CN1227280A - Chemical removing technology for composite coating of aircraft engine steel blade before low temperature aluminizing - Google Patents
Chemical removing technology for composite coating of aircraft engine steel blade before low temperature aluminizing Download PDFInfo
- Publication number
- CN1227280A CN1227280A CN 99114613 CN99114613A CN1227280A CN 1227280 A CN1227280 A CN 1227280A CN 99114613 CN99114613 CN 99114613 CN 99114613 A CN99114613 A CN 99114613A CN 1227280 A CN1227280 A CN 1227280A
- Authority
- CN
- China
- Prior art keywords
- solution
- add
- blade
- water
- low temperature
- 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.)
- Granted
Links
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The removing scheme uses removing solution comprising potassium (sodium) hydroxide, sodium (potassium) nitrate, potassium permanganate and salt of organic acid. The solution can eliminate aluminum layer fast to passivate the interface between the permeated layer and the substrate, and break the -Si-O-Si-bond in the inorganic silicate polymer film or dissolve the film through the action of oxidant. The technological process features that the blade is needed only to be soaked in the solution for several min. before water washing and drying. It is saving in time and labor, and has no harmful effect on base material.
Description
The present invention relates to a kind of chemistry and remove the production technique of engine steel blade before low temperature aluminizing compound coating.
Compound coating is to be made of low temperature aluminizing layer+modified Portland ceramic topcoats.The chemical ingredients of low temperature aluminizing layer mainly is Fe
2Al
5And FeAl
3Detection shows that the thickness of aluminized coating is about 12 μ m.In matrix 11 μ m depths, Al concentration reaches 6% generally speaking, and is high more near surfaces A l concentration more, upper layer is up to 68%, and 16-20 μ m depths begins to be the composition of base material own under matrix, and therefore, whole aluminized coating is to be rich in Al, Cr the Fe base from chemical ingredients.
Modified Portland salt ceramic topcoats then is on the aluminized coating surface, be coated with equably or the silicate of about 2～6 μ m of spray one bed thickness, and form-Si-O-Si-key inorganic polymer rete through dehydration, as the important mechanical barrier in compound coating surface, closely be attached to aluminized coating and provide the abrasion resistance energy it.
But,, do not see that but bibliographical information crosses chemical removal method to a kind of like this compound coating.Some production unit adopts mechanical polishing or abrasive paper for metallograph manual grinding, and the unit that also has adopts the mechanical means of blast, shot-peening and so on.But it is big that such method exists labour intensity, and efficient is low, the uppity drawback of matrix size, and the utmost point does not fit into batch process, the batch process when particularly the band coating blade is reprocessed.Therefore, the part of whole complete process when the removal of research low temperature aluminizing compound coating is not only the production process floating coat and is reprocessed, and be to solve the requisite important procedure that blade at first will run in overhauling.
Task of the present invention is a kind of chemical process of effectively removing the low temperature aluminizing compound coating under the prerequisite of not damaging matrix of development.
Technology of the present invention has been finished above-mentioned design objective preferably, it is characterized in that it being to cause the body material passivation, and can remove the technology of the chemical cleaning solution removal blade surface compound coating of engine steel working-blade low temperature aluminizing compound coating more up hill and dale with a kind of.The chemical cleaning solution that uses in technology is a kind of alkaline cleaning fluid, and its compound method is as follows:
One, preparation basic solution
Prescription (by heavy part) is as follows:
Sodium hydroxide or potassium hydroxide 30～200
SODIUMNITRATE 20～100
Potassium permanganate 10～60
Organic acid salt 1～20
Water 620～939
Two, compound method:
In molten device, add 500 parts of tap water earlier, connect formulation selection again and add organic acid salt, add SODIUMNITRATE (or saltpetre) while hot after stirring, dissolve evenly, treat to add potassium permanganate after solution is cooled to room temperature, stir, adding water to gross weight is 1000 parts, promptly obtains required basic solution after mixing.
Three, clean the working method of removing compound coating:
But in a steam heating or electrically heated, and the enough solution of preparation in the steel tank of band exhausting system, cleaning solution is heated to 80～100 ℃, pack into the stainless steel basket and to be with the blade of aluminized coating, and hang in the solution of heating, kept 5～10 minutes, the stainless steel basket is hung out, directly wash down in the immersion tap water, use the hot water injection more than 60 ℃ again.
This solution has not only reached can remove aluminized coating fast, causes the matrix passivation at aluminized coating and matrix dividing point, also can be apace under the effect of oxygenant with in the inorganic silicate macromolecule membranous layer-the Si-O-Si-key interrupts, destroys or the dissolving rete.Here it is, and this chemical method is removed the compound mechanism of removing layer.This chemical process is removed the advantage of compound coating technology, and being only needs blade dipping several minutes in the solution of regulation, and water is rinsed well, dried and get final product again, and is time saving and energy saving, and base material is had no adverse effect.
In order to make aluminized coating remove more thoroughly, the present invention has also introduced the anode that a kind of removal residues in the blade surface reactant and has removed membrane method, it is characterized in that:
One, membrane removal liquid formula (by weight) is as follows:
Sodium hydroxide (or potassium hydroxide) 10～60
SODIUMNITRATE (or saltpetre) 5～30
Tripoly phosphate sodium STPP 10～20
Water 890～975
Two, the method for preparation membrane removal liquid is as follows:
Earlier in a certain amount of water, add tripoly phosphate sodium STPP, add other two kinds of pharmaceutical chemicalss after the dissolving more respectively by the prescription share, no matter successively, add water to again after being dissolved in water evenly 1000 parts standby.
Three, membrane removal working method:
At a constant voltage is 12V, and anodic current is the 3-6A/ decimetre
2Condition under blade is connected on the anode, negative electrode adopts stainless steel plate, the stainless steel plate area is 1: 1 with the ratio of blade area, solution is heated to 40～60 ℃, blade is immersed in the solution, soak and take out blade after 1～3 minute, rinse well in being not less than 60 ℃ hot water, compressed air blow drying gets final product.
The present invention adopts the alkaline solution that contains strong oxidizing property that aluminising composite cementation coating is removed, guaranteed that blade matrix size and intensity are all unaffected, repeatedly reliability, advance, the operability of alumetizing process have been made significant contribution in order to guarantee aircraft engine steel working-blade.
Enumerate embodiment below:
Example 1:
In stainless steel vessel, add the 500kg tap water, add the 5kg sodium oxalate again, 40kg sodium hydroxide, stirring, add while hot after the dissolving evenly SODIUMNITRATE 20kg treats that solution is cooled to and adds 20kg potassium permanganate after the room temperature and stir, adding water to gross weight is 1000kg, promptly gets needed 1000kg basic solution after mixing.
This solution is injected in the A3 steel tank, be heated to 80 ℃, pack into the stainless steel basket and overhaul blade, and be immersed in the solution of heating and flooded 6 minutes, hang out, immerse in the tap water and wash, and then with the hot water injection who is not less than 60 ℃, and dry up with pressurized air.
Example 2:
One, in being arranged, the A3 steel tank of electric heating tube and exhausting system prepares basic cleaning solution.In channel-section steel, inject the 500kg tap water earlier, add the 20kg Trisodium Citrate again, treat that its dissolving back adds potassium hydroxide 180kg, add saltpetre 100kg while hot after stirring, dissolving, stir, add 40kg potassium permanganate after being chilled to room temperature, add water 160kg, promptly make the 1000kg alkaline cleaning fluid after the dissolving evenly.Standby.
Two, preparation anode membrane removal liquid in can heating stainless steel tank.Inject the 500kg tap water earlier, add tripoly phosphate sodium STPP 20kg, add potassium hydroxide 50kg and SODIUMNITRATE 20kg after the dissolving again, add water 410kg and fully stir, promptly make 1000kg anode membrane removal liquid after the dissolving.
Three, remove the compound coating operation.With the blade stainless steel basket of packing into, and hang in that submergence hung out after 8 minutes in the thermokalite scavenging solution that is heated to 100 ℃, directly immerse in the tap water and clean, and then with 60 ℃ of hot water injections, and enter down the road and remove membrane process.
Four, anode removes membrane operations.At constant voltage is 12V, and d.c. anode current is 5A/dm
2Condition under, blade is connected on the anode, the anode stainless steel plate, blade is 1: 1 with the ratio of anode stainless steel plate area.Blade and stainless steel plate are immersed in immersion taking-up after 3 minutes in the anode membrane removal liquid that is heated to 50 ℃, and rinse well in 65 ℃ hot water, pressurized air dries up, and has promptly finished the thorough removing technology to the low temperature aluminizing compound coating.
Claims (2)
1, the composite coating of aircraft engine steel blade before low temperature aluminizing chemistry is removed technology, it is characterized in that to heat and being with the enough basic cleaning solution of the interior preparation of steel tank of exhausting system, solution is heated to 80～100 ℃, pack into the stainless steel basket and to be with the blade of aluminized coating, and immerse soak slag in the solution be heated to temperature 5～10 minutes, hang out, immerse in the tap water and wash, use the hot water injection who is not less than 60 ℃ after the flushing again, and dry up with pressurized air.
The compound method of the basic solution that uses in this technology is as follows:
One, preparation basic solution
Prescription (by weight)
Sodium hydroxide or potassium hydroxide 30～200
SODIUMNITRATE 20～100
Potassium permanganate 10～60
Organic acid salt 1～20
Water 620～939
Two, compound method is: add 500 parts of tap water earlier in container, add organic acid salt by formulation selection again, stir, add SODIUMNITRATE while hot after the dissolving evenly, treat to add potassium permanganate after solution is cooled to room temperature, stir, add water to 1000 parts, promptly get required basic solution after mixing.
2, composite coating of aircraft engine steel blade before low temperature aluminizing as claimed in claim 1 chemistry is removed technology, it is characterized in that the reaction product that adopts membrane removal liquid will residue in blade surface disposes,
Described membrane removal liquid formula (by weight) is as follows:
Sodium hydroxide or potassium hydroxide 10～60
SODIUMNITRATE or saltpetre 5～30
Tripoly phosphate sodium STPP 10～20
Water 890～975
The method of preparation membrane removal liquid is as follows:
Add tripoly phosphate sodium STPP by the prescription share earlier in 500 parts water, add other two kinds of pharmaceutical chemicalss after the dissolving more respectively, no matter successively, it is standby to add water to 1000 parts of gross weights after the dissolving evenly.
The membrane removal working method:
At a constant voltage is 12V, and anodic current is 3-6A/dm
2Condition under blade is connected on the anode, negative electrode adopts stainless steel plate, the stainless steel plate area is 1: 1 with the blade area ratio, solution is heated to 40～60 ℃, handle and take out blade after 1～3 minute, rinse well in being not less than 60 ℃ hot water, compressed air blow drying gets final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991146131A CN1136336C (en) | 1999-01-12 | 1999-01-12 | Chemical removing technology for composite coating of aircraft engine steel blade before low temperature aluminizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991146131A CN1136336C (en) | 1999-01-12 | 1999-01-12 | Chemical removing technology for composite coating of aircraft engine steel blade before low temperature aluminizing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1227280A true CN1227280A (en) | 1999-09-01 |
| CN1136336C CN1136336C (en) | 2004-01-28 |
Family
ID=5277672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991146131A Expired - Fee Related CN1136336C (en) | 1999-01-12 | 1999-01-12 | Chemical removing technology for composite coating of aircraft engine steel blade before low temperature aluminizing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1136336C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932794A (en) * | 2008-02-14 | 2010-12-29 | 三菱重工业株式会社 | Method of regenerating gas turbine blade and gas turbine blade regenerating apparatus |
| CN102431269A (en) * | 2011-09-29 | 2012-05-02 | 上海联净环保科技有限公司 | Technology and device for processing film-coated iron |
| CN102766867A (en) * | 2012-08-15 | 2012-11-07 | 中国南方航空工业(集团)有限公司 | Method for removing NiAl/AlSi coatings |
| CN110230064A (en) * | 2019-05-09 | 2019-09-13 | 航天精工股份有限公司 | A kind of solution and method stripping molybdenum disulfide coating and aluminized coating |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10377968B2 (en) | 2017-06-12 | 2019-08-13 | General Electric Company | Cleaning compositions and methods for removing oxides from superalloy substrates |
-
1999
- 1999-01-12 CN CNB991146131A patent/CN1136336C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932794A (en) * | 2008-02-14 | 2010-12-29 | 三菱重工业株式会社 | Method of regenerating gas turbine blade and gas turbine blade regenerating apparatus |
| CN102431269A (en) * | 2011-09-29 | 2012-05-02 | 上海联净环保科技有限公司 | Technology and device for processing film-coated iron |
| CN102431269B (en) * | 2011-09-29 | 2014-07-23 | 上海联净电子科技有限公司 | Technology and device for processing film-coated iron |
| CN102766867A (en) * | 2012-08-15 | 2012-11-07 | 中国南方航空工业(集团)有限公司 | Method for removing NiAl/AlSi coatings |
| CN102766867B (en) * | 2012-08-15 | 2014-08-27 | 中国南方航空工业(集团)有限公司 | Method for removing NiAl/AlSi coatings |
| CN110230064A (en) * | 2019-05-09 | 2019-09-13 | 航天精工股份有限公司 | A kind of solution and method stripping molybdenum disulfide coating and aluminized coating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1136336C (en) | 2004-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108441918A (en) | A kind of aluminum alloy surface treatment process | |
| CN105525298B (en) | A method of removal titanium and its alloy surface oxide skin | |
| CN107937960A (en) | A kind of aluminium alloy anode oxide technique | |
| CN1136336C (en) | Chemical removing technology for composite coating of aircraft engine steel blade before low temperature aluminizing | |
| CN109628987A (en) | A kind of fastener barrel plating production technology | |
| KR20090007081A (en) | Conductivity anodizing method | |
| CN1858306A (en) | Process for cathode electrolytic deposition of rare-earth conversion film | |
| CN107675193A (en) | A kind of raw material of aluminum alloy preprocess method | |
| CN102337545A (en) | Rust remover for ultrasonically cleaning metal mould and preparation method thereof | |
| CN106521404A (en) | Process for manufacturing titanium anode by once oxidation | |
| CN108728864A (en) | A kind of electrode coating restorative procedure | |
| CN106835163B (en) | Cleaning process for Ni―Ti anode surface noble metal plated film | |
| CN1536060A (en) | Multifunctonal degreasing rust-removing cleaning agent and its preparaton method | |
| CN110106545B (en) | Nickel-titanium alloy electrochemical polishing solution, surface treatment method and left atrial appendage occluder | |
| JP2003321798A (en) | Method and apparatus for electrical treatment such as electroplating | |
| CN105239122A (en) | Pretreatment method for electroplating of carbon steel bolt | |
| CN1110580C (en) | Multiple low-temperature aluminizing technology for steel blade of aircraft engine | |
| CN109267142A (en) | A kind of PH stainless steel room temperature electrolytic pickling method | |
| CN107991160B (en) | Macroscopic inspection method for surface defects of iron-based high-temperature alloy disc | |
| CN107779884A (en) | A kind of cleaning method of crome metal piece | |
| JP5187500B2 (en) | Surface treatment method and surface treatment apparatus for workpiece | |
| CN108187994A (en) | A kind of preparation method for improving magnesium alloy anticorrosion stress-resistant performance epoxy coating | |
| CN113913916A (en) | Method for removing oxide skin on surface of titanium alloy | |
| CN111020463A (en) | Surface treatment method of magnesium and magnesium alloy based on gas-phase carbon dioxide environment | |
| CN106048622B (en) | A kind of metal surface multifunctional composite treating agent and preparation method thereof and application method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |