CN109868029A - Organic protection coating for reduction process aluminum alloy surface - Google Patents
Organic protection coating for reduction process aluminum alloy surface Download PDFInfo
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- CN109868029A CN109868029A CN201711255515.6A CN201711255515A CN109868029A CN 109868029 A CN109868029 A CN 109868029A CN 201711255515 A CN201711255515 A CN 201711255515A CN 109868029 A CN109868029 A CN 109868029A
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- epoxy resin
- dimethylbenzene
- butanol
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Abstract
The present invention relates to a kind of normal temperature cure organic protection coating with high adhesion force suitable for Multiple Type reduction process aluminum alloy surface, the coating prepares pretreatment anti-corrosive pulp first, in the mixed solvent is added under stirring in assivation property functional pigment and resin liquid, coupling agent, auxiliary agent, obtains stable slurry.For the normal temperature solidified organic protection coating of reduction process aluminum alloy surface, is formed and be used cooperatively by two component of A, B.Wherein component A mainly includes above-mentioned pretreatment anti-corrosive pulp, further includes epoxy resin liquid, pigments and fillers, auxiliary agent and appropriate solvent, and B component is the mixture of polyamide-based curing agent and dimethylbenzene, n-butanol.The reduction process aluminium alloy special coating prepared by the present invention not only excellent combination property in aluminum substrate also eliminates before traditional coating coating to the complicated cumbersome treatment process of ground, meets energy-saving new trend, have a extensive future.
Description
Technical field:
The invention belongs to special anticorrosive coating fields, in particular to a kind of to be suitable for Multiple Type reduction process aluminum alloy surface
The normal temperature cure organic protection coating with high adhesion force and preparation method thereof.
Background technique:
As the lightweight of various equipments improves, the light metals such as a large amount of high intensity, light aluminum alloy, titanium alloys are used,
Wherein aluminium and aluminium alloy are easy to form one layer of fine and close oxidation film on surface in air, and the oxidation film densification is smooth, to aluminium
Alloy substrate has good protective effect, if but the oxidation film is more easily damaged and electropositive impurity is contained on surface, such as copper, iron
Deng the stability of oxidation film will reduce, and directly influence the service life of material, therefore coat in aluminum alloy surface organic
Coating is a kind of effectively enhancement measures.But aluminum alloy surface oxidation film is easier to adsorbed water molecule so that organic protection coating with
Aluminium alloy base material is difficult to infiltrate, combine, and greatly reduces the adhesive force of coating, and coating easily falls off under external force, is not achieved long-term
Protection effect.
Conventional aluminium alloy special coating the surface treatment of substrate is required it is very strict, require to carry out mostly sandblasting or
Stringent anodic oxidation, chemical oxidation, differential arc oxidation etc. are carried out, technique is cumbersome, and anti-corrosion protection is at high cost.It (is only needed in reduction process
Carry out oil removing ash disposal) coating air drying organic coating is directly carried out on aluminum alloy base material, it is also rarely reported in the market.
CN103642365B discloses a kind of marine aluminium alloy corrosion selfreparing smart coat and preparation method thereof, the coating
Corrosion-resistant reachable 3000h, but need to carry out substrate blasting treatment, and coating layer thickness is 300 microns, on reduction process substrate
Adhesive force and anti-corrosive properties are poor.
Development " corrosion and protection " .2015 of He Yu equality aluminium alloy aqueous polyurethane coating, volume 36 the (the 12nd
Phase), 1146-1149.A kind of the document discloses coating on aluminium alloy adhesive force is up to 12.5MPa, but salt spray resistance only has
500h, anti-corrosion effect is poor, moreover the processing mode of substrate is also not known.
Application study " coatings industry " .2008 of the high adhesion paints such as the king side of staying on track train aluminium alloy, the
Volume 38 (the 8th phase), 1-9.The document discloses a kind of coating, mechanism is that aluminium and aluminium alloy table are driven by amino, hydroxyl etc.
The various gases and hydrone in face, and micropore is occupied, it realizes and adheres to ground.The mechanism and this paper mechanism (capture and decompose water
Molecule) have and distinguishes significantly, the gas and hydrone being driven in the document, especially hydrone mix in the coating, can drop
The compactness of low coating, causes anti-corrosive properties to reduce, and the crucial method adhesive force that pulls open also is not reported.
Summary of the invention
Coating of the present invention is a kind of for polytypic aluminium alloy (such as 7A52,5083,7075,7A04 etc.) table
The two-component corrosion-resistant epoxy paint in face, particularly suitable for reduction process aluminum alloy surface.The coating and common polyurethane coating, third
Olefin(e) acid cold coating is different, also has significant difference with common epoxy resin coating.
Heretofore described reduction process refers to the ash only with the removal aluminum alloy surface such as degreaser, cleaning agent, solvent
The dirts such as dirt, oil, different from means such as traditional sandblasting, shot-peening, manual grinding, polishing, oxidation processes, complexing processing.
One of the solution of the present invention is to provide a kind of pretreatment anti-corrosive pulp.
The pretreatment anti-corrosive pulp is by assivation property functional pigment and resin liquid, coupling agent, auxiliary agent in stirring
Lower addition in the mixed solvent obtains stable slurry, and raw material components by weight percentage is as follows:
The epoxy resin liquid is using bisphenol A type epoxy resin of the molecular weight between 450~1400, dimethylbenzene and just
The mixed liquor that weight solid part that butanol (dimethylbenzene and n-butanol weight ratio 1:0.2~1) is prepared is 60%.
The assivation property functional pigment includes zinc yellow, trbasic zinc phosphate, aluminium triphosphate, zinc oxide, chromate, is chosen
It is one or more of.
The coupling agent is selected from following one or more: BYK4510, BYK4500, A1100, Adherant 1121,
Adherant 1121、Adherant 1051。
The dispersing agent is one of BYK-P104S, BYK-110, hamming this Disponer928, FX9086 or several
Kind；The anti-settling agent is one or more of hamming this DeuRheo229, BENGEL424, BENGEL958, BYK-410.
The pretreatment anti-corrosive pulp, including following preparation process:
The solvent of formula ratio is added in container, is placed under high-speed stirred, sequentially adds dispersing aid, the asphalt mixtures modified by epoxy resin of formula ratio
Rouge liquid, assivation property functional pigment disperse 10~30min, and the coupling agent of formula ratio is added, and disperse 10~30min, add anti-
Heavy agent continues 10~30min of stirring and stable pretreatment anti-corrosive pulp of the viscosity between 100~1000mPa.s is made.
Further, the present invention provides the normal temperature solidified organic protection coating for reduction process aluminum alloy surface, by
A, two component of B is formed and is used cooperatively.
Wherein the feature of component A mainly includes above-mentioned pretreatment anti-corrosive pulp, further include epoxy resin liquid, pigments and fillers,
Auxiliary agent and appropriate solvent.Each component components by weight percentage is as follows:
The epoxy resin liquid is identical as the epoxy resin liquid in pretreatment anti-corrosive pulp formula.
The pigments and fillers include the flake aluminum with shielding action, mica powder and other class pigments and fillers such as talcum powder,
Blanc fixe, calcium carbonate, titanium dioxide etc..
The leveling auxiliary agent is one or more of BYK-306, hamming this Levaslip466；The anti-settling agent is sea
One or more of bright this DeuRheo229, BENGEL424, BENGEL958, BYK-410.
The solvent is the mixed liquor that dimethylbenzene and n-butanol ratio 1:0.2~1 by weight are configured.
B component is the mixture of polyamide-based curing agent and dimethylbenzene, n-butanol.Each component is matched by weight percentage
Than as follows:
The preparation method of normal temperature solidified organic two-component protective coating for reduction process aluminum alloy surface, including
Following steps:
1. stirring container, revolving speed 500- is added by the epoxy resin liquid of the formula ratio, leveling auxiliary agent, solvent
2000r/min, 10-30min is to uniform for stirring；Pretreatment anti-corrosive pulp, pigments and fillers, anti-settling agent are added, revolving speed is in 500-
3000r/min, 10-30min is to evenly dispersed for stirring, is ground to fineness less than 30 microns (if containing in formula using sand mill
Large-size flaky pigment such as shape aluminium powder etc., fineness can be relaxed to 60 microns), strainer filtering, metering packing obtains component A mill base；
2. being mixed and stirred for uniformly by the polyamide curing agent and dimethylbenzene, n-butanol of the formula ratio, strainer filtering, count
Amount packaging, is made B component curing agent.
A, B component is the uniform mixed configuration of 1~10:1 by weight.
The coating method of coating composition of the invention can be brushing, spraying, roll coating process.
Total coating thickness of the invention is controlled at 30~80 μm, and promising result can be obtained.
Substrate surface treatment mode of the invention is the ash that aluminum alloy surface is removed using degreaser, cleaning agent or solvent etc.
The dirts such as dirt, oil.
Pretreatment anti-corrosive pulp prepared by the present invention, so that limited coupling agent and crucial passivation type anti-corrosion paint are effective
In conjunction with can prevent the constitution filler in coating from consuming excessive coupling agent, while being also prevented from anti-corrosion paint and protecting for a long time
The migration unordered in coat inside in the process, it is ensured that the assivation property pigment for playing crucial anti-corrosion function is firmly attached to aluminium base
Material surface layer, to play the efficient antisepsis of assivation property pigment.It is demonstrated experimentally that the epoxy of addition pretreatment anti-corrosive pulp preparation
Anticorrosive paint, resistance to neutral salt spray can be promoted to 3000h, excellent combination property by 1200h on reduction process substrate.
Coating of the invention is added to the coupling agent that hydrolysis can occur with the oxidizing aqueous film of reduction process aluminum alloy surface,
The coupling agent is different from conventional silanes class coupling agents such as traditional KH550, KH560, the coupling agent that the present invention uses, in strand
Organic polymer segment containing longer dimension, improves the flexibility of coupling agent, after film forming also can free extension, to reach
Without characteristics such as flexibility, the shock resistances of loss paint film while promoting coating adhesion.It is demonstrated experimentally that ring prepared by the present invention
The adhesive force of oxygen anticorrosive paint can be improved by 6MPa to 15MPa, impact resistance 50cm, flexibility 1mm, and performance is preferable.
Specific embodiment:
Embodiment is set forth below, and the present invention is described in more detail, but the present invention is not limited solely to these embodiments (below
Described is weight percent).
A kind of embodiment 1: preparation pre-processing anti-corrosive pulp 1
It pre-processes the preparation method of anti-corrosive pulp 1: dimethylbenzene, the n-butanol of formula ratio being added in a reservoir, be placed in high speed
Under stirring, revolving speed 1000r/min sequentially adds BYK-P104S, 60% epoxy, 601 liquid (60% ring of formula ratio
601 liquid of oxygen is that the in the mixed solvent that 601 resin of solids epoxy is added to dimethylbenzene and n-butanol under stirring is prepared into
To), zinc yellow, aluminium triphosphate, disperse 20min, be added the Adherant 1121 of formula ratio, disperse 10min, add anti-
Heavy agent DeuRheo229 continues to stir the obtained yellow, viscous mixture of 30min, and stabilization of the viscosity in 400~500mPa.s is pre-
Handle anti-corrosive pulp 1.
A kind of embodiment 2: preparation of pretreatment anti-corrosive pulp 2
The preparation method of pretreatment anti-corrosive pulp 2 is: dimethylbenzene, the n-butanol of formula ratio being added in a reservoir, is placed in height
Under speed stirring, revolving speed 1500r/min sequentially adds FX9086,60% epoxy, 604 liquid (60% epoxy of formula ratio
604 liquid are that the in the mixed solvent that 604 resin of solids epoxy is added to dimethylbenzene and n-butanol under stirring is prepared into
To), zinc oxide, trbasic zinc phosphate, disperse 15min, be added the Adherant 1051 of formula ratio, disperse 10min, add anti-settling agent
BENGEL958 continues to stir 30min, and thick white shape mixture, stable pretreatment of the viscosity in 600~700mPa.s is made
Anti-corrosive pulp.
Embodiment 3: the preparation of the normal temperature cure organic protection coating (HDD207) for reduction process aluminum alloy surface
The formula composition of component A is as follows:
The preparation method of component A: stirring is added by 60% epoxy, 601 liquid, Levaslip466, solvent of above-mentioned formula ratio
Container, revolving speed stir 20min to uniform at 800r/min；Add pretreatment anti-corrosive pulp 1,996 titanium dioxides, calcium carbonate,
Aluminium powder, DeuRheo229, revolving speed stir 30min to evenly dispersed in 1000r/min, are ground to fineness less than 60 using sand mill
A component mill base is made in micron, strainer filtering, metering packing.
The formula composition of B component is as follows:
B component is made by the polyamide curing agent and the agitated dissolution of dimethylbenzene and n-butanol mixed solvent.
A, B component is by weight 5:1 mixed configuration.
Spraying, brushing or rolling process construction can be used in coating.
Embodiment 4: the preparation of the normal temperature solidified organic protection coating (HDD207-1) for reduction process aluminum alloy surface.
The formula composition of component A is as follows:
The preparation method of component A: it is carried out by the preparation method of component A in embodiment 3.
The formula composition of B component is as follows:
B component is made by the polyamide curing agent and the agitated dissolution of dimethylbenzene and n-butanol mixed solvent.
A, B component is by weight 6:1 mixed configuration.
Spraying, brushing or rolling process construction can be used in coating.
Embodiment 5: the preparation of the normal temperature solidified organic protection coating (HDD207-2) for reduction process aluminum alloy surface.
The formula composition of component A is as follows:
The preparation method of component A is: carrying out by the preparation method of component A in embodiment 3.
The formula composition of B component is as follows:
B component only prepares Preparation Method, carries out according to the preparation method of B component in embodiment 3.
A, B component is by weight 4:1 mixed configuration.
Spraying, brushing or rolling process construction can be used in coating.
Coating prepared by the present invention has following excellent comprehensive performance:
Surface drying (min): 10~60 (GB/T 1728-1979 paint film, putty membrane drying time measuring methods)；
It does solid work (h): 4~48 (GB/T 1728-1979 paint film, putty membrane drying time measuring methods)；
Impact strength (Kg.cm): 50 (GB/T1732-1993 paint film impact resistance measuring methods)；
Flexibility (mm): 1 (GB/T1731-1993 paint film flexibility measuring method)；
Adhesive force (grade): 1 (cross cut test of GB/T9286-1998 paint and varnish paint film)；
Adhesive force (MPa): 5~15 (GB/T 5210-2006 paint and varnish pulls open method adhesion test)；
Resistance to 40 DEG C, 3% salt water: 6 months paint films are without blistering, non-corroding (GB/T1763-79 paint film chemical reagent resistance measurement
Method)；
Wet-heat resisting: 500h, 1 grade (GB/T1740-2007 paint film wet-heat resisting measuring method)；
Resistance to neutral salt spray: 2000-3000h, paint film is not blistering, and unilateral side corrosion diffusion is less than 1mm (GB/T1771-2007 color
The measurement of paint and the resistance to neutral salt spray performance of varnish).
Comparative example 1:
Comparative example 1 is a kind of marine aluminium alloy corrosion selfreparing smart coat disclosed in prior art CN103642365B,
The coating joined fluorine titanium/pick acid doping polypyrrole cladding nanometer silicon dioxide particle as selfreparing component, only work as coating
Its effect of competence exertion when occurring damaged, and when paint film is complete, comparative example 1 does not take reasonable measure to improve to ground
Adhesive force and corrosion resistance.In addition, coating layer thickness needs prepared by comparative example 1 reach at least 300 microns, and need to substrate into
The stringent blasting treatment (roughness Ra >=1.6 μm) of row, resistance to Neutral Salt Spray Corrosion just reachable 3000h, and on reduction process substrate
Adhesive force and anti-corrosive properties do not refer to.
Embodiment composition is as follows:
| Composition | Dosage |
| E-44 epoxy resin | 20 |
| Medium temperature coal tar pitch | 10 |
| Flaky aluminum slurry | 45 |
| Selfreparing component | 15 |
| Polyamide | 7 |
| BYK-410 | 3 |
Comparative example 2: being the comparative example of intentional arrangement of the present invention.
Comparative example 2 is similar to the embodiment of the present invention 3, is a difference in that assivation property functional pigment zinc yellow, trimerization not
Aluminum phosphate is pre-processed, and is formed as follows:
Substrate in experimental performance test of the present invention uses 5083 type aluminium alloys, removes surface grease stain and ash using dimethylbenzene
Dirt, coating are constructed using spraying method, and film thickness is selected as 40 μm, and obtained coating according to national standards test by regulation, real
Apply the main performance index such as table 1 of example and comparative example:
The performance indicator of 1 embodiment and comparative example of table
Comparative example 2 does not carry out coupling agent pretreatment using to zinc yellow, aluminium triphosphate, the coating of preparation in adhesive force and
It is slightly worse in anti-corrosive properties.
As shown in Table 1, embodiment 3,4 and 5 coatings pull open method adhesive force and respectively reach 15MPa, 10MPa, 12MPa, frame
Method adhesive force is 1 grade, is much higher than comparative example 2, has excellent adhesion to reduction process substrate.
In addition, crucial resistance to neutral salt spray index, embodiment 3,4 and 5 respectively reach 3000h, 2500h and 2700h, far
Higher than comparative example 2.In the case where paint film is relatively thin and handles not high to ground, salt fog resistance and comparative example 1 maintain an equal level, and have excellent
Different anti-corrosive properties.
The reduction process aluminium alloy special coating prepared by the present invention not only excellent combination property in aluminum substrate, is also saved
To the complicated cumbersome treatment process of ground before traditional coating coating, meets energy-saving new trend, have a extensive future.
Claims (4)
1. a kind of pretreatment anti-corrosive pulp, raw material components by weight percentage are as follows:
The epoxy resin liquid is using bisphenol A type epoxy resin, dimethylbenzene and n-butanol of the molecular weight between 450~1400
The mixed liquor that weight solid part that (dimethylbenzene and n-butanol weight ratio 1:0.2~1) is prepared is 60%；
The assivation property functional pigment includes zinc yellow, trbasic zinc phosphate, aluminium triphosphate, zinc oxide, chromate, chooses one kind
Or it is several；
The coupling agent be selected from following one or more: BYK4510, BYK4500, A1100, Adherant1121,
Adherant 1121,Adherant 1051；
The pretreatment anti-corrosive pulp, including following preparation process:
The solvent of formula ratio is added in a reservoir, is placed under high-speed stirred, sequentially adds dispersing aid, the epoxy resin of formula ratio
Liquid, assivation property functional pigment disperse 10~30min, and the coupling agent of formula ratio is added, and disperse 10~30min, add anti-settling
Agent continues 10~30min of stirring and stable pretreatment anti-corrosive pulp of the viscosity between 100~1000mPa.s is made.
2. a kind of pretreatment anti-corrosive pulp according to claim 1, when preparing epoxy resin liquid, dimethylbenzene and n-butanol
Weight ratio 1:0.2~1.
3. being used for the normal temperature solidified organic protection coating of reduction process aluminum alloy surface, it is made of two component of A, B, A, B component are pressed
The uniform mixed configuration of 1~10:1 of weight ratio；
Wherein component A components by weight percentage is as follows:
The epoxy resin liquid is identical as the epoxy resin liquid in the pretreatment anti-corrosive pulp formula of claim 1；
The pigments and fillers include the flake aluminum with shielding action, mica powder, talcum powder, blanc fixe, calcium carbonate, titanium
White powder is chosen one or more；
The solvent is the mixed liquor that dimethylbenzene and n-butanol ratio 1:0.2~1 by weight are configured；
B component is the mixture of polyamide-based curing agent and dimethylbenzene, n-butanol, and each component components by weight percentage is such as
Under:
4. the normal temperature solidified organic protection coating according to claim 3 for reduction process aluminum alloy surface, preparation side
Method the following steps are included:
(1) stirring container, revolving speed 500-2000r/ is added by the epoxy resin liquid of the formula ratio, leveling auxiliary agent, solvent
Min, 10-30min is to uniform for stirring；Pretreatment anti-corrosive pulp, pigments and fillers, anti-settling agent are added, revolving speed is in 500-3000r/
Min, 10-30min is to evenly dispersed for stirring, is ground to fineness less than 30 microns using sand mill, strainer filtering, metering packing,
Obtain component A mill base；
(2) it is mixed and stirred for uniformly by the polyamide curing agent of the formula ratio and dimethylbenzene, n-butanol, strainer filtering, metering
B component curing agent is made in packaging；
A, B component is the uniform mixed configuration of 1~10:1 by weight, and coating method can be brushing, spraying, roller coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711255515.6A CN109868029A (en) | 2017-12-04 | 2017-12-04 | Organic protection coating for reduction process aluminum alloy surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711255515.6A CN109868029A (en) | 2017-12-04 | 2017-12-04 | Organic protection coating for reduction process aluminum alloy surface |
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| CN109868029A true CN109868029A (en) | 2019-06-11 |
Family
ID=66914045
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| CN201711255515.6A Pending CN109868029A (en) | 2017-12-04 | 2017-12-04 | Organic protection coating for reduction process aluminum alloy surface |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110437708A (en) * | 2019-07-30 | 2019-11-12 | 中车青岛四方机车车辆股份有限公司 | A kind of aluminium alloy High Performance Corrosion Protective Coatings and its application method |
| CN113151765A (en) * | 2021-03-08 | 2021-07-23 | 常熟科弘材料科技有限公司 | Environment-friendly high-performance coating steel plate and preparation method thereof |
| CN114605854A (en) * | 2022-03-11 | 2022-06-10 | 旭贞新能源科技(上海)有限公司 | Anticorrosive coating with super hydrophobic performance and ultralow surface energy |
| CN115197638A (en) * | 2022-07-27 | 2022-10-18 | 万华化学集团股份有限公司 | Preparation method and application of high-metal-texture, high-weather-resistance and high-corrosion-resistance bi-component air-drying silver paint |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110437708A (en) * | 2019-07-30 | 2019-11-12 | 中车青岛四方机车车辆股份有限公司 | A kind of aluminium alloy High Performance Corrosion Protective Coatings and its application method |
| CN113151765A (en) * | 2021-03-08 | 2021-07-23 | 常熟科弘材料科技有限公司 | Environment-friendly high-performance coating steel plate and preparation method thereof |
| CN114605854A (en) * | 2022-03-11 | 2022-06-10 | 旭贞新能源科技(上海)有限公司 | Anticorrosive coating with super hydrophobic performance and ultralow surface energy |
| CN115197638A (en) * | 2022-07-27 | 2022-10-18 | 万华化学集团股份有限公司 | Preparation method and application of high-metal-texture, high-weather-resistance and high-corrosion-resistance bi-component air-drying silver paint |
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Application publication date: 20190611 |