Super-hydrophobic electroactive anti-pitting coating capable of being solidified under normal temperature and preparation method thereof
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A room temperature curing, super-hydrophobic technology, applied in coatings, conductive coatings, anti-corrosion coatings, etc., to achieve the effects of improving mechanical properties and mechanical properties, high effective specific surface area, and high aspect ratio
Inactive Publication Date: 2019-08-13
NORTHEAST GASOLINEEUM UNIV
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[0008] The present invention is to overcome the shortcomings and deficiencies of existing superhydrophobic coatings and polyaniline electroactive coatings existing in the background technology, and provide a kind of normal temperature curing superhydrophobic electroactive anti-pitting coating
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Embodiment 1
[0050] FEVE selects chlorotrifluoroethylene-alkyl vinyl ester, TDI is selected as the curing agent, and a super-hydrophobic electroactive coating with anti-pitting performance is prepared on the iron plate. The hydrophobicity of the coating is tested during the friction process. Anti-corrosion performance of coatings in alkali and high-concentration saline environments.
[0051] (1) Preparation of polyaniline / halloysite conductive composite
[0052] The halloysite nanotubes were ultrasonically dispersed in 0.5 mol / L sulfuric acid, and aniline monomer and ammonium persulfate initiator were added sequentially, in which the concentrations of aniline, ammonium persulfate and halloysite nanotubes were 1.86 g / L and 4.65 g / L, respectively. g / L and 0.4 g / L; after the mixed solution was stirred ultrasonically for 30 min, the chemical oxidation polymerization was carried out at 0-3 °C for 24 h.
[0053] Wash with deionized water and ethanol to remove unreacted aniline monomer and forme...
Embodiment 2
[0069] FEVE uses tetrafluoroethylene-alkyl vinyl ether copolymer, HDI trimer is used as the curing agent, and the super-hydrophobic electroactive anti-pitting corrosion coating is prepared on the aluminum plate.
[0070] Prepare coating according to the step of embodiment 1 and carry out performance test, and the difference with embodiment 1 is:
[0071] In step (1), the inorganic acid was phosphoric acid with a concentration of 0.4 mol / L, and the concentrations of aniline, ammonium persulfate and halloysite nanotubes were 2.79 g / L, 6.98 g / L and 1.12 g / L, respectively.
[0072] In step (2), the mass of halloysite nanotubes was 1.5 g, the amount of tetraethylorthosilicate was 18 mL, and the amount of perfluorodecyltriethoxysilicon was 2 mL.
[0073] In step (3), an 8 cm × 8 cm aluminum plate was selected and polished to the St3 standard with 360-mesh, 600-mesh and 1000-mesh sandpaper, respectively. After polishing, the samples were ultrasonicated with deionized water and ethan...
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Abstract
The invention relates to a super-hydrophobic electroactive anti-pitting coating capable of being solidified under normal temperature and a preparation method thereof. The super-hydrophobic electroactive anti-pitting coating is characterized by being prepared from FEVE fluorocarbon resin, a curing agent, a polyaniline/Halloysite nanotube conductive composite material, super-hydrophobic nanometer filler and an organic solvent. The preparation method comprises the steps of 1, surface pretreatment of a metallic matrix; 2, preparation of the coating, wherein the FEVE fluorocarbon resin and the curing agent are dissolved into the organic solvent, magnetic stirring and ageing are conducted, the polyaniline/Halloysite nanotube conductive composite material and the super-hydrophobic nanometer filler are added in sequence, ultrasonic dispersion is conducted for 30 minutes, stirring is conducted for 30 minutes, and then paint is obtained; the metallic matrix treated in the step 1 is brush-coatedor dip-coated or spray-coated with the paint, after solidification under normal temperature is conducted for 1 hour, the super-hydrophobic electroactive anti-pitting coating is obtained. The super-hydrophobic electroactive anti-pitting coating capable of being solidified under normal temperature has the advantages of outstanding super-hydrophobicity, self cleaning, drag reduction, wear resistance,pitting corrosion resistance, scratch resistance and weather resistance, and the coating has good social and economical benefits.
Description
technical field [0001] The invention relates to the field of preparation of superhydrophobic electroactive anti-pitting corrosion coatings, in particular to a coating with superhydrophobicity, self-cleaning, drag reduction and wear resistance, excellent pitting resistance, scratch resistance and weather resistance in the petrochemical industry and its preparation method. Background technique [0002] In recent years, most oilfields in my country have entered the development period of medium and high water cut, and the corrosive component Cl in oilfield production fluid - , gas CO 2 and H 2 Pipeline corrosion caused by S and bacteria is becoming more and more serious. The surface of traditional organic coatings such as polyurethane, epoxy resin, and polyacrylic resin is hydrophilic, which cannot effectively block moisture and corrosive components in fluids, which seriously affects the long-term protection ability of coatings on metals. [0003] The biomimetic superhydroph...
Claims
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