CN106501480A - A kind of method for differentiating aluminium lithium alloy chromic acid anodizing deoxidation effect - Google Patents
A kind of method for differentiating aluminium lithium alloy chromic acid anodizing deoxidation effect Download PDFInfo
- Publication number
- CN106501480A CN106501480A CN201611080769.4A CN201611080769A CN106501480A CN 106501480 A CN106501480 A CN 106501480A CN 201611080769 A CN201611080769 A CN 201611080769A CN 106501480 A CN106501480 A CN 106501480A
- Authority
- CN
- China
- Prior art keywords
- contact angle
- chromic acid
- deoxidation
- lithium alloy
- acid anodizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention belongs to aluminium lithium alloy chromic acid anodizing deoxidation effect detection field, and in particular to a kind of simple method for differentiating aluminium lithium alloy chromic acid anodizing deoxidation effect.This method is tested using contact angle instrument, is determined contact angle of the water droplet after through deoxidation treatment on strip, is inspected the contact angle of water droplet, contact angle if greater than 0 ° then deoxidation effect not up to standard；Then deoxidation is up to standard equal to 0 ° for contact angle；Simple accurate, fast and reliable, improve production efficiency of the invention, reduce labor intensity, shorten detection time.
Description
Technical field
The invention belongs to aluminium lithium alloy chromic acid anodizing deoxidation effect detection field, and in particular to a kind of simple differentiation aluminum
The method of lithium alloy chromic acid anodizing deoxidation effect.
Background technology
In the last few years, in order to reduce the change of aircraft maintenance and navigation technology, a kind of high specific strength, low-density as far as possible
Aluminium alloy be increasingly subject to the concern of people, in aluminum, add the less elemental lithium of density be effectively reduced the entirety of alloy
Density, data shows, adds 1% in aluminum（Mass ratio）Elemental lithium alloy density can be made to decline 3%, and its elastic modelling quantity
Strengthen 6% or so.As aluminium lithium alloy understands precipitation strength phase δ when Ageing Treatment so as to which toughness and rigidity are significantly improved.
Therefore aluminium lithium alloy is generally considered one of most potential light-weight high-strength material.Although aluminium lithium alloy has excellent power
Learn performance, but its chemical property unstable, easily generation pitting, intercrystalline corrosion, stress corrosion fracture etc..For this purpose, to its carry out
Surface treatment becomes particularly important.
Numerous items are surface-treated to which using existing chromic acid anodizing at present, to improve its corrosion resistance, its
Middle deoxidization technique is a key technology for ensureing aluminium lithium alloy anodic oxidation film quality, and deoxidation purpose is to remove aluminium lithium alloy table
The oxide skin in face and corrosion product, if process parameter control is improper, deoxidation effect is poor, and corrosion product can be caused indivisible, affects
The corrosion resistance of film layer.This method is related to a kind of simple method for differentiating aluminium lithium alloy chromic acid anodizing deoxidation effect.
Content of the invention
It is an object of the invention to solving the above problems, there is provided a kind of simple accurate, differentiation aluminium lithium alloy of fast and reliable
The method of chromic acid anodizing deoxidation effect.
The present invention to achieve these goals, is adopted the following technical scheme that：
A kind of method for differentiating aluminium lithium alloy chromic acid anodizing deoxidation effect, this method are tested using contact angle instrument, are surveyed
Determine contact angle of the water droplet after through deoxidation treatment on strip, inspect the contact angle of water droplet, contact angle is then taken off if greater than 0 °
Oxygen effect is not up to standard；Then deoxidation is up to standard equal to 0 ° for contact angle；
The deoxidization technique parameter is：The volume ratio of HNO is：37.5%~10.6% ；Cr6+22.6~26.2g/l ；HF 16ml/
l ；25 DEG C of temperature；
Reach contact angle equal to 0 ° when, then deoxidation treatment effect is up to standard, then through follow-up chromic acid anodizing, closing process at
The aluminium lithium alloy chromic acid anodizing film of reason is continuous, color even, do not play powder, do not shade, and can pass through neutral salt spray test.
Further, the time of the neutral salt spray test is 336 hours.
Further, the time of the deoxidization technique is 3 min-15min.
Beneficial effects of the present invention
Simple accurate, fast and reliable, improve production efficiency of the invention, reduce labor intensity, shorten detection time.
Specific embodiment
Describe the present invention with reference to embodiment：
A kind of method for differentiating aluminium lithium alloy chromic acid anodizing deoxidation effect, this method are tested using contact angle instrument, are surveyed
Determine contact angle of the water droplet after through deoxidation treatment on strip, inspect the contact angle of water droplet, contact angle is then taken off if greater than 0 °
Oxygen effect is not up to standard；Then deoxidation is up to standard equal to 0 ° for contact angle；
The deoxidization technique parameter is：The volume ratio of HNO is：37.5%~10.6% ；Cr6+22.6~26.2g/l ；HF 16ml/
l ；25 DEG C of temperature；
Reach contact angle equal to 0 ° when, then deoxidation treatment effect is up to standard, then through follow-up chromic acid anodizing, closing process at
The aluminium lithium alloy chromic acid anodizing film of reason is continuous, color even, do not play powder, do not shade, and can pass through neutral salt spray test.
The time of the neutral salt spray test is 336 hours.
The time of the deoxidization technique is 3 min-15min.
Example 1 is 75 × 250 × 2.3 aluminium lithium alloy to size, carries out by Chromic Acid Anodizing Process flow process
Chromic acid anodizing, wherein deaeration time are 3min, measure contact angle for 3.4 ° of gained anode oxide films with contact angle instrument
Through 336 hours neutral salt spray tests, outward appearance had black speck, is unsatisfactory for production requirement.
Example 2 is 75 × 250 × 2.3 aluminium lithium alloy to size, carries out by Chromic Acid Anodizing Process flow process
Chromic acid anodizing, wherein deaeration time are 7min, measure contact angle for 0 ° of gained anode oxide film warp with contact angle instrument
336 hours neutral salt spray tests, outward appearance are greyish white, hot spot do not occur, meet production requirement.
Example 3 is 75 × 250 × 2.3 aluminium lithium alloy to size, carries out by Chromic Acid Anodizing Process flow process
Chromic acid anodizing, wherein deaeration time are 10min, measure contact angle for 0 ° of gained anode oxide film warp with contact angle instrument
336 hours neutral salt spray tests, outward appearance are greyish white, hot spot do not occur, meet production requirement.
Example 4 is 75 × 250 × 2.3 aluminium lithium alloy to size, carries out by Chromic Acid Anodizing Process flow process
Chromic acid anodizing, wherein deaeration time are 15min, measure contact angle for 0 ° of gained anode oxide film warp with contact angle instrument
336 hours neutral salt spray tests, outward appearance are greyish white, hot spot do not occur, meet production requirement.
What embodiments of the invention were announced is one of preferred embodiment, but is not limited thereto, the common skill of this area
Art personnel, easily according to above-described embodiment, make different amplifications and change, but as long as without departing from the spirit of the present invention, all existing
Within protection scope of the present invention.
Claims (3)
1. a kind of differentiate aluminium lithium alloy chromic acid anodizing deoxidation effect method, it is characterised in that：This method adopts contact angle
Analyzer is tested, and is determined contact angle of the water droplet after through deoxidation treatment on strip, is inspected the contact angle of water droplet, and contact angle is such as
Then deoxidation effect is not up to standard more than 0 ° for fruit；Then deoxidation is up to standard equal to 0 ° for contact angle；
The deoxidization technique parameter is：The volume ratio of HNO is：37.5%~10.6% ；Cr6+22.6~26.2g/l ；HF 16ml/l
；25 DEG C of temperature；
Reach contact angle equal to 0 ° when, then deoxidation treatment effect is up to standard, then through follow-up chromic acid anodizing, closing process at
The aluminium lithium alloy chromic acid anodizing film of reason is continuous, color even, do not play powder, do not shade, and can pass through neutral salt spray test.
2. according to claim 1 differentiate aluminium lithium alloy chromic acid anodizing deoxidation effect method, it is characterised in that：Institute
The time for stating neutral salt spray test is 336 hours.
3. according to claim 1 differentiate aluminium lithium alloy chromic acid anodizing deoxidation effect method, it is characterised in that：Institute
The time for stating deoxidization technique is 3 min-15min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611080769.4A CN106501480A (en) | 2016-11-30 | 2016-11-30 | A kind of method for differentiating aluminium lithium alloy chromic acid anodizing deoxidation effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611080769.4A CN106501480A (en) | 2016-11-30 | 2016-11-30 | A kind of method for differentiating aluminium lithium alloy chromic acid anodizing deoxidation effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106501480A true CN106501480A (en) | 2017-03-15 |
Family
ID=58327321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611080769.4A Pending CN106501480A (en) | 2016-11-30 | 2016-11-30 | A kind of method for differentiating aluminium lithium alloy chromic acid anodizing deoxidation effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106501480A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956367A (en) * | 2018-08-07 | 2018-12-07 | 广东兴发铝业有限公司 | A kind of assessment method of anode oxide film sealing quality |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539495A (en) * | 2012-01-16 | 2012-07-04 | 南昌航空大学 | Method for analyzing deoxidized bath solution for chromic acid anodizing of aluminum alloys |
| CN102605405A (en) * | 2011-12-20 | 2012-07-25 | 中国航空工业集团公司北京航空材料研究院 | Anodization method for improving protection performance of aluminum and aluminum alloy |
| CN103388167A (en) * | 2013-08-18 | 2013-11-13 | 中航沈飞民用飞机有限责任公司 | Protective treatment method of aluminum alloy surface |
| CN104404593A (en) * | 2014-11-29 | 2015-03-11 | 江西洪都航空工业集团有限责任公司 | Method for easily judging chromic acid anode oxidizing and deoxidizing effect of aluminum lithium alloy |
| CN105463549A (en) * | 2015-12-03 | 2016-04-06 | 中国航空工业集团公司北京航空材料研究院 | Anodizing method improving protection performance of aluminum and aluminum alloy |
-
2016
- 2016-11-30 CN CN201611080769.4A patent/CN106501480A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605405A (en) * | 2011-12-20 | 2012-07-25 | 中国航空工业集团公司北京航空材料研究院 | Anodization method for improving protection performance of aluminum and aluminum alloy |
| CN102539495A (en) * | 2012-01-16 | 2012-07-04 | 南昌航空大学 | Method for analyzing deoxidized bath solution for chromic acid anodizing of aluminum alloys |
| CN103388167A (en) * | 2013-08-18 | 2013-11-13 | 中航沈飞民用飞机有限责任公司 | Protective treatment method of aluminum alloy surface |
| CN104404593A (en) * | 2014-11-29 | 2015-03-11 | 江西洪都航空工业集团有限责任公司 | Method for easily judging chromic acid anode oxidizing and deoxidizing effect of aluminum lithium alloy |
| CN105463549A (en) * | 2015-12-03 | 2016-04-06 | 中国航空工业集团公司北京航空材料研究院 | Anodizing method improving protection performance of aluminum and aluminum alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956367A (en) * | 2018-08-07 | 2018-12-07 | 广东兴发铝业有限公司 | A kind of assessment method of anode oxide film sealing quality |
| CN108956367B (en) * | 2018-08-07 | 2021-02-19 | 广东兴发铝业有限公司 | Method for evaluating hole sealing quality of anodic oxide film |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Arrabal et al. | Assessment of duplex coating combining plasma electrolytic oxidation and polymer layer on AZ31 magnesium alloy | |
| CN108754474B (en) | A kind of stabilized treatment fluid of acceleration weathering steel rusty scale | |
| Dejun et al. | Salt spray corrosion and electrochemical corrosion properties of anodic oxide film on 7475 aluminum alloy | |
| CN104372323B (en) | Aqueous passivator of aluminium alloy non-chromium and preparation method thereof | |
| CN103805977A (en) | Chromium-free passivation liquid for treating tin-plated steel plate | |
| CN105734574A (en) | Polishing solution | |
| US20150225678A1 (en) | Electrolytic copper foil, cleaning fluid composition and method for cleaning copper foil | |
| Ramezanzadeh et al. | Effects of Co (II) and Ni (II) on the surface morphology and anticorrosion performance of the steel samples pretreated by Cr (III) conversion coating | |
| CN107151810B (en) | Aluminium alloy extrusions and its manufacturing method | |
| CN105483814B (en) | Layer stripping measures the electrolytic polishing liquid and polishing method of magnesium-rare earth residual stress | |
| TW201812111A (en) | Tin based alloy plated steel sheet | |
| CN106501480A (en) | A kind of method for differentiating aluminium lithium alloy chromic acid anodizing deoxidation effect | |
| CN104357825A (en) | Tinned steel plate surface treatment solution and preparation method thereof | |
| CN105316741B (en) | A kind of method for carrying out surface by micro-arc oxidation processing to aluminium alloy using grading current | |
| CN103614757B (en) | A kind of enclosure method of aluminum alloy surface porous-film rare earth | |
| CN105543937A (en) | Electrolytic passivation solution for stainless steel cookware and passivation technique thereof | |
| CN104451636A (en) | Chromium-free passivation solution for tin-plated steel plate and preparation method of chromium-free passivation solution | |
| CN104404593A (en) | Method for easily judging chromic acid anode oxidizing and deoxidizing effect of aluminum lithium alloy | |
| CN102277086B (en) | Environment-friendly chrome-free fingerprint-resistant treating agent for stainless steel | |
| CN105820633A (en) | Water-based flash-rust inhibitor and application thereof | |
| CN102677120A (en) | Hole sealing treatment method for aluminum and aluminum alloy anodized films | |
| CN104357826A (en) | Technical formula of black chemical oxidation of stainless steel | |
| CN103088329A (en) | Aluminum alloy treating agent before application | |
| Kannan et al. | Performance of a magnesium-rich primer on pretreated AA2024-T351 in selected laboratory and field environments: anodization pretreatment | |
| CN103469275A (en) | Blue colorant and coloring method for aluminum material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170315 |
|
| RJ01 | Rejection of invention patent application after publication |