Polymer coating material for early-warning of metal corrosion and preparation method of polymer coating material

A polymer coating, metal corrosion technology, applied in coatings, luminescent coatings, etc., can solve the problems of low corrosion detection sensitivity and no change, and achieve the effect of avoiding poor compatibility, avoiding corrosion, and good stability

Active Publication Date: 2019-08-30
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Zhang J, etal.Corrosion Houston Tx, 1999,55(10):957-967; Raps D, etal.CorrosionScience, 2009,51(5):1012-1021) However, compared with early warning of corrosion sites by fluorescence Compared with the detection sensitivity of early warning corrosion through the color change of the corrosion part is low, often when the early corrosion has occurred, the color of the corrosion part still does not change

Method used

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  • Polymer coating material for early-warning of metal corrosion and preparation method of polymer coating material
  • Polymer coating material for early-warning of metal corrosion and preparation method of polymer coating material
  • Polymer coating material for early-warning of metal corrosion and preparation method of polymer coating material

Examples

Experimental program
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Effect test

Embodiment 1

[0035](1) Synthesis of copolymer: Weigh 4.71g (30mmol) dimethylaminoethyl methacrylate (DMAEMA), 5.82g (58mmol) styrene (St), 11.80g (64mmol) isooctyl acrylate (EHA) , 4.64g (40mmol) of hydroxyethyl acrylate (HEA) was dissolved in 80mL of ethyl acetate, and then 0.886g of initiator azobisisobutyronitrile was added, deoxygenated by nitrogen gas for 30min, and reacted at 80°C for 24h. After the reaction was completed, most of the solvent was removed by rotary evaporation, diluted with tetrahydrofuran (THF), and repeatedly precipitated with petroleum ether to obtain the copolymer PDHES.

[0036] (2) Dissolve the copolymer PDHES16g in 80mL N,N-dimethylformamide (DMF), and then add 1.03g (5.3mmol) 5-chloromethyl-8-hydroxyquinoline (CHQ) to the solution, 0.5g sodium iodide was used as a catalyst, 3g potassium carbonate was used as an acid-binding agent, the reaction was carried out at 80°C for 24h, and the quaternized polymer QPDHES was obtained by repeated precipitation in ether. ...

Embodiment 2

[0040] (1) Synthesis of copolymer: Weigh 4.71g (30mmol) dimethylaminoethyl methacrylate (DMAEMA), 7.5g (75mmol) styrene (St), 7.38g (40mmol) isooctyl acrylate (EHA) , 5.8g (50mmol) of hydroxyethyl acrylate (HEA) was dissolved in 80mL of ethyl acetate, and then 0.886g of initiator azobisisobutyronitrile was added, nitrogen was passed through to remove oxygen for 30min, and the reaction was carried out at 80°C for 24h. After the reaction was completed, most of the solvent was removed by rotary evaporation, diluted with tetrahydrofuran (THF), and repeatedly precipitated with petroleum ether to obtain the copolymer PDHES;

[0041] (2) Dissolve 16g of the copolymer PDHES in 80mL of N,N-dimethylformamide (DMF), and then add 0.5g (2.6mmol) of 5-chloromethyl-8-hydroxyquinoline (CHQ) to the solution , 0.5g sodium iodide as a catalyst, 3g potassium carbonate as an acid-binding agent, reacted at 80°C for 24h, and repeatedly precipitated in ether to obtain a quaternized ammonium polymer. ...

Embodiment 3

[0045] (1) Synthesis of copolymer: Weigh 6.28g (40mmol) dimethylaminoethyl methacrylate (DMAEMA), 5.82g (58mmol) styrene (St), 11.80g (64mmol) isooctyl acrylate (EHA) , 4.64g (40mmol) of hydroxyethyl acrylate (HEA) was dissolved in 80mL of ethyl acetate, and then 0.886g of initiator azobisisobutyronitrile was added, deoxygenated by nitrogen gas for 30min, and reacted at 80°C for 24h. After the reaction was completed, most of the solvent was removed by rotary evaporation, diluted with tetrahydrofuran (THF), and repeatedly precipitated with petroleum ether to obtain the copolymer PDHES;

[0046] (2) Dissolve the copolymer PDHES16g in 80mL N,N-dimethylformamide (DMF), and then add 0.71g (3.5mmol) 5-bromomethyl-8-hydroxyquinoline (BHQ) to the solution, 3g of potassium carbonate was used as an acid-binding agent, reacted at 60°C for 24h, and repeatedly precipitated in ether to obtain a quaternized polymer. Dissolve 8g of quaternized polymer in 30mL of ethyl acetate, add 1.6g of is...

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Abstract

The invention discloses a preparation method of a fluorescent early-warning polymer coating of light metal early-corrosion, and belongs to the technical field of coating materials. The preparation method mainly comprises the following contents: firstly synthesizing a multi-component acrylate random copolymer, then performing quaternized modification on the resin by using an 8-hydroxyquinoline derivative, and finally preparing a photo-sensitive polymer. The photo-sensitive polymer is coated on the surface of a light metal such as magnesium and aluminum to prepare the early-corrosion fluorescentearly-warning coating. When corrosion occurs, a corrosion part can emit bright blue-green fluorescence under ultraviolet light irradiation, and thus an early-warning role for early-corrosion is played. The metal early-corrosion early-warning coating can detect and report early-corrosion of a metal before indicating any visible corrosion signs, the maintenance personnel is alerted to take measuresto avoid further corrosion of the metal, and thus the coating is a non-destructive early-corrosion detection mean.

Description

technical field [0001] The invention belongs to the field of coating materials, and in particular relates to an early warning technology for detecting metal corrosion. Background technique [0002] With the requirements of light weight in industrial production and the trend of energy saving and emission reduction under my country's increasingly tightened environmental protection policies, light metals represented by magnesium and aluminum alloys are more and more used in aircraft, ships, automobiles and 3C manufacturing. . The problem of metal corrosion is becoming more and more serious, and the economic loss caused by metal corrosion in my country has reached 4% of the gross national product every year. Therefore, corrosion protection has always been a scientific field of research in countries all over the world. In production applications, protective coatings are often applied to metal surfaces. Over time, protective coatings can fail due to prolonged exposure to corrosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F212/08C08F220/34C08F8/02C09D133/08C09D5/22
CPCC08F8/02C08F220/18C09D5/22C09D133/08C08F220/1808C08F212/08C08F220/34
Inventor 李小杰潘凯刘晓亚魏玮刘仁
Owner JIANGNAN UNIV
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