CN108796487A - A kind of chrome-free tanning agent suitable for aluminium alloy - Google Patents
A kind of chrome-free tanning agent suitable for aluminium alloy Download PDFInfo
- Publication number
- CN108796487A CN108796487A CN201710300140.4A CN201710300140A CN108796487A CN 108796487 A CN108796487 A CN 108796487A CN 201710300140 A CN201710300140 A CN 201710300140A CN 108796487 A CN108796487 A CN 108796487A
- Authority
- CN
- China
- Prior art keywords
- chrome
- free tanning
- aluminium alloy
- tanning agent
- model
- 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.)
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Classifications
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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
- C23C22/48—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 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/56—Treatment of aluminium or alloys based thereon
-
- 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
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
Abstract
The invention discloses a kind of chrome-free tanning agents suitable for aluminium alloy to be grouped as every L chrome-free tanning agents by the group of following quality：50% amino silane or/and epoxy silane, 10% titanium dioxide, 10% zirconium compounds or/and titanium compound, 3% copper ion, 5% starch, 5% sodium phenylacetate, 3% polyamide polyethylene glycol, 1% sodium bicarbonate, 3% alum, 2% sulfonated castor oil, 2% sebacic acid and water surplus.By a variety of organic phosphoric acids and various metals ion, a variety of nano-particles different degrees of chelating occurs for passivator of the present invention, on the one hand can enhance the thickness and consistency of passivation film；The passivation film (inorganic film) formed after chelating simultaneously can show a degree of color in aluminum alloy surface.
Description
Technical field
The present invention relates to it is a kind of without chromium, manganese element passivator more particularly to it is a kind of be suitable for aluminium alloy application before
Chrome-free tanning agent.
Background technology
The Al alloy parts of the types such as aluminium section bar or aluminium wheels usually require to be surface-treated to enhance gold before application
Belong to the adhesion property between coating, currently, the aluminum alloy surface treatment technology before application mostly uses Cr VI passivation process.
But the processing method heavy metal ion containing Cr VI, toxicity is big, and environmental pollution is serious, the implementation of European Union's RoHS environmental protection instruction,
Specific limitation is proposed to harmful substances such as Cr VIs to require.Therefore, in recent years both at home and abroad at aluminum alloy surface
The research for managing Trend of Chrome-free technology is always a hot spot.
Currently as the chromium-free deactivation technology that can substitute traditional hexavalent chromium-treatments mode, including zirconium titanium system, molybdate body
System, rare earth salt system and organosilane systems etc..These known chromium-free treatment technologies can effectively solve the problem that sexavalence chromium passivating
Caused by technology the problems such as environmental pollution.But the passivation effect of these chromium-free deactivation technologies exists centainly with Cr VI technology
Gap.In addition, the film layer that traditional Cr VI passivator can be formed in aluminum alloy surface shows certain color, it is conveniently operated
Personnel judge the process of reaction, and the film layer that current chromium-free deactivation technology is formed in aluminum alloy surface is all colourless, this gives
Site operation personnel judges whether that form film layer causes certain puzzlement.Therefore a kind of that both there is good inactivating performance, simultaneously
The film layer of formation can show that the exploitation of the chrome-free tanning agent of color is necessary in aluminum alloy surface again.
Invention content
Goal of the invention：Technical problem to be solved by the invention is to provide a kind of chrome-free tanning agent suitable for aluminium alloy,
On the one hand the passivator can enhance the thickness and consistency of aluminum alloy surface passivation film, in addition, can also make the passivation to be formed
Film layer shows color in aluminum alloy surface.
Invention content：In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of chrome-free tanning agent suitable for aluminium alloy is grouped as every L chrome-free tanning agents by the group of following quality：
50% amino silane or/and epoxy silane, 10% titanium dioxide, 10% zirconium compounds or/and titanium compound, 3%
Copper ion, 5% starch, 5% sodium phenylacetate, 3% polyamide polyethylene glycol, 1% sodium bicarbonate, 3% alum, 2% sulfonation castor
Sesame oil, 2% sebacic acid and water surplus.
Advantageous effect：A variety of organic phosphoric acids are added containing by a plurality of types of metal ions, nanometer passivator of the present invention
In the system of particle and silane coupling agent composition, organic phosphoric acid can occur different degrees of with metal ion, nano-particle
Chelating, on the one hand can enhance the thickness and consistency of passivation film, further increase passivation film antiseptic property and with
The physical bond ability of post-coatings；The passivation film (inorganic film) that is formed and other compositions is common after chelating simultaneously
A degree of color can be shown by acting on aluminum alloy surface, therefore site operation personnel can quickly judge aluminium alloy
Whether surface forms passivation film.
Specific implementation mode
According to following embodiments, the present invention may be better understood.However, as it will be easily appreciated by one skilled in the art that real
It applies content described in example and is merely to illustrate the present invention, without sheet described in detail in claims should will not be limited
Invention.
Embodiment 1
A kind of chrome-free tanning agent suitable for aluminium alloy is grouped as every L chrome-free tanning agents by the group of following quality：
50% amino silane or/and epoxy silane, 10% titanium dioxide, 10% zirconium compounds or/and titanium compound, 3%
Copper ion, 5% starch, 5% sodium phenylacetate, 3% polyamide polyethylene glycol, 1% sodium bicarbonate, 3% alum, 2% sulfonation castor
Sesame oil, 2% sebacic acid and water surplus.
Comparative experimental example：
Chrome-free tanning agent handles model made from embodiment 1：
Step 1, prepare model：
Using 6063 aluminium alloy test pieces, specification is the aluminium alloy model that (150mm × 70mm × 0.8mm) is used as implementation.
Step 2, degreasing pre-processes：
According to quality degreaser is washed than preparating acid：0.5% sulfuric acid, 0.1% hydrofluoric acid, 0.1% sodium citrate, 0.2%NP-
10, surplus is water.The model of immersion treatment step 13 minutes at ambient temperature.
Step 3, the pretreated washing process of degreasing：
Model in tap water clear water after immersion treatment pickling ungrease treatment 1 minute.
Step 4, model is handled using chrome-free tanning agent made from embodiment 1：
The chrome-free tanning agent that embodiment 1 obtains is adjusted using aqueous sodium carbonate, it is 3.25 to make its pH value, is using pH value
3.25 chrome-free tanning agent processing model 3.0 minutes, by observation, there is color in specimen surface, forms a film while developing the color, is easy to sentence
It is disconnected.
, step 5, chrome-free tanning agent treated washing process：
It will be cleaned 1 minute with tap water by the processed model of chrome-free tanning agent, and reuse deionized water and rinse 30 seconds
Clock.
, step 6, drying：
Model after chrome-free tanning agent is handled and is washed is put into 10min in 110 DEG C of baking ovens.
Step 7, powder coating：
Model after drying carries out electrostatic spraying processing using powdery paints (tiger metal powder), after electrostatic spraying
Model cures 20 minutes under the conditions of 180 DEG C afterwards, and taking-up detects its film thickness in 50 μm of ± 1 μ ms after being placed at room temperature for 16h
Interior test piece to obtain the final product, the specific detection performance of test piece is shown in Table 1, and (experiment of wherein hundred lattice is that model draws 1mm after boiling water boiling 4h
Hundred lattice of × 1mm spacing investigate the binding force after powder coating；Neutral salt spray test is used for investigating the anti-corrosion of passivation film
Property).
Comparative example 1：Model is handled with certain commercially available Cr VI passivator：
Step 1, prepare model：
Using 6063 aluminium alloy test pieces, specification is the aluminium alloy model that (150mm × 70mm × 0.8mm) is used as implementation.
Step 2, degreasing pre-processes：
According to quality degreaser is washed than preparating acid：0.5% sulfuric acid, 0.1% hydrofluoric acid, 0.1% sodium citrate, 0.2%NP-
10, surplus is water.The model of immersion treatment step 13 minutes at ambient temperature.
Step 3, the pretreated washing process of degreasing：
Model in tap water clear water after immersion treatment pickling ungrease treatment 1 minute.
Step 4, model is handled using certain commercially available Cr VI passivator：
Cr VI passivator is adjusted using aqueous sodium carbonate, it is 3.25 to make its pH value, the sexavalence for the use of pH value being 3.25
Chromium passivating agent handles model 3.0 minutes, and by observation, color occurs in specimen surface.
, step 5, Cr VI passivator treated washing process：
It will be cleaned 1 minute with tap water by the processed model of Cr VI passivator, and reuse deionized water and rinse 30
Second.
, step 6, drying：
Model after Cr VI passivator is handled and is washed is put into 10min in 110 DEG C of baking ovens.
Step 7, powder coating：
Model after drying carries out electrostatic spraying processing using powdery paints (tiger metal powder), after electrostatic spraying
Model cures 20 minutes under the conditions of 180 DEG C afterwards, and taking-up detects its film thickness in 50 μm of ± 1 μ ms after being placed at room temperature for 16h
Interior test piece to obtain the final product, the specific detection performance of test piece is shown in Table 1, and (experiment of wherein hundred lattice is that model draws 1mm after boiling water boiling 4h
Hundred lattice of × 1mm spacing investigate the binding force after powder coating；Neutral salt spray test is used for investigating the anti-corrosion of passivation film
Property).
Table 1
Passivator of the present invention is used is added various metals ion and a variety of nano-particles, different type in zirconium, titanium system
Metal ion, nano-particle and silane coupling agent collaboration film forming, avoid the infiltration of corrosive medium to the greatest extent, reduce
The generation of base material corrosion, in addition combined with a variety of organic phospho acids in component, not only effectively increase the corrosion resistance of passivation film with
And the physical bond ability with post-coatings, reach the thicknesses of layers of Cr VI passivator, while can also be in aluminum alloy surface
The film layer for forming certain color facilitates Field Force fast, easily to judge whether passivation film forms by color.
Claims (1)
1. a kind of chrome-free tanning agent suitable for aluminium alloy, it is characterised in that：For every L chrome-free tanning agents, by following quality
Group is grouped as：50% amino silane or/and epoxy silane, 10% titanium dioxide, 10% zirconium compounds or/and titanizing close
Object, 3% copper ion, 5% starch, 5% sodium phenylacetate, 3% polyamide polyethylene glycol, 1% sodium bicarbonate, 3% alum,
2% sulfonated castor oil, 2% sebacic acid and water surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710300140.4A CN108796487A (en) | 2017-04-28 | 2017-04-28 | A kind of chrome-free tanning agent suitable for aluminium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710300140.4A CN108796487A (en) | 2017-04-28 | 2017-04-28 | A kind of chrome-free tanning agent suitable for aluminium alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108796487A true CN108796487A (en) | 2018-11-13 |
Family
ID=64054055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710300140.4A Pending CN108796487A (en) | 2017-04-28 | 2017-04-28 | A kind of chrome-free tanning agent suitable for aluminium alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108796487A (en) |
-
2017
- 2017-04-28 CN CN201710300140.4A patent/CN108796487A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181113 |
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| WD01 | Invention patent application deemed withdrawn after publication |