Metal corrosion-resistant composite material coating and preparation method thereof
A composite material, metal anti-corrosion technology, applied in anti-corrosion coatings, coatings, etc., can solve the problem of difficult to adhere to metal substrates, and achieve the effect of preventing metal corrosion, good toughness and strong viscosity
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Embodiment 1
[0049] Embodiment 1 adopts following preparation method:
[0050] S100, mixing and stirring 15 parts of graphite powder in 22 parts of N-methylpyrrolidone;
[0051] S200, performing ultrasonic exfoliation on the mixture in S100 to obtain non-functionalized nano-graphene;
[0052] S300, adding 16 parts of acetic anhydride and 16 parts of m-phenylenediamine to the non-functionalized graphene obtained in S200, after ultrasonic treatment at 80°C to 100°C for 5 minutes, mixing and stirring for 0.5h to 2.0h to carry out in-situ polymerization, After in-situ polymerization of acid anhydride and diamine to generate polyamic acid, a nano-graphene / polyamic acid mixture is obtained;
[0053] S400, the nanographene / polyamic acid mixture that S300 is obtained is evenly coated on the alloy steel surface of cleaning;
[0054] S500. After curing the alloy steel coated with nano-graphene / polyamic acid mixture at 150°C for 5 minutes to 10 minutes, and then curing at 250°C to 280°C for 5 minut...
Embodiment 2
[0055] Embodiment 2 adopts following preparation method:
[0056] S100, mixing and stirring 22 parts of graphite powder in 20 parts of N-methylpyrrolidone;
[0057] S200, performing ultrasonic exfoliation on the mixture in S100 to obtain non-functionalized nano-graphene;
[0058] S300. Add 18 parts of phthalic anhydride and 20 parts of triethylenediamine to the non-functionalized graphene obtained in S200, and add 15 parts of multi-walled carbon nanotubes. After ultrasonic treatment at 80°C to 100°C for 5 minutes , mixing and stirring for 0.5h to 2.0h to carry out in-situ polymerization, wherein the acid anhydride and diamine are in-situ polymerized to form polyamic acid, and then the nano-graphene / polyamic acid mixture is obtained;
[0059] S400, the nanographene / polyamic acid mixture that S300 is obtained is evenly coated on the alloy steel surface of cleaning;
[0060] S500. After curing the alloy steel coated with nano-graphene / polyamic acid mixture at 150°C for 5 minute...
Embodiment 3
[0061] Embodiment 3 adopts following preparation method:
[0062] S100, mixing and stirring 25 parts of graphite powder in 32 parts of N-methylpyrrolidone;
[0063] S200, performing ultrasonic exfoliation on the mixture in S100 to obtain non-functionalized nano-graphene;
[0064] S300, adding 18 parts of diphenyl ether dianhydride and 18 parts of m-phenylenediamine to the non-functionalized graphene obtained in S200, and adding 15 parts of multi-walled carbon nanotubes, and ultrasonically treating at 80°C to 100°C for 5 minutes Afterwards, mix and stir for 0.5h to 2.0h for in-situ polymerization, in which acid anhydride and diamine are in-situ polymerized to form polyamic acid, then add 3 to 5 parts of m-phenylenediamine for stirring to obtain nano-graphene / polyamide Acid PAA mixture;
[0065] S400, the nanographene / polyamic acid mixture that S300 is obtained is evenly coated on the alloy steel surface of cleaning;
[0066] S500. After curing the alloy steel coated with nan...
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