CN108998781A - A kind of car body coating front surface zirconium treatment technique - Google Patents
A kind of car body coating front surface zirconium treatment technique Download PDFInfo
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- CN108998781A CN108998781A CN201810788715.6A CN201810788715A CN108998781A CN 108998781 A CN108998781 A CN 108998781A CN 201810788715 A CN201810788715 A CN 201810788715A CN 108998781 A CN108998781 A CN 108998781A
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- zirconium
- agent
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- washing
- front surface
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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
-
- 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
-
- 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
- C23C22/78—Pretreatment of the material to be coated
Abstract
The invention discloses a kind of car body coating front surface zirconium treatment techniques, the treatment process includes the steps that successively washing workpiece after washing, zirconium treatment and zirconium before hot water wash, pre- degreasing, main degreasing, zirconium, the temperature of hot water wash, pre- degreasing and main degreasing is 45-55 DEG C, and the pH value that zirconium liquid is controlled in zirconium treatment is 4-5, F—Content is 20-70ppm, and the processing time is 150-180s, and temperature is 25-45 DEG C.Feature of the present invention is that process is simple, early investment is few, easily controllable, the environomental pollution sources such as not phosphorous, nickel, nitrite, solves the problems such as dregginess is more, energy consumption is high, pollution.
Description
Technical field
The invention belongs to car body coating front surface processing technology technical fields, and in particular to a kind of car body coating front surface zirconium
Change treatment process.
Background technique
Currently, almost all of automobile factory commercial city uses ternary Zinc phosphating technique.The shortcomings that this technique is
Waste water is generated, containing heavy metal nickel, manganese etc., chemical process is more (containing table tune, phosphatization, passivation), and phosphating reaction need to heat 50 DEG C.
With the continuous improvement required both at home and abroad energy-saving and environmental protection and sewage discharge, an urgent demand replaces tradition with new friendly process
Phosphatization.Under this overall situation demand, the novel without phosphorus conversion membrane technology of green graduallys mature and fast-developing, the technique energy
Thoroughly without using harmful substances such as P, Mn, Ni, nitrite anions, mainly there are zirconium pre-treating technology, silane pre-treatment work at present
Skill.Zirconium pre-treating technology how is used preferably to handling before car body coating, to improve body quality, be that we compel to be essential
Technical problems to be solved.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention provides a kind of vehicle
Body coating front surface zirconium treatment technique, it is therefore an objective to avoid generating the environomental pollution sources such as phosphorus, nickel, nitrite, process is simple, easily
In control.
To achieve the goals above, the technical scheme adopted by the invention is as follows:
A kind of car body coating front surface zirconium treatment technique, the treatment process include by workpiece successively through hot water wash, pre-
The step of being washed after washing, zirconium treatment and zirconium before degreasing, main degreasing, zirconium, hot water wash, the temperature of pre- degreasing and main degreasing
It is 45-55 DEG C, the pH value that zirconium liquid is controlled in zirconium treatment is 4-5, F—Content is 20-70ppm, and the processing time is 150-
180s, temperature are 25-45 DEG C.
Zirconium treatment is carried out using zirconium agent A and zirconium agent B in the zirconium liquid, zirconium agent A be zinc nitrate hexahydrate and
The mixed liquor of fluorine zirconic acid, the mass fraction of zinc nitrate hexahydrate are 5-10%, and the mass fraction of fluorine zirconic acid is 1-5%, zirconium agent B
It is the Gerhardite solution that mass fraction is 5%-10%, zirconium agent A is controlled during zirconium treatment in zirconium liquid
Absorbance is 0.7-1.5, and absorbance of the zirconium agent B in zirconium liquid is 0.1-0.5.Zirconium agent A and zirconium agent B are in respectively
It states in range of absorbency, can satisfy bodywork surface and form zirconium film well, and antiseptic property is with respect to phosphoric acid treatment process
It is stronger.
The absorbance that the additive amount of zirconium agent A and zirconium agent B pass through zirconium agent in detection zirconium liquid during zirconium treatment
It is determined, in the zirconium liquid of every 1000L volume, absorbance is every to improve 0.1, and zirconium agent A adds 2.04-2.06kg, zirconium agent B
Add 170-180g.Preferably, zirconium agent A adds 2.05kg, and zirconium agent B adds 177g, and film-formation result is best at this time, film thickness
Moderate, uniformly, compactness is good, and antiseptic property is relatively more preferable for the particle arrangement of film.
UsingSpectrophotometer carries out the absorbance of zirconium agent in detection zirconium liquid.
Washing includes that washing 1, washing 2 and pure water wash 1 before the zirconium.
Washing includes that washing 3, washing 4 and pure water wash 2 after the zirconium, pure water controlled after washing 2 surface conductivity≤50 μm/
cm。
Antirust agent is added in the water lotion of the washing 3 and washing 4.
The treatment process further includes the steps that carrying out spraying humidification processing before washing rear electrophoresis to prevent vehicle body from corroding.
Using cold-reduced sheet, zirconium film is very thin, film weight 20-80mg/m2。
Zirconium component A concentration and zirconium agent B component measurement of concetration are all made of existing spectrophotometry and measure.
Zirconates conversion film reaction principle
Zirconates conversion film is with zirconium (H2ZrF6) based on, in zirconates acid solution electrochemical reaction occurs for metal base,
Form one layer of nanoscale inorganic thin film.Zirconates film forming procedure is as follows:
Metal reacts under acid effect: Me+2e → Me2+
Zirconate dissociation: H2ZrF6→ZrF6 2-+2H+
Zirconates precipitating: Me2++ZrF6 2-+H2O→MeZrF6·2H2O
Beneficial effects of the present invention: zirconium treatment technique of the invention does not need table reconciliation Passivation Treatment process, therefore accounts for
Ground area is few, equipment investment is low.Zirconium treatment is easy to operate, need to only control zirconium agent content, pH value and F—Content.It is of the invention special
Point is that process is simple, early investment is few, easily controllable, and the environomental pollution sources such as not phosphorous, nickel, nitrite solve dregginess
The problems such as more, energy consumption is high, pollution.
Specific embodiment
Below by the description to embodiment, specific embodiments of the present invention will be described in further detail, purpose
Being to aid in those skilled in the art has more complete, accurate and deep understanding to design of the invention, technical solution, and helps
In its implementation.
Car body coating front surface zirconium treatment technique of the invention includes the following steps:
Step 1: hot water wash, control to impurity, temperature such as the iron filings, the particles that rinse bodywork surface at 45-55 DEG C；
Step 2: pre- degreasing, to remove the greasy dirt of workpiece surface, the temperature of pre- degreasing is 45-55 DEG C；
Step 3: main degreasing, further to remove the greasy dirt of workpiece surface, the temperature of main degreasing is 45-55 DEG C；
Step 4: washing 1, using spray process, spray pressure is in 0.1Mpa or so, the oil to get off to cleaning and degreasing
It is dirty；
Step 5: washing 2, using spray process, spray pressure gets off in 0.1Mpa or so to further cleaning and degreasing
Greasy dirt；
Step 6: pure water washes 1, using spray process, spray pressure is in 0.1Mpa or so, to ensure that vehicle body enters zirconium
Before processing, clean surface, while preventing preceding process tank liquor pollution zirconium slot；
Step 7: zirconium treatment, process control parameter are as follows: (main component: zinc nitrate hexahydrate is dense for zirconium agent component A
Spend 5%-10%, fluorine zirconic acid concentration 1-5%) concentration be 0.7-1.5 absorbance, (main component: Gerhardite is dense for B component
Spend 5%-10%) concentration be 0.1-0.5 absorbance, pH value 4-5, F-Content 20-70ppm, processing time 150-180S, temperature are normal
Temperature；Absorbance is every to improve 0.1, and zirconium agent A adds 2.04-2.06kg, and zirconium agent B adds 170-180g；When specific test, often
In the zirconium liquid of 1000L volume, if the absorbance for measuring zirconium agent component A is 0.6,2.04- is added into zirconium liquid
2.06kg zirconium agent A adds 4.08-4.12kg zirconium into zirconium liquid if the absorbance for measuring zirconium agent component A is 0.5
Agent A meets the concentration of component A in the range of 0.7-1.5 absorbance, if the absorbance for measuring zirconium agent B component is
When 0.1, then 170-180g zirconium agent B component is added into zirconium liquid, so that the concentration of B component meets in 0.1-0.5 absorbance
In the range of.
Step 8: washing 3, using spray process, spray pressure is in 0.1Mpa or so, to remove bodywork surface attachment
Impurity；
Step 9: washing 4, using spray process, spray pressure is in 0.1Mpa or so, further to remove bodywork surface
The impurity of attachment；
Step 10: pure water washes 2, using spray process, spray pressure is in 0.1Mpa or so, to ensure that vehicle body enters electrophoresis
Front surface is clean.
Above-mentioned zirconium chemical industry skill treatment temperature is 25~40 DEG C of room temperature, the treatment temperature of 35~45 DEG C of corresponding conventional phosphatizing,
Can be energy saving, while zirconium treatment is opposite few with ternary phosphorating treatment slag content, ternary phosphatization is mainly ferric phosphate sediment,
Zirconates pre-treatment is mainly FeOOH flocculation sediment.
The phenomenon that in order to avoid being also easy to produce corrosion after zirconium treatment, is added with antirust agent in washing 3 and washing 4, simultaneously
Spraying humidification processing is carried out before washing rear electrophoresis, prevents vehicle body from corroding.The additive amount of antirust agent is not easy excessively, in production operation
It is added according to actual needs, meets rust-proof effect.
Washing step is consistent with washing step after conventional phosphatizing after zirconium, but for the vehicle body of zirconium treatment cold-reduced sheet
When, because zirconium film is relatively thin, it is also easy to produce corrosion, experiments have shown that cold-reduced sheet can generate rust after zirconium treatment in air 6min
Erosion, therefore the washing step after zirconium needs to prevent vehicle body from corroding by increasing anti-dry spray or antirust agent.Different plates return embroidery
Test such as the following table 1.
Rust Experimental Comparison is returned after 1 different plates zirconium treatment of table
In the zirconium treatment step of above-mentioned steps seven, in order to enable the film forming of zirconium film reaches optimal performance, often
In 1000L volume zirconium liquid, after zirconium agent A is reacted with zirconium agent B, when the numerical value measured is not within above range, often
When changing 0.1 absorbance, in the zirconium liquid of heightization processing, zirconium agent A2.05kg is added；Add zirconium agent B 177g.
Be respectively adopted cold-reduced sheet, electrolytic galvanized sheet, heat zinc coating plate, zinc-iron alloy plate and aluminium sheet using Zinc phosphating technique and on
It states zirconium treatment technique to be handled, the phosphatization film outward appearance on different metal ground is essentially the same, but on different metal ground
The difference in appearance of zirconium film is but very big, and light golden rod yellow is presented on cold-reduced sheet CRS, presented on electrolytic galvanized sheet EG it is light blue,
Presented on heat zinc coating plate HDG it is light yellow, it is substantially identical as aluminium sheet color on aluminium sheet Al, and the color of zirconium film is with anti-
Extension between seasonable and deepen, except aluminium sheet.
Ternary phosphating coat and zirconium treatment film forming compare and are described as follows table 2
Table 2
The present invention is exemplarily described above.Obviously, present invention specific implementation is not subject to the restrictions described above.
As long as using the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out；Or it is not improved, it will
Above-mentioned conception and technical scheme of the invention directly apply to other occasions, within the scope of the present invention.
Claims (8)
1. a kind of car body coating front surface zirconium treatment technique, which is characterized in that the treatment process includes successively passing through workpiece
The step of being washed after washing, zirconium treatment and zirconium before hot water wash, pre- degreasing, main degreasing, zirconium, hot water wash, pre- degreasing and master
The temperature of degreasing is 45-55 DEG C, and the pH value that zirconium liquid is controlled in zirconium treatment is 4-5, F—Content is 20-70ppm, when processing
Between be 150-180s, temperature be 25-45 DEG C.
2. car body coating front surface zirconium treatment technique according to claim 1, which is characterized in that used in the zirconium liquid
Zirconium agent A and zirconium agent B carries out zirconium treatment, and zirconium agent A is the mixed liquor of zinc nitrate hexahydrate and fluorine zirconic acid, six nitric hydrates
The mass fraction of zinc is 5-10%, and the mass fraction of fluorine zirconic acid is 1-5%, and zirconium agent B is three that mass fraction is 5%-10%
Nitric hydrate copper solution, it is 0.7-1.5 that zirconium treatment controls absorbance of the zirconium agent A in zirconium liquid in the process, and zirconium agent B exists
Absorbance in zirconium liquid is 0.1-0.5.
3. car body coating front surface zirconium treatment technique according to claim 2, which is characterized in that zirconium during zirconium treatment
The additive amount of agent A and zirconium agent B are determined by the absorbance of zirconium agent in detection zirconium liquid, the zirconium of every 1000L volume
Change in liquid, absorbance is every to improve 0.1, and zirconium agent A adds 2.04-2.06kg, and zirconium agent B adds 170-180g.
4. the car body coating front surface zirconium treatment technique according to Claims 2 or 3, which is characterized in that useSpectrophotometer carries out the absorbance of zirconium agent in detection zirconium liquid.
5. car body coating front surface zirconium treatment technique according to claim 1, which is characterized in that wash packet before the zirconium
It includes washing 1, washing 2 and pure water and washes 1.
6. car body coating front surface zirconium treatment technique according to claim 1, which is characterized in that wash packet after the zirconium
It includes washing 3, washing 4 and pure water and washes 2, pure water controls surface conductivity≤50 μm/cm after washing 2.
7. car body coating front surface zirconium treatment technique according to claim 6, which is characterized in that the washing 3 and washing 4
Water lotion in be added with antirust agent.
8. car body coating front surface zirconium treatment technique according to claim 1, which is characterized in that the treatment process is also wrapped
It includes and carries out the step of spraying humidification processing is to prevent vehicle body from corroding before washing rear electrophoresis.
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Cited By (6)
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| CN110373701A (en) * | 2019-07-04 | 2019-10-25 | 大乘汽车集团有限公司 | A kind of technique of control vehicle body film pre-treatment film forming homogeneity |
| CN110607522A (en) * | 2019-10-12 | 2019-12-24 | 佛山市湾厦新材料科技有限公司 | Vitrification agent and preparation method and application thereof |
| CN111965332A (en) * | 2020-07-31 | 2020-11-20 | 东风本田汽车有限公司 | Method for testing matching performance of zirconium salt pretreatment process and vehicle body steel plate oil product |
| CN112246577A (en) * | 2020-09-14 | 2021-01-22 | 中国第一汽车股份有限公司 | Steel-aluminum mixed flexible coating pretreatment process |
| CN115584496A (en) * | 2022-10-25 | 2023-01-10 | 福建省长汀金龙稀土有限公司 | Surface treatment method for permanent magnet, permanent magnet and protective film thereof |
| CN116083893A (en) * | 2023-02-09 | 2023-05-09 | 广汽埃安新能源汽车股份有限公司 | Treatment method of metal substrate and material for preparing vehicle |
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Application publication date: 20181214 |