CN105521930A - Assembly painting method for improving coating adhesion force - Google Patents
Assembly painting method for improving coating adhesion force Download PDFInfo
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- CN105521930A CN105521930A CN201510901430.5A CN201510901430A CN105521930A CN 105521930 A CN105521930 A CN 105521930A CN 201510901430 A CN201510901430 A CN 201510901430A CN 105521930 A CN105521930 A CN 105521930A
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- paint
- assembly
- coating adhesion
- assembly method
- spraying
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/12—Applying particulate materials
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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
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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
- B05D3/02—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
-
- 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
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses an assembly painting method for improving coating adhesion force. The method comprises the following steps: 1) roughing the surfaces of parts, controlling the roughness of the surfaces to be 1.6 to 6.3 microns, then washing through a solvent, and drying; 2) spraying epoxy primer, and controlling the thickness of a dried film to be 70 to 100 microns; 3) spraying fluorocarbon finish, and controlling the thickness of the dried film to be 30 to 50 microns; 4) assembling the parts to be an assembly, grinding and levelling a painted part of the assembly, removing dirt, spraying fluorocarbon finish, and controlling the thickness of the dried film to be 30 to 50 microns, so as to obtain the product. According to the method, the parts are painted, and then the assembly is sprayed with the paint, and the process parameters of each stage are controlled, so that the environmental suitability of the parts can be improved; besides the high adhesion force, a coating of the assembly is outstanding in salt mist resistance, moist heat resistance, mould resistance, high temperature resistance and low temperature resistance; the coating is uniform and consistent in appearance and high in decoration performance.
Description
Technical field
The invention belongs to coating for metal surfaces technical field, be specifically related to a kind of assembly method for paint spraying strengthening coating adhesion.
Background technology
The coating needs of the military use product such as Aeronautics and Astronautics, automobile has excellent peel resistance and attractive in appearance ornamental, and coating, except having good corrosion resistance, also should have the characteristics such as wet-heat resisting, salt spray resistance, resistance to mould, high-low temperature resistant simultaneously.For meeting the requirement of lightweight and high strength, the said goods often selects aluminium alloy, magnesium alloy or titanium alloy material.
At present, the coating process of said modules product is part completion of processing, carries out surface treatment, warehouse-in etc. to be assembled, debugging, turnover again arrange spray paint.This time of 1 ~ 2 month of process need, piece surface is subject to severe contamination.Because all devices all assemble complete, not easily thorough to product cleaning, surface is entrapped contaminants easily; The complex structure (as comprising multiple curved-surface structure) of assembly itself simultaneously, spray area is large, surface state disunity, easily causes spraying uneven; Above-mentioned reason causes that the adhesive force of coating is low, the life-span is short, and can not bear damp and hot, salt fog, dust storm, temperature changing environment, even some coating directly comes off in less than the use procedure of a year.
Aluminium alloy, magnesium alloy or titanium alloy class material have the excellent properties such as low-density, high specific stiffness and specific strength, but its chemism is high, electrode potential is low, and decay resistance is very poor, often needs to form various coating to improve its corrosion resistance.CN101148758A discloses a kind of magnesium alloy surface phosphorization treatment fluid and processing method thereof, this treatment fluid is made up of the water of 85% phosphatase 11 0 ~ 20ml/l, zinc oxide 1 ~ 5g/l, sodium fluoride 1 ~ 3g/l, sodium nitrate 0.1 ~ 0.4g/l, hydrogen peroxide 0.5 ~ 1g/l and surplus, after above-mentioned surface phosphorization treatment fluid process, the corrosion resistance of magnesium alloy is improved.The phosphorization film layer formed by the method is excessively thin, and intensity is not high, easily forms defect, and is not suitable for corrosion resistance and requires high military assembly.
CN101130186A discloses a kind of method of spray coating finishing paint on magnesium alloy surface, comprising: first carry out the pre-treatments such as cleaning oil removing, pickling, alkali cleaning and chemical membrane process to Mg alloy surface, then carry out spraying roasting priming paint, finally complete spray paint; The method is also mentioned to and is coated with operation solves the inadequate problem of spray coating finishing paint on magnesium alloy surface adhesive force by increasing in one.
In prior art, adhesive force and the corrosion resistance of the coating of magnesium alloy class material are not high, and for the assembly of complex contour, the decorative effect on its surface is also difficult to be guaranteed.
Summary of the invention
The object of this invention is to provide a kind of assembly method for paint spraying strengthening coating adhesion, thus solve aluminium alloy, magnesium alloy or titanium alloy class material in prior art, the adhesive force of coating is not high, the problem of assembly decorative appearance difference.
In order to realize above object, the technical solution adopted in the present invention is:
Strengthen an assembly method for paint spraying for coating adhesion, comprise the following steps:
1) piece surface is carried out roughening treatment, control surface roughness is 1.6 ~ 6.3 μm, rear solvent clean, dry;
2) spray epoxy primer, controlling build is 70 ~ 100 μm;
3) spray fluorine carbon finishing paint, controlling build is 30 ~ 50 μm;
4) after Assembly of the parts being become assembly, position of being sprayed paint by assembly polishes flat, and except crude removal, spraying fluorine carbon finishing paint, controlling build is 30 ~ 50 μm, to obtain final product.
Described part is aluminium alloy, magnesium alloy or titanium alloy material.
Step 1) in, described roughening treatment is grinding process, and sand paper used of polishing is 360 ~ No. 600.2:1 is formulated by volume by aero-washing gasoline and ethanol for described solvent.Before roughening treatment, should check whether piece surface has the defects such as scuffing, spot, trachoma, does not meet the last process that returns of lacquered surface requirement, until meet the demands.Roughmeter can be utilized to detect Part Surface Roughness, and the object of roughening treatment is to obtain certain roughness, thus increases the mechanical snap power of coating and base material, makes coating obtain good inter-layer bonding force and maintains lasting attachment with base material.
The object of solvent clean removes the floating dust of piece surface, impurity and chemical oxidation Liquid Residue.By white clean silk wipe surfaces, can detect and whether have attachment, color spot or oil stain.After solvent clean, 15 ~ 60min can be incubated realize dry in 50 DEG C of baking ovens, naturally cool to room temperature afterwards.
Step 1) be the pretreatment procedure of part, by suitable pre-treatment, make base material be in cleaning, the state of activation, for follow-up spraying is ready.
Step 2) in, epoxy primer is that chiasma type sprays 4 times, after hanging 120min, in 50 DEG C of baking ovens, be incubated 1 ~ 1.5h.Spray gun air pressure is 2.0 ~ 3.0 bar, spray distance 15 ~ 25cm, spraying swath 20 ~ 25cm.Under above-mentioned process parameter control, ensure that the adhesive force of priming paint and base material is good, contribute to the priming paint obtaining uniformity.
Step 3) in, before spraying fluorine carbon finishing paint, use No. 600 sand paper uniform grinding epoxy primer lacquer paintings.By grinding process, not only make primed surface uniform ground more, be conducive to the uniformity consistency improving rear road finish paint, and improve the asperity of priming paint, contribute to rear road finish paint and infiltrate, be engaged, improve the adhesive force between finish paint, priming paint.
Step 3) in, fluorine carbon finishing paint is that chiasma type sprays 2 times, after hanging 60min, in 50 DEG C of baking ovens, be incubated 2 ~ 3h.
Step 4) in, described in the sand paper used that polishes flat be 360 ~ No. 800.Fluorine carbon finishing paint is that chiasma type sprays 2 times, after hanging 60min, in 50 DEG C of baking ovens, be incubated 2 ~ 3h.This step is the processing procedure after Assembly of the parts, it is 2.0 ~ 3.0 bar that spraying process controls spray gun air pressure, spray distance 20 ~ 30cm, spraying swath 25cm, control to make assembly outward appearance reach cosmetic requirement by above-mentioned parameter, the film uniformity consistency of formation and good decorative property.
The assembly method for paint spraying of enhancing coating adhesion provided by the invention, by step 1) to step 3) control of technological parameter, ensure that the adhesive force of each part coating, adhesive force reaches 0 grade; After Assembly of the parts, by polishing flat, the setting of solvent clean, spray paint operation, enhancing the environmental suitability of part, also ensure that the appearance uniform uniformity of assembly surface is good; By supporting the use of epoxy primer and fluorine carbon finishing paint, make assembly under the prerequisite meeting high adhesion force, salt spray resistance, wet-heat resisting, resistance to mould, thermocycling are functional, can meet and record environment user demand, reach 5 ~ 10 years service life.The each processing step of the method is workable, is conducive to the control of subassembly product coating quality, is applicable to applying.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.In following examples, the EP506 anti-corrosion primer that epoxy primer can select Qingdao Haiyang chemical research institute to produce, or the 725-H06-19 epoxy zinc chromate primer that Xiamen Shuangrui Shipbuilding Paint Co., Ltd. produces; The HFC series fluorocarbon coating that fluorine carbon finishing paint selects Qingdao Haiyang chemical research institute to produce.
Embodiment 1
The assembly method for paint spraying of the enhancing coating adhesion of the present embodiment, part is aluminum alloy materials, comprises the following steps:
1) detect piece surface and whether have the defects such as scuffing, dirt, oxide skin, rusty stain, carry out roughening treatment after qualified, make surface roughness reach 1.6 ~ 6.3 μm with No. 360 sand papering piece surfaces; Face of not spraying paint protected by use adhesive tape;
2) mixed solvent is prepared with aero-washing gasoline and ethanol with volume ratio 2:1, cleaning components surface; Dipping in solvent wiping piece surface with white silk, is qualified without dirt; Qualifiedly be placed on dry 15min in 50 DEG C of baking ovens, naturally cool to room temperature;
3) spray epoxy primer EP506, spray 4 times, after hanging 120min, be placed in 50 DEG C of dry 1h of baking oven in chiasma type, controlling build is 70 ~ 100 μm;
4) use No. 600 sand papering epoxy primer lacquer paintings, spray fluorine carbon finishing paint afterwards, spray 2 times, after hanging 60min in chiasma type, be placed in 50 DEG C of dry 2h of baking oven, controlling build is 30 ~ 50 μm; To dismantle after qualified protection sheet, Assembly of the parts is formed assembly;
5) position of being sprayed paint by assembly is smooth with No. 360 sand paperings, protects position of not spraying paint; Use step 2) mixed solvent Wipe assembly to spray paint position, dipping in solvent wiping coating surface with white silk, is qualified without dirt; Spray fluorine carbon finishing paint afterwards, first spray minor face during spraying, then spray main face, spray gun air pressure is adjusted to 3.0 bar, sprays 2 times, after hanging 60min in chiasma type, is placed in 50 DEG C of dry 2h of baking oven, and controlling build is 30 ~ 50 μm;
6) carve characters and fill out paint, removing coloured enamel remains, and tears protection open, wiped clean, to obtain final product.
Embodiment 2
The assembly method for paint spraying of the enhancing coating adhesion of the present embodiment, part is magnesium alloy materials, comprises the following steps:
1) detect piece surface and whether have the defects such as scuffing, dirt, oxide skin, rusty stain, carry out roughening treatment after qualified, make surface roughness reach 1.6 ~ 6.3 μm with No. 600 sand papering piece surfaces; Face of not spraying paint protected by use adhesive tape;
2) mixed solvent is prepared with aero-washing gasoline and ethanol with volume ratio 2:1, cleaning components surface; Dipping in solvent wiping piece surface with white silk, is qualified without dirt; Qualifiedly be placed on dry 60min in 50 DEG C of baking ovens, naturally cool to room temperature;
3) spray epoxy primer EP506, spray 4 times, after hanging 120min, be placed in 50 DEG C of dry 1.5h of baking oven in chiasma type, controlling build is 70 ~ 100 μm;
4) use No. 600 sand papering epoxy primer lacquer paintings, spray fluorine carbon finishing paint afterwards, spray 2 times, after hanging 60min in chiasma type, be placed in 50 DEG C of dry 3h of baking oven, controlling build is 30 ~ 50 μm; To dismantle after qualified protection sheet, Assembly of the parts is formed assembly;
5) position of being sprayed paint by assembly is smooth with No. 800 sand paperings, protects position of not spraying paint; Use step 2) mixed solvent Wipe assembly to spray paint position, dipping in solvent wiping coating surface with white silk, is qualified without dirt; Spray fluorine carbon finishing paint afterwards, first spray minor face during spraying, then spray main face, spray gun air pressure is adjusted to 4.0 bar, sprays 2 times, after hanging 60min in chiasma type, is placed in 50 DEG C of dry 3h of baking oven, and controlling build is 30 ~ 50 μm;
6) carve characters and fill out paint, removing coloured enamel remains, and tears protection open, wiped clean, to obtain final product.
Embodiment 3
The assembly method for paint spraying of the enhancing coating adhesion of the present embodiment, part is titanium alloy material, comprises the following steps:
1) detect piece surface and whether have the defects such as scuffing, dirt, oxide skin, rusty stain, carry out roughening treatment after qualified, make surface roughness reach 1.6 ~ 6.3 μm with No. 500 sand papering piece surfaces; Face of not spraying paint protected by use adhesive tape;
2) mixed solvent is prepared with aero-washing gasoline and ethanol with volume ratio 2:1, cleaning components surface; Dipping in solvent wiping piece surface with white silk, is qualified without dirt; Qualifiedly be placed on dry 30min in 50 DEG C of baking ovens, naturally cool to room temperature;
3) spray epoxy primer 725-H06-19, spray 4 times, after hanging 120min, be placed in 50 DEG C of dry 1h of baking oven in chiasma type, controlling build is 70 ~ 100 μm;
4) use No. 600 sand papering epoxy primer lacquer paintings, spray fluorine carbon finishing paint afterwards, spray 2 times, after hanging 60min in chiasma type, be placed in 50 DEG C of dry 2h of baking oven, controlling build is 30 ~ 50 μm; To dismantle after qualified protection sheet, Assembly of the parts is formed assembly;
5) position of being sprayed paint by assembly is smooth with No. 500 sand paperings, protects position of not spraying paint; Use step 2) mixed solvent Wipe assembly to spray paint position, dipping in solvent wiping coating surface with white silk, is qualified without dirt; Spray fluorine carbon finishing paint afterwards, first spray minor face during spraying, then spray main face, spray gun air pressure is adjusted to 3.5 bar, sprays 2 times, after hanging 60min in chiasma type, is placed in 50 DEG C of dry 2h of baking oven, and controlling build is 30 ~ 50 μm;
6) carve characters and fill out paint, removing coloured enamel remains, and tears protection open, wiped clean, to obtain final product.
Test example
By its adhesive force of embodiment 1 ~ 3 gained component detection, damp and hot, salt fog, mould, hot test, low-temperature test performance, result is as shown in table 1.
The performance test results of table 1 embodiment 1 ~ 3 gained assembly
From the result of the test of table 1, be 0 grade by the adhesive force of the inventive method gained assembly, and salt spray resistance, wet-heat resisting, resistance to mould, high temperature resistant, resistance to low temperature is excellent, appearance uniform be consistent, good decorative property; On the basis of coating adhesion, combination property and the outward appearance of assembly are all improved, and meet the airborne circumstance user demand of assembly.
Claims (9)
1. strengthen an assembly method for paint spraying for coating adhesion, it is characterized in that, comprise the following steps:
1) piece surface is carried out roughening treatment, control surface roughness is 1.6 ~ 6.3 μm, rear solvent clean, dry;
2) spray epoxy primer, controlling build is 70 ~ 100 μm;
3) spray fluorine carbon finishing paint, controlling build is 30 ~ 50 μm;
4) after Assembly of the parts being become assembly, position of being sprayed paint by assembly polishes flat, and except crude removal, spraying fluorine carbon finishing paint, controlling build is 30 ~ 50 μm, to obtain final product.
2. the assembly method for paint spraying strengthening coating adhesion as claimed in claim 1, it is characterized in that, described part is aluminium alloy, magnesium alloy or titanium alloy material.
3. the assembly method for paint spraying strengthening coating adhesion as claimed in claim 1, is characterized in that, step 1) in, described roughening treatment is grinding process, and sand paper used of polishing is 360 ~ No. 600.
4. the as claimed in claim 1 assembly method for paint spraying strengthening coating adhesion, is characterized in that, step 1) in, 2:1 is formulated by volume by aero-washing gasoline and ethanol for described solvent.
5. the assembly method for paint spraying strengthening coating adhesion as claimed in claim 1, is characterized in that, step 2) in, epoxy primer is that chiasma type sprays 4 times, after hanging 120min, in 50 DEG C of baking ovens, be incubated 1 ~ 1.5h.
6. the assembly method for paint spraying strengthening coating adhesion as claimed in claim 1, is characterized in that, step 3) in, before spraying fluorine carbon finishing paint, use No. 600 sand paper uniform grinding epoxy primer lacquer paintings.
7. the assembly method for paint spraying strengthening coating adhesion as claimed in claim 1, is characterized in that, step 3) in, fluorine carbon finishing paint is that chiasma type sprays 2 times, after hanging 60min, in 50 DEG C of baking ovens, be incubated 2 ~ 3h.
8. the as claimed in claim 1 assembly method for paint spraying strengthening coating adhesion, is characterized in that, step 4) in, described in the sand paper used that polishes flat be 360 ~ No. 800.
9. the assembly method for paint spraying strengthening coating adhesion as claimed in claim 1, is characterized in that, step 4) in, fluorine carbon finishing paint is that chiasma type sprays 2 times, after hanging 60min, in 50 DEG C of baking ovens, be incubated 2 ~ 3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510901430.5A CN105521930A (en) | 2015-12-08 | 2015-12-08 | Assembly painting method for improving coating adhesion force |
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| CN201510901430.5A CN105521930A (en) | 2015-12-08 | 2015-12-08 | Assembly painting method for improving coating adhesion force |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351575A (en) * | 2018-10-11 | 2019-02-19 | 南京固航综显电子科技有限公司 | A kind of light guide plate spraying process |
| CN110193455A (en) * | 2019-04-16 | 2019-09-03 | 平高集团有限公司 | A kind of coating process of bellows component used for high-voltage switch |
| CN110813670A (en) * | 2019-11-08 | 2020-02-21 | 陕西航空电气有限责任公司 | Method for improving paint spraying quality of aviation ignition cable surface |
| CN115025955A (en) * | 2022-06-06 | 2022-09-09 | 南通市海洋水建工程有限公司 | Process for improving coating quality of steel structure foundation of offshore booster station |
| CN115889139A (en) * | 2022-11-18 | 2023-04-04 | 陕西华燕航空仪表有限公司 | Surface composite coating for improving humidity resistance, heat resistance and corrosion resistance of magnesium alloy |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351575A (en) * | 2018-10-11 | 2019-02-19 | 南京固航综显电子科技有限公司 | A kind of light guide plate spraying process |
| CN110193455A (en) * | 2019-04-16 | 2019-09-03 | 平高集团有限公司 | A kind of coating process of bellows component used for high-voltage switch |
| CN110813670A (en) * | 2019-11-08 | 2020-02-21 | 陕西航空电气有限责任公司 | Method for improving paint spraying quality of aviation ignition cable surface |
| CN115025955A (en) * | 2022-06-06 | 2022-09-09 | 南通市海洋水建工程有限公司 | Process for improving coating quality of steel structure foundation of offshore booster station |
| CN115889139A (en) * | 2022-11-18 | 2023-04-04 | 陕西华燕航空仪表有限公司 | Surface composite coating for improving humidity resistance, heat resistance and corrosion resistance of magnesium alloy |
| CN115889139B (en) * | 2022-11-18 | 2024-03-19 | 陕西华燕航空仪表有限公司 | Surface composite coating for improving humidity and heat resistance and corrosion resistance of magnesium alloy |
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