CN105802350A - Corrosion-resistant composite coating for surface of ship body and preparation method of corrosion-resistant composite coating - Google Patents
Corrosion-resistant composite coating for surface of ship body and preparation method of corrosion-resistant composite coating Download PDFInfo
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- CN105802350A CN105802350A CN201610222080.4A CN201610222080A CN105802350A CN 105802350 A CN105802350 A CN 105802350A CN 201610222080 A CN201610222080 A CN 201610222080A CN 105802350 A CN105802350 A CN 105802350A
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
- C09D109/06—Copolymers with styrene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
The invention discloses a corrosion-resistant composite coating for the surface of a ship body and a preparation method of the corrosion-resistant composite coating. The corrosion-resistant composite coating is prepared from glass fibers, ceramic fibers, zinc stearate, silica, aluminum oxide, zinc oxide, graphite, nano kaolin, butadiene-styrene rubber, polyurethane, toluene diisocynate, molybdenum disulfide, sulphur and polytetrafluoroethylene. The glass fibers, the ceramic fibers and sulphur are subjected to ball milling, thermal treatment in nitrogen, crushing, screening and mixing; zinc stearate, silica, aluminum oxide, nano kaolin, butadiene-styrene rubber, toluene diisocynate and molybdenum disulfide are mixed, heated, subjected to ageing and rotary evaporation, then mixed with deionized water, mixed powder and remaining raw materials, heated and subjected to an ultrasonic reaction, ageing, rotary evaporation, ball milling and vacuum spray drying. The composite coating can effectively improve the wear resistance and the corrosion resistance of the surface of the ship body, reduce corrosion to the surface of the ship body and prolong the service life of the ship body; the preparation method is simple and can be widely used for all parts of the ship body.
Description
Technical field
The present invention relates to coating for watercraft technical field, specifically a kind of corrosion-resistant composite coating for boats and ships body surface and preparation method thereof.
Background technology
Marine ship is in stroke, the good austenitic stainless steel of the corrosion of the complicated and severe such as sea water and sandstone, the spot corrosion of cavity, stress corrosion, Multiphase Flow, its material many selections processing characteristics and corrosion resisting property or ferrite one austenitic duplex rustless steel can be suffered.But, austenitic stainless steel, due to lower hardness, causes that its anti-wear performance and anti-complex environment corrosive nature are poor.Therefore, adopt rational surface engineering technology that boats and ships body surface is carried out intensive treatment, become the key point improving Ship Life.
At present, boats and ships body surface treatment technology means generally include all multi-methods such as laser melting coating, plasma spray/built-up welding, HVOF, nonmetallic coating.But, all there is apparatus expensive in existing processing method, complex process, low conversion rate effect are paid no attention to and thought of the problems such as cost is too high, limits its large-scale promotion application.
It addition, macromolecule nonmetallic coating technology is owing to having the corrosion resistance more excellent than metal coating, in anti-cavitation, also there is certain effect, also progressively in boats and ships body surface protection, obtain Preliminary Applications in recent years.But, existing nonmetallic coating and metallic matrix are mechanical bond, and bond strength is relatively low, and use procedure middle or short term undercoating just comes off.
It is thus desirable to the coating of existing boats and ships body surface is carried out certain improvement, to meet boats and ships being actually needed in use, to extend the life-span of boats and ships body.
Summary of the invention
It is an object of the invention to provide a kind of corrosion-resistant composite coating for boats and ships body surface and preparation method thereof, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme:
A kind of corrosion-resistant composite coating for boats and ships body surface, is prepared from by the raw material of following weight portion: glass fibre 15～17 parts, ceramic fibre 21～25 parts, zinc stearate 17～19 parts, silicon dioxide 21～23 parts, aluminium oxide 30～36 parts, zinc oxide 34～38 parts, 28～30 parts of graphite, nano kaoline 24～28 parts; butadiene-styrene rubber 32～36 parts; polyurethane 18～20 parts, toluene di-isocyanate(TDI) 16～18 parts, molybdenum bisuphide 9～11 parts; 8～10 parts of sulfur, politef 26～30 parts.
The preparation method of a kind of described corrosion-resistant composite coating for boats and ships body surface, specifically comprises the following steps that
(1) glass fibre, ceramic fibre, sulfur are respectively placed in high energy ball mill, grind 8～10h with dehydrated alcohol for ball-milling medium；At 55～65 DEG C of temperature, 6～8h is dried after taking-up；Being placed in nitrogen atmosphere by glass fibre and ceramic fibre, at 200～240 DEG C, heat treatment 2～4h, obtains blocks of solid；Blocks of solid is carried out respectively crushing and screening, is mixed in proportion, obtain 280～300 order mixed-powders；
(2) by zinc stearate, silicon dioxide, aluminium oxide, nano kaoline, butadiene-styrene rubber, toluene diisocyanate and molybdenum bisuphide by proportioning mixing, add the water of 8～12 times of weight portions of mixed material, 8～10h is reacted at 100～120 DEG C, ageing 16～20h, rotated evaporation removes the moisture of 50%, obtains colloidal sol；
(3) colloidal sol is heated to 90～100 DEG C, and add deionized water, mixed-powder is slowly added in colloidal sol, is slowly stirred simultaneously, and it is sequentially added into zinc oxide, polyurethane and politef, by the heating temperatures of mixture to 180～220 DEG C, ultrasonic reaction 6～8h, ageing 12～16h, rotated evaporation removes the moisture of 60%, it is placed in high energy ball mill and grinds 12～16h, vacuum spray drying, to obtain final product.
Compared with prior art, the invention has the beneficial effects as follows: composite coating of the present invention can be effectively improved wearability and the corrosion resistance of boats and ships body surface, thus effectively reducing boats and ships body surface by seawater corrosion, extend the life-span of boats and ships body, and the preparation method of this composite coating is simple, it is easily achieved, can be widely used in all parts of boats and ships body.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiment 1
For the corrosion-resistant composite coating of boats and ships body surface, the raw material of following weight portion it is prepared from: glass fibre 15 parts, ceramic fibre 25 parts, zinc stearate 17 parts, silicon dioxide 23 parts, aluminium oxide 30 parts, zinc oxide 38 parts, 28 parts of graphite, nano kaoline 28 parts; butadiene-styrene rubber 32 parts; polyurethane 20 parts, toluene di-isocyanate(TDI) 16 parts, molybdenum bisuphide 11 parts; 8 parts of sulfur, politef 30 parts.
The preparation process of above-mentioned composite coating is as follows:
(1) glass fibre, ceramic fibre, sulfur are respectively placed in high energy ball mill, grind 8h with dehydrated alcohol for ball-milling medium；At 55 DEG C of temperature, 8h is dried after taking-up；Being placed in nitrogen atmosphere by glass fibre and ceramic fibre, at 200 DEG C, heat treatment 4h, obtains blocks of solid；Blocks of solid is carried out respectively crushing and screening, is mixed in proportion, obtain 280 order mixed-powders；
(2) by zinc stearate, silicon dioxide, aluminium oxide, nano kaoline, butadiene-styrene rubber, toluene diisocyanate and molybdenum bisuphide by proportioning mixing, add the water of 8 times of weight portions of mixed material, at 100 DEG C, react 10h, ageing 20h, rotated evaporation removes the moisture of 50%, obtains colloidal sol；
(3) colloidal sol is heated to 90 DEG C, and add deionized water, mixed-powder is slowly added in colloidal sol, is slowly stirred simultaneously, and it is sequentially added into zinc oxide, polyurethane and politef, by the heating temperatures of mixture to 180 DEG C, ultrasonic reaction 8h, ageing 16h, rotated evaporation removes the moisture of 60%, it is placed in high energy ball mill and grinds 12h, vacuum spray drying, to obtain final product.
Plasma beam cladding technology is adopted to be coated in boats and ships body surface the composite coating of the present invention, its process conditions are: operating current 200A, running voltage 24V, powder sending quantity 40g/min, gun body translational speed 0.2m/min, work hydrogen flowing quantity 2.0L/min, powder feeding hydrogen flowing quantity 3.0L/min, obtain the composite coating that thickness is 180pm；By coating at 800 DEG C of solution treatment 12h, then through 400 DEG C of Ageing Treatment 24h,.
According to GB6383-86 vibratory cavitation test standard, adopt H66025 type ultrasonic magnetostrictive vibration cavitation erosion instrument that obtained composite coating sample is carried out 80h cavitation test, result shows, the cavitation corrosion weight loss rate average out to 0.0024g/h of prepared composite coating, common coating is then 0.0215g/h.Adopting MMW-1A type friction wear testing machine that prepared composite coating is carried out friction-wear test, when identical friction-wear test, the wear extent of composite coating is 0.0040g, and control sample high chromium cast iron material is then 0.0140g.Carrying out 240h neutral salt spray test according to GB/TI0125-2012 standard, it is shown that the salt air corrosion weight loss rate of prepared composite coating sample is 0.0006mm/a, matrix material is then 0.0052mm/a.
Embodiment 2
For the corrosion-resistant composite coating of boats and ships body surface, the raw material of following weight portion it is prepared from: glass fibre 16 parts, ceramic fibre 23 parts, zinc stearate 18 parts, silicon dioxide 22 parts, aluminium oxide 33 parts, zinc oxide 36 parts, 29 parts of graphite, nano kaoline 26 parts; butadiene-styrene rubber 34 parts; polyurethane 19 parts, toluene di-isocyanate(TDI) 17 parts, molybdenum bisuphide 10 parts; 9 parts of sulfur, politef 28 parts.
The preparation process of above-mentioned composite coating is as follows:
(1) glass fibre, ceramic fibre, sulfur are respectively placed in high energy ball mill, grind 9h with dehydrated alcohol for ball-milling medium；At 60 DEG C of temperature, 7h is dried after taking-up；Being placed in nitrogen atmosphere by glass fibre and ceramic fibre, at 220 DEG C, heat treatment 3h, obtains blocks of solid；Blocks of solid is carried out respectively crushing and screening, is mixed in proportion, obtain 290 order mixed-powders；
(2) by zinc stearate, silicon dioxide, aluminium oxide, nano kaoline, butadiene-styrene rubber, toluene diisocyanate and molybdenum bisuphide by proportioning mixing, add the water of 10 times of weight portions of mixed material, at 110 DEG C, react 9h, ageing 18h, rotated evaporation removes the moisture of 50%, obtains colloidal sol；
(3) colloidal sol is heated to 95 DEG C, and add deionized water, mixed-powder is slowly added in colloidal sol, is slowly stirred simultaneously, and it is sequentially added into zinc oxide, polyurethane and politef, by the heating temperatures of mixture to 200 DEG C, ultrasonic reaction 7h, ageing 14h, rotated evaporation removes the moisture of 60%, it is placed in high energy ball mill and grinds 14h, vacuum spray drying, to obtain final product.
Plasma beam cladding technology is adopted to be coated in boats and ships body surface the composite coating of the present invention, its process conditions are: operating current 280A, running voltage 30V, powder sending quantity 45g/min, gun body translational speed 0.35m/min, work hydrogen flowing quantity 2.2L/min, powder feeding hydrogen flowing quantity 4.0L/min, obtain the composite coating that thickness is 250pm；By coating at 850 DEG C of solution treatment 11h, then through 450 DEG C of Ageing Treatment 22h,.
According to GB6383-86 vibratory cavitation test standard, adopt H66025 type ultrasonic magnetostrictive vibration cavitation erosion instrument that obtained composite coating sample is carried out 80h cavitation test, result shows, the cavitation corrosion weight loss rate average out to 0.0020g/h of prepared composite coating, common coating is then 0.0220g/h.Adopting MMW-1A type friction wear testing machine that prepared composite coating is carried out friction-wear test, when identical friction-wear test, the wear extent of composite coating is 0.0036g, and control sample high chromium cast iron material is then 0.0132g.Carrying out 240h neutral salt spray test according to GB/TI0125-2012 standard, it is shown that the salt air corrosion weight loss rate of prepared composite coating sample is 0.0004mm/a, matrix material is then 0.0048mm/a.
Embodiment 3
For the corrosion-resistant composite coating of boats and ships body surface, the raw material of following weight portion it is prepared from: glass fibre 17 parts, ceramic fibre 21 parts, zinc stearate 19 parts, silicon dioxide 21 parts, aluminium oxide 36 parts, zinc oxide 34 parts, 30 parts of graphite, nano kaoline 24 parts; butadiene-styrene rubber 36 parts; polyurethane 18 parts, toluene di-isocyanate(TDI) 18 parts, molybdenum bisuphide 9 parts; 10 parts of sulfur, politef 26 parts.
The preparation process of above-mentioned composite coating is as follows:
(1) glass fibre, ceramic fibre, sulfur are respectively placed in high energy ball mill, grind 10h with dehydrated alcohol for ball-milling medium；At 65 DEG C of temperature, 6h is dried after taking-up；Being placed in nitrogen atmosphere by glass fibre and ceramic fibre, at 240 DEG C, heat treatment 2h, obtains blocks of solid；Blocks of solid is carried out respectively crushing and screening, is mixed in proportion, obtain 300 order mixed-powders；
(2) by zinc stearate, silicon dioxide, aluminium oxide, nano kaoline, butadiene-styrene rubber, toluene diisocyanate and molybdenum bisuphide by proportioning mixing, add the water of 12 times of weight portions of mixed material, at 120 DEG C, react 8h, ageing 16h, rotated evaporation removes the moisture of 50%, obtains colloidal sol；
(3) colloidal sol is heated to 100 DEG C, and add deionized water, mixed-powder is slowly added in colloidal sol, is slowly stirred simultaneously, and it is sequentially added into zinc oxide, polyurethane and politef, by the heating temperatures of mixture to 220 DEG C, ultrasonic reaction 6h, ageing 12h, rotated evaporation removes the moisture of 60%, it is placed in high energy ball mill and grinds 16h, vacuum spray drying, to obtain final product.
Plasma beam cladding technology is adopted to be coated in boats and ships body surface the composite coating of the present invention, its process conditions are: operating current 360A, running voltage 36V, powder sending quantity 50g/min, gun body translational speed 0.5m/min, work hydrogen flowing quantity 2.5L/min, powder feeding hydrogen flowing quantity 5.0L/min, obtain the composite coating that thickness is 320pm；By coating at 900 DEG C of solution treatment 10h, then through 500 DEG C of Ageing Treatment 20h,.
According to GB6383-86 vibratory cavitation test standard, adopt H66025 type ultrasonic magnetostrictive vibration cavitation erosion instrument that obtained composite coating sample is carried out 80h cavitation test, result shows, the cavitation corrosion weight loss rate average out to 0.0032g/h of prepared composite coating, common coating is then 0.0240g/h.Adopting MMW-1A type friction wear testing machine that prepared composite coating is carried out friction-wear test, when identical friction-wear test, the wear extent of composite coating is 0.0045g, and control sample high chromium cast iron material is then 0.0146g.Carrying out 240h neutral salt spray test according to GB/TI0125-2012 standard, it is shown that the salt air corrosion weight loss rate of prepared composite coating sample is 0.0006mm/a, matrix material is then 0.0055mm/a.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when without departing substantially from the spirit of the present invention or basic feature, it is possible to realize the present invention in other specific forms.Therefore, no matter from which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the invention rather than described above limits, it is intended that all changes in the implication of the equivalency dropping on claim and scope included in the present invention.
Claims (2)
1. the corrosion-resistant composite coating for boats and ships body surface, it is characterized in that, it is prepared from by the raw material of following weight portion: glass fibre 15～17 parts, ceramic fibre 21～25 parts, zinc stearate 17～19 parts, silicon dioxide 21～23 parts, aluminium oxide 30～36 parts, zinc oxide 34～38 parts, 28～30 parts of graphite, nano kaoline 24～28 parts, butadiene-styrene rubber 32～36 parts, polyurethane 18～20 parts, toluene di-isocyanate(TDI) 16～18 parts, molybdenum bisuphide 9～11 parts, 8～10 parts of sulfur, politef 26～30 parts.
2. the preparation method of the corrosion-resistant composite coating being used for boats and ships body surface as claimed in claim 1, it is characterised in that specifically comprise the following steps that
(1) glass fibre, ceramic fibre, sulfur are respectively placed in high energy ball mill, grind 8～10h with dehydrated alcohol for ball-milling medium；At 55～65 DEG C of temperature, 6～8h is dried after taking-up；Being placed in nitrogen atmosphere by glass fibre and ceramic fibre, at 200～240 DEG C, heat treatment 2～4h, obtains blocks of solid；Blocks of solid is carried out respectively crushing and screening, is mixed in proportion, obtain 280～300 order mixed-powders；
(2) by zinc stearate, silicon dioxide, aluminium oxide, nano kaoline, butadiene-styrene rubber, toluene diisocyanate and molybdenum bisuphide by proportioning mixing, add the water of 8～12 times of weight portions of mixed material, 8～10h is reacted at 100～120 DEG C, ageing 16～20h, rotated evaporation removes the moisture of 50%, obtains colloidal sol；
(3) colloidal sol is heated to 90～100 DEG C, and add deionized water, mixed-powder is slowly added in colloidal sol, is slowly stirred simultaneously, and it is sequentially added into zinc oxide, polyurethane and politef, by the heating temperatures of mixture to 180～220 DEG C, ultrasonic reaction 6～8h, ageing 12～16h, rotated evaporation removes the moisture of 60%, it is placed in high energy ball mill and grinds 12～16h, vacuum spray drying, to obtain final product.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106497263A (en) * | 2016-11-08 | 2017-03-15 | 江苏润海能源科技有限公司 | A kind of protective layer of the cooling water pipe for sea water desalinating unit |
| CN107502010A (en) * | 2017-09-30 | 2017-12-22 | 浙江瀚镪自动化设备股份有限公司 | A kind of manipulator face coat |
| CN107793888A (en) * | 2017-11-03 | 2018-03-13 | 西南石油大学 | A kind of anti-corrosion nano MoS2The preparation method of RGO epoxy composite coatings |
| CN110294992A (en) * | 2019-06-21 | 2019-10-01 | 中国船舶重工集团公司第七一九研究所 | A kind of corrosion-resistant and high-temperature resistant coating peculiar to vessel and preparation method thereof |
| CN111621180A (en) * | 2020-07-22 | 2020-09-04 | 江苏大使同丰涂料有限公司 | Composite nontoxic marine coating |
| CN116218347A (en) * | 2022-06-24 | 2023-06-06 | 国家电投集团科学技术研究院有限公司 | Cavitation erosion resistant finish paint and preparation method and application thereof |
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| CN104212323A (en) * | 2014-09-18 | 2014-12-17 | 江苏海晟涂料有限公司 | Room-temperature self-setting corrosion protective coating and preparation method thereof |
| CN104403496A (en) * | 2014-11-07 | 2015-03-11 | 中国科学院长春应用化学研究所 | Anticorrosive paint and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106497263A (en) * | 2016-11-08 | 2017-03-15 | 江苏润海能源科技有限公司 | A kind of protective layer of the cooling water pipe for sea water desalinating unit |
| CN107502010A (en) * | 2017-09-30 | 2017-12-22 | 浙江瀚镪自动化设备股份有限公司 | A kind of manipulator face coat |
| CN107793888A (en) * | 2017-11-03 | 2018-03-13 | 西南石油大学 | A kind of anti-corrosion nano MoS2The preparation method of RGO epoxy composite coatings |
| CN110294992A (en) * | 2019-06-21 | 2019-10-01 | 中国船舶重工集团公司第七一九研究所 | A kind of corrosion-resistant and high-temperature resistant coating peculiar to vessel and preparation method thereof |
| CN111621180A (en) * | 2020-07-22 | 2020-09-04 | 江苏大使同丰涂料有限公司 | Composite nontoxic marine coating |
| CN116218347A (en) * | 2022-06-24 | 2023-06-06 | 国家电投集团科学技术研究院有限公司 | Cavitation erosion resistant finish paint and preparation method and application thereof |
| CN116218347B (en) * | 2022-06-24 | 2024-02-06 | 国家电投集团科学技术研究院有限公司 | Cavitation erosion resistant finish paint and preparation method and application thereof |
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Application publication date: 20160727 |