CN108031634A - A kind of sheet metal pretreatment to the coating method - Google Patents
A kind of sheet metal pretreatment to the coating method Download PDFInfo
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- CN108031634A CN108031634A CN201711232193.3A CN201711232193A CN108031634A CN 108031634 A CN108031634 A CN 108031634A CN 201711232193 A CN201711232193 A CN 201711232193A CN 108031634 A CN108031634 A CN 108031634A
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- sheet metal
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- coating method
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
- B05D3/102—Pretreatment of metallic substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of sheet metal pretreatment to the coating method, include the following steps：（1）Surface cleaning processing,（2）Acidleach processing,（3）Blasting treatment,（4）Surface modification treatment,（5）Drying process.The present invention has carried out sheet metal special processing, improves the surface characteristic of sheet metal, enhances it and paint ability and stability, improve the effect and quality of spray painting, has good application value.
Description
Technical field
The invention belongs to sheet metal working process technical field, and in particular to a kind of sheet metal pretreatment to the coating method.
Background technology
The metal material is simple metal and its alloy on ordinary meaning, is the basic material for forming modern civilization society
One of.And the problems such as aging, corrosion occurs when being used in natural environment for common metal material, and then serious have impact on
It uses characteristic, it is therefore desirable to carries out the surface treatment such as anti-corrosion.It is more for the surface treatment method of metal material at present, such as phosphorus
Change processing, Passivation Treatment, spray painting processing etc., can form a protective layer, so as to strengthen metal material on the surface of metal material
Performance.Wherein spray painting processing can not only provide protective filmy layer, while can also change the appearance characteristics of metal material, assign
The more preferable appreciation effect of workpiece has been given, has been widely used in life.The fine or not only product with paint vehicle itself of spray painting treatment effect
Matter is related, while also related to the method for spray treatment, and the combination that good processing method can be lifted between enamelled coating and metallic matrix is strong
Degree, is a big improvement direction of enhancing spray painting treatment effect.It is more in existing most spray painting treatment technologies that there is the easy tortoise of enamelled coating
The problems such as splitting, coming off is, it is necessary to continuous Optimal improvements.
The content of the invention
The purpose of the present invention is for it is existing the problem of, there is provided a kind of sheet metal pretreatment to the coating method.
The present invention is achieved by the following technical solutions：
A kind of sheet metal pretreatment to the coating method, includes the following steps：
（1）Surface cleaning processing：
Sheet metal is first put into 15 ~ 20min of immersion treatment in electrochemical deoiling liquid, then takes out and is rinsed once with clear water, most
Stand afterwards drain it is spare after surface moisture；
（2）Acidleach is handled：
By step（1）Sheet metal after processing is put into acid solution and is taken out after 9 ~ 12min of immersion treatment, then takes out and uses clear water
Rinse once, finally stand drain it is spare after surface moisture；
（3）Blasting treatment：
By step（2）Sheet metal after processing, which is put into sandblasting instrument, carries out blasting treatment, during which controls the pressure of sandblasting
For 0.5 ~ 0.55MPa, after the completion of sheet metal is taken out it is spare；
（4）Surface modification treatment：
By step（3）Sheet metal after processing is put into 1 ~ 1.5h of immersion treatment in modification liquid, and during which heating keeps modification liquid
Temperature be 65 ~ 70 DEG C, after the completion of take out it is spare；The modification liquid by following parts by weight material composition：20 ~ 25 parts of silane idols
Join agent, 5 ~ 8 parts of sodium tripolyphosphates, 10 ~ 15 parts of bacteria celluloses, 4 ~ 7 parts of neopelexes, 6 ~ 10 parts of tartaric acid, 300
~ 350 parts of water；
（5）Drying process：
By step（4）Sheet metal after processing, which is put into drying box, is dried processing, is taken out after 1 ~ 2h.
Further, step（1）Described in electrochemical deoiling liquid be acetone.
Further, step（2）Described in acid solution be salpeter solution that mass fraction is 6 ~ 9%.
Further, step（3）Described in blasting treatment when to control the granular size of blast media be 0.6 ~ 0.7mm,
The angle of injection is in 90 ° with workpiece surface, and the distance of nozzle and workpiece surface is 100 ~ 105mm.
Further, step（4）Described in immersion treatment when be persistently ultrasonically treated, control the frequency of ultrasound for 80 ~
85kHz。
Further, step（5）Described in drying process when to control temperature in drying box be 80 ~ 85 DEG C.
In order to lift the effect of spray painting processing, the present invention provides a kind of improved pretreatment to the coating method, effectively improve
The spraying using effect of paint vehicle, wherein first carried out cleaning, acidleach processing to sheet metal, eliminate the impurity on its surface into
Point, while metal has been activated again, good basis has been established for follow-up processing, has then carried out blasting treatment, has utilized height at a high speed
The tiny sand grains of energy impacts sheet metal surface, enhances the structure complexity of sheet metal surface well, appropriateness
Surface roughness is improved, is handled beneficial to follow-up modification and spray painting, has finally carried out surface modification treatment, is prepared using uniqueness
Modification liquid sheet metal surface is handled, the silane coupling agent in modification liquid can be coupled to form silicon in sheet metal surface
Alkane film, bacteria cellulose component can with silane film be crosslinked it is compound, lift the complexity of film layer, and enhance film layer degree of sprawling and
Uniformity, the sodium tripolyphosphate of addition enhances crosslinking degree between macromolecule component and the combination of itself and metal surface is strong
Degree, a complicated hybrid films are formd after final collective effect processing in sheet metal surface, with sheet metal surface, and paint
Bond strength between material is higher, and then improves the effect of spray painting processing.
The present invention has the following advantages compared with prior art：
The present invention has carried out sheet metal special processing, improves the surface characteristic of sheet metal, enhances it and paint energy
Power and stability, improve the effect and quality of spray painting, have good application value.
Embodiment
Embodiment 1
A kind of sheet metal pretreatment to the coating method, includes the following steps：
（1）Surface cleaning processing：
Sheet metal is first put into immersion treatment 15min in electrochemical deoiling liquid, then takes out and is rinsed once with clear water, it is last quiet
Put drain it is spare after surface moisture；
（2）Acidleach is handled：
By step（1）Sheet metal after processing is put into acid solution and is taken out after immersion treatment 9min, then takes out and is rushed with clear water
Wash once, finally stand drain it is spare after surface moisture；
（3）Blasting treatment：
By step（2）Sheet metal after processing, which is put into sandblasting instrument, carries out blasting treatment, during which controls the pressure of sandblasting
For 0.5MPa, after the completion of sheet metal is taken out it is spare；
（4）Surface modification treatment：
By step（3）Sheet metal after processing is put into immersion treatment 1h in modification liquid, and during which heating keeps the temperature of modification liquid
Spend for 65 DEG C, after the completion of take out it is spare；The modification liquid by following parts by weight material composition：20 parts of silane coupling agents, 5 part three
Polyphosphate sodium, 10 parts of bacteria celluloses, 4 parts of neopelexes, 6 parts of tartaric acid, 300 parts of water；
（5）Drying process：
By step（4）Sheet metal after processing, which is put into drying box, is dried processing, is taken out after 1h.
Further, step（1）Described in electrochemical deoiling liquid be acetone.
Further, step（2）Described in acid solution be salpeter solution that mass fraction is 6%.
Further, step（3）Described in blasting treatment when to control the granular size of blast media be 0.6 ~ 0.7mm,
The angle of injection is in 90 ° with workpiece surface, and the distance of nozzle and workpiece surface is 100mm.
Further, step（4）Described in immersion treatment when be persistently ultrasonically treated, control ultrasound frequency be
80kHz。
Further, step（5）Described in drying process when to control temperature in drying box be 80 DEG C.
Embodiment 2
A kind of sheet metal pretreatment to the coating method, includes the following steps：
（1）Surface cleaning processing：
Sheet metal is first put into immersion treatment 18min in electrochemical deoiling liquid, then takes out and is rinsed once with clear water, it is last quiet
Put drain it is spare after surface moisture；
（2）Acidleach is handled：
By step（1）Sheet metal after processing is put into acid solution and is taken out after immersion treatment 10min, then takes out and is rushed with clear water
Wash once, finally stand drain it is spare after surface moisture；
（3）Blasting treatment：
By step（2）Sheet metal after processing, which is put into sandblasting instrument, carries out blasting treatment, during which controls the pressure of sandblasting
For 0.53MPa, after the completion of sheet metal is taken out it is spare；
（4）Surface modification treatment：
By step（3）Sheet metal after processing is put into immersion treatment 1.2h in modification liquid, and during which heating keeps modification liquid
Temperature be 68 DEG C, after the completion of take out it is spare；The modification liquid by following parts by weight material composition：23 parts of silane coupling agents, 7 parts
Sodium tripolyphosphate, 12 parts of bacteria celluloses, 6 parts of neopelexes, 8 parts of tartaric acid, 320 parts of water；
（5）Drying process：
By step（4）Sheet metal after processing, which is put into drying box, is dried processing, is taken out after 1.5h.
Further, step（1）Described in electrochemical deoiling liquid be acetone.
Further, step（2）Described in acid solution be salpeter solution that mass fraction is 8%.
Further, step（3）Described in blasting treatment when to control the granular size of blast media be 0.6 ~ 0.7mm,
The angle of injection is in 90 ° with workpiece surface, and the distance of nozzle and workpiece surface is 103mm.
Further, step（4）Described in immersion treatment when be persistently ultrasonically treated, control ultrasound frequency be
82kHz。
Further, step（5）Described in drying process when to control temperature in drying box be 83 DEG C.
Embodiment 3
A kind of sheet metal pretreatment to the coating method, includes the following steps：
（1）Surface cleaning processing：
Sheet metal is first put into immersion treatment 20min in electrochemical deoiling liquid, then takes out and is rinsed once with clear water, it is last quiet
Put drain it is spare after surface moisture；
（2）Acidleach is handled：
By step（1）Sheet metal after processing is put into acid solution and is taken out after immersion treatment 12min, then takes out and is rushed with clear water
Wash once, finally stand drain it is spare after surface moisture；
（3）Blasting treatment：
By step（2）Sheet metal after processing, which is put into sandblasting instrument, carries out blasting treatment, during which controls the pressure of sandblasting
For 0.55MPa, after the completion of sheet metal is taken out it is spare；
（4）Surface modification treatment：
By step（3）Sheet metal after processing is put into immersion treatment 1.5h in modification liquid, and during which heating keeps modification liquid
Temperature be 70 DEG C, after the completion of take out it is spare；The modification liquid by following parts by weight material composition：25 parts of silane coupling agents, 8 parts
Sodium tripolyphosphate, 15 parts of bacteria celluloses, 7 parts of neopelexes, 10 parts of tartaric acid, 350 parts of water；
（5）Drying process：
By step（4）Sheet metal after processing, which is put into drying box, is dried processing, is taken out after 2h.
Further, step（1）Described in electrochemical deoiling liquid be acetone.
Further, step（2）Described in acid solution be salpeter solution that mass fraction is 9%.
Further, step（3）Described in blasting treatment when to control the granular size of blast media be 0.6 ~ 0.7mm,
The angle of injection is in 90 ° with workpiece surface, and the distance of nozzle and workpiece surface is 105mm.
Further, step（4）Described in immersion treatment when be persistently ultrasonically treated, control ultrasound frequency be
85kHz。
Further, step（5）Described in drying process when to control temperature in drying box be 85 DEG C.
Comparative example 1
This comparative example 1 compared with Example 2, eliminates step（3）Blasting treatment operates, and method and step in addition is homogeneous
Together.
Comparative example 2
This comparative example 2 compared with Example 2, eliminates step（4）Surface modification treatment operates, method and step in addition
All same.
Comparative example 3
This comparative example 3 compared with Example 2, eliminates step（4）Bacterium in surface modification treatment operation in modification liquid
Cellulose components, method and step all same in addition.
In order to contrast effect of the present invention, No. 304 stainless steels are selected as experimental subjects, respectively with above-described embodiment 2, contrast
Embodiment 1, comparative example 2, the method described in comparative example 3 are handled, after the completion of be coated again with coating of the same race
Processing（Coating is epoxy resin-matrix coating, wherein containing the nano silicon dioxide filler component that mass fraction is 3%）, it is finally right
Stainless steel work-piece after each group processing carries out attribute test, and specific correction data is as shown in table 1 below：
Table 1
| Coating acid resistance observed result | Fatigue life（It is secondary） | |
| Embodiment 2 | It is unchanged | 16852 |
| Comparative example 1 | Surface is turned white, loss of gloss, blistering are serious | 12865 |
| Comparative example 2 | Surface is turned white, loss of gloss, blistering are serious | 12344 |
| Comparative example 3 | Surface is turned white, loss of gloss, micro- blistering | 14521 |
Note：Coating acid resistance observed result described in upper table 1 is with reference to GB/T 1763-79（88）Tested；The fatigue
Service life is the parameter for characterizing fatigue strength, is tested with reference to GB/T3075-2008, and the loading force specifically loaded is ± 22kN,
The temperature of experiment is 25 DEG C.
Processing method of the present invention can effectively lift the effect of spray painting processing it can be seen from upper table 1, enhance to metal
The protective treatment effect of plate, great application value.
Claims (6)
- A kind of 1. sheet metal pretreatment to the coating method, it is characterised in that include the following steps：（1）Surface cleaning processing：Sheet metal is first put into 15 ~ 20min of immersion treatment in electrochemical deoiling liquid, then takes out and is rinsed once with clear water, most Stand afterwards drain it is spare after surface moisture；（2）Acidleach is handled：By step（1）Sheet metal after processing is put into acid solution and is taken out after 9 ~ 12min of immersion treatment, then takes out and uses clear water Rinse once, finally stand drain it is spare after surface moisture；（3）Blasting treatment：By step（2）Sheet metal after processing, which is put into sandblasting instrument, carries out blasting treatment, during which controls the pressure of sandblasting For 0.5 ~ 0.55MPa, after the completion of sheet metal is taken out it is spare；（4）Surface modification treatment：By step（3）Sheet metal after processing is put into 1 ~ 1.5h of immersion treatment in modification liquid, and during which heating keeps modification liquid Temperature be 65 ~ 70 DEG C, after the completion of take out it is spare；The modification liquid by following parts by weight material composition：20 ~ 25 parts of silane idols Join agent, 5 ~ 8 parts of sodium tripolyphosphates, 10 ~ 15 parts of bacteria celluloses, 4 ~ 7 parts of neopelexes, 6 ~ 10 parts of tartaric acid, 300 ~ 350 parts of water；（5）Drying process：By step（4）Sheet metal after processing, which is put into drying box, is dried processing, is taken out after 1 ~ 2h.
- A kind of 2. sheet metal pretreatment to the coating method according to claim 1, it is characterised in that step（1）Described in Electrochemical deoiling liquid is acetone.
- A kind of 3. sheet metal pretreatment to the coating method according to claim 1, it is characterised in that step（2）Described in Acid solution is the salpeter solution that mass fraction is 6 ~ 9%.
- A kind of 4. sheet metal pretreatment to the coating method according to claim 1, it is characterised in that step（3）Described in The granular size that blast media is controlled during blasting treatment is 0.6 ~ 0.7mm, and angle and the workpiece surface of injection are in 90 °, nozzle with The distance of workpiece surface is 100 ~ 105mm.
- A kind of 5. sheet metal pretreatment to the coating method according to claim 1, it is characterised in that step（4）Described in soak Persistently it is ultrasonically treated during bubble processing, the frequency for controlling ultrasound is 80 ~ 85kHz.
- A kind of 6. sheet metal pretreatment to the coating method according to claim 1, it is characterised in that step（5）Described in do It is 80 ~ 85 DEG C that the temperature in drying box is controlled during dry processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711232193.3A CN108031634A (en) | 2017-11-30 | 2017-11-30 | A kind of sheet metal pretreatment to the coating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711232193.3A CN108031634A (en) | 2017-11-30 | 2017-11-30 | A kind of sheet metal pretreatment to the coating method |
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| CN201711232193.3A Pending CN108031634A (en) | 2017-11-30 | 2017-11-30 | A kind of sheet metal pretreatment to the coating method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108914168A (en) * | 2018-08-01 | 2018-11-30 | 苏州嘉迈德电子科技有限公司 | A kind of sheet metal surface treatment process |
| CN110722891A (en) * | 2019-10-15 | 2020-01-24 | 界首市兴华渔具有限公司 | Processing method for enhancing food calling capability and stability of bionic bait |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108914168A (en) * | 2018-08-01 | 2018-11-30 | 苏州嘉迈德电子科技有限公司 | A kind of sheet metal surface treatment process |
| CN110722891A (en) * | 2019-10-15 | 2020-01-24 | 界首市兴华渔具有限公司 | Processing method for enhancing food calling capability and stability of bionic bait |
| CN110722891B (en) * | 2019-10-15 | 2020-12-25 | 界首市兴华渔具有限公司 | Processing method for enhancing food calling capability and stability of bionic bait |
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