CN104372358A - Method for detecting aircraft aluminum alloy surface cleaning composition - Google Patents
Method for detecting aircraft aluminum alloy surface cleaning composition Download PDFInfo
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- CN104372358A CN104372358A CN201410605431.0A CN201410605431A CN104372358A CN 104372358 A CN104372358 A CN 104372358A CN 201410605431 A CN201410605431 A CN 201410605431A CN 104372358 A CN104372358 A CN 104372358A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
- C23G1/125—Light metals aluminium
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
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- 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
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Abstract
The invention provides a method for detecting applicability of an aircraft aluminum alloy surface cleaning composition. The method comprises the following steps: detecting the appearance; detecting the influence of the corrosion resistance of an aluminum alloy surface treatment technology; detecting intergranular corrosion; detecting the removal rate; detecting the descaling ability; and detecting the influence caused by aluminum ions. The detection method aims at ensuring that the adopted cleaning composition does not affect the aircraft safety through the detection, and simultaneously can meet the requirements of subsequent processes.
Description
Technical field
The present invention relates to the process of surface treatment of plane aluminium alloy.Particularly, the present invention relates to the detection method of the surface cleaning composition before for plane aluminium alloy surface treatment, to ensure the suitability of cleaning combination.
Background technology
Aircraft aluminium alloy used has to pass through surface before use and prepares, surface preparation procedures carries out suitable corrosion or conversion processing to aluminum alloy surface, then anodic oxidation or the chemical oxidation on surface is carried out, improve resistance to corrosion to reach and improve the object with coating binding force, therefore ensure that pre-treating technology formula is very important through reasonable, correct certification.Both at home and abroad sexavalent chrome heavily contaminated industry is carried out forbidding of increasingly stringent and limited.Although air system is special industry, it is first with safety performance, containing chromium surface process and pre-treating technology still in a large amount of employing.But this situation has had obvious change at present, Boeing has started in 2011 to notify that its supplier cancels the process of surface treatment containing chromium, and Airbus SAS also requires that its supplier started to prohibit the use containing chromium process in 2013.To have an immense impact on to relating to surface-treated technique thus, the certification especially in a large number containing chromium process formula will be the problem that first will solve.
Summary of the invention
In view of the uncertainty of the aircraft aluminum alloy surface cleaning combination suitability of a large amount of Dai Ge (not containing chromium), determine the suitability of described composition in the urgent need to a kind of detection method, namely ensure the security of aircraft and efficiency and Cost Problems simultaneously.
The present invention establishes the detection method being applicable to aircraft aluminum alloy surface treatment process cleaning combination for this reason.
The object of this invention is to provide a kind of detection method of aircraft corrosion of aluminium alloy cleaning combination, while guaranteeing aircraft safety, ensure the efficiency in producing and Cost Problems.
In the production of plane aluminium alloy component, all parts must carry out surface treatment to improve the corrosion resistance nature of aircraft, and must carry out surface cleaning before surface treatment, and surface cleaning determines surface-treated quality.
Conventional aluminum alloy surface cleaning is for containing chromic cleaning combination, and such composition can either ensure the corrosion resistance nature of sequent surface treatment process, can meet again the requirement of production efficiency simultaneously.But along with the raising day by day of environmental protection, emission request, novel surface cleaning composition is more and more developed, the detection of aluminum alloy surface cleaning combination becomes crucial thus.
The present invention, in order to address this problem, proposes the detection method of aircraft aluminum alloy surface cleaning combination, by multiple detecting step and requirement, guarantees reliability and the production efficiency of cleaning combination.
Therefore, one aspect of the present invention is to provide a kind of detection method of suitability of aircraft aluminum alloy surface cleaning combination, comprising:
Outward appearance detects, detect the impact of aluminum alloy surface treatment process corrosion resistance nature, intergranular corrosion detects, remove rate detection and descaling ability detects and affects detection by aluminum ion.
As defined herein, term " outward appearance detection " refers to by the condition of surface of visual means inspection through cleaning, continuous for determining whether surface can reach moisture film after cleaning.
According to of the present invention one preferred embodiment, outward appearance detects when comprising the minimum compound concentration 1-10 minute aluminium alloy test plate (panel) being placed in cleaning combination, and it is continuous that outward appearance can reach moisture film.
As defined herein, term " cleaning combination " refers to the solution cleaning removal aluminum alloy surface oxide compound or removal certain thickness aluminium alloy by corrosion, is generally dissolved in water by acidic substance and prepares.
As defined herein, the nominal minimum concentration of regulation when term " minimum compound concentration " refers to that cleaning combination to be tested cleans for aluminium alloy.
As defined herein, term " moisture film is continuous " refers at 38 DEG C (100 °F) below, and after cleaning water hydro-peening or rinsing, hydrophobic surface can maintain continuous moisture film and not break at least 30 seconds.
As defined herein, term " detects the impact of aluminum alloy surface treatment process corrosion resistance nature " and refers to the aluminium alloy plate that cleans through cleaning combination after aluminum alloy chemically oxide treatment, be positioned in certain corrosive environment, test its corrosion resistance nature and whether can reach standard.
Described corrosive environment nominal temperature 35 DEG C, etching condition is formed by the sodium chloride solution mist of sedimentation 5 ± 1% weight percent, name salt fog sinkability is: the horizontal collecting area of every 80 square centimeters (12.4 square inches), should be able to ensure to collect 1.0-2.0 milliliter solution with average operating time at least 16 hours.
Corrosion-resistant standard is: after completing test determination hour, the visual corrective lens (eye protection) inspection of with the naked eye or not amplifying: on every 580 sq test pieces (3), the number of isolated corrosion pit or corrosion pit should more than 9, and arbitrary diameter is all not more than 0.8mm (0.032in).In any one test piece, the number of isolated corrosion pit or corrosion pit should more than 5, and arbitrary diameter is all not more than 0.8mm (0.032in).
According to of the present invention one preferred embodiment, detection is affected on aluminum alloy surface treatment process corrosion resistance nature and comprises that aluminium alloy test plate (panel) to be placed in cleaning combination continuous to reaching moisture film, and test plate (panel) is pressed chromate conversion coating process, then carry out salt-fog test according to ASTM B117, on monolithic test plate (panel), hot spot quantity is no more than 3.
As defined herein, term " chromate conversion coating " refers to and chromic salt and phosphoric acid is prepared into certain density solution by the method for dissolving, by the strong oxidizing property of chromic salt, form the oxide film of one deck densification in surface of aluminum plate, this oxide film has certain Corrosion Protection.
The concrete steps of chromate conversion coating process:
(1) aluminium alloy test plate (panel) is cleaned up to surperficial moisture film continuous;
(2) aluminium alloy test plate (panel) is put into chromate conversion coating solution 1-5 minute, make aluminium alloy test plate (panel) surface oxidation, generate the oxide film that one deck is yellow or colored, this rete is chromate conversion coating.
The concrete steps of ASTM B117 salt-fog test:
(1) according to the requirement adjustment salt fog cabinet test parameter of ASTM B117 to salt-fog test equipment, following content is mainly comprised:
The sodium-chlor of 5 ± 1% weight percents being dissolved in 95 parts meets in the distilled water of IV type water quality requirement in D 1193, obtained salts solution (restriction of present method to chlorine and sodium can be ignored).
The temperature of temperature-salt fog cabinet salt fog exposure zone should remain on 35+1.1-1.7 DEG C.
The control criterion of atomization and mist amount-spray amount is: the horizontal collecting area of every 80 square centimeters (12.4 square inches), should be able to ensure to collect 1.0-2.0 ml soln with average operating time at least 16 hours.
The injection direction of nozzle or baffling direction should be able to ensure that salt fog can not direct shock test sample.
(2) test plate (panel) through chromate conversion coating process is put into salt-spray cabinet, the time is 168 hours.
(3) after arriving 168 hours, test plate (panel) is taken out, observe test plate (panel) surface.
As defined herein, term " intergranular corrosion detection " refers to metallographic method test aluminium alloy intergranular corrosion and spot corrosion.Testing method is as follows:
(1) according to getting cross section sample and inlaying shown in accompanying drawing 1.
Follow these steps on crystal grain end and grain boundary, check A face with 100 times or larger multiple the spot corrosion of crystal grain end and intergranular corrosion:
1. scrutinize the whole interface in A face and measure pit the darkest within the scope of this.
2. choose on microscope or display screen for assessment of spot corrosion region.
3. measure intergranular corrosion and the spot corrosion of crystal grain end with the applicable requirement shown in accompanying drawing 2.In accompanying drawing 2, D is the degree of depth of crystal grain end spot corrosion.
Preferred embodiment during intergranular corrosion detects, adopt when detecting with the following method according to one of the present invention, occur without intergranular corrosion, while crystal grain end spot corrosion be no more than 25 microns:
A) get the 7075-T76511 aluminium alloy that a piece is not less than 50mm × 50mm × 3mm, by the method for vertical grain direction cross section by polishing, polishing, make the surfaceness in this cross section be better than 0.8 μm;
B) test plate (panel) is directly put into cleaning combination 30 minutes;
C) test plate (panel) is inlayed, check that the darkest pit in described cross section is as crystal grain end spot corrosion virtual value;
D) intergranular corrosion is checked.
As defined herein, term " spot corrosion of crystal grain end " refers to the hole shape defect that the form ratio observed under metaloscope is less than 6, generally represents by the degree of depth of the defect satisfied condition in certain limit.
As defined herein, term " removal rate detection " refers to that erosion rate is defined as the degree of depth of per minute erosion removal, with milli m/h/face represents.Erosion rate is determined by following method by suitability:
The strip test plate (panel) of a preparation 100mm × 100mm, this test plate (panel) should have enough thickness.Vertically test plate (panel) is immersed certain hour in chemical milling solution.Thickness loss divided by the time, then is exactly erosion rate divided by 2.Remove speed and be not less than 5 micro-ms/h.
According to of the present invention one preferred embodiment, remove rate detection comprise by aluminium alloy to be cleaned immerse cleaning combination minimum compound concentration in, remove 5 μm, the time used is no more than 60min.
As defined herein, term " detection of descaling ability " refers to that cleaning combination measures the cleansing power of aluminium alloy under the minimum concentration of regulation, reach the required standards continuously to reach moisture film as descaling ability.
According to of the present invention one preferred embodiment, descaling ability detects and comprises the sample will detected through intergranular corrosion, and put into the minimum compound concentration solution preferably 20 minutes of cleaning combination, it is continuous that outward appearance can reach moisture film.
As defined herein, term " affects detection by aluminum ion " and refers to that manually preparing cleaning combination makes aluminium composition wherein be 10g/L, under detecting cleaning combination this kind of state, outward appearance detects, whether can reach requirement to the impact of aluminum alloy surface treatment process corrosion resistance nature, intergranular corrosion, removal speed and descaling ability.In other words, when referring to that in cleaning combination, aluminium composition reaches 10g/L, whether cleaning combination still has normal cleansing power and effect.
Preferred embodiment affect in detection by aluminium composition according to one of the present invention, the aluminum ion contained in the minimum compound concentration solution of cleaning combination is (with Al
3+meter) concentration is when being 10g/L, re-starts that outward appearance detects, detects the impact of aluminum alloy surface treatment process corrosion resistance nature, intergranular corrosion detects, remove rate detection and descaling ability detects.
According to of the present invention one preferred embodiment, described cleaning combination can be selected from trivalent chromium solutions or mixed acid solution.Described trivalent chromium solutions can be mixed with by trivalent chromium salt solution, nitric acid and hydrofluoric acid, wherein trivalent chromium concentration scope: 19-26g/L is (with Cr
3+meter), concentration of nitric acid scope: 40-90g/L is (with HNO
3meter), and hydrofluoric acid concentration scope: 0.6-3.1g/L (in HF); Described mixed acid solution can be the mixing solutions of chromic acid and sulfuric acid, wherein chromic acid concentration range: 45-55g/L is (with CrO
3meter), sulfuric acid concentration ranges: 250-300g/L is (with H
2sO
4meter).
Through the inventive method detect qualified cleaning combination should make the outward appearance of aircraft aluminum alloy surface can reach moisture film continuously, after chromic salt process anti-corrosion test be not less than ASTM B 117 salt-fog test 168 hours, intergranular corrosion lower than 5 microns, the corrosion of crystal grain end not higher than 25 microns, remove speed be not less than 5 micro-ms/h, can remove aluminium alloy through chromic salt process surface film oxide, allow the concentration of aluminium composition to reach 10g/L.
The detection method of aircraft corrosion of aluminium alloy cleaning combination that the present invention sets up can ensure efficiency in production and Cost Problems while guaranteeing aircraft safety.
Accompanying drawing explanation
Fig. 1 is the sample preparation figure of the corrosion of crystal grain end and intercrystalline corrosion samples.Method for making sample is as follows:
A) get the 7075-T76511 aluminium alloy that a piece is not less than 50mm × 50mm × 3mm, by the method for vertical grain direction cross section by polishing, polishing, make the surfaceness in this cross section be better than 0.8 μm;
B) test plate (panel) is directly put into cleaning combination 30 minutes;
C) test plate (panel) is inlayed.
Fig. 2 is the schematic diagram checking end crystal grain spot corrosion and intergranular corrosion, and wherein W is the width of cheating shape corrosion under metaloscope, and D is the degree of depth of hole shape corrosion.
Fig. 3 is step 1 in embodiment 1) in adopt chemical conversion membrane process after descaling: cleaning combination A (left side), cleaning combination B (right side).
Fig. 4 is step 3 in embodiment 1) middle crystal grain end spot corrosion: cleaning combination A (right side), cleaning combination B (left side).
Embodiment
Embodiment 1 is for the trace routine of first company cleaning combination A (mixing solutions of 24.3g/L trivalent chromium salt solution, 45.5g/L nitric acid and 1.6g/L hydrofluoric acid) and company B cleaning combination B (mixing solutions of 47.4g/L chromic acid and 286.5g/L sulfuric acid): account for volume ratio 19% deionized water preparation cleaning combination solution A by composition A; Volume ratio 22% deionized water preparation cleaning combination B solution is accounted for by composition B.
1) outward appearance detects
The descaling solution of preparation cleaning combination A and cleaning combination B, non-for 2024-T3 alclad test plate (panel) is put into solution difference descaling 5 minutes, 10 minutes, 30 minutes, 60 minutes, test plate (panel) is taken out, rinses with water, checking moisture film, all finds that surperficial moisture film can maintain more than 30 seconds continuously.
2) corrosion resistance nature impact detects
The solution non-for 2024-T3 alclad test plate (panel) being put into respectively cleaning combination A and cleaning combination B distinguishes descaling 20 minutes, then chromate conversion coating processing, then requires to perform salt-fog test 168 h run according to ASTM B117.As shown in Figure 3, test rear surface is still iris to test-results, and surface, without macroscopic hot spot, shows the cleaning solution adopting this technique, do not have a significant effect to the Corrosion Protection of conversion film itself.
3) intergranular corrosion detects
Get the 7075-T6511 aluminium alloy that a piece is not less than 25mm × 25mm × 3mm or thicker, as shown in Figure 1, by the method for vertical grain direction section A by polishing, polishing, make the surfaceness in A face be better than 0.8 μm.
Test plate (panel) is directly put into descaling solution, milling timi requirement 30 minutes.
Test plate (panel) at least being inlayed after 5mm by cutting shown in Fig. 1, checking that the darkest pit (Fig. 2) in A face is crystal grain end spot corrosion virtual value.
Intergranular corrosion is checked by shown in Fig. 2.
As shown in Figure 4, it is 20 microns that two intergranular corrosion are respectively cleaning combination A to experimental result, and cleaning combination B is 10 microns, and two kinds of formulas do not find intergranular corrosion substantially.Wherein only find that there is the spot corrosion of crystal grain end in position as shown in the figure in composition B intergranular corrosion, other position does not find the spot corrosion of crystal grain end.
4) rate detection is removed
A) the erosion rate research at cleaning combination B 50 DEG C.
Test plate (panel) is put into successively the solution that 2L prepares, clean about 15 minutes, obtain data as shown in table 1 below.As shown in Table 1, erosion rate change is little, and basic controlling is at 5-7 micron/face/hours.
The erosion rate of cleaning combination B during table 1:50 DEG C
B) the erosion rate research under cleaning combination A room temperature.
Test plate (panel) is put into successively the solution that 2L prepares, clean about 15 minutes, obtain data as shown in the table.From following table 2, erosion rate change is little, and basic controlling is at 6-12 micron/face/hours.
Table 2: the erosion rate of cleaning combination A under room temperature
5) detection is affected by aluminum ion
The descaling solution of preparation cleaning combination A and cleaning combination B, dissolves non-for 2024-T3 alclad test plate (panel) and enters 10g/1 in solution, then test plate (panel) is put into solution and clean.Can find, through the surface of cleaning, still can reach moisture film continuous.
6) descaling ability detects
The descaling solution of preparation cleaning combination A and cleaning combination B, will immerse solution through the non-alclad test plate (panel) of solution heat treatment condition (environment that temperature the is greater than 493 DEG C) 2024-T3 of more than 1 hour.Can find, through the surface of cleaning, still can reach moisture film continuous.
It is qualified that first company cleaning combination A and company B cleaning combination B confirms after detection method detects.
Salt-fog resistant test (ASTM B117) 168 hours is the minimum requirements in the process of civilian aircraft alclad alloy surface, as can not be met the salt-fog test of 168 hours through the alloy of peroxychromate process, can affect the work-ing life of part.
The surface cleaning effect of crystal grain end infection part.The composition that crystal grain end corrodes and corrosion among crystalline grains is poor, cleaning rear surface effect is poor, affects surfaceness etc.
Erosion rate: the common conversion film time is 2-3 minute, when adopting surface cleaning, general surface requirements removes 2-3 micron, if cleaning formulation erosion rate can not reach 5 micro-ms/h/face, then can reduce production efficiency greatly.
Affect by aluminum ion: if solution is very sensitive to aluminium composition, then, after producing very short time, just need tank liquor to scrap, again prepare, extreme influence production efficiency, economic benefit is also by very large impact simultaneously.
Claims (10)
1. an aircraft detection method for the suitability of aluminum alloy surface cleaning combination, comprising:
Outward appearance detects, detect the impact of aluminum alloy surface treatment process corrosion resistance nature, intergranular corrosion detects, remove rate detection and descaling ability detects and affects detection by aluminum ion.
2. detection method as claimed in claim 1, is characterized in that, when outward appearance detects and comprises the minimum compound concentration 1-10 minute aluminium alloy test plate (panel) being placed in cleaning combination, it is continuous that outward appearance can reach moisture film.
3. detection method as claimed in claim 1, is characterized in that,
Detection is affected on aluminum alloy surface treatment process corrosion resistance nature and comprises that aluminium alloy test plate (panel) to be placed in cleaning combination continuous to reaching moisture film, and test plate (panel) is pressed chromate conversion coating process, then carry out salt-fog test according to ASTM B117, on monolithic test plate (panel), hot spot quantity is no more than 3.
4. detection method as claimed in claim 1, is characterized in that, during intergranular corrosion detects, adopts when detecting with the following method, occurs without intergranular corrosion, while crystal grain end spot corrosion be no more than 25 microns:
A) get the 7075-T76511 aluminium alloy that a piece is not less than 50mm × 50mm × 3mm, by the method for vertical grain direction cross section by polishing, polishing, make the surfaceness in this cross section be better than 0.8 μm;
B) test plate (panel) is directly put into cleaning combination 30 minutes;
C) test plate (panel) is inlayed, check that the darkest pit in described cross section is as crystal grain end spot corrosion virtual value;
D) intergranular corrosion is checked.
5. detection method as claimed in claim 1, is characterized in that, remove rate detection and comprise in the minimum compound concentration of aluminium alloy to be cleaned immersion cleaning combination, remove 5 μm, the time used is no more than 60min.
6. detection method as claimed in claim 1, is characterized in that, descaling ability detects and comprises the sample will detected through intergranular corrosion, and put into the minimum compound concentration solution of cleaning combination, it is continuous that outward appearance can reach moisture film.
7. detection method as claimed in claim 1, is characterized in that,
Affect in detection by aluminium composition, the aluminum ion contained in the minimum compound concentration solution of cleaning combination is (with Al
3+meter) concentration is when being 10g/L, re-starts that outward appearance detects, detects the impact of aluminum alloy surface treatment process corrosion resistance nature, intergranular corrosion detects, remove rate detection and descaling ability detects.
8. detection method as claimed in claim 1, it is characterized in that, described cleaning combination is selected from trivalent chromium mixing solutions or mixed acid solution.
9. detection method as claimed in claim 1, it is characterized in that, described trivalent chromium solutions is mixed with by trivalent chromium salt solution, nitric acid and hydrofluoric acid, wherein trivalent chromium concentration scope: 19-26g/L is (with Cr
3+meter), concentration of nitric acid scope: 40-90g/L is (with HNO
3meter), and hydrofluoric acid concentration scope: 0.6-3.1g/L (in HF).
10. detection method as claimed in claim 1, it is characterized in that, described mixed acid solution is the mixing solutions of chromic acid and sulfuric acid, wherein chromic acid concentration range: 45-55g/L is (with CrO
3meter), sulfuric acid concentration ranges: 250-300g/L is (with H
2sO
4meter).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410605431.0A CN104372358A (en) | 2014-10-31 | 2014-10-31 | Method for detecting aircraft aluminum alloy surface cleaning composition |
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| CN201410605431.0A CN104372358A (en) | 2014-10-31 | 2014-10-31 | Method for detecting aircraft aluminum alloy surface cleaning composition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655381A (en) * | 2019-01-04 | 2019-04-19 | 江苏理工学院 | A kind of measurement method of high temperature aluminum/aluminium alloy drop angle of wetting |
| CN110629212A (en) * | 2018-06-25 | 2019-12-31 | 中国航发商用航空发动机有限责任公司 | Surface treatment liquid for aviation aluminum alloy and use method thereof |
-
2014
- 2014-10-31 CN CN201410605431.0A patent/CN104372358A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 李斌 等: ""AHC-1及AHC-5飞机表面水基清洗剂应用研究"", 《清洗世界》 * |
| 陈跃良 等: ""海军某型飞机表面清洗技术"", 《清洗世界》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629212A (en) * | 2018-06-25 | 2019-12-31 | 中国航发商用航空发动机有限责任公司 | Surface treatment liquid for aviation aluminum alloy and use method thereof |
| CN109655381A (en) * | 2019-01-04 | 2019-04-19 | 江苏理工学院 | A kind of measurement method of high temperature aluminum/aluminium alloy drop angle of wetting |
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Application publication date: 20150225 |