CN109207972A - A kind of preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating - Google Patents
A kind of preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating Download PDFInfo
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- CN109207972A CN109207972A CN201811419120.XA CN201811419120A CN109207972A CN 109207972 A CN109207972 A CN 109207972A CN 201811419120 A CN201811419120 A CN 201811419120A CN 109207972 A CN109207972 A CN 109207972A
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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
- C23C22/07—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 phosphates
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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
- C23C22/36—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 containing also phosphates
- C23C22/361—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 containing also phosphates containing titanium, zirconium or hafnium compounds
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Abstract
The invention discloses a kind of preparation methods of aluminum alloy surface titanium zirconium cerium chemical composition coating, comprising: aluminium alloy to be processed is placed in conversion fluid, carries out conversion processing, wherein includes calgon and six nitric hydrate ceriums in conversion fluid；The present invention has good environmentally protective value, and the content of raw material used is small, and economic cost is low, and chemical transforming process is simple to operation, and film forming speed is fast, and corrosion resistance is preferable.
Description
Technical field
The present invention relates to aluminum alloy surface process fields.It is more particularly related to a kind of aluminum alloy surface Chrome-free
Chemical conversion technology of preparing.
Background technique
Aluminium and its alloy have the characteristics such as high specific strength, excellent ductility, high-termal conductivity, in aerospace, Building wood
The industrial applications such as material and communications and transportation are extensive.Under weather complicated and changeable or the marine environment of harshness, aluminium alloy itself it is resistance to
Erosion situation makes people worried, this seriously constrains the application range of its product.By adding Metal Substrate in matrix and top coat paint
The mode of conversion coating, the antiseptic property both enabled aluminum alloy to have obtained further raising or have strengthened to coating adhesive ability.Base
There is good corrosion barrier and self-healing ability in chromate chemical conversion film, be widely used in all kinds of Al-alloy products
In.However due to Cr VI (Cr6+) high toxicity and carcinogenicity, the use of chromate conversion coatings it is constantly limited.It is wide in recent years
Big researcher has carried out various Chrome-free chemistry transformation technology researchs, and titanium zirconium (Ti-Zr) base conversion film is considered as chromate
The most promising substitute of conversion coating.Ti-Zr base conversion film corrosion resisting property is poor from the point of view of usually, needs to develop a kind of corrosion resistance
Good aluminium alloy titanium zirconium chemical composition coating.
Summary of the invention
In order to achieve the goal above, the present invention provides a kind of preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating,
Include:
Aluminium alloy to be processed is placed in conversion fluid, carry out conversion processing, wherein in conversion fluid comprising calgon with
And six nitric hydrate cerium.
Preferably, the preparation method of the aluminum alloy surface titanium zirconium cerium chemical composition coating is also wrapped in above-mentioned conversion fluid
Containing H2TiF6And H2ZrF6。
Preferably, the preparation method of the aluminum alloy surface titanium zirconium cerium chemical composition coating, in above-mentioned conversion fluid,
H2TiF6Concentration 0.8-3.2mlL-1, H2ZrF6Concentration 0.2-1.6mlL-1。
Preferably, the preparation method of the aluminum alloy surface titanium zirconium cerium chemical composition coating, in above-mentioned conversion fluid, six partially
Phosphoric acid na concn 0.1-0.5gL-1。
Preferably, the preparation method of the aluminum alloy surface titanium zirconium cerium chemical composition coating, in above-mentioned conversion fluid, six water
Close nitric acid cerium concentration 0.1-0.2gL-1。
Preferably, the preparation method of the aluminum alloy surface titanium zirconium cerium chemical composition coating, above-mentioned conversion processing is in temperature
90-150s is carried out at 25-35 DEG C of degree.
Preferably, the preparation method of the aluminum alloy surface titanium zirconium cerium chemical composition coating, the pH of above-mentioned conversion fluid are
3.5-4.5。
Preferably, the preparation method of the aluminum alloy surface titanium zirconium cerium chemical composition coating, in above-mentioned conversion fluid, six partially
Phosphoric acid na concn 0.5gL-1。
Preferably, the preparation method of the aluminum alloy surface titanium zirconium cerium chemical composition coating, in above-mentioned conversion fluid, six water
Close nitric acid cerium concentration 0.1gL-1。
Preferably, the preparation method of the aluminum alloy surface titanium zirconium cerium chemical composition coating, in above-mentioned conversion fluid,
H2TiF6Concentration is 2mlL-1, H2ZrF6Concentration is 1mlL-1。
The present invention is include at least the following beneficial effects: the present invention has good environmentally protective value, the raw material used
Content is small, and economic cost is low, and chemical transforming process is simple to operation, and film forming speed is fast, and corrosion resistance is preferable.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is embodiment 8 (Ti-Zr-Ce), comparative example (Ti-Zr) and blank print are (different in the case of tri- kinds of naked AA6061
The Tafel curve of conversion film；
Fig. 2 is embodiment 8 (Ti-Zr-Ce), comparative example (Ti-Zr) and blank print are (different in the case of tri- kinds of naked AA6061
The ac impedance spectroscopy of the Tafel curve of conversion film；
Fig. 3 is (a) 0s, (b) 90s, (c) 150s under film formation times different in embodiment 4, (d) different conversion films under 200s
Scanning electron microscope morphology characterization.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
One, test operation
AA6061 template is cut into the print of 60mm x 30mm x 3mm, is handled by following process: distillation washing
→ pre-treatment → distillation washing → chemical conversion → distillation washing → oven drying → naturally dry, test reagent are analysis
Pure, solution is configured by distilled water.
Specifically include following operation:
1.1 pre-treatment
In order to facilitate Aluminum alloy surface treatment production line operation, preceding place is carried out using acid degreasing comprehensive processing technique
Reason.Specific ingredient and condition are as follows: (raw material is purchased from the limited public affairs of Wuhan material protection institute to percent by volume 3%-5%ZHM-1026
Department), control pH is 0.8-1.1, handles time 5-8min.
1.2 chemical conversion
Aluminium alloy print is put into chemical conversion solution, dipping takes out after a certain period of time, obtains chemical composition coating.Technique is matched
Expect base condition: H2TiF60.8-3.2ml·L-1, H2ZrF60.2-1.6ml·L-1, calgon 0.1-0.5gL-1, six water
Close cerous nitrate 0.1-0.2gL-1, 25-35 DEG C of reaction temperature, reaction time 90-150s, pH value of solution 3.5-4.5.
Two, performance test
The experiment of 2.1 copper sulphate drops
For the corrosion resisting property for quickly detecting aluminum alloy surface conversion film, detected referring to the preparation of GB6807-86 phosphating coat standard
Solution.At room temperature, detection solution is dripped in film surface, while starts stopwatch, observing drop from sky blue becomes pink
Time, the as resistance to drop time of film layer.
2.2 electro-chemical test
Electro-chemical test is carried out using the CHI660D electrochemical workstation of Shanghai Chen Hua company, test medium is that NaCl is molten
Liquid (wt%) 3.5%, sample carry out Tafel curve (scanning speed 0.01Vs after reaching stable in NaCl solution-1), hand over
Flow impedance composes the scanning of (EIS).When measuring EIS, frequency test range is 10-1-105Hz, amplitude are the simple alternating current of 0.005V
Voltage, and measured under its corrosion potential.After measurement, according to EIS spectrum data, carried out with Zsimpwin software
Fitting, establishes reasonable equivalent-circuit model, obtains specific fitting data.
2.3 scanning electron microscope (SEM) morphology characterization
It is multiple using Sigma300 scanning electron microscope (SEM) the observation differential responses time chemistry of German ZEISS company
The surface topography of film is closed, and is based on power spectrum (EDS) analyzing film layer chemical composition.
Three, embodiment
Following all examples is all made of above-mentioned transformation processing method；
Comparative example
H2TiF6Concentration is 3.2mlL-1, H2ZrF6Concentration is 0.8mlL-1；PH 4.0,25 DEG C of reaction temperature, when reaction
Between 120s, 60 DEG C of drying temperature, drying time 20min；Only containing H2TiF6、H2ZrF6With turning for pH adjusting agent (ammonium hydroxide)
Change in liquid and chemical conversion is carried out to the aluminium alloy print after pre-treatment.Ti-Zr conversion film layer the corrosion resisting property drop time be
69s。
Embodiment 1 (six nitric hydrate cerium concentrations are different)
In embodiment 1, pH 4.0,25 DEG C of reaction temperature, reaction time 120s, 60 DEG C of drying temperature, drying time is
20min；
And in comparative example 1 conversion fluid specific ingredient it is as follows:
Conversion fluid 1
H2TiF6Concentration is 3.2mlL-1；
H2ZrF6Concentration is 0.8mlL-1；
Calgon 0.5gL-1；
Conversion fluid 2
H2TiF6Concentration is 3.2mlL-1；
H2ZrF6Concentration is 0.8mlL-1；
Calgon 0.5gL-1；
Six nitric hydrate cerium 0.04/gL-1
Conversion fluid 3
H2TiF6Concentration is 3.2mlL-1；
H2ZrF6Concentration is 0.8mlL-1；
Calgon 0.5gL-1；
Six nitric hydrate cerium 0.1/gL-1
Conversion fluid 4
H2TiF6Concentration is 3.2mlL-1；
H2ZrF6Concentration is 0.8mlL-1；
Calgon 0.5gL-1；
Six nitric hydrate cerium 0.16/gL-1
Conversion fluid 5
H2TiF6Concentration is 3.2mlL-1；
H2ZrF6Concentration is 0.8mlL-1；
Calgon 0.5gL-1；
Six nitric hydrate cerium 0.2/gL-1
The drop time of the conversion film of the six nitric hydrate ceriums processing of various concentration and film layer resistance R in 1 embodiment 1 of tablect
If table 1 can obtain, it is less than 0.16gL in six nitric hydrate cerium concentrations-1When, the corrosion resisting property of aluminium alloy and cerium salt
Concentration is positively correlated；When concentration is greater than 0.16gL-1When, film layer resistance RctSharply decline.It is observed during the experiment when six
Nitric hydrate cerium concentration is greater than 0.2gL-1When solution start to occur it is muddy.
Comparative example 2 (hexa metaphosphoric acid na concn is different)
In embodiment 2, pH 4.0,25 DEG C of reaction temperature, reaction time 120s, 60 DEG C of drying temperature, drying time is
20min；
And in comparative example 2 conversion fluid specific ingredient it is as follows:
Conversion fluid 11
H2TiF6Concentration is 3.2mlL-1；
H2ZrF6Concentration is 0.8mlL-1；
Six nitric hydrate cerium 0.1/gL-1；
Conversion fluid 12
H2TiF6Concentration is 3.2mlL-1；
H2ZrF6Concentration is 0.8mlL-1；
Six nitric hydrate cerium 0.1/gL-1；
Calgon 0.05gL-1；
Conversion fluid 13
H2TiF6Concentration is 3.2mlL-1；
H2ZrF6Concentration is 0.8mlL-1；
Six nitric hydrate cerium 0.1/gL-1；
Calgon 0.1gL-1；
Conversion fluid 14
H2TiF6Concentration is 3.2mlL-1；
H2ZrF6Concentration is 0.8mlL-1；
Six nitric hydrate cerium 0.1/gL-1；
Calgon 0.3gL-1；
Conversion fluid 15
H2TiF6Concentration is 3.2mlL-1；
H2ZrF6Concentration is 0.8mlL-1；
Six nitric hydrate cerium 0.1/gL-1；
Calgon 0.5gL-1；
The drop time of the conversion film of the calgon processing of various concentration and film layer resistance R in 2 embodiment 2 of tablect
It can be obtained by table 2, be 0-0.3gL in hexa metaphosphoric acid na concn-1When, have to the corrosion resisting property of conversion film and gradually mentions
It rises.Afterwards as the concentration of calgon increases, corrosion resisting property is declined.And it is found during the experiment with six inclined phosphorus
The muddy degree of the increase of the concentration of sour sodium, conversion fluid declines to a great extent, and is 0.1gL in concentration-1When, solution is clarified (for 24 hours substantially
Stand), calgon optimum response concentration is in 0.1-0.5gL-1。
Embodiment 3
In technological parameter are as follows: pH 4.0,25 DEG C of reaction temperature, reaction time 120s, 60 DEG C of drying temperature, drying time is
20min carries out the experiment of four factors, three horizontal quadrature to 4 kinds of components of conversion fluid.Horizontal factor table such as table 3, orthogonal result table is such as
Table 4.Orthogonal result treatment such as table 5.
3 level of table and factor
Table 4 just gives result
5 data processed result of table
| T1 | 390 | 335 | 300 | 392 | 991(T) |
| T2 | 345 | 322 | 309 | 291 | |
| T3 | 256 | 334 | 382 | 308 | |
| X1 | 130 | 111.7 | 100 | 130.7 | |
| X2 | 115 | 107.3 | 103 | 99 | |
| X3 | 85.3 | 111.3 | 127.3 | 102.7 | |
| It is very poor | 44.7 | 4.4 | 27.3 | 31.7 |
According to influence power of each component in solution to the resistance to drop experimental period of copper sulphate, sequence are as follows: H2TiF6> six
Nitric hydrate cerium > calgon > H2ZrF6.The optimum proportioning of fast filming is determined according to orthogonal experiment are as follows:
H2TiF62ml·L-1, H2ZrF61ml·L-1, calgon 0.5gL-1, six nitric hydrate cerium 0.1gL-1。
Embodiment 4
In embodiment 4, conversion fluid is H2TiF6 2ml·L-1, H2ZrF6 1ml·L-1, calgon 0.5gL-1,
Six nitric hydrate cerium 0.1gL-1；Reaction temperature is 25 DEG C, pH 4.0；
The drop time of the conversion film of 6 differential responses time-triggered protocol of table and film layer resistance Rct
For table 6 it is found that 90s, film layer are in text message before the reaction time, membranous layer corrosion resistance can progressively reach the larger value,
Afterwards in 120-300s, corrosion resisting property has certain reduction.The appropriate reaction time is 90-150s.
Fig. 3 is (a) 0s, (b) 90s, (c) 150s under different film formation times, (d) SEM figure of the 200s conversion film at 1500x
Picture, from Fig. 3-a as can be seen that aluminum alloy surface Jing Guo pre-treatment there are a large amount of holes and crackles, with the reaction time
Increase, the aluminum alloy surface crackle hole that fades away gradually is closed.With the increase (Fig. 3-b) in reaction time, crackle does not have substantially
It changes, surface is more uniform, which gradually forms in flat surface, and the corrosion resisting property of conversion film is at any time at this time
Increase and increases.Crackle fades away in Fig. 3-c, and hole still remains, and illustrates that film layer has gradually completely covered crackle, resistance to point
The drop time reaches high value.Fig. 3-d, crackle disappear, and hole is gradually closed, but the film layer that acutely generates of partial region reaction compared with
Thickness, non-uniform film layer cause its resistance to drop time to reduce.
Embodiment 5
In embodiment 5, conversion fluid is H2TiF6(50mass%) 2mlL-1, H2ZrF6(40mass%) 1mlL-1, six
Sodium metaphosphate 0.5gL-1, six nitric hydrate cerium 0.1gL-1；Reaction time 120s, pH 4.0；
The drop time of the conversion film of 7 differential responses Temperature Treatment of table and film layer resistance Rct
As shown in Table 7, influence peak value of the reaction temperature to conversion film illustrates that preferable range of reaction temperature is at 30 DEG C
25-35℃。
Embodiment 6
In embodiment 6, conversion fluid is H2TiF6 2ml·L-1, H2ZrF6 1ml·L-1, calgon 0.5gL-1,
Six nitric hydrate cerium 0.1gL-1；Reaction temperature is 25 DEG C, reaction time 120s.
The drop time of the conversion film of the different pH value processing of table 8 and film layer resistance Rct
As shown in Table 8, in pH value 3.0, membranous layer corrosion resistance can be poor, gradually increases when to pH value 4.0 and reaches maximum value,
Decline again with the increase corrosion resisting property of solution ph.Ti when solution ph is higher, in solution4+And Zr4+It is heavy in metal surface
Product is more easier, but conversion fluid becomes unstable, cannot form good conversion film, in experiment when pH value is greater than 4.6 solution
In it can be observed that obvious turbid phenomenon.
Embodiment 7
In embodiment 7, reaction condition are as follows: H2TiF6 2ml·L-1, H2ZrF6 1ml·L-1, calgon 0.5gL-1, six nitric hydrate cerium 0.1gL-1, Three factors-levels orthogonal experiment is carried out to the process portion of conversion fluid.Horizontal factor table
Such as 9, orthogonal result table such as table 10, orthogonal result treatment such as table 11.
9 level of table and factor
10 orthogonal experiment of table and result
The orthogonal result treatment of table 11
The range analysis of 11 calculation processing Orthogonal experiment results of table.When being tested with parameter each in solution to the resistance to drop of copper sulphate
Between influence power according to, sequence are as follows: the reaction temperature > pH value > reaction time.Fast filming is determined according to orthogonal experiment
Optimised process are as follows: 30 DEG C of reaction temperature, reaction time 150s, pH3.5.
Embodiment 8 (most preferred embodiment)
30 DEG C of reaction temperature, reaction time 150s, pH3.5；
H2TiF6 2ml·L-1,
H2ZrF6 1ml·L-1,
Calgon 0.5gL-1,
Six nitric hydrate cerium 0.1gL-1；
By embodiment 8 (Ti-Zr-Ce), comparative example (Ti-Zr) and blank print (naked AA6061), come with electro-chemical test
Evaluate the anti-corrosion performance of different prints；
The polarization parameter of 12 aluminium alloy print of table and conversion film
| Ecorr/V | Icorr/μA·cm-2 | Rct/Ω | |
| Blank | -7.989 | 5.869 | 3157 |
| Ti-Zr | -8.348 | 2.297 | 9457 |
| Ti-Zr-Ce | -8.693 | 0.1148 | 68140 |
From table 12 and Fig. 1, Fig. 2 it is found that the corrosion electric current density I of Ti-Zr-Ce printcorrFor 0.1148 μ Acm-2, than
Blank print and small 1 order of magnitude of Ti-Zr print.Corrosion current is one of the major parameter to metal corrosion resistance energy, corrosion electricity
Flow smaller, material anti-corrosion performance is better.Meanwhile corrosion potential (the E of Ti-Zr-Ce printcorr) -8.693V is also relatively minimum, it says
The passivating film corrosion resistance of bright process conditions preparation is preferable.And film layer resistance is promoted from 3157 Ω of blank print to 68140
The corrosion resistance that Ω furthers elucidate Ti-Zr-Ce conversion film significantly improves.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating characterized by comprising
Aluminium alloy to be processed is placed in conversion fluid, conversion processing is carried out, wherein includes calgon and six in conversion fluid
Nitric hydrate cerium.
2. the preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating as described in claim 1, which is characterized in that above-mentioned turn
Changing also includes H in liquid2TiF6And H2ZrF6。
3. the preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating as claimed in claim 2, which is characterized in that above-mentioned turn
Change in liquid, H2TiF6Concentration 0.8-3.2mlL-1, H2ZrF6Concentration 0.2-1.6mlL-1。
4. the preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating as described in claim 1, which is characterized in that above-mentioned turn
Change in liquid, hexa metaphosphoric acid na concn 0.1-0.5gL-1。
5. the preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating as described in claim 1, which is characterized in that above-mentioned turn
Change in liquid, six nitric hydrate cerium concentration 0.1-0.2gL-1。
6. the preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating as claimed in claim 4, which is characterized in that above-mentioned turn
Change processing and carries out 90-150s at 25-35 DEG C of temperature.
7. the preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating as claimed in claim 5, which is characterized in that above-mentioned turn
The pH for changing liquid is 3.5-4.5.
8. the preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating as claimed in claim 4, which is characterized in that above-mentioned turn
Change in liquid, hexa metaphosphoric acid na concn 0.5gL-1。
9. the preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating as claimed in claim 5, which is characterized in that above-mentioned turn
Change in liquid, six nitric hydrate cerium concentration 0.1gL-1。
10. the preparation method of aluminum alloy surface titanium zirconium cerium chemical composition coating as claimed in claim 3, which is characterized in that above-mentioned
In conversion fluid, H2TiF6Concentration is 2mlL-1, H2ZrF6Concentration is 1mlL-1。
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| CN114635129A (en) * | 2022-04-18 | 2022-06-17 | 武汉材料保护研究所有限公司 | Synchronous chemical conversion method suitable for various aluminum alloys and galvanized steel materials |
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| US20070026254A1 (en) * | 2003-06-11 | 2007-02-01 | Mohamed Ben-Malek | Method for processing surfaces of aluminium alloy sheets and strips |
| CN103103512A (en) * | 2011-11-15 | 2013-05-15 | 广东兴发铝业有限公司 | Rare-earth modified Ti-Zr chemical passivation solution for surface treatment of aluminium profiles and using method of rare-earth modified Ti-Zr chemical passivation solution |
| CN103668161A (en) * | 2013-11-14 | 2014-03-26 | 中国科学院过程工程研究所 | Manganese-titanium serial chromium-free passivation liquid on surface of aluminum alloy and passivation method thereof |
| CN108070852A (en) * | 2016-11-18 | 2018-05-25 | 中国科学院金属研究所 | One kind is applied to 2024 aluminum alloy surface titanium zirconium conversion fluids and its application method |
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| CN114635129A (en) * | 2022-04-18 | 2022-06-17 | 武汉材料保护研究所有限公司 | Synchronous chemical conversion method suitable for various aluminum alloys and galvanized steel materials |
| CN114635129B (en) * | 2022-04-18 | 2023-08-29 | 中国机械总院集团武汉材料保护研究所有限公司 | Synchronous chemical conversion method suitable for various aluminum alloy and galvanized steel materials |
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