CN1286146A - Anticorrosion process for metallic surface - Google Patents
Anticorrosion process for metallic surface Download PDFInfo
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- CN1286146A CN1286146A CN 00116102 CN00116102A CN1286146A CN 1286146 A CN1286146 A CN 1286146A CN 00116102 CN00116102 CN 00116102 CN 00116102 A CN00116102 A CN 00116102A CN 1286146 A CN1286146 A CN 1286146A
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Abstract
An anticorrosion method for protecting metal surface of birdge or railway railing includes spraying a layer of unsaturated polyester resin, wrapping glass fibre cloth, spraying the second layer of unsaturated polyester resin, and repeating said steps 2-4 times. Same type of unsaturated polyester resin but having different characteristics are used. The intiator, ultraviolet absorbent, antiageing agent and discomposer are added to the unsaturated polyester resin.
Description
The present invention relates to metallic surface atmospheric environment medium long-effective corrosion means of defence, relate in particular to the surface that the Bridge Steel tubular construction is exposed in the atmospheric medium and carry out the method that long-effective corrosion protects.
The treatment process that prior art is general is to carry out oil paint coating, spray zinc, aluminium-plated, aluminium-plated magnesium alloy, spray aluminium zinc at metal material surface, is an application notion, and coat-thickness is not more than 150um, can't guarantee to reach the long-effective corrosion protection effect.
Prior art Chinese patent application number: 92108015, denomination of invention: a kind of means of defence of main cable of suspension bridge, use bituminous composition, glass wool cloth, lagging material, woven wire parcel etc., complex process is not attractive in appearance.
The object of the present invention is to provide a kind of metal construction that makes not to be corroded, the anticorrosion process for metallic surface that prolongs the work-ing life of metallic substance.
Anticorrosion process for metallic surface of the present invention, form three-decker in the metallic surface: the first layer is a sealing coat, and the second layer is an enhancement Layer, and the 3rd layer is weathering layer, comprises the steps:
A: the pre-treatment to the metallic surface comprises: eliminate rust with mechanical means, wash with alkaline detergent solution, wash washings and dry moisture content with clear water, handle the crator of burr, overlap or the higher projection of steel surface, polish flat, before spraying the first layer sealing coat, blow most surperficial floating dust with pressurized air;
B: add initiator in the metallic surface with the macromolecular material unsaturated polyester resin and spray one deck coating, be called sealing coat: the material therefor title: add initiator in the unsaturated polyester resin, the unsaturated polyester resin general formula of molecular structure:
R1 represents dibasic alcohol in the formula, and R2 represents unsaturated dibasic acid, and R3 represents monounsaturated dicarboxylic acid;
Add initiator: the solution of methylethyl ketone peroxide and dioctyl phthalate (DOP), methylethyl ketone peroxide, molecular structural formula is:
Prepare initiator in advance, weight proportion is: methylethyl ketone peroxide accounts for 45%-55%, and surplus is a dioctyl phthalate (DOP), and total amount is 100%;
During site operation, add the initiator for preparing in unsaturated polyester resin, the initiator content weight percent is the scope of the 2.0%-2.5% of unsaturated polyester resin weight.
C, layer material to be isolated are cured to surfaces of tacky, when forming continuous film, carry out the injection of intensity layer immediately and make, first layer overlay glasscloth and sturdy, it is identical with insolated layer materials to spray material therefor, for adding initiator in the unsaturated polyester resin, bubble is eliminated in penetration after spraying one deck, then, and by repave the last layer glasscloth with quadrat method, spray again, alternately repeat 2-4 time.
D, carry out the spray of weathering layer, material therefor comprises: in unsaturated polyester resin, add combined uv absorption agent, anti-aging agent, decomposition agent and initiator,
The combined uv absorption agent is two kinds:
The 2-hydroxy benzophenone, molecular structure is:
2,2 '-dihydroxyl-4,4 '-dimethoxy benzophenone,
Molecular structure is:
The chemical name of anti-aging agent is: triphenyl phosphite,
Molecular structure is:
The chemical name of decomposition agent is: N, and N-dimethylamino thionothiolic acid zinc,
Molecular structure is:
The weight proportion of combined uv absorption agent is: the 2-hydroxy benzophenone accounts for the 45%-55% of the gross weight of combined uv absorption agent, and surplus is 2,2 '-dihydroxyl-4,4 '-dimethoxy benzophenone; Combined uv absorption agent add-on is 5 ‰ of a unsaturated polyester resin weight-10 ‰; The anti-aging agent add-on is 2 ‰ of a unsaturated polyester resin weight-4 ‰; The decomposition agent add-on is 4 ‰ of a unsaturated polyester resin weight-6 ‰; The initiator add-on is for being the 2%-2.5% of unsaturated polyester resin and combined uv absorption agent, anti-aging agent, decomposition agent weight sum gross weight:
Separation layer thickness is between the 0.3-0.5mm; When making the intensity layer, be 30-50mm with the lap width that overlaps each other between two glasscloths between one deck, intensity layer total thickness is controlled between the 0.5-0.8mm, and glasscloth is selected the roving woven roving for use; The thickness of weathering layer is between the 0.5mm-0.8mm, when spraying weathering layer, can add pigment in unsaturated polyester resin and mix colours.
The protection principle:
The first layer: sealing coat, also claim confined layer, sealing coat is injected in the metallic surface with adding initiator with the macromolecular material unsaturated polyester resin, with the metallic surface interlock, decomposition of initiator produces free radical, cause unsaturated double-bond in the unsaturated polyester resin thread-like molecule chain and crosslinking styrene generation free radical chain reactions and form netted build macromole, form barrier film in the metallic surface---owing to participate in reaction as linking agent as the vinylbenzene of solvent during at film-forming in the liquid resin, there is not the solvent evaporates phenomenon, form barrier film, this barrier film can be thought a huge molecule with following structural unit:
Thereby it has the feature of compactness, barrier property.Side group in the molecular chain-OH base is to have strong polar functional group; and has strong avidity between the metallic substance polarity interface; steel tube surface is comparatively coarse in addition, and the avidity interfacial area is greatly increased, thereby realizes the adhesiving effect between sealing coat and protected surface.Can effectively media such as airborne oxygen, water and corrosive gases and metallic surface be kept apart, make the metallic surface exempt from erosion medium resistance.
The second layer, intensity layer are a kind of high strength fibre-glass fibre enhanced thermoset macromolecule materials, and its body material and the first layer use the identical initiator material that adds in unsaturated polyester resin.The specific tenacity of intensity layer is than high-quality steel height, and tensile strength can reach more than the 180Mpa, and flexural strength can reach 200Mpa, and intensity layer and sealing coat and weather-proof interlaminal tensile strength can reach more than the 60Mpa; The continuous overlap joint lining of intensity layer makes and is wholely formed the system that high strength is tightly wrapped up sealing coat that has of an integral body by the protection workpiece surface, and the direct infringement that the sealing coat that protective effect is played in the metallic surface is not subjected to external force is lived in the efficiently and effectively protection.
The 3rd layer: the weathering layer material therefor is that a kind of and sealing coat and intensity layer body material are with a series of thermoset macromolecule materials; its curing mechanism is identical; but since introduced radical protections such as more side alkyl and large space sterically hindered aryl in the molecular structure be subject in the molecular chain erosion medium resistance such as acid, water, salt as COO-, group such as C-O and possess stronger acidproof, water-fast, salt resistant character.
Simultaneously, add UV light absorber, anti-aging agent, decomposition agent in the weathering layer material.
UV light absorber 2-hydroxy benzophenone and 2; 2 '-dihydroxyl-4; 4 '-dimethoxy benzophenone; can effectively absorb the ultraviolet ray of 2900 -4000 wavelength region; effectively C-O and C=O etc. easily are damaged and the chemical bond that ruptures in the protection weathering layer material molecule chain, have solved weathering layer photoaging problem.
Anti-aging agent, i.e. oxidation inhibitor can make in the resinous molecular structure that the effect owing to oxygen in the air and ozone causes, and the oxidative degradation free radical chain reactions that has taken place stops and eliminates the effect of oxygen and ozone.
Decomposition agent is the auxiliary agent that a kind of peroxidation group that resin is produced by airborne oxygen and ozone oxidation effect degraded back decomposes, thereby the oxidative degradation free radical chain reactions is interrupted, and the protection resinous molecular structure exempts from the destruction of oxygen and ozone medium in the air.
During construction, three layers of used unsaturated polyester resin of this guard technology are when adding initiator curing, thermopositive reaction takes place, because molecular structure shrinks volume by the variation that linearity is converted into netted build, volumetric shrinkage is at 6%-8%, and this shrinkage makes protective layer tightly be wrapped in steel tube surface and can slippage.
Because the macromolecular material that this guard technology three layers (sealing coat, intensity layer and weathering layer) is connected as a single entity is a kind of netted build structural molecule after solidifying, at the C-C of low temperature in-50 ℃ of following molecular chains, C-O, the C=O key also is unlikely to fracture, simultaneously, because thermoset macromolecule material, can deliquescing under 100 ℃ high temperature yet, three layers have the linear expansivity (1.5 * 10 close with carbon steel in addition
-5/ ℃), during temperature variation, expand with heat and contract with cold and unlikely peeling off with steel.So the present invention can adapt to natural temperature and change and play effective protective effect to steel surface.
The invention has the advantages that:
1, easy construction need not the high pressure sandblast, eliminates rust, makes operations such as hair.
2, adopt special-purpose spraying machine spraying application, the operating efficiency height, between sealing coat and steel adhere closely in the interface, and curing molding speed is fast, and do not have obvious requirement at 40-60 minute to construction environment general every layer of set time.
3, acid rain, corrosion damp and hot, the salt fog medium had the very strong effect of resisting.
4, the three-layer protection layer has intensity, and the security of steel construction is had certain compensating action.
5, have excellent electric insulation functions, can satisfy steel tube surface and set up power supply, and non-conductive, therefore, make things convenient on bridge, the buildings and set up set lights.
6, can adjust color easily according to Construction Party's requirement at weathering layer.
Description of drawings: Fig. 1: the coating cross-section structure after anticorrosion process for metallic surface of the present invention is handled.
Fig. 2: the plane local structure figure of the coating after anticorrosion process for metallic surface of the present invention is handled.
Embodiment 1: the first layer is that sealing coat 1 second layer is that enhancement Layer 2 is weathering layer 3 for the 3rd layer,
Anticorrosion process for metallic surface comprises the steps:
A: the pre-treatment to the metallic surface comprises: eliminate rust with mechanical means, wash with alkaline detergent solution, wash washings and dry moisture content with clear water, handle the crator of burr, overlap or the higher projection of steel surface, polish flat, before spraying the first layer sealing coat, blow most surperficial floating dust with pressurized air;
B: add initiator in the metallic surface with the macromolecular material unsaturated polyester resin and spray one deck coating, be called sealing coat, the material therefor title: add initiator in the unsaturated polyester resin,
Prepare initiator in advance, the solution of methylethyl ketone peroxide and dioctyl phthalate (DOP), weight proportion is: methylethyl ketone peroxide accounts for 45%-55%, and surplus is a dioctyl phthalate (DOP), and total amount is 100%;
During site operation, add the initiator for preparing in unsaturated polyester resin, the initiator content weight percent is the scope of the 2.0%-2.5% of unsaturated polyester resin weight.Separation layer thickness is between the 0.3-0.5mm.Decide according to on-the-spot weather condition, the time of watering is 30-50 minute with fixed attention under the normal temperature.
C, layer material to be isolated is cured to surfaces of tacky, when forming continuous film, carrying out the injection of intensity layer immediately makes, elder generation's layer overlay glasscloth and sturdy, it is identical with insolated layer materials to spray material therefor, for adding initiator in the unsaturated polyester resin, bubble is eliminated in penetration after spraying one deck, then, by repave the last layer glasscloth with quadrat method, spray again, alternately repeat 2-4 time, when making the intensity layer, with the lap width that overlaps each other between two glasscloths between one deck is 30-50mm, lap position between the two-layer 150-200mm that will stagger, intensity layer total thickness is controlled between the 0.5-0.8mm, and glasscloth is selected the roving woven roving for use; Decide according to on-the-spot weather condition, intensity layer total Production Time is 30-60 minute.
D, carry out the spray of weathering layer, material therefor comprises: in unsaturated polyester resin, add combined uv absorption agent, anti-aging agent, decomposition agent and initiator,
The combined uv absorption agent is two kinds: the 2-hydroxy benzophenone, and with 2,2 '-dihydroxyl-4,4 '-dimethoxy benzophenone; The chemical name of anti-aging agent is: triphenyl phosphite, and the chemical name of decomposition agent is: X, N-dimethylamino thionothiolic acid zinc,
The weight proportion of combined uv absorption agent is: 2-hydroxy benzophenone and 2, and 2 '-dihydroxyl-4, the part by weight of 4 '-dimethoxy benzophenone is 45%-55%: 45%-55%; Combined uv absorption agent add-on is 5 ‰ of a unsaturated polyester resin weight-10 ‰; The anti-aging agent add-on is 2 ‰ of a unsaturated polyester resin weight-4 ‰; The decomposition agent add-on is 4 ‰ of a unsaturated polyester resin weight-6 ‰; Mix in the stand-by solution at above-mentioned unsaturated polyester resin and combined uv absorption agent, anti-aging agent, decomposition agent, during construction, could add initiator, the initiator add-on is the 2%-2.5% of the solution weight sum gross weight of unsaturated polyester resin and combined uv absorption agent, anti-aging agent, decomposition agent; The thickness of weathering layer is between the 0.5mm-0.8mm, when spraying weathering layer, can add pigment in unsaturated polyester resin and mix colours.The time of watering is 30-60 minute with fixed attention to decide weathering layer according to on-the-spot weather condition.
Used spraying equipment is that LPAS/SP85,3WP, 2WP, G2, G3 send out and be equipped with for U.S.'s air helps the model of stream containing technology (AAC) in the above-mentioned steps.
Embodiment 2: the spray technology step identical with embodiment 1, with the concrete grammar of material formula:
Prepare initiator in advance, the solution of methylethyl ketone peroxide and dioctyl phthalate (DOP), weight proportion is: methylethyl ketone peroxide accounts for 55 grams, and dioctyl phthalate (DOP) is 45 grams, and total amount is 100 grams; It is stand-by to mix the back initiator.
The sealing coat materials: during site operation, in unsaturated polyester resin, add the initiator for preparing, initiator 20 grams, unsaturated polyester resin 1000 grams mix.At any time prepare with the time spent.
The material of the used unsaturated polyester resin of intensity layer, initiator is identical with matching method and sealing coat.The layer overlay glasscloth sprays again, alternately repeats 2 times,
The weathering layer batching:
The weight proportion of combined uv absorption agent is: 2-hydroxy benzophenone 55 grams, and 2,2 '-dihydroxyl-4,4 '-dimethoxy benzophenone, 45 grams, stand-by after mixing,
Weighing combined uv absorption agent 5 grams; Anti-aging agent add-on 2 grams; Decomposition agent add-on 4 grams; Unsaturated polyester resin 1000 grams; Mix stand-byly at above-mentioned unsaturated polyester resin and combined uv absorption agent, anti-aging agent, decomposition agent, during construction, could add initiator.During construction, above-mentioned unsaturated polyester resin and combined uv absorption agent, anti-aging agent, decomposition agent are mixed stand-by solution weighing 1000 grams, add 20 gram initiators, mix, the material that weathering layer is used is promptly prepared and is finished.
Separation layer thickness is between the 0.3-0.5mm.Decide according to on-the-spot weather condition, the time of watering is 40 minutes-50 minutes with fixed attention under the normal temperature;
The intensity layer waters with fixed attention continuously and sprayed 30-60 minute.Thickness is between the 0.5-0.6mm.
Weathering layer thickness is between the 0.5-0.7mm, and the time of watering is 30-60 minute with fixed attention;
Embodiment 3: the spray technology step identical with embodiment 1 arranged, with the concrete grammar of material formula:
Prepare initiator in advance, the solution of methylethyl ketone peroxide and dioctyl phthalate (DOP), weight proportion is: methylethyl ketone peroxide accounts for 45 grams, and dioctyl phthalate (DOP) is 55 grams, and total amount is 100 grams; It is stand-by to mix the back initiator.
The sealing coat materials: during site operation, in unsaturated polyester resin, add the initiator for preparing, initiator 25 grams, unsaturated polyester resin 1000 grams mix.At any time prepare with the time spent.
The weathering layer batching:
The weight proportion of combined uv absorption agent is: 2-hydroxy benzophenone 45 grams, and 2,2 '-dihydroxyl-4,4 '-dimethoxy benzophenone, 55 grams, stand-by after mixing,
Combined uv absorption agent 10 grams; Anti-aging agent 4 grams; Decomposition agent 6 grams; Unsaturated polyester resin 1000 grams; Mix stand-by at above-mentioned unsaturated polyester resin and combined uv absorption agent, anti-aging agent, decomposition agent, during construction, above-mentioned unsaturated polyester resin and combined uv absorption agent, anti-aging agent, decomposition agent are mixed stand-by solution weighing 1000 grams, add 25 gram initiators.
By Shenyang Branch of Chinese Academy of Sciences physical and chemical testing central metal corrosion and protection test department, test metallic substance being handled latter made anti-corrosion of metal test specimen (GCM) with method of the present invention, as follows:
The acetic acid salt spray corrosion test: the instrument that uses is tested according to GB10125-88 as the ST-ISO-3 type salt spray testing machine that Japan makes, and test conditions is: the temperature of proofing box is 35 ± 1 ℃, and the air saturation actuator temperature is 47 ± ℃, every 80cm
2Spray amount is 1.4-1.8mL/h, and spray pressure is 1 ± 0.025Kgf/cm
2, testing liquid is 5% sodium-chlor, adds a certain amount of chemical pure glacial acetic acid of GB676 that meets, control solution pH value is in the 3.0-3.3 scope.In test in 720 hours, obvious corrosion and variable color do not take place in anti-corrosion of metal test specimen (GCM), and macula lutea appearred in 310 hours in contrast sheet galvanized workpiece, and macula lutea appearred in 650 hours in aluminium-plated of contrast sheet heat.
Damp and hot corrosion test: the instrument that uses is tested with reference to ISO 7384-86 as the GS-3C type corrosion testing machine that Japan makes, and test conditions is: the temperature of proofing box is 45 ± 1 ℃, and relative humidity is more than 95%.Through test in 720 hours, anti-corrosion of metal test specimen (GCM) did not corrode and metachromatism substantially, and a small amount of white corrosion thing appears in contrast sheet galvanized workpiece, and aluminium-plated of contrast piece heat has minute quantity white corrosion thing.
Conclusion is: the anti-acetic acid salt spray of anti-corrosion of metal test specimen (GCM) and damp and hot corrosive nature obviously are better than heat aluminium-plated and galvanized workpiece; can infer; anti-corrosion of metal layer after method of the present invention is handled metallic substance; in the physical environment of similar test conditions, use, can play a good protection the matrix steel.
Claims (3)
1, anticorrosion process for metallic surface comprises the steps:
A: the pre-treatment to the metallic surface comprises: eliminate rust with mechanical means, wash with alkaline detergent solution, wash washings and dry moisture content with clear water, handle the crator of burr, overlap or the higher projection of steel surface, polish flat, before spraying the first layer sealing coat, blow most surperficial floating dust with pressurized air;
B: add initiator in the metallic surface with the macromolecular material unsaturated polyester resin and spray one deck coating, be called sealing coat, the material therefor title: add initiator in the unsaturated polyester resin,
Add initiator: the solution of methylethyl ketone peroxide and dioctyl phthalate (DOP),
Prepare initiator in advance, weight proportion is: methylethyl ketone peroxide accounts for 45%-55%, and surplus is a dioctyl phthalate (DOP), and total amount is 100%;
During site operation, add the initiator for preparing in unsaturated polyester resin, the initiator content weight percent is the scope of the 2.0%-2.5% of unsaturated polyester resin weight, and the time of watering is 30-50 minute with fixed attention under the normal temperature;
C, layer material to be isolated are cured to surfaces of tacky, when forming continuous film, carry out the injection of intensity layer immediately and make first layer overlay glasscloth and sturdy, it is identical with insolated layer materials to spray material therefor, for adding initiator in the unsaturated polyester resin, bubble is eliminated in penetration behind injection one deck, then, by repave the last layer glasscloth with quadrat method, spray, alternately repeat 2-4 time, total Production Time is 30-60 minute under the normal temperature;
D, carry out the spray of weathering layer, material therefor comprises: in unsaturated polyester resin, add combined uv absorption agent, anti-aging agent, decomposition agent and initiator,
The combined uv absorption agent is two kinds:
2-hydroxy benzophenone and 2,2 '-dihydroxyl-4,4 '-dimethoxy benzophenone,
The chemical name of anti-aging agent is: triphenyl phosphite,
The chemical name of decomposition agent is: N, and N-dimethylamino thionothiolic acid zinc,
The weight proportion of combined uv absorption agent is: the 2-hydroxy benzophenone accounts for the 45%-55% of the gross weight of combined uv absorption agent, and surplus is 2,2 '-dihydroxyl-4,4 '-dimethoxy benzophenone; Combined uv absorption agent add-on is 5 ‰ of a unsaturated polyester resin weight-10 ‰; The anti-aging agent add-on is 2 ‰ of a unsaturated polyester resin weight-4 ‰; The decomposition agent add-on is 4 ‰ of a unsaturated polyester resin weight-6 ‰; The initiator add-on is for being the 2%-2.5% of unsaturated polyester resin and combined uv absorption agent, anti-aging agent, decomposition agent weight sum gross weight; The time of watering is 30-60 minute with fixed attention under the normal temperature after the spray.
2, anticorrosion process for metallic surface according to claim 1, its feature comprises: separation layer thickness is between the 0.3-0.5mm; When making the intensity layer, be 30-50mm with the lap width that overlaps each other between two glasscloths between one deck, intensity layer total thickness is controlled between the 0.5-0.8mm, and glasscloth is selected the roving woven roving for use; The thickness of weathering layer is between the 0.5mm-0.8mm, when spraying weathering layer, can add pigment in unsaturated polyester resin and mix colours.
3, anticorrosion process for metallic surface according to claim 1 and 2, its feature comprises: spraying equipment used in the above-mentioned steps is LPAS/SP85,3WP, 2WP, G2, G3 equipment for U.S.'s air helps stream containing technology (AAC) model.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00116102A CN1111099C (en) | 2000-09-25 | 2000-09-25 | Anticorrosion process for metallic surface |
Applications Claiming Priority (1)
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| CN00116102A CN1111099C (en) | 2000-09-25 | 2000-09-25 | Anticorrosion process for metallic surface |
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| CN1286146A true CN1286146A (en) | 2001-03-07 |
| CN1111099C CN1111099C (en) | 2003-06-11 |
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| CN00116102A Expired - Fee Related CN1111099C (en) | 2000-09-25 | 2000-09-25 | Anticorrosion process for metallic surface |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102729551A (en) * | 2012-05-30 | 2012-10-17 | 武汉博奇环保科技股份有限公司 | Polyfluorine cross-linked vinyl ester composite material |
| CN103567832A (en) * | 2013-11-01 | 2014-02-12 | 安徽金诚复合材料有限公司 | Method for smoothing inner wall of GRP (glass reinforced plastic) |
| CN104385716A (en) * | 2014-10-30 | 2015-03-04 | 苏州莱特复合材料有限公司 | Metal resin composite material and preparing method thereof |
| CN109701853A (en) * | 2018-12-21 | 2019-05-03 | 莱州伟辰汽车配件有限公司 | A kind of method for anticorrosion treatment of anticorrosive brake disc |
| CN110576671A (en) * | 2019-07-19 | 2019-12-17 | 中国人民解放军海军航空大学青岛校区 | metal structure corrosion protection and reinforcement method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1003073B (en) * | 1987-01-22 | 1989-01-18 | 江苏省节能技术服务中心 | Aluminium-glass fibre reinforced plastic outer protector composite |
| CN1030475C (en) * | 1992-01-21 | 1995-12-06 | 四川省交通厅公路规划勘察设计院 | Method for protecting main cable of suspension bridge |
-
2000
- 2000-09-25 CN CN00116102A patent/CN1111099C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102729551A (en) * | 2012-05-30 | 2012-10-17 | 武汉博奇环保科技股份有限公司 | Polyfluorine cross-linked vinyl ester composite material |
| CN103567832A (en) * | 2013-11-01 | 2014-02-12 | 安徽金诚复合材料有限公司 | Method for smoothing inner wall of GRP (glass reinforced plastic) |
| CN104385716A (en) * | 2014-10-30 | 2015-03-04 | 苏州莱特复合材料有限公司 | Metal resin composite material and preparing method thereof |
| CN104385716B (en) * | 2014-10-30 | 2017-03-22 | 广东祥枫水性树脂有限公司 | Metal resin composite material and preparing method thereof |
| CN109701853A (en) * | 2018-12-21 | 2019-05-03 | 莱州伟辰汽车配件有限公司 | A kind of method for anticorrosion treatment of anticorrosive brake disc |
| CN110576671A (en) * | 2019-07-19 | 2019-12-17 | 中国人民解放军海军航空大学青岛校区 | metal structure corrosion protection and reinforcement method |
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|---|---|
| CN1111099C (en) | 2003-06-11 |
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