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CN101397817B - Coating method of underwater curing anti-corrosive antifouling paint for sea facilities - Google Patents

Coating method of underwater curing anti-corrosive antifouling paint for sea facilities Download PDF

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Publication number
CN101397817B
CN101397817B CN2008101736727A CN200810173672A CN101397817B CN 101397817 B CN101397817 B CN 101397817B CN 2008101736727 A CN2008101736727 A CN 2008101736727A CN 200810173672 A CN200810173672 A CN 200810173672A CN 101397817 B CN101397817 B CN 101397817B
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CN
China
Prior art keywords
underwater
coating
component
marine
antifouling
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Expired - Fee Related
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CN2008101736727A
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Chinese (zh)
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CN101397817A (en
Inventor
米绍毅
周治才
刘志群
郑业梅
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GAUNGDONG TOPCHEM INDUSTRY CO LTD
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GAUNGDONG TOPCHEM INDUSTRY CO LTD
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Priority to CN2008101736727A priority Critical patent/CN101397817B/en
Publication of CN101397817A publication Critical patent/CN101397817A/en
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Publication of CN101397817B publication Critical patent/CN101397817B/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/30Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

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  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention discloses a coating method of a marine facility underwater-curing anti-corrosion and antifouling paint, which comprises the following steps: A. marine attachments on underwater facilities are scooped; B. an underwater construction anti-corrosion primer is prepared according to the following weight ratio: the weight ratio of a component A to a component B equals to 100 to 30-40; after being mixed evenly, the underwater construction anti-corrosion primer is coated on the underwater facilities; and C. two hours later, an underwater construction anti-corrosion and antifouling finishpaint is prepared according to the following weight ratio: the weight ratio of the component A to the component B equals to 100 to 25-30; after being mixed evenly, the underwater construction anti-corrosion and antifouling finish paint is coated on the primer obtained in the step B. The coating method has convenient construction and can be blade coating, wind coating and roller coating. The underwater-curing anti-corrosion and antifouling coating obtained by the coating method has quite strong curing adhesion, excellent anti-corrosion and antifouling performances in oceans and high construction efficiency.

Description

Coating method of underwater curing anti-corrosion and anti-fouling paint for marine facilities
Technical Field
The invention relates to a coating method of a special anticorrosive antifouling paint, in particular to a coating method of an underwater cured anticorrosive antifouling paint for marine facilities.
Background
At present, concrete structures and steel structures which are soaked in seawater for a long time often suffer from marine corrosion and marine pollution. The main cause of marine corrosion is chloride ion penetration, and the main cause of marine pollution is adsorption of marine organisms such as conch and seaweed. The existing epoxy-amide curing system has the defect that the roller coating cannot be carried out in underwater construction.
Disclosure of Invention
The invention aims to provide a coating method of an underwater curing anticorrosive antifouling paint for marine facilities.
The method solves the problems of corrosion and pollution prevention of concrete and steel structures, adopts coating with good corrosion and pollution prevention performance, and is a practical corrosion and pollution prevention method with low cost and high economy.
Based on the above purpose, the invention adopts the following technical scheme:
a coating method of underwater cured anticorrosion and antifouling paint for marine facilities comprises the following steps:
A. shoveling off marine attachments on the underwater facilities;
B. the underwater construction anticorrosion primer comprises the following components in percentage by weight: the component B is 100: 30-40, uniformly stirring and coating on an underwater facility;
C. after 2 hours, the underwater construction anticorrosion antifouling finish paint comprises the following components in percentage by weight: the component B is 100: 25-30, uniformly stirring, and then coating the mixture on the primer obtained in the step B;
wherein,
the component A comprises the following components in parts by weight:
47-76 parts of epoxy resin
0.3-0.8 part of modified organic silicon bentonite
4.2-4.5 parts of plasticizer
17.0-17.5 parts of mica powder
0.1-0.2 part of organic silicon defoaming agent;
the component B contains 95-100 wt% of epoxy curing agent based on the weight of the component B.
In the step B, a scraper is used for directly scraping the primer on the underwater facility; alternatively, the primer is directly roll coated onto the underwater installation with a roll brush.
In the step C, a scraper is used for directly scraping and coating the finish paint on the base paint obtained in the step B; or, directly blade-coating the top coat on the base coat obtained in the step B by using a roller brush.
The invention has the advantages that:
the coating method can be used for blade coating, winding and roller coating, is convenient to construct, and the obtained underwater cured anticorrosive antifouling paint coating has strong curing adhesive force, excellent anticorrosive antifouling performance in the ocean and high construction efficiency.
Detailed Description
Selecting raw materials:
1085 Special curing agent, Changsha Puzhang Biotechnology, Inc., the brand of which is totally named as "1085A type complete underwater strong low-temperature epoxy curing agent". The curing agent is modified based on the branching of a special modified amine curing agent, and a hydrophilic group is modified into a hydrophobic group, so that the problems of whitening phenomenon and great reduction of strength when the epoxy adhesive is used underwater are solved; compared with the use in a dry environment, the strength retention rate is nearly 100 percent.
1085 technical specification of special curing agent:
1. appearance: pale yellow viscous, translucent liquid.
2. Amine value: 200-250 mgKOH/g.
3. Viscosity: 200-300 mPas (25 ℃ C.).
4. Specific gravity: 1.02-1.04(20 ℃).
5. Freezing point: can be cured at-20 ℃ and above-8 ℃.
6. Toxicity: LD50>20000 mg/k.
7. Initial fixation is carried out for 5-7 hours at 25 ℃ and complete fixation is carried out for 6-7 days.
Plasticizer NX-2013, manufactured by kadela chemical (zhhai) limited.
The technical indexes are as follows:
epoxy equivalent: 500
Brookfield viscosity: 40-70cps/25 deg.C
Color by the garner method: 9
Solid content: 100 percent
Hydrolyzable chlorine content: 1 percent.
F881- -production of modified organobentonite, Zhejiang Linan Qinghong Bentonite.
The technical indexes are as follows:
color: light yellow
Appearance: fine powder of
Water content: less than or equal to 3 percent
Density: 1.6g/cm3
Amphoteric surfactant 170, manufacturer: zhejiang Lingan paint auxiliary agent factory.
The technical indexes are as follows:
appearance: light yellow liquid
Solid content: 50 +/-2%
Density: 1.03g/cm3
BYK331 is a polyether modified silicone, produced by Bick, Germany.
The technical indexes are as follows:
appearance: light yellow liquid
Solid content: 96 plus or minus 2 percent
Density: 1.04g/cm3
Examples
The specific coating method (knife coating with a doctor blade, die coating with glass cloth, winding coating with a roll brush, and roll coating) was as follows:
firstly, shoveling off marine attachments on underwater facilities by using a pneumatic tool.
Secondly, mixing the underwater construction anticorrosion primer according to the following components: the component B is 100: 40, after being stirred uniformly, the coating is directly scraped and coated on an underwater facility by a scraper or directly coated on the underwater facility by a roller brush.
Thirdly, after 2 hours, the underwater construction anticorrosion antifouling finish paint comprises the following components: the component B is 100: 25, after being stirred uniformly, the mixture is directly coated on the primer of the front road by a scraper or directly coated on the primer of the front road by a roller brush.
Formula and preparation of underwater construction anticorrosion primer
The component A comprises:
e44 epoxy resin 76 kg
4.2 kg of NX-2013 plasticizer
17.2 kg of mica powder
Modified bentonite anti-settling agent F8810.8 kg
1700.3 kg of wetting dispersant
Silicone antifoam BYK 3310.1 kg
0.8 kg of solvent-free coal tar pitch
B, component B:
1085 Special curing agent 9.9 kg
Aminosilane coupling agent BM 210.1 kg
The construction method comprises the following steps:
a component A: curing agent 100: 40
And (3) formula analysis:
e44 is solvent-free low-molecular epoxy resin with moderate viscosity (viscosity Pa S/25 ℃: 6-10), and the viscosity is too high or too low to be beneficial for underwater paint.
The NX-2013 plasticizer is an epoxy group-containing cashew nut shell oil modified epoxy resin diluent, has a good plasticizing effect, has small influence on the chemical corrosion resistance of a system, and is not easy to cause the problem of plasticizer migration.
3. The mica powder is selected to enhance the corrosion resistance of the system, and as the mica powder is a flaky filler, a labyrinth effect is generated in a paint film layer, so that the permeability resistance to corrosion medium is improved by times.
4.881F-is an efficient anti-settling agent and is also a consistency regulator, so that the consistency of the paint system is in a more ideal range.
5.170 is a filler wetting dispersant with high cost performance.
BYK331 is an efficient defoamer to prevent paint from generating bubbles during production and construction.
7. The solvent-free coal tar can be used as a toner which is easy to disperse and can also be used as an anticorrosion reinforcing agent, and the coal tar pitch has extremely strong hydrophobicity.
8. The curing agent 1085 is selected because the epoxy adhesive prepared by the common epoxy curing agent has an unsatisfactory use effect, can only be used for bonding on the surface of a dry adherend, if the curing agent is used in water or a surface wetting agent or underwater, the bonding strength is reduced sharply, and some bonding cannot be performed, and when the common underwater curing agent is used underwater, the bonding strength is reduced by at least more than half compared with the bonding strength used in a dry environment, so that the phenomenon of whitening occurs.
The 1085 type completely underwater strong type epoxy resin curing agent is a water-increasing curing agent which does not react with water and adheres by reacting with epoxy resin while removing water from an adherend when adhering it. The adhesive can be bonded in a humid environment and underwater, and the bonding strength is almost one hundred percent of the retention rate compared with the bonding strength in a dry environment.
The detection results of the underwater construction anticorrosion primer are shown in table 1.
TABLE 1 detection results of underwater construction anticorrosion primer
Item Index (I) Test results Test method
Paint film color and appearance Indefinite and smooth color tone Light grey, flat film Visualization
Solid content,% of 96 98.8 GB/T1725-79(89)
Fineness, um is not more than 60 55 GB/T1724-79(89) A process
Drying time, h GB/T1728-79(89) A process
Watch stem 0.5 0.5
Dried bean curd 2 1
Hardness of not less than 0.5 0.6 GB/T1730-93(B method)
Flexibility, mm not greater than 3 3 GB/T1731-93
Adhesion of not more than 2 1 GB/1720-79(89)
Resistance to salt water, 6d No bubbling and rust No bubbling and rust GB/T1763-79(89)
Salt spray resistance, 240h Level 1 Level 1 GB/T1771-91
Underwater anti-corrosion antifouling finish paint
A component A:
827 epoxy resin 47 kg
4.5 kg of NX-2013 plasticizer
Titanium white powder 9 kg
Lemon yellow 1 kg
17 kg of zinc-copper composite anti-fouling agent
17 kg of mica powder
Zinc oxide 3.8 kg
Modified organosilicon bentonite F8810.3 kg
Silicone antifoam BYK 3310.2 kg
Solvent-free coal tar pitch 0.2 kg
The component B is 1085 epoxy curing agent.
The construction comprises the following components: curing agent 100: 25
And (3) formula analysis:
1. 827 is a solvent-free low molecular weight epoxy resin with low viscosity and excellent wetting and dispersing effects on pigments and fillers.
2. The NX-2013 plasticizer is an epoxy group-containing cashew nut shell oil modified epoxy resin diluent, has a good plasticizing effect, has small influence on the chemical corrosion resistance of a system, and is not easy to cause the problem of plasticizer migration.
3. The mica powder is selected to enhance the corrosion resistance of the system, and as the mica powder is a flaky filler, a labyrinth effect is generated in a paint film layer, so that the permeability resistance to corrosion medium is improved by times.
4. 881F-is a highly effective anti-settling agent and also a consistency regulator, which makes the consistency of the paint system in a more ideal range.
5. BYK331 is an efficient defoaming agent, and prevents the paint from generating bubbles during production and construction.
6. The composite anti-fouling agent is a high-efficiency anti-fouling agent and can inhibit the over-rapid growth of marine organisms.
7. The solvent-free coal tar can be used as a toner which is easy to disperse and can also be used as an anticorrosion reinforcing agent, and the coal tar pitch has extremely strong hydrophobicity.
8. The 1085 curing agent is selected because the epoxy adhesive prepared by the common epoxy curing agent has an unsatisfactory use effect, can only be used for bonding on the surface of a dry adherend, if the epoxy adhesive is used in water or a surface wetting agent or underwater, the bonding strength is reduced sharply, and some of the epoxy adhesives can not be bonded, and when the common underwater curing agent is used underwater, the bonding strength is reduced by at least more than half compared with the use in a dry environment, so that the phenomenon of whitening is generated.
The 1085 type completely underwater strong type epoxy resin curing agent is a hydrophobic curing agent which does not react with water and adheres by reacting with the epoxy resin while removing water from an adherend when adhering it. It can be used for bonding in humid and underwater environment, and its bonding strength is retained at a ratio of several hundred percent compared with that in dry environment.
The detection results of the underwater anticorrosive antifouling finish paint are shown in table 2.
TABLE 2 detection results of underwater corrosion and stain resistant topcoat
Item Index (I) Test results Test method
Paint film color and appearance Indefinite and smooth color tone Light grey, flat film Visualization
Solid content,% of 96 98.8 GB/T1725-79(89)
Fineness, um is not more than 40 35 GB/T1724-79(89) A process
Drying time, h GB/T1728-79(89) A process
Watch stem 0.5 0.5
Dried bean curd 2 1
Hardness of not less than 0.5 0.6 GB/T1730-93(B method)
Flexibility, mm not greater than 3 3 GB/T1731-93
Adhesion of not more than 2 1 GB/1720-79(89)
Resistance to salt water, 40 days No bubbling and rust No bubbling and rust GB/T1763-79(89)
Alkali resistance, 30d 30% (m/m) NaOH No bubbling and rust No bubbling and rust GB/T1763-79(89)
Acid resistance, 50d 30% (m/m) H<sub>2</sub>SO<sub>4</sub> No bubbling and rust No bubbling and rust GB/T1763-79(89)
Salt spray resistance, 240h Level 1 Level 1 GB/T1771-91
Resistance to soiling No marine organism attachment in 200 days Qualified
The method for coating the underwater curing anticorrosive and antifouling paint for marine facilities provided by the invention is described in detail, the principle and the embodiment of the invention are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (5)

1. A coating method of underwater curing anticorrosive antifouling paint for marine facilities is characterized by comprising the following steps:
A. shoveling off marine attachments on the underwater facilities;
B. preparing the first component A and the first component B according to the weight ratio of 100: 40, uniformly stirring, and coating the mixture on an underwater facility;
the first component A comprises the following formula: 76 kg of E44 epoxy resin, 4.2 kg of NX-2013 plasticizer, 17.2 kg of mica powder, 0.8 kg of modified bentonite anti-settling agent F881, 0.3 kg of wetting dispersant 170, 0.1 kg of organic silicon defoamer BYK331 and 0.8 kg of solvent-free coal pitch; the first component B comprises the following formula: 1085 Special curing agent 9.9 kg, amino silane coupling agent BM21 0.1 kg;
C. after 2 hours, preparing the second component and the second component of 100: 25 by weight ratio of the underwater construction anticorrosion antifouling finish paint, uniformly stirring and coating the mixture on the primer obtained in the step B;
wherein the second component formula is as follows: 827 47 kg of epoxy resin, 4.5 kg of NX-2013 plasticizer, 9 kg of titanium dioxide, 1 kg of lemon yellow, 17 kg of zinc-copper composite anti-fouling agent, 17 kg of mica powder, 3.8 kg of zinc oxide, 0.3 kg of modified organic bentonite F881, 0.2 kg of organic silicon defoamer BYK331 and 0.2 kg of solvent-free coal tar pitch; the second component B is 1085 epoxy curing agent.
2. The method for coating the marine underwater curable anticorrosive and antifouling paint according to claim 1, wherein: in the step B, the primer is directly coated on the underwater facility by a scraper.
3. The method for coating the marine underwater curable anticorrosive and antifouling paint according to claim 1, wherein: and in the step B, directly rolling the primer on the underwater facility by using a roller brush.
4. The method for coating the marine underwater curable anticorrosive and antifouling paint according to claim 1, wherein: and in the step C, directly coating the top coat on the base coat obtained in the step B by using a scraper.
5. The method for coating the marine underwater curable anticorrosive and antifouling paint according to claim 1, wherein: and in the step C, directly blade-coating the finish paint on the base paint obtained in the step B by using a roller brush.
CN2008101736727A 2008-11-07 2008-11-07 Coating method of underwater curing anti-corrosive antifouling paint for sea facilities Expired - Fee Related CN101397817B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008101736727A CN101397817B (en) 2008-11-07 2008-11-07 Coating method of underwater curing anti-corrosive antifouling paint for sea facilities

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2008101736727A CN101397817B (en) 2008-11-07 2008-11-07 Coating method of underwater curing anti-corrosive antifouling paint for sea facilities

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CN101397817B true CN101397817B (en) 2010-09-29

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107936825A (en) * 2011-06-30 2018-04-20 汉伯公司 Fouling control coating compositions
CN104234214A (en) * 2014-07-30 2014-12-24 汪峻峰 Construction method for anticorrosive paint for building bars
CN104693966A (en) * 2015-02-09 2015-06-10 中国船舶重工集团公司第七二五研究所 Preparation method of solvent-free anticorrosive paint for underwater construction
CN109306230A (en) * 2018-10-10 2019-02-05 广州市修米德科技有限公司 A kind of strong adhesive force environmental protection coating material that anti-pollution is excellent

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