CN107904608A - Painting dressing automobiles table tune pre-treatment medium temperature degreasing agent and its degreasing method - Google Patents
Painting dressing automobiles table tune pre-treatment medium temperature degreasing agent and its degreasing method Download PDFInfo
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- CN107904608A CN107904608A CN201711311052.0A CN201711311052A CN107904608A CN 107904608 A CN107904608 A CN 107904608A CN 201711311052 A CN201711311052 A CN 201711311052A CN 107904608 A CN107904608 A CN 107904608A
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- China
- Prior art keywords
- medium temperature
- degreasing agent
- temperature degreasing
- painting dressing
- dressing automobiles
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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
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of painting dressing automobiles table tune pre-treatment medium temperature degreasing agent and its degreasing method, which is formed by the component mixture of following percentage by weight：Highly basic 30~50%, solvable phosphate 30~50%, complexing agent 10~20%, surfactant 2~6% and stabilizer 2~10%.The degreasing method is that desalination aqueous working solution is heated to 40~55 DEG C, adds the normal temperature degreasing agent of different weight percentage, and by spraying, embathing, washing three process, degreasing is carried out to autobody sheet.Cleaning performance of the present invention is excellent, adapts to the automobile coating production line of speed, effectively solves the problems, such as that surface of steel plate cleaning is sordid.
Description
Technical field
The present invention relates to a kind of medium temperature degreasing agent, particularly relate to a kind of painting dressing automobiles table tune pre-treatment medium temperature degreasing agent and its
Degreasing method.
Background technology
Chemical degreasing process is more important pre-treatment link during painting dressing automobiles, mainly using lye to grease
Saponification, emulsification, dissolving reaction remove the greasy dirt of workpiece surface.Surface chemistry cleaning treatment technique is had to pass through before table tune,
To remove the oil particles of metal surface and other surface residues, oil removing is not net in pre-treatment, can bring greasy dirt into subsequent handling,
Product quality is influenced, the quality of its treatment effect is to ensure the key of painting quality.
For chemical degreasing process generally by the way of spray is embathed and is combined, this mode had both remained the efficient of spray
Rate, improves processing speed, and has the process of embathing concurrently, workpiece all sites is can obtain effective processing.The oil of cold-strip steel
Dirt is generally three kinds of oils：Vegetable oil, animal oil and mineral oil.It can be divided into saponifiable oil and non-soap carburetion by its chemical property,
All animal and vegetable oils belong to saponifiable oil, these oil and alkali effect generation soap；Mineral oil is all non-saponified oil, is used
Metal cleaner containing surfactant is relatively adapted to, and when use is diluted with water by a certain percentage, the effect of surfactant
The surface tension of solution can be significantly reduced, makes the adhesive force of mineral oil reduce.
Traditional degreasing agent mainly has following several classes：1) organic solvent, such as gasoline, freon, trichloroethanes, toluene, second
Alcohol etc., organic solvent are good to the cleaning effect of soluble greasy dirt, but are difficult to clean off inorganic particle, metallic particles etc., and generally
High volatility, it is poisonous and harmful, it is unfavorable for site work environment；2) lye, such as sodium hydroxide, tertiary sodium phosphate, sodium metasilicate, pass through
Saponification comes degreasing, therefore the poor processing effect of non-saponified grease, and may cause corrosion；3) emulsion,
The various greasy dirts of metal surface can be removed, cleaning performance is good, but general stability is poor, can not store for a long time, and when use needs
It is stirred to keep dispersiveness, causes inconvenient for use, improve cost.
In addition, paint line is tinuous production, speed of production is very fast, and different paint line, cleaning temperature has difference
Not.Using existing degreasing agent, in the case where 40~55 DEG C of medium temperatures are cleaned, saponification, emulsifying capacity be not strong, cause surface of steel plate usually by
Do not washed clean in clearly, have impact on product quality.
The content of the invention
It is an object of the invention to provide a kind of cleaning performance is good, painting dressing automobiles table suitable for the cleaning of 40~55 DEG C of medium temperatures
Adjust pre-treatment medium temperature degreasing agent and its degreasing method.
To achieve the above object, painting dressing automobiles table tune pre-treatment medium temperature degreasing agent provided by the present invention, by following weight
The component mixture of percentage forms：Highly basic 30~50%, solvable phosphate 30~50%, complexing agent 10~20%, surface-active
Agent 2~6% and stabilizer 2~10%.
Preferably, the highly basic uses NaOH, and the solvable phosphate uses Na3PO4。
Preferably, the complexing agent uses tetrasodium ethylenediamine tetraacetate.
Preferably, the surfactant uses neopelex.
Preferably, for the stabilizer using n,N-Dimethylformamide, the compounding mixture of monoethanolamine, the two accounts for institute respectively
State the 1~5% of medium temperature degreasing agent.
The effect of painting dressing automobiles table tune pre-treatment medium temperature degreasing agent each component of the present invention is as follows：
Highly basic cleans the mechanism of greasy dirt, it is considered that it is easy to become solution in the vegetable and animals oils chemically reactive in greasy dirt, generation
The soap and glycerine of water, so as to degrease, this chemical process is also known as saponification.In view of the factors such as cost, highly basic choosing
Select sodium hydroxide.
Solvable phosphate (may be dissolved in degreasers and make phosphate in liquid), have buffered pH value effect, phosphate is dense
Degree is bigger, and buffer capacity is bigger, when phosphate content reaches 10%, is further added by phosphate concn, pH value change is little.
The soap of the metal ions such as Fe, Ca, Mg is not soluble in water to be deposited in cleaning equipment, can also be adhered to again
Steel plate and cause cleaning efficiency to decline.Complexing agent is added in alkali cleaning agent to be formed with metal ions such as Fe, Ca, Mg in cleaning solution
Complex, reduces the possibility that these metal ions form metallic soap with fat saponification.
Neopelex plays the role of moistening, infiltration, solubilising, can significantly reduce the surface tension of solution,
Cleaning solution is set to soak and spread over steel surface.
N,N-Dimethylformamide and monoethanolamine compounding mixture, can play the role of oil removing, can also stablize cleaning solution,
Suppress the generation of precipitation.
Invention also provides a kind of painting dressing automobiles table tune pre-treatment degreasing especially optimized for foregoing medium temperature degreasing agent
Method, including spray, embathe, wash three process, wherein：The spray process is by 4.5~5% medium temperature degreasing agent
It is added in 40~55 DEG C of desalination aqueous working solution, pending surface of workpiece is sprayed after being sufficiently mixed, sprays
2~3min of time, pressure 0.15MPa~0.25MPa；The process of embathing is by 3~3.5% medium temperature degreasing agent addition
Into 40~55 DEG C of desalination aqueous working solution, pending surface of workpiece is embathed after being sufficiently mixed, embathes the time 1
~2min；The washing step is using 40~55 DEG C of desalination aqueous working solution for being not added with degreasing agent, directly to pending
Surface of workpiece is cleaned, 1~1.5min of scavenging period.
Compared with prior art, the beneficial effects of the present invention are：
1) the painting dressing automobiles table tune pre-treatment medium temperature degreasing agent, is added in working solution, saponification, emulsification to grease, molten
Solution ability is strong, and cleaning performance is good, coordinates degreasing method provided by the invention, reaches 99% to the cleaning efficiency of workpiece surface greasy dirt
More than, surface of steel plate residue is less than 6mg/m2。
2) the pH value cushioning effect that the degreasing agent has had, in certain cleaning temperature and concentration range, has still had
Cleaning performance, avoid because cleaning temperature and fluctuation of concentration cause it is cleaning dirty.
3) degreasing agent is without chromium, nitrite, no intense irritation smell.
Embodiment
Below by embodiment, the present invention is described in further detail.
Embodiment 1
The present embodiment configures painting dressing automobiles table tune pre-treatment medium temperature degreasing agent as follows：Hydrogen-oxygen is taken by weight percentage
Change sodium 30%, tertiary sodium phosphate 50%, tetrasodium ethylenediamine tetraacetate 10%, neopelex 2%, N, N- dimethyl formyls
Amine 5%, monoethanolamine 3%, these raw materials are uniformly mixed.
The present embodiment provides the method that painting dressing automobiles table tune pre-treatment degreasing is carried out using the degreasing agent, its step at the same time
It is as follows：
1) desalination aqueous working solution is heated to 55 DEG C；
2) process is sprayed：Partially desalted aqueous working solution is taken, 5% medium temperature degreasing agent is added, to pending after being sufficiently mixed
Surface of workpiece sprayed, spray time 3min, pressure 0.2MPa；
3) process is embathed：Partially desalted aqueous working solution is taken, 3.5% medium temperature degreasing agent is added, place is treated after being sufficiently mixed
The surface of workpiece of reason is embathed, and embathes time 2min；
4) washing step：Partially desalted aqueous working solution is taken, degreasing agent is not added, directly to pending surface of workpiece
Carry out full leaching cleaning, scavenging period 1.5min.
By above-mentioned technique, surface of steel plate cleaning efficiency is 99.6%, and surface of steel plate residue is 4.2mg/m2, estimate steel plate
The ratio that surface moisture area coverage accounts for whole plate face is 100%.
Embodiment 2~5
Painting dressing automobiles table tune pre-treatment medium temperature degreasing agent is configured by component ratio in table 1.
Each embodiment component formula table of table 1
| Component | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Sodium hydroxide | 30% | 50% | 35% | 35% | 40% |
| Tertiary sodium phosphate | 50% | 30% | 35% | 40% | 33% |
| Tetrasodium ethylenediamine tetraacetate | 10% | 12% | 20% | 15% | 17% |
| Neopelex | 2% | 2% | 6% | 4% | 3% |
| N,N-dimethylformamide | 5% | 1% | 2% | 5% | 3% |
| Monoethanolamine | 3% | 5% | 2% | 1% | 4% |
The actual effect of the medium temperature degreasing agent configured by process conditions in step in embodiment 1 and table 2 to each embodiment
Tested, acquired results are shown in Table 2.
Each embodiment degreasing process of table 2 and effect
As can be seen from the above table, the painting dressing automobiles table tune pre-treatment medium temperature degreasing agent that the present invention is configured, cleaning efficiency
More than 99%, surface of steel plate residue is less than 6mg/m2, range estimation surface of steel plate moisture area coverage account for the ratio of whole plate face >=
95%, its cleaning performance is excellent, adapts to the automobile coating production line of speed, effectively prevents surface of steel plate from not washing clean clearly
The problem of.
Claims (6)
- A kind of 1. painting dressing automobiles table tune pre-treatment medium temperature degreasing agent, it is characterised in that：The medium temperature degreasing agent is by following weight percent The component mixture of ratio forms：Highly basic 30~50%, solvable phosphate 30~50%, complexing agent 10~20%, surfactant 2~ 6% and stabilizer 2~10%.
- 2. painting dressing automobiles table tune pre-treatment medium temperature degreasing agent according to claim 1, it is characterised in that：The highly basic uses NaOH, the solvable phosphate use Na3PO4。
- 3. painting dressing automobiles table tune pre-treatment medium temperature degreasing agent according to claim 1, it is characterised in that：The complexing agent is adopted Use tetrasodium ethylenediamine tetraacetate.
- 4. painting dressing automobiles table tune pre-treatment medium temperature degreasing agent according to claim 1, it is characterised in that：The surface-active Agent uses neopelex.
- 5. painting dressing automobiles table tune pre-treatment medium temperature degreasing agent according to claim 1, it is characterised in that：The stabilizer is adopted With n,N-Dimethylformamide, the compounding mixture of monoethanolamine, the two accounts for the 1~5% of the medium temperature degreasing agent respectively.
- A kind of 6. painting dressing automobiles table tune pre-treatment degreasing side using the medium temperature degreasing agent as any one of Claims 1 to 5 Method, it is characterised in that：Including spraying, embathing, washing three process, wherein：The spray process is by described in 4.5~5% Medium temperature degreasing agent is added in 40~55 DEG C of desalination aqueous working solution, and pending surface of workpiece is carried out after being sufficiently mixed Spray, 2~3min of spray time, pressure 0.15MPa~0.25MPa；The process of embathing is by 3~3.5% medium temperature Degreasing agent is added in 40~55 DEG C of desalination aqueous working solution, and pending surface of workpiece is soaked after being sufficiently mixed Wash, embathe 1~2min of time；The washing step is to use 40~55 DEG C of desalination aqueous working solution for being not added with degreasing agent, directly Connect and pending surface of workpiece is cleaned, 1~1.5min of scavenging period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711311052.0A CN107904608A (en) | 2017-12-11 | 2017-12-11 | Painting dressing automobiles table tune pre-treatment medium temperature degreasing agent and its degreasing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711311052.0A CN107904608A (en) | 2017-12-11 | 2017-12-11 | Painting dressing automobiles table tune pre-treatment medium temperature degreasing agent and its degreasing method |
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| CN107904608A true CN107904608A (en) | 2018-04-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109295491A (en) * | 2018-11-08 | 2019-02-01 | 天津磊峰实业有限公司 | A kind of pretreatment process for electrophoresis coating |
-
2017
- 2017-12-11 CN CN201711311052.0A patent/CN107904608A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109295491A (en) * | 2018-11-08 | 2019-02-01 | 天津磊峰实业有限公司 | A kind of pretreatment process for electrophoresis coating |
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Application publication date: 20180413 |
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