CN103320781A - Chromium- free conversion coating method for aviation aluminum - Google Patents
Chromium- free conversion coating method for aviation aluminum Download PDFInfo
- Publication number
- CN103320781A CN103320781A CN201210072801XA CN201210072801A CN103320781A CN 103320781 A CN103320781 A CN 103320781A CN 201210072801X A CN201210072801X A CN 201210072801XA CN 201210072801 A CN201210072801 A CN 201210072801A CN 103320781 A CN103320781 A CN 103320781A
- Authority
- CN
- China
- Prior art keywords
- minutes
- tap water
- washing
- aluminium
- chrome
- 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
Images
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention belongs to an aviation manufacturing field, and relates to a chromium- free conversion coating method for aviation aluminum, comprising the following steps of: derosination, washing with water for a first time, pickling, ultrasonic cleaning, aftertreatment, chrome free, washing with water for a second time, and drying. The chromium- free conversion coating method for aviation aluminum has no harm on environment and human body health, makes no heavy metal chromium in a treated membrane generated on an aluminum surface, makes the chromium-free film have strong adhesive force with aluminum and a coating and be corrosion resisting corrosion resistant, and has advantages of easy operation, simple process flow and high stability.
Description
Technical field
The invention belongs to aviation and make the field, relate to a kind of Chrome-free formation processing method of aviation aluminium.
Background technology
Chemical conversion membrane technology in the aluminium is the technology that generates the mixture film that one deck is made up of substrate metal oxide, chromic salt, phosphoric acid salt or other compounds by chemistry in the metallic surface.But in traditional method, topmost shortcoming is to contain sexavalent chrome in the aluminium transforming agent.Chromium passivating technology has surface adhesion force and the corrosion resistance that satisfies the metal coated requirement, but sexavalent chrome is carcinogens, and there are very big hazardness in social environment and HUMAN HEALTH.
Summary of the invention
Technical purpose of the present invention is at the deficiencies in the prior art, providing a kind of does not have harm, does not contain heavy metal chromium in the processing film that aluminium material surface is generated environment and HUMAN HEALTH, make the rete of Chrome-free and aluminium sticking power and strong with coating adhesion, and the Chrome-free formation processing method of corrosion-resistant, easy handling, technical process is simple and direct, stability is high aviation aluminium.
The technical scheme that realizes the technology of the present invention purpose is: a kind of Chrome-free formation processing method of aviation aluminium may further comprise the steps:
Degreasing is removed surface dirt with aluminium, adopts organic solvent to remove surface and oil contaminant then, removes organic solvent again;
Washing was for the first time soaked 2 ~ 3 minutes with 20 ~ 40 ℃ of tap water, washed in the sprinkle mode with the normal temperature tap water again;
Pickling, submergence is 3 ~ 5 minutes under 50 ~ 70 ℃ of conditions, wherein Acidwash solution very much for being HF30 ~ 50% by weight percentage, HNO
330 ~ 50%, surplus is water;
Ultrasonic cleaning moves into aluminium in the ultrasonic cleaner, carries out ultrasonic cleaning, and the treatment time is 1 ~ 3 minute, and treatment temp is 20 ~ 45 ℃;
Aftertreatment moves into the aluminium product in the rear treating groove, carries out aftertreatment, 40 ~ 60 ℃ for the treatment of temps, 10 ~ 20 minutes treatment times;
No chromaking is solvent with the tap water, and membrane-forming agent position JM-510A 5 ~ 10g/L, film for additive are JM-510C 0.1 ~ 0.5g/L, and the PH scope is 2.5 ~ 3.5;
Washing was for the second time soaked 2 ~ 3 minutes with 20 ~ 40 ℃ of tap water, washed in the sprinkle mode with the normal temperature tap water again;
Drying, baking is 20 ~ 30 minutes in 100 ~ 200 ℃ baking oven.
As the further optimization of technique scheme, described organic solvent is ethanol or acetone.
As the further optimization of technique scheme, described removal organic solvent is with 40 ~ 50 ℃ heat soaking 30 ~ 120 minutes.
As the further optimization of technique scheme, after described pickling stage finishes, use 60 ~ 70 ℃ hot-water soak 10 ~ 30 minutes again, after the moisture on surface is dried up or dries.
As the further optimization of technique scheme, washing for the first time and the washing stage second time all need clean twice, and pure tap water is adopted in washing, described tap water specific conductivity＜100us/m, and the treatment time is 3 ~ 5 minutes.
Compared with prior art, the Chrome-free formation processing method beneficial effect of a kind of aviation aluminium of the present invention mainly shows as: environment and HUMAN HEALTH are not had harm, do not contain heavy metal chromium in the processing film that aluminium material surface is generated, make the rete of Chrome-free and aluminium sticking power and strong with coating adhesion, and corrosion-resistant, easy handling, technical process is simple and direct, stability is high.
Description of drawings
Figure 1 shows that the steps flow chart block diagram of the Chrome-free formation processing method of a kind of aviation aluminium of the present invention.
Embodiment
As one of most preferred embodiment of the Chrome-free formation processing method of a kind of aviation aluminium of the present invention, referring to accompanying drawing 1, may further comprise the steps:
Degreasing is removed surface dirt with aluminium, adopts organic solvent to remove surface and oil contaminant then, removes organic solvent again;
Washing was for the first time soaked 3 minutes with 40 ℃ of tap water, washed in the sprinkle mode with the normal temperature tap water again;
Pickling, submergence is 5 minutes under 70 ℃ of conditions, wherein Acidwash solution very much for being HF30% by weight percentage, HNO
350%, surplus is water;
Ultrasonic cleaning moves into aluminium in the ultrasonic cleaner, carries out ultrasonic cleaning, and the treatment time is 3 minutes, and treatment temp is 45 ℃;
Aftertreatment moves into the aluminium product in the rear treating groove, carries out aftertreatment, 60 ℃ for the treatment of temps, 20 minutes treatment times;
No chromaking is solvent with the tap water, and membrane-forming agent position JM-510A 10g/L, film for additive are JM-510C 0.5g/L, and the PH scope is 2.5;
Washing was for the second time soaked 3 minutes with 40 ℃ of tap water, washed in the sprinkle mode with the normal temperature tap water again;
Drying, baking is 20 minutes in 100 ℃ baking oven.
Described organic solvent is ethanol or acetone.
Described removal organic solvent is with 50 ℃ heat soaking 30 minutes.
After described pickling stage finishes, use 70 ℃ hot-water soak 10 minutes again, after the moisture on surface is dried up or dries.
Washing for the first time and the washing stage second time all need clean twice, and pure tap water is adopted in washing, described tap water specific conductivity＜100us/m, and the treatment time is 3 minutes.
In sum; after those of ordinary skill in the art reads file of the present invention; need not the replacement that scheme between other various corresponding conversion scheme or the various embodiments of the present invention is made in creative brainwork according to technical scheme of the present invention and technical conceive, all belong to the scope that the present invention protects.
Claims (5)
1. the Chrome-free formation processing method of an aviation aluminium is characterized in that, may further comprise the steps:
A. degreasing is removed surface dirt with aluminium, adopts organic solvent to remove surface and oil contaminant then, removes organic solvent again;
B. washing was for the first time soaked 2 ~ 3 minutes with 20 ~ 40 ℃ of tap water, washed in the sprinkle mode with the normal temperature tap water again;
C. pickling, submergence is 3 ~ 5 minutes under 50 ~ 70 ℃ of conditions, wherein Acidwash solution very much for being HF30 ~ 50% by weight percentage, HNO
330 ~ 50%, surplus is water;
D. ultrasonic cleaning moves into aluminium in the ultrasonic cleaner, carries out ultrasonic cleaning, and the treatment time is 1 ~ 3 minute, and treatment temp is 20 ~ 45 ℃;
E. aftertreatment moves into the aluminium product in the rear treating groove, carries out aftertreatment, 40 ~ 60 ℃ for the treatment of temps, 10 ~ 20 minutes treatment times;
F. not having chromaking, is solvent with the tap water, and membrane-forming agent position JM-510A 5 ~ 10g/L, film for additive are JM-510C 0.1 ~ 0.5g/L, and the PH scope is 2.5 ~ 3.5;
G. washing was for the second time soaked 2 ~ 3 minutes with 20 ~ 40 ℃ of tap water, washed in the sprinkle mode with the normal temperature tap water again;
H. dry, baking is 20 ~ 30 minutes in 100 ~ 200 ℃ baking oven.
2. the Chrome-free formation processing method of a kind of aviation aluminium according to claim 1 is characterized in that, described organic solvent is ethanol or acetone.
3. the Chrome-free formation processing method of a kind of aviation aluminium according to claim 1 is characterized in that, described removal organic solvent is with 40 ~ 50 ℃ heat soaking 30 ~ 120 minutes.
4. according to the Chrome-free formation processing method of the described a kind of aviation aluminium of claim, it is characterized in that, after described pickling stage finishes, use 60 ~ 70 ℃ hot-water soak 10 ~ 30 minutes again, after the moisture on surface is dried up or dries.
5. the Chrome-free formation processing method of a kind of aviation aluminium according to claim 1, it is characterized in that washing for the first time and the washing stage second time all need clean twice, pure tap water is adopted in washing, described tap water specific conductivity＜100us/m, the treatment time is 3 ~ 5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210072801XA CN103320781A (en) | 2012-03-20 | 2012-03-20 | Chromium- free conversion coating method for aviation aluminum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210072801XA CN103320781A (en) | 2012-03-20 | 2012-03-20 | Chromium- free conversion coating method for aviation aluminum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103320781A true CN103320781A (en) | 2013-09-25 |
Family
ID=49189811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210072801XA Pending CN103320781A (en) | 2012-03-20 | 2012-03-20 | Chromium- free conversion coating method for aviation aluminum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103320781A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501050A (en) * | 2020-04-30 | 2020-08-07 | 宁波江丰电子材料股份有限公司 | Surface treatment method of ultra-high purity aluminum |
| CN113804823A (en) * | 2021-09-15 | 2021-12-17 | 大连科技学院 | Aluminum material chromium-free passivation process aluminum content monitoring method based on digital twinning |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1970836A (en) * | 2006-12-01 | 2007-05-30 | 台山市金桥铝型材厂有限公司 | Environment-friendly surface treatment method for aluminium profile before spray coating |
| CN101942653A (en) * | 2010-10-09 | 2011-01-12 | 东莞宜安电器制品有限公司 | Magnesium alloy chrome-free formation treatment method |
-
2012
- 2012-03-20 CN CN201210072801XA patent/CN103320781A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1970836A (en) * | 2006-12-01 | 2007-05-30 | 台山市金桥铝型材厂有限公司 | Environment-friendly surface treatment method for aluminium profile before spray coating |
| CN101942653A (en) * | 2010-10-09 | 2011-01-12 | 东莞宜安电器制品有限公司 | Magnesium alloy chrome-free formation treatment method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501050A (en) * | 2020-04-30 | 2020-08-07 | 宁波江丰电子材料股份有限公司 | Surface treatment method of ultra-high purity aluminum |
| CN113804823A (en) * | 2021-09-15 | 2021-12-17 | 大连科技学院 | Aluminum material chromium-free passivation process aluminum content monitoring method based on digital twinning |
| CN113804823B (en) * | 2021-09-15 | 2024-03-15 | 大连科技学院 | Digital twinning-based aluminum content monitoring method for chromium-free passivation process of aluminum material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103320778B (en) | A kind of aviation pipe stainless steel passivation process | |
| CN105297045B (en) | A kind of stainless steel pipe surface cleaning method | |
| CN103952732A (en) | Metal super-hydrophobic surface and preparation method thereof | |
| CN103710688B (en) | The without phosphorus transforming agent of a kind of faintly acid | |
| CN102965675A (en) | Pickling passivation method of stainless steel | |
| CN1970836A (en) | Environment-friendly surface treatment method for aluminium profile before spray coating | |
| CN101942689A (en) | Micro-arc oxidation treatment method of magnesium alloy | |
| CN104131322A (en) | Aluminum product surface super-hydrophobic film and making method thereof | |
| CN104975284A (en) | Surface treatment process for cold-rolled stainless steel strip | |
| CN102051605A (en) | Method for anti-corrosive surface treatment of aluminum or aluminum alloy product | |
| CN104357858A (en) | Steel surface treating agent and preparation method thereof | |
| CN105350032B (en) | The plating technology of resist-nailed seat part coating | |
| CN102615037A (en) | Method for preparing super-hydrophobic green film on magnesium alloy substrate | |
| CN104178773A (en) | Chromium-free environmental-friendly silicon-contained aluminum and aluminum alloy surface treating agent and preparation method thereof | |
| CN103320781A (en) | Chromium- free conversion coating method for aviation aluminum | |
| CN106868490A (en) | A kind of environmentally friendly stainless steel blackening process method | |
| CN107130236A (en) | A kind of aluminum alloy surface passivation process for improving corrosion resistance | |
| CN103266326A (en) | Wire rope pickling method | |
| CN106637335A (en) | Embossed aluminum plate anodizing process | |
| CN103343346B (en) | A kind of technique improving aluminum or aluminum alloy surface anticorrosion performance | |
| CN103433190B (en) | Energy-saving and environment-friendly corrosion-preventing method of metal workpieces | |
| CN101906628A (en) | Phosphate conversion solution and method for processing surface of magnesium alloy by utilizing same | |
| CN104975282A (en) | Passivating agent for cold-rolled steel sheet | |
| CN109280912A (en) | A kind of aluminum alloy surface processing phosphating solution and method for bonderizing | |
| CN102146561B (en) | Film forming solution for zinc and zinc alloy surface environmentally-friendly blackened film and using method of film forming solution |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130925 |