulfuric acid Hard Anodic Oxidation Process as claimed in claim 1, it is characterised in that control ginseng
Number is: temperature is-1～1 DEG C, adjust current density be 1～1.5A/dm2, the up-flow time be 5～
10min。
4. according to corrosion resistance sulfuric acid Hard Anodic Oxidation Process described in claim 1, it is characterised in that: institute
State hydrochloric acid solution to test i.e. through row hydrochloric acid bubble corrosion resistance: used by glass tube and hide sealing water, stick to examination
Sheet surface, adds test 5%wt hydrochloric acid solution liquid level height 2-3cm in glass tube, and test zone solution is same
Within one o'clock, in one second, emit more than three bubbles continuously, represent test and terminate, the record end time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610341907.3A CN105887151A (en) | 2016-05-23 | 2016-05-23 | Corrosion resistance sulfuric acid hard anodizing process |
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| CN201610341907.3A CN105887151A (en) | 2016-05-23 | 2016-05-23 | Corrosion resistance sulfuric acid hard anodizing process |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835229A (en) * | 2017-02-14 | 2017-06-13 | 哈尔滨东安发动机（集团）有限公司 | A kind of tube kind part hard anodized method long |
| CN108179453A (en) * | 2017-12-30 | 2018-06-19 | 沈阳富创精密设备有限公司 | A kind of bright anode pre-treating technology of aluminium alloy |
| CN108193250A (en) * | 2018-02-24 | 2018-06-22 | 沈阳富创精密设备有限公司 | A kind of sulfuric acid+nitration mixture mixing anode oxidation process |
| CN109014781A (en) * | 2018-08-06 | 2018-12-18 | 常州朗卓机电科技有限公司 | A kind of processing technology of the flexible water pipe of fire fighting truck |
| CN109056023A (en) * | 2018-08-24 | 2018-12-21 | 沈阳富创精密设备有限公司 | Sulfuric acid+oxalic acid nitration mixture anode oxidation process |
| CN111394767A (en) * | 2020-03-30 | 2020-07-10 | 沈阳富创精密设备有限公司 | Special process method for reducing hard anode cracks |
| CN111575762A (en) * | 2020-03-30 | 2020-08-25 | 沈阳富创精密设备有限公司 | Process for preparing titanium alloy high-performance anode film |
| CN111850654A (en) * | 2020-06-29 | 2020-10-30 | 沈阳富创精密设备有限公司 | Special process for hard anode used in high-temperature environment |
| CN111876777A (en) * | 2020-07-24 | 2020-11-03 | 沈阳富创精密设备有限公司 | Manufacturing process of etching equipment restraint ring |
| CN113913894A (en) * | 2021-10-11 | 2022-01-11 | 佛山市金锋锐钛铝汽缸管有限公司 | Preparation method of hard oxidation cylinder sleeve |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835229A (en) * | 2017-02-14 | 2017-06-13 | 哈尔滨东安发动机（集团）有限公司 | A kind of tube kind part hard anodized method long |
| CN108179453A (en) * | 2017-12-30 | 2018-06-19 | 沈阳富创精密设备有限公司 | A kind of bright anode pre-treating technology of aluminium alloy |
| CN108193250A (en) * | 2018-02-24 | 2018-06-22 | 沈阳富创精密设备有限公司 | A kind of sulfuric acid+nitration mixture mixing anode oxidation process |
| CN109014781A (en) * | 2018-08-06 | 2018-12-18 | 常州朗卓机电科技有限公司 | A kind of processing technology of the flexible water pipe of fire fighting truck |
| CN109014781B (en) * | 2018-08-06 | 2021-05-07 | 常州朗卓机电科技有限公司 | Processing technology of fire fighting truck telescopic water pipe |
| CN109056023A (en) * | 2018-08-24 | 2018-12-21 | 沈阳富创精密设备有限公司 | Sulfuric acid+oxalic acid nitration mixture anode oxidation process |
| CN111394767A (en) * | 2020-03-30 | 2020-07-10 | 沈阳富创精密设备有限公司 | Special process method for reducing hard anode cracks |
| CN111575762A (en) * | 2020-03-30 | 2020-08-25 | 沈阳富创精密设备有限公司 | Process for preparing titanium alloy high-performance anode film |
| CN111850654A (en) * | 2020-06-29 | 2020-10-30 | 沈阳富创精密设备有限公司 | Special process for hard anode used in high-temperature environment |
| CN111876777A (en) * | 2020-07-24 | 2020-11-03 | 沈阳富创精密设备有限公司 | Manufacturing process of etching equipment restraint ring |
| CN113913894A (en) * | 2021-10-11 | 2022-01-11 | 佛山市金锋锐钛铝汽缸管有限公司 | Preparation method of hard oxidation cylinder sleeve |
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