Preparation methods of acid-doped pyrrole-m-toluidine copolymer and modified anticorrosive coating

Abstract

The invention provides preparation methods of an acid-doped pyrrole-m-toluidine copolymer and a modified anticorrosive coating. An acid-doped pyrrole-m-toluidine copolymer material is prepared by a chemical oxidative polymerization method, E-44 epoxy resin is modified with the pyrrole-m-toluidine copolymer material, the acid-doped pyrrole-m-toluidine copolymer material is added in the epoxy resin, Q235 carbon steel is coated with the modified epoxy resin, and the anticorrosive performance of the coated Q235 carbon steel is studied. When the volume ratio of pyrrole and m-toluidine is 2 to 1, the synthesized copolymer, as filler, is added in the epoxy resin to be used as a coating, and a coating layer of the coating is largest in resistance and smallest in corrosion current density, i.e. the corrosion resistance performance of the coating is the best. By passing through binding force rating, the coating can reach a primary standard and has very good constructability. The coating has dual advantages of polypyrrole and the m-toluidine and is very good in conductivity, good in anticorrosive performance, small in pollution and low in cost.

Description

technical field

[0001] The invention relates to an anti-corrosion coating, in particular to a preparation method and application of an acid-doped pyrrole-m-toluidine copolymer modified anti-corrosion coating, which belongs to the field of material engineering. Background technique

[0002] Metal corrosion will cause huge losses, but no matter now or in the future, metal materials occupy an important position in the field of materials with their excellent mechanical and technological properties. Therefore, research on metal corrosion protection methods to control metal corrosion and reduce corrosion losses, It is of great significance to the development of the national economy. The most commonly used method is to coat the metal surface with an anti-corrosion coating to isolate the corrosive medium from contacting the metal substrate. With the development of construction, transportation, petrochemical, electric power and other industries, the market size of anti-corrosion coa...

Examples

Embodiment 1

[0024] Paint preparation:

[0025] Take 10g epoxy resin in beaker with electronic balance; Add 1-methyl-2-pyrrolidone (diluent) of 1g in epoxy resin and stir with glass rod; Add 0.6g ethylenediamine (curing agent) in beaker ), and stir evenly to obtain pure epoxy resin coating. And then evenly coated on Q235 carbon steel.

Embodiment 2

[0027] 1. Preparation of polypyrrole:

[0028] ① Weigh ammonium persulfate and deionized water to make 0.4M ammonium persulfate solution, set aside;

[0029] ②Pyrrole monomer and m-toluidine monomer are added dropwise into a clean beaker at a volume ratio of 1:0 (1=0.5ml);

[0030] ③Add 10ml of 0.5M citric acid to the beaker in step ②, then put it into an ultrasonic cleaner and shake for 5-8 minutes, so that there is a layer of white transparent oil on the surface;

[0031] ④ Take out the beaker of step ③ and slowly add 5ml of the ammonium persulfate solution prepared in step ①, and shake the beaker while adding, the reaction is rapid, and the color of the solution gradually changes from colorless and transparent to purple red and finally to purple black;

[0032] ⑤ Seal the beaker with plastic wrap, place it at room temperature, and let it stand for 20-24 hours;

[0033] ⑥ Cross-wash with deionized water and absolute ethanol, and perform suction filtration while washing to ...

Embodiment 3

[0041] 1. Preparation of acid-doped pyrrole-m-toluidine copolymer:

[0042] ① Weigh ammonium persulfate and deionized water to make 0.4M ammonium persulfate solution, set aside;

[0043] ② Add dropwise monomers and m-toluidine monomers into a clean beaker at a volume ratio of 1:1 (1=0.5ml);

[0044] ③Add 10ml of 0.5M citric acid to the beaker in step ②, then put it into an ultrasonic cleaner and shake it for 5-8 minutes, so that there is a layer of white transparent oil on the surface;

[0045] ④ Take out the beaker of step ③ and slowly add 5ml of the ammonium persulfate solution prepared in step ①, and shake the beaker while adding, the reaction is rapid, and the color of the solution gradually changes from colorless and transparent to purple red and finally to purple black;

[0046] ⑤ Seal the beaker with plastic wrap, place it at room temperature, and let it stand for 20-24 hours;

[0047] 6. Cross-wash with deionized water and absolute ethanol, and carry out suction filt...

technical field

[0001] The invention relates to an anti-corrosion coating, in particular to a preparation method and application of an acid-doped pyrrole-m-toluidine copolymer modified anti-corrosion coating, which belongs to the field of material engineering. Background technique

[0002] Metal corrosion will cause huge losses, but no matter now or in the future, metal materials occupy an important position in the field of materials with their excellent mechanical and technological properties. Therefore, research on metal corrosion protection methods to control metal corrosion and reduce corrosion losses, It is of great significance to the development of the national economy. The most commonly used method is to coat the metal surface with an anti-corrosion coating to isolate the corrosive medium from contacting the metal substrate. With the development of construction, transportation, petrochemical, electric power and other industries, the market size of anti-corrosion coa...

Examples

Embodiment 1

[0024] Paint preparation:

[0025] Take 10g epoxy resin in beaker with electronic balance; Add 1-methyl-2-pyrrolidone (diluent) of 1g in epoxy resin and stir with glass rod; Add 0.6g ethylenediamine (curing agent) in beaker ), and stir evenly to obtain pure epoxy resin coating. And then evenly coated on Q235 carbon steel.

Embodiment 2

[0027] 1. Preparation of polypyrrole:

[0028] ① Weigh ammonium persulfate and deionized water to make 0.4M ammonium persulfate solution, set aside;

[0029] ②Pyrrole monomer and m-toluidine monomer are added dropwise into a clean beaker at a volume ratio of 1:0 (1=0.5ml);

[0030] ③Add 10ml of 0.5M citric acid to the beaker in step ②, then put it into an ultrasonic cleaner and shake for 5-8 minutes, so that there is a layer of white transparent oil on the surface;

[0031] ④ Take out the beaker of step ③ and slowly add 5ml of the ammonium persulfate solution prepared in step ①, and shake the beaker while adding, the reaction is rapid, and the color of the solution gradually changes from colorless and transparent to purple red and finally to purple black;

[0032] ⑤ Seal the beaker with plastic wrap, place it at room temperature, and let it stand for 20-24 hours;

[0033] ⑥ Cross-wash with deionized water and absolute ethanol, and perform suction filtration while washing to ...

Embodiment 3

[0041] 1. Preparation of acid-doped pyrrole-m-toluidine copolymer:

[0042] ① Weigh ammonium persulfate and deionized water to make 0.4M ammonium persulfate solution, set aside;

[0043] ② Add dropwise monomers and m-toluidine monomers into a clean beaker at a volume ratio of 1:1 (1=0.5ml);

[0044] ③Add 10ml of 0.5M citric acid to the beaker in step ②, then put it into an ultrasonic cleaner and shake it for 5-8 minutes, so that there is a layer of white transparent oil on the surface;

[0045] ④ Take out the beaker of step ③ and slowly add 5ml of the ammonium persulfate solution prepared in step ①, and shake the beaker while adding, the reaction is rapid, and the color of the solution gradually changes from colorless and transparent to purple red and finally to purple black;

[0046] ⑤ Seal the beaker with plastic wrap, place it at room temperature, and let it stand for 20-24 hours;

[0047] 6. Cross-wash with deionized water and absolute ethanol, and carry out suction filt...

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