CN109161300B - Waterborne epoxy anticorrosive paint for ship below waterline and preparation method thereof - Google Patents
Waterborne epoxy anticorrosive paint for ship below waterline and preparation method thereof Download PDFInfo
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- CN109161300B CN109161300B CN201810946199.5A CN201810946199A CN109161300B CN 109161300 B CN109161300 B CN 109161300B CN 201810946199 A CN201810946199 A CN 201810946199A CN 109161300 B CN109161300 B CN 109161300B
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/103—Anti-corrosive paints containing metal dust containing Al
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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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
Abstract
The invention discloses a waterborne epoxy anticorrosive paint used below ship waterline and a preparation method thereof, wherein the waterborne epoxy anticorrosive paint used below the ship waterline comprises the following components in mass ratio of 1:1 a component and a b component; the component A comprises the following components in parts by mass: 50-60 parts of an epoxy curing agent; 0.2-0.5 part of defoaming agent; 70-90 parts of deionized water; 2-4 parts of a rheological agent; 20-30 parts of titanium dioxide; 40-50 parts of aluminum-zinc composite powder; the component B comprises the following components in parts by mass: and 200-240 parts of epoxy resin. The coating has double anticorrosion functions, improves the anticorrosion performance, has low corrosion rate and good waterproof performance in areas below ship waterlines, and has longer service life.
Description
Technical Field
The invention relates to a waterborne epoxy anticorrosive paint used below a ship waterline and a preparation method thereof.
Background
At present, in the marine running process of a steel ship, the area below a ship waterline is soaked in seawater for a long time and is also washed by the seawater, the steel ship can be corroded by various corrosive media, and the stress and the abrasion of the ship can accelerate the corrosion. The corrosion can destroy the structure of the ship, reduce the strength of the ship body, increase the navigation resistance, reduce the navigation speed, influence the performance and the navigation safety and shorten the service life of the ship. When the corrosion reaches a certain degree, the control of the ship during sailing is lost, and even serious marine accident is caused. The corrosion prevention of the area below the ship waterline is a global problem all the time. The data show that the corrosion loss of China reaches at least several billion yuan RMB each year. Therefore, the anti-corrosion work of the ship is not slow. The corrosion prevention measures of the following areas of the ship waterline are mainly two types: physical insulation of the coating and cathodic electrochemical protection. Because of the high cost of electrochemical protection, the physical isolation method of the coating is the most common, and the coating is coated on the bottom of the ship to isolate the contact between seawater and the ship. At present, the coating used below the ship waterline produced in China has the following defects:
(1) the used paint is mainly solvent-based paint, including acrylic acid vinegar, polyurethane vinegar and epoxy anti-corrosion and anti-fouling paint, and contains a large amount of organic solvent which seriously pollutes the environment.
(2) The coating is not compact enough, the waterproof and anti-permeability performance is not good, the adhesive force is poor, the sea water resistance and the impact resistance are not good, and the like.
(3) The corrosion protection effect is not ideal, and the part of the coating contains toxic substances such as lead or chromate and the like, so that the danger of environmental pollution exists in the preparation and use processes.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the waterborne epoxy anticorrosive coating used below the ship waterline, which has double anticorrosive functions and improved anticorrosive performance, and the area below the ship waterline using the coating has low corrosion rate, good waterproof performance and longer service life.
In order to solve the technical problems, the technical scheme of the invention is as follows: the waterborne epoxy anticorrosive paint for the ship below waterline comprises the following components in parts by mass: 1 a component and a b component; wherein the content of the first and second substances,
the component A comprises the following components in parts by mass:
50-60 parts of an epoxy curing agent;
0.2-0.5 part of defoaming agent;
70-90 parts of deionized water;
2-4 parts of a rheological agent;
20-30 parts of titanium dioxide;
40-50 parts of aluminum-zinc composite powder;
the component B comprises the following components in parts by mass:
and 200-240 parts of epoxy resin.
Further, the defoaming agent is a defoaming agent BYK-024.
Further, the rheological agent is rheological agent 1010.
Further, the particle size of the aluminum-zinc composite powder is 2-4 mu m.
Further, the aluminum-zinc composite powder comprises amorphous aluminum-coated crystalline zinc.
Further, the preparation process of the aluminum-zinc composite powder comprises the following steps:
1) adding zinc nanoparticles with purity of more than 99.99% and particle size of 500-800 nm into a solid particle fluidization conveyor of an apposition double-injection deposition molding machine;
2) melting aluminum blocks with the purity of more than 99.99 percent to form aluminum molten metal, and then filling the molten metal into a molten metal bag of an orthotopic double-injection deposition forming machine;
3) introducing high-pressure nitrogen with the air pressure of 0.9-1.2 Mpa into the solid particle fluidized conveyor and the metal liquid bag, and atomizing the aluminum metal liquid and the zinc nanoparticles;
4) and fully mixing the aluminum-zinc nano particles and the aluminum molten metal in the atomizing chamber, depositing the mixture on a substrate, and cooling to obtain the aluminum-zinc composite powder.
The invention also provides a preparation method of the waterborne epoxy anticorrosive paint used below ship waterline, which comprises the following steps:
s1: mixing and stirring deionized water, a defoaming agent, a rheological agent and titanium dioxide according to the mass parts of the components, then ball-milling until the fineness of the slurry is less than 10 mu m, and discharging to obtain slurry;
s2: adding the epoxy curing agent and the aluminum-zinc composite powder into the slurry according to the corresponding mass parts, and stirring to obtain a component A;
s3: during construction, the component A and the component B are mixed and stirred according to the mass ratio of 1:1, and the mixture can be used after being cured.
After the technical scheme is adopted, the water-based epoxy anticorrosive paint for the ship below the waterline forms aluminum-zinc composite powder by coating zinc particles with amorphous-structure aluminum, the aluminum-zinc composite powder is added into the paint A component, the amorphous-structure aluminum does not react with deionized water, the corrosion rate of an outer skin after being soaked in seawater is very low, after the amorphous aluminum of the outer skin is dissolved, the central crystal-structure zinc can also replace iron in a ship body, the double anticorrosive function is achieved, the anticorrosive performance of the coating is improved, the corrosion rate of the area below the ship waterline is low, the waterproof performance is good, and the service life is longer.
Drawings
FIG. 1 is a schematic diagram of a preparation process of an Al-Zn composite powder formed by co-located dual-injection deposition molding according to the present invention; the device comprises 1-nanometer zinc powder, 2-aluminum molten metal, 3-solid particle fluidization conveyor, 4-molten metal bag, 5-closing valve, 6-sealing plug, 7-atomizing chamber, 8-cooler, 9-vent pipe, 10-aluminum-zinc composite powder and 11-substrate.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example one
The waterborne epoxy anticorrosive paint for the ship below waterline comprises the following components in parts by mass: 1 a component and a b component; wherein the content of the first and second substances,
the component A comprises the following components in parts by mass:
50 parts of epoxy curing agent;
0.2 part of defoaming agent;
70 parts of deionized water;
2 parts of a rheological agent;
20 parts of titanium dioxide;
40 parts of aluminum-zinc composite powder;
the component B comprises the following components in parts by mass:
and 200 parts of epoxy resin.
In this embodiment, the epoxy resin may be Araldite® 3961-1。
The epoxy curing agent can be a water-soluble curing agent Aradur®3986, and Araldite 3961-1 epoxy resin are subjected to crosslinking reaction to form a net-structured paint film.
The defoamer can be defoamer BYK-024.
The rheological agent may be rheological agent 1010.
The particle size of the aluminum-zinc composite powder is 2-4 mu m.
The aluminum-zinc composite powder comprises amorphous aluminum-coated crystalline zinc, an amorphous aluminum sheath and 500-800 nm crystalline zinc particles in the center. The coating of the aluminum-zinc composite powder is amorphous aluminum, has no crystal boundary, has strong passivation property and low activity with water, the core crystal structure zinc has high activity, is added into the coating A component and does not react with deionized water, the coating is soaked in seawater, the corrosion rate of the corrosion of the coating is very low, and the core crystal structure zinc can also replace iron in a ship body after the amorphous aluminum of the coating is dissolved.
The preparation process of the orthotopic double-jet deposition-molded aluminum-zinc composite powder is shown in fig. 1, and specifically comprises the following steps:
1) adding zinc nanoparticles with purity of more than 99.99% and particle size of 500-800 nm into a solid particle fluidization conveyor of an apposition double-injection deposition molding machine;
2) melting aluminum blocks with the purity of more than 99.99 percent under the protection of nitrogen atmosphere of a crucible smelting furnace to form aluminum molten metal, and then filling the aluminum molten metal into a molten metal bag of an orthotopic double-injection deposition forming machine;
3) introducing high-pressure nitrogen with the air pressure of 0.9-1.2 Mpa into the solid particle fluidized conveyor and the metal liquid bag, and atomizing the aluminum metal liquid and the zinc nanoparticles;
4) fully mixing aluminum-zinc nano particles and aluminum molten metal in an atomizing chamber, depositing the mixture on a substrate, and cooling to obtain aluminum-zinc composite powder; wherein the deposition distance is 300mm, and the cooling speed is 20 ℃/s.
The preparation method of the waterborne epoxy anticorrosive paint used below the ship waterline comprises the following steps:
s1: adding deionized water, a defoaming agent, a rheological agent and titanium dioxide into a stirrer according to the mass parts of the components, stirring for 10min at a low speed of 200 r/min, adding zirconia beads and glass beads into the stirrer, grinding for 40min at a speed of 1000 r/min, and discharging to obtain slurry after the fineness of the slurry is less than 10 mu m;
s2: adding the epoxy curing agent and the aluminum-zinc composite powder into the slurry according to the corresponding mass parts, and stirring to obtain a component A;
s3: during construction, the component A and the component B are mixed and stirred according to the mass ratio of 1:1, and the mixture can be used after being cured.
Example two
The waterborne epoxy anticorrosive paint for the ship below waterline comprises the following components in parts by mass: 1 a component and a b component; wherein the content of the first and second substances,
the component A comprises the following components in parts by mass:
55 parts of epoxy curing agent;
0.3 part of defoaming agent;
80 parts of deionized water;
3 parts of a rheological agent;
25 parts of titanium dioxide;
45 parts of aluminum-zinc composite powder;
the component B comprises the following components in parts by mass:
and 220 parts of epoxy resin.
In this embodiment, the epoxy resin may be Araldite® 3961-1。
The epoxy curing agent can be a water-soluble curing agent Aradur®3986, and Araldite 3961-1 epoxy resin are subjected to crosslinking reaction to form a net-structured paint film.
The defoamer can be defoamer BYK-024.
The rheological agent may be rheological agent 1010.
The particle size of the aluminum-zinc composite powder is 2-4 mu m.
The aluminum-zinc composite powder comprises amorphous aluminum-coated crystalline zinc, an amorphous aluminum sheath and 500-800 nm crystalline zinc particles in the center. The coating of the aluminum-zinc composite powder is amorphous aluminum, has no crystal boundary, has strong passivation property and low activity with water, the core crystal structure zinc has high activity, is added into the coating A component and does not react with deionized water, the coating is soaked in seawater, the corrosion rate of the corrosion of the coating is very low, and the core crystal structure zinc can also replace iron in a ship body after the amorphous aluminum of the coating is dissolved.
The preparation process of the orthotopic double-jet deposition-molded aluminum-zinc composite powder is shown in fig. 1, and specifically comprises the following steps:
1) adding zinc nanoparticles with purity of more than 99.99% and particle size of 500-800 nm into a solid particle fluidization conveyor of an apposition double-injection deposition molding machine;
2) melting aluminum blocks with the purity of more than 99.99 percent under the protection of nitrogen atmosphere of a crucible smelting furnace to form aluminum molten metal, and then filling the aluminum molten metal into a molten metal bag of an orthotopic double-injection deposition forming machine;
3) introducing high-pressure nitrogen with the air pressure of 0.9-1.2 Mpa into the solid particle fluidized conveyor and the metal liquid bag, and atomizing the aluminum metal liquid and the zinc nanoparticles;
4) fully mixing aluminum-zinc nano particles and aluminum molten metal in an atomizing chamber, depositing the mixture on a substrate, and cooling to obtain aluminum-zinc composite powder; wherein the deposition distance is 300mm, and the cooling speed is 20 ℃/s.
The preparation method of the waterborne epoxy anticorrosive paint used below the ship waterline comprises the following steps:
s1: adding deionized water, a defoaming agent, a rheological agent and titanium dioxide into a stirrer according to the mass parts of the components, stirring for 10min at a low speed of 200 r/min, adding zirconia beads and glass beads into the stirrer, grinding for 40min at a speed of 1000 r/min, and discharging to obtain slurry after the fineness of the slurry is less than 10 mu m;
s2: adding the epoxy curing agent and the aluminum-zinc composite powder into the slurry according to the corresponding mass parts, and stirring to obtain a component A;
s3: during construction, the component A and the component B are mixed and stirred according to the mass ratio of 1:1, and the mixture can be used after being cured.
EXAMPLE III
The waterborne epoxy anticorrosive paint for the ship below waterline comprises the following components in parts by mass: 1 a component and a b component; wherein the content of the first and second substances,
the component A comprises the following components in parts by mass:
60 parts of epoxy curing agent;
00.5 parts of a defoaming agent;
90 parts of deionized water;
4 parts of a rheological agent;
30 parts of titanium dioxide;
50 parts of aluminum-zinc composite powder;
the component B comprises the following components in parts by mass:
and 240 parts of epoxy resin.
In this embodiment, the epoxy resin may be Araldite® 3961-1。
The epoxy curing agent can be a water-soluble curing agent Aradur®3986 andthe epoxy resin is a reticular structure paint film formed by Araldite 3961-1 crosslinking reaction.
The defoamer can be defoamer BYK-024.
The rheological agent may be rheological agent 1010.
The particle size of the aluminum-zinc composite powder is 2-4 mu m.
The aluminum-zinc composite powder comprises amorphous aluminum-coated crystalline zinc, an amorphous aluminum sheath and 500-800 nm crystalline zinc particles in the center. The coating of the aluminum-zinc composite powder is amorphous aluminum, has no crystal boundary, has strong passivation property and low activity with water, the core crystal structure zinc has high activity, is added into the coating A component and does not react with deionized water, the coating is soaked in seawater, the corrosion rate of the corrosion of the coating is very low, and the core crystal structure zinc can also replace iron in a ship body after the amorphous aluminum of the coating is dissolved.
The preparation process of the orthotopic double-jet deposition-molded aluminum-zinc composite powder is shown in fig. 1, and specifically comprises the following steps:
1) adding zinc nanoparticles with purity of more than 99.99% and particle size of 500-800 nm into a solid particle fluidization conveyor of an apposition double-injection deposition molding machine;
2) melting aluminum blocks with the purity of more than 99.99 percent under the protection of nitrogen atmosphere of a crucible smelting furnace to form aluminum molten metal, and then filling the aluminum molten metal into a molten metal bag of an orthotopic double-injection deposition forming machine;
3) introducing high-pressure nitrogen with the air pressure of 0.9-1.2 Mpa into the solid particle fluidized conveyor and the metal liquid bag, and atomizing the aluminum metal liquid and the zinc nanoparticles;
4) fully mixing aluminum-zinc nano particles and aluminum molten metal in an atomizing chamber, depositing the mixture on a substrate, and cooling to obtain aluminum-zinc composite powder; wherein the deposition distance is 300mm, and the cooling speed is 20 ℃/s.
The preparation method of the waterborne epoxy anticorrosive paint used below the ship waterline comprises the following steps:
s1: adding deionized water, a defoaming agent, a rheological agent and titanium dioxide into a stirrer according to the mass parts of the components, stirring for 10min at a low speed of 200 r/min, adding zirconia beads and glass beads into the stirrer, grinding for 40min at a speed of 1000 r/min, and discharging to obtain slurry after the fineness of the slurry is less than 10 mu m;
s2: adding the epoxy curing agent and the aluminum-zinc composite powder into the slurry according to the corresponding mass parts, and stirring to obtain a component A;
s3: during construction, the component A and the component B are mixed and stirred according to the mass ratio of 1:1, and the mixture can be used after being cured.
And detecting the performance indexes of the coating of the waterborne epoxy anticorrosive coating obtained in the first to third embodiments, wherein the performance indexes comprise coating thickness, glossiness, adhesive force, hardness, impact strength, water resistance and salt water resistance. The detection method comprises the following steps:
1) measurement of coating film thickness
According to GB/T13452.2-92, the thickness gauge is used for measuring the thickness of a paint film, the thickness gauge is placed on the surface of a sample plate on the premise that the paint film is completely dried and forms a hard film, the thickness gauge is ensured to be vertical to the gauge, then the dial plate is rotated to enable the measuring range of the thickness gauge to be larger than the thickness of the paint film, a measuring button is pressed, when a gauge head does not rotate any more, the reading is carried out, the same plate is used for measuring three times, then the average value is obtained, the error is not more than +/-2 mu m, and the distance between the test points.
2) Determination of the gloss of a coating film
According to GB 9754-88, after a high-gloss and a low-gloss calibration of the gloss meter, the same plate is read for different points, 3 points are taken with an error of not less than 5 units, and the average is then calculated.
3) Determination of the adhesion of the paint film (scratching test of the paint film)
According to GB/T9286-1998, the plate is placed on a table to ensure that the sample plate does not deform during the experiment. Holding and drawing the check ware, evenly applying force and transversely drawing the mar of a section distance on the model at the uniform velocity, then keeping same dynamics and speed and preceding mar and become 90 and draw a section same distance again, obtain the check matrix, observe the film degree of shedding, if take off too badly, brush the observation effect again with a soft brush along the direction of check matrix line. The same board is tested at different positions at least three times, and if the difference of the results of the three times exceeds a unit grade, the board is invalidated.
4) Measurement of film hardness
The hardness of the paint film is measured according to a GB/T6739-2006 pencil method, according to GB/T13452.2-92, under the condition that the thickness error of the paint film is not large, one pencil of 6B (soft) to 6H (hard) is prepared, a pencil is used for propelling at least 7mm on the surface of the paint film by using a trolley according to the sequence from hard to soft, the damage condition of the paint film is observed, the surface can be lightly rubbed by an eraser for convenient observation, and the hardness of the pencil which cannot damage the surface of the paint film is the hardness of the paint film.
5) Determination of the impact resistance of the paint film (Rapid deformation test)
According to GB/T20624.2-2006, firstly lifting a heavy hammer to the highest height on a guide pipe for fixing, then flatly placing a paint film sample plate on a supporting surface of a base of an experimental device, and releasing the heavy hammer to enable the heavy hammer to freely fall onto a punch under the premise of ensuring that the distance between each impact point and an edge is not less than 15 mm. And (4) raising the weight, taking out the sample plate, observing the sample plate by using a magnifying glass, reducing the height of the weight if the sample plate has obvious cracks, repeating the previous experimental steps until no obvious cracks can be observed for the first time, and recording the impact strength at the moment.
6) Determination of Water resistance of paint film
According to GB/T1733-93, by adopting a soaking experimental method, the sample plates are soaked in distilled water, the sample plates are not adhered to each other, whether the paint film has the phenomena of light loss, whitening, foaming, wrinkling, rusting and the like is observed every day, and if the phenomena occur, the time unit is recorded: and (5) day.
7) Salt water resistance
According to GB/T10834-: and (5) day.
The results of the performance indexes after detection are shown in the following table 1:
TABLE 1
| Detecting project indicators | Example one | Example 2 | Example 3 |
| Thickness of paint film | 100μm | 100μm | 100μm |
| Appearance of coating film | Is flat and smooth | Is flat and smooth | Is flat and smooth |
| Adhesion force, |
2 | 3 | 3 |
| Hardness of | 2H | 3H | 5H |
| Impact resistance, kg cm | 50 | 60 | 80 |
| Water resistance (d) | 900h | 1000h | 1200h |
| Salt water resistance (5% NaCl water solution) | 800h | 900h | 1000h |
| Resistance to salt fog | 1200h | 1500h | 1800h |
The waterborne epoxy anticorrosive paint for the part below the ship waterline, which is prepared by the 3 embodiment methods and multiple experiments, is prepared by coating zinc particles with amorphous-structure aluminum to form aluminum-zinc composite powder, adding the aluminum-zinc composite powder into the paint A component, wherein the amorphous-structure aluminum does not react with deionized water, the corrosion rate of the outer skin after being soaked in seawater is very low, and after the amorphous aluminum of the outer skin is dissolved, the central-portion crystal-structure zinc can also replace iron in a ship body, so that the double-anticorrosion function is realized, the anticorrosion performance of the coating is improved, the corrosion rate of the part below the ship waterline is low, the waterproof performance is good, and the service life is longer.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The waterborne epoxy anticorrosive paint for the ship below waterline is characterized by comprising the following components in parts by mass: 1 a component and a b component; wherein the content of the first and second substances,
the component A comprises the following components in parts by mass:
50-60 parts of an epoxy curing agent;
0.2-0.5 part of defoaming agent;
70-90 parts of deionized water;
2-4 parts of a rheological agent;
20-30 parts of titanium dioxide;
40-50 parts of aluminum-zinc composite powder;
the component B comprises the following components in parts by mass:
200-240 parts of epoxy resin;
the aluminum-zinc composite powder comprises amorphous aluminum-coated crystalline zinc.
2. The waterborne epoxy anticorrosive paint for ship waterlines below according to claim 1, characterized in that: the defoaming agent is a defoaming agent BYK-024.
3. The waterborne epoxy anticorrosive paint for ship waterlines below according to claim 1, characterized in that: the rheological agent is rheological agent 1010.
4. The waterborne epoxy anticorrosive paint for ship waterlines below according to claim 1, characterized in that: the particle size of the aluminum-zinc composite powder is 2-4 mu m.
5. The waterborne epoxy anticorrosive paint for ship waterlines below according to claim 1, characterized in that: the preparation process of the aluminum-zinc composite powder comprises the following steps:
1) adding zinc nanoparticles with purity of more than 99.99% and particle size of 500-800 nm into a solid particle fluidization conveyor of an apposition double-injection deposition molding machine;
2) melting aluminum blocks with the purity of more than 99.99 percent to form aluminum molten metal, and then filling the molten metal into a molten metal bag of an orthotopic double-injection deposition forming machine;
3) introducing high-pressure nitrogen with the air pressure of 0.9-1.2 Mpa into the solid particle fluidized conveyor and the metal liquid bag, and atomizing the aluminum metal liquid and the zinc nanoparticles;
4) and fully mixing the aluminum-zinc nano particles and the aluminum molten metal in the atomizing chamber, depositing the mixture on a substrate, and cooling to obtain the aluminum-zinc composite powder.
6. A method for preparing the waterborne epoxy anticorrosive paint for ship waterlines as described in any one of claims 1 to 5, characterized by comprising the steps of:
s1: mixing and stirring deionized water, a defoaming agent, a rheological agent and titanium dioxide according to the mass parts of the components, then ball-milling until the fineness of the slurry is less than 10 mu m, and discharging to obtain slurry;
s2: adding the epoxy curing agent and the aluminum-zinc composite powder into the slurry according to the corresponding mass parts, and stirring to obtain a component A;
s3: during construction, the component A and the component B are mixed and stirred according to the mass ratio of 1:1, and the mixture can be used after being cured.
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| CN104449254A (en) * | 2014-11-20 | 2015-03-25 | 南京航空航天大学 | Aluminum-zinc multi-component alloy-containing water-based epoxy coating for anti-corrosive treatment of submarine oil and gas pipelines and preparation method of water-based epoxy coating |
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| CN105440891B (en) * | 2015-12-25 | 2017-12-22 | 海南大学 | A kind of anticorrosive paint and preparation method thereof |
| CN107459909A (en) * | 2017-08-31 | 2017-12-12 | 常州苏达欧包装材料有限公司 | A kind of Environment-friendlyanti-corrosive anti-corrosive paint peculiar to vessel and preparation method thereof |
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