CN108893034B - Anti-corrosion bactericidal coating for ship drinking water tank and preparation method thereof - Google Patents
Anti-corrosion bactericidal coating for ship drinking water tank and preparation method thereof Download PDFInfo
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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
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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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
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
Abstract
The invention discloses an anticorrosive bactericidal coating for a ship drinking water tank and a preparation method thereof, wherein the anticorrosive bactericidal coating for the ship drinking water tank comprises the following components in parts by mass: 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 shell powder; the component B comprises the following components in parts by mass: 200-240 parts of epoxy resin; 30-40 parts of amorphous nano zinc. The invention is safe and environment-friendly, has the functions of corrosion resistance, water resistance and sterilization, and has simple preparation and implementation processes.
Description
Technical Field
The invention relates to an anticorrosive bactericidal coating for a ship drinking water tank and a preparation method thereof, belonging to the technical field of coatings.
Background
At present, a ship drinking water cabin is a main source of daily domestic water for ship workers, fresh water supplied by ships in a long marine running time is in a static state for a long time, bacteria are easy to breed in a humid marine environment, and chloride ions in water are easy to corrode the drinking water cabin. There are mainly 2 types of coatings currently in use: (1) the water-based paint has the advantages of safety and environmental protection, but the marine environment is a high-humidity high-salt fog environment, the water resistance is not solvent-based paint, the service life is short compared with that of solvent-based or solvent-free paint, and the phenomenon of flash corrosion sometimes occurs when the film forming is slow. (2) The solvent-free coating has thick film formation, is not easy to generate cracks, has low coating consumption compared with water-based coatings, but has higher requirements on coating construction, and the mechanical properties of a coating film are greatly influenced by high humidity or poor ventilation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the anticorrosive bactericidal coating for the ship drinking water tank, which is safe and environment-friendly, has the functions of corrosion resistance, water resistance and sterilization, and is simple in preparation and implementation processes.
In order to solve the technical problems, the technical scheme of the invention is as follows: an anticorrosive bactericidal coating for a ship drinking water tank comprises the following components in percentage by mass of 1.2:1 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 shell powder;
the component B comprises the following components in parts by mass:
200-240 parts of epoxy resin;
30-40 parts of amorphous nano zinc.
Further, the defoaming agent is BYK-024.
Further, the rheological agent is rheological agent 1010.
Further, the shell powder is of a porous fibrous structure.
Further, the particle size of the shell powder is 3-4 microns.
Furthermore, the particle size of the amorphous nano zinc is 500-800 nm.
Further, the preparation process of the amorphous nano zinc comprises the following steps:
1) melting zinc blocks with the purity of more than 99.99 percent into zinc metal liquid, filling the zinc metal liquid into a metal liquid bag of a jet deposition forming machine, introducing high-pressure nitrogen with the air pressure of 0.9-1.2 MPa into the metal liquid bag to atomize the zinc metal liquid in an atomizing chamber, depositing the zinc metal liquid on a substrate, and cooling to obtain amorphous zinc particles with the particle size of 2-4 mu m;
2) carrying out cryogenic treatment on the obtained amorphous zinc particles, and soaking in liquid nitrogen;
3) ball-milling the cryogenically treated amorphous zinc particles to 1-2 mu m, and soaking in liquid nitrogen;
4) ball-milling the non-crystal zinc particles treated by the subzero treatment in the step 3) to 500-800 nm, and soaking in liquid nitrogen for later use.
The invention also provides a preparation method of the anticorrosive bactericidal coating for the ship drinking water tank, which comprises the following steps:
s1: stirring deionized water, a defoaming agent, a rheological agent and shell powder 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 an epoxy curing agent into the obtained slurry according to corresponding mass parts, and stirring to obtain a component A;
s3: adding the amorphous zinc particles in corresponding parts by mass into the epoxy resin in corresponding parts by mass to obtain a component B;
s4: during construction, the component A and the component B are mixed and stirred according to the mass ratio of 1.2:1, and the mixture can be used after being cured.
After the technical scheme is adopted, the anticorrosive bactericidal paint for the ship drinking water tank is prepared by adding shell powder and amorphous nano zinc, calcining and crushing natural shells at high temperature, has the components of calcium carbonate, calcium oxide, calcium hydroxide, chitin and other calcifications, is a porous fibrous structure, has the functions of adsorbing and decomposing (formaldehyde, benzene, TVOC and ammonia gas), and has extremely strong antibacterial and bactericidal effects on various bacteria including escherichia coli, salmonella, yellow glucose bacteria and the like. The amorphous nano zinc has good water dispersibility, no crystal boundary zinc atoms are uniformly arranged, no crystal boundary corrosion occurs, the coating has strong corrosion resistance, electrochemical corrosion can be effectively prevented, the preparation method is simple, and the service life of the drinking water tank for ships reaches more than 10 years.
Drawings
FIG. 1 is a schematic diagram of the preparation process of amorphous zinc particles according to the present invention; wherein, the method comprises the following steps of 1-zinc metal liquid, 2-metal liquid package, 3-atomization chamber, 4-amorphous zinc particles, 5-closing valve, 6-sealing plug and 7-substrate; 8-a cooler.
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
An anticorrosive bactericidal coating for a ship drinking water tank comprises the following components in percentage by mass of 1.2:1 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 shell powder;
the component B comprises the following components in parts by mass:
200 parts of epoxy resin;
30 parts of amorphous nano zinc.
In this embodiment, the epoxy resin may be
3961-1, the epoxy curing agent may be a water-soluble curing agent
3986 and the epoxy resin are
3961-1 crosslinking reaction forms a net-structured paint film with strong water resistance.
The defoamer can be BYK-024.
The rheological agent may be rheological agent 1010.
The shell powder is a porous fiber structure, has the functions of adsorbing and decomposing (formaldehyde, benzene, TVOC and ammonia gas), and has strong antibacterial and bactericidal effects on various bacteria including escherichia coli, salmonella, yellow glucose bacteria and the like.
The particle size of the shell powder is 3-4 mu m.
The particle size of the amorphous nano zinc is 500-800 nm, the amorphous nano zinc has no crystal boundary zinc atoms which are uniformly arranged, has good water dispersibility, acid and alkali corrosion resistance, does not generate crystal boundary corrosion, has strong corrosion resistance, can effectively prevent electrochemical corrosion, has higher activity than steel, and can replace an iron sacrificial anode and dissolve in the seawater or salt spray corrosion process under extreme conditions.
The preparation process of the amorphous nano zinc comprises the following steps:
1) melting zinc blocks with the purity of more than 99.99 percent into zinc metal liquid, filling the zinc metal liquid into a metal liquid bag of a jet deposition forming machine, introducing high-pressure nitrogen with the air pressure of 0.9-1.2 MPa into the metal liquid bag to atomize the zinc metal liquid in an atomizing chamber, depositing the zinc metal liquid on a substrate, and cooling to obtain amorphous zinc particles with the particle size of 2-4 mu m; wherein the deposition distance is set to be 300mm, and the cooling speed is 20 ℃/s;
2) carrying out cryogenic treatment on the obtained amorphous zinc particles, and soaking in liquid nitrogen at the temperature of-196 ℃ for 24 hours;
3) ball-milling the cryogenically treated amorphous zinc particles at a low speed of 200r/min to 1-2 mu m, and soaking in liquid nitrogen at the temperature of-196 ℃ for 24 hours;
4) ball-milling the non-crystal zinc particles treated by the subzero treatment in the step 3) at a low speed of 200r/min to 500-800 nm, and soaking in liquid nitrogen at the temperature of-196 ℃ for later use.
The preparation method of the anticorrosive bactericidal coating for the ship drinking water tank comprises the following steps:
s1: adding deionized water, a defoaming agent, a rheological agent and shell powder into a stirrer according to the mass parts of the components, stirring for 10min at a low speed of 200r/min, adding zirconia beads and glass beads into the stirrer, grinding for 40min at a speed of 1000r/min, and discharging to obtain slurry after the fineness of the slurry is less than 10 mu m;
s2: adding an epoxy curing agent into the obtained slurry according to corresponding mass parts, and stirring to obtain a component A;
s3: adding the amorphous zinc particles in corresponding parts by mass into the epoxy resin in corresponding parts by mass to obtain a component B;
s4: during construction, the component A and the component B are mixed and stirred according to the mass ratio of 1.2:1, and the mixture is cured for 10 minutes to be used.
Example two
An anticorrosive bactericidal coating for a ship drinking water tank comprises the following components in percentage by mass of 1.2:1 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 shell powder;
the component B comprises the following components in parts by mass:
220 parts of epoxy resin;
35 parts of amorphous nano zinc.
In this embodiment, the epoxy resin may be
3961-1, the epoxy curing agent may be a water-soluble curing agent
3986 and the epoxy resin are
3961-1 crosslinking reaction forms a net-structured paint film with strong water resistance.
The defoamer can be BYK-024.
The rheological agent may be rheological agent 1010.
The shell powder is a porous fiber structure, has the functions of adsorbing and decomposing (formaldehyde, benzene, TVOC and ammonia gas), and has strong antibacterial and bactericidal effects on various bacteria including escherichia coli, salmonella, yellow glucose bacteria and the like.
The particle size of the shell powder is 3-4 mu m.
The particle size of the amorphous nano zinc is 500-800 nm, the amorphous nano zinc has no crystal boundary zinc atoms which are uniformly arranged, has good water dispersibility, acid and alkali corrosion resistance, does not generate crystal boundary corrosion, has strong corrosion resistance, can effectively prevent electrochemical corrosion, has higher activity than steel, and can replace an iron sacrificial anode and dissolve in the seawater or salt spray corrosion process under extreme conditions.
The preparation process of the amorphous nano zinc comprises the following steps:
1) melting zinc blocks with the purity of more than 99.99 percent into zinc metal liquid, filling the zinc metal liquid into a metal liquid bag of a jet deposition forming machine, introducing high-pressure nitrogen with the air pressure of 0.9-1.2 MPa into the metal liquid bag to atomize the zinc metal liquid in an atomizing chamber, depositing the zinc metal liquid on a substrate, and cooling to obtain amorphous zinc particles with the particle size of 2-4 mu m; wherein the deposition distance is set to be 300mm, and the cooling speed is 20 ℃/s;
2) carrying out cryogenic treatment on the obtained amorphous zinc particles, and soaking in liquid nitrogen at the temperature of-196 ℃ for 24 hours;
3) ball-milling the cryogenically treated amorphous zinc particles at a low speed of 200r/min to 1-2 mu m, and soaking in liquid nitrogen at the temperature of-196 ℃ for 24 hours;
4) ball-milling the non-crystal zinc particles treated by the subzero treatment in the step 3) at a low speed of 200r/min to 500-800 nm, and soaking in liquid nitrogen at the temperature of-196 ℃ for later use.
The preparation method of the anticorrosive bactericidal coating for the ship drinking water tank comprises the following steps:
s1: adding deionized water, a defoaming agent, a rheological agent and shell powder into a stirrer according to the mass parts of the components, stirring for 10min at a low speed of 200r/min, adding zirconia beads and glass beads into the stirrer, grinding for 40min at a speed of 1000r/min, and discharging to obtain slurry after the fineness of the slurry is less than 10 mu m;
s2: adding an epoxy curing agent into the obtained slurry according to corresponding mass parts, and stirring to obtain a component A;
s3: adding the amorphous zinc particles in corresponding parts by mass into the epoxy resin in corresponding parts by mass to obtain a component B;
s4: during construction, the component A and the component B are mixed and stirred according to the mass ratio of 1.2:1, and the mixture is cured for 10 minutes to be used.
EXAMPLE III
An anticorrosive bactericidal coating for a ship drinking water tank comprises the following components in percentage by mass of 1.2:1 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 shell powder;
the component B comprises the following components in parts by mass:
240 parts of epoxy resin;
40 parts of amorphous nano zinc.
In this embodiment, the epoxy resin may be
3961-1, the epoxy curing agent may be a water-soluble curing agent
3986 and the epoxy resin are
3961-1 crosslinking reaction forms a net-structured paint film with strong water resistance.
The defoamer can be BYK-024.
The rheological agent may be rheological agent 1010.
The shell powder is a porous fiber structure, has the functions of adsorbing and decomposing (formaldehyde, benzene, TVOC and ammonia gas), and has strong antibacterial and bactericidal effects on various bacteria including escherichia coli, salmonella, yellow glucose bacteria and the like.
The particle size of the shell powder is 3-4 mu m.
The particle size of the amorphous nano zinc is 500-800 nm, the amorphous nano zinc has no crystal boundary zinc atoms which are uniformly arranged, has good water dispersibility, acid and alkali corrosion resistance, does not generate crystal boundary corrosion, has strong corrosion resistance, can effectively prevent electrochemical corrosion, has higher activity than steel, and can replace an iron sacrificial anode and dissolve in the seawater or salt spray corrosion process under extreme conditions.
The preparation process of the amorphous nano zinc comprises the following steps:
1) melting zinc blocks with the purity of more than 99.99 percent into zinc metal liquid, filling the zinc metal liquid into a metal liquid bag of a jet deposition forming machine, introducing high-pressure nitrogen with the air pressure of 0.9-1.2 MPa into the metal liquid bag to atomize the zinc metal liquid in an atomizing chamber, depositing the zinc metal liquid on a substrate, and cooling to obtain amorphous zinc particles with the particle size of 2-4 mu m; wherein the deposition distance is set to be 300mm, and the cooling speed is 20 ℃/s;
2) carrying out cryogenic treatment on the obtained amorphous zinc particles, and soaking in liquid nitrogen at the temperature of-196 ℃ for 24 hours;
3) ball-milling the cryogenically treated amorphous zinc particles at a low speed of 200r/min to 1-2 mu m, and soaking in liquid nitrogen at the temperature of-196 ℃ for 24 hours;
4) ball-milling the non-crystal zinc particles treated by the subzero treatment in the step 3) at a low speed of 200r/min to 500-800 nm, and soaking in liquid nitrogen at the temperature of-196 ℃ for later use.
The preparation method of the anticorrosive bactericidal coating for the ship drinking water tank comprises the following steps:
s1: adding deionized water, a defoaming agent, a rheological agent and shell powder into a stirrer according to the mass parts of the components, stirring for 10min at a low speed of 200r/min, adding zirconia beads and glass beads into the stirrer, grinding for 40min at a speed of 1000r/min, and discharging to obtain slurry after the fineness of the slurry is less than 10 mu m;
s2: adding an epoxy curing agent into the obtained slurry according to corresponding mass parts, and stirring to obtain a component A;
s3: adding the amorphous zinc particles in corresponding parts by mass into the epoxy resin in corresponding parts by mass to obtain a component B;
s4: during construction, the component A and the component B are mixed and stirred according to the mass ratio of 1.2:1, and the mixture is cured for 10 minutes to be used.
And detecting the performance indexes of the anticorrosive bactericidal paint obtained in the first to third embodiments, wherein the performance indexes comprise film thickness, glossiness, adhesive force, hardness, water resistance, salt water resistance and bacteriostasis rate. 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.
8. Mildew resistance
Brushing the paint on an aluminum plate, wherein the interval between two steps is 4 hours, the thickness of a dry film is 90-100 mu m, and a sample plate is placed under the experimental environmental conditions: curing at 25 + -1 deg.C and relative humidity of 55 + -3% for 7 d. According to the national standard GB/T1741-2007 method for testing the mold resistance of the paint film, 9 mixed mold (aspergillus niger, aspergillus flavus, mucor globosus, penicillium cumulans, trichoderma viride, aureobasidium pullulans and the like) strains are inoculated on the paint film by a black box method, a sample plate is placed in a black box with the temperature of 22-24 ℃ and the humidity of 95% for culture, and the surface of the paint film is unchanged for 35 days.
The results of the performance indexes after detection are shown in the following table 1:
TABLE 1
The anticorrosive bactericidal coating for the ship drinking water tank, which is prepared by the 3 implementation methods and multiple experiments, is prepared by adding shell powder and amorphous nano zinc, calcining natural shells at high temperature and crushing, contains calcium carbonate, calcium oxide, calcium hydroxide, chitin and other calcifications, is a porous fibrous structure, has the functions of adsorbing and decomposing (formaldehyde, benzene, TVOC, ammonia gas), and has extremely strong antibacterial and bactericidal effects on various bacteria including escherichia coli, salmonella, yellow glucose bacteria and the like. The amorphous nano zinc has good water dispersibility, no crystal boundary zinc atoms are uniformly arranged, no crystal boundary corrosion occurs, the coating has strong corrosion resistance, the electrochemical corrosion can be effectively prevented, and the preparation method is simple and can be used for the drinking water tank of the ship and the warship, and the service life of the drinking water tank can reach more than 10 years.
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 (1)
1. The preparation method of the anticorrosive bactericidal coating for the ship drinking water tank is characterized in that the anticorrosive bactericidal coating for the ship drinking water tank contains the following components in mass ratio of 1.2:1 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 shell powder;
the component B comprises the following components in parts by mass:
200-240 parts of epoxy resin;
30-40 parts of amorphous nano zinc;
the defoaming agent is BYK-024;
the rheological agent is a rheological agent 1010;
the shell powder is a porous fibrous structure;
the particle size of the shell powder is 3-4 mu m;
the grain size of the amorphous nano zinc is 500-800 nm;
the epoxy resin isAraldite® 3961-1；
The epoxy curing agent is water-soluble curing agent Aradur® 3986；
The method comprises the following steps:
s1: stirring deionized water, a defoaming agent, a rheological agent and shell powder 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 an epoxy curing agent into the obtained slurry according to corresponding mass parts, and stirring to obtain a component A;
s3: adding the amorphous zinc particles in corresponding parts by mass into the epoxy resin in corresponding parts by mass to obtain a component B;
s4: during construction, the component A and the component B are mixed and stirred according to the mass ratio of 1.2:1, and the mixture can be used after being cured;
the preparation process of the amorphous nano zinc comprises the following steps:
1) melting zinc blocks with the purity of more than 99.99 percent into zinc metal liquid, filling the zinc metal liquid into a metal liquid bag of a jet deposition forming machine, introducing high-pressure nitrogen with the air pressure of 0.9-1.2 MPa into the metal liquid bag to atomize the zinc metal liquid in an atomizing chamber, depositing the zinc metal liquid on a substrate, and cooling to obtain amorphous zinc particles with the particle size of 2-4 mu m;
2) carrying out cryogenic treatment on the obtained amorphous zinc particles, and soaking in liquid nitrogen;
3) ball-milling the cryogenically treated amorphous zinc particles to 1-2 mu m, and soaking in liquid nitrogen;
4) ball-milling the non-crystal zinc particles treated by the subzero treatment in the step 3) to 500-800 nm, and soaking in liquid nitrogen for later use.
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