Corrosion-inhibiting microcapsules, preparation method thereof, magnesium alloy micro-arc oxidation electrolyte containing same and application thereof
A technology of micro-arc oxidation and magnesium alloy, which is applied in the field of electrolyte, can solve the problems of uniform corrosion, coating corrosion, and easily damaged micro-arc oxidation coating, and achieve long-term protection, small roughness, Good corrosion resistance effect
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[0020] On the one hand, the present invention provides a kind of preparation method of corrosion-inhibiting microcapsules, and described preparation method comprises the steps:
[0021] (a) After adding polyvinyl alcohol, urea, ammonium chloride, resorcinol and emulsifier into water and mixing, adjust the pH of the reaction solution to alkaline, and react;
[0022] (b) adding linseed oil and a corrosion inhibitor to the reaction solution to obtain an emulsion;
[0023] (c) adding formaldehyde to the obtained emulsion, and reacting;
[0024] (d) adjusting the pH of the reaction solution to acidity, and continuing the reaction;
[0025] (e) cooling the reaction liquid, separating, purifying and drying to obtain corrosion-inhibiting microcapsules.
[0026] The corrosion-inhibiting microcapsules provided by the present invention can endow the coating with a biomimetic self-repair function on the basis of ordinary coatings. After the ordinary coating is destroyed, the microcapsul...
Embodiment 1
[0065] Follow the steps below to prepare corrosion-inhibiting microcapsules:
[0066] (1) Add 2g polyvinyl alcohol (PVA-1788), 5g urea, 0.5g ammonium chloride, 0.5g resorcinol, 8g OP-10 into the reactor, add 250m L of water and fully stir and mix evenly. 1mol / L NaOH to adjust the pH of the solution to 8-9, raise the temperature to 55-60°C, and keep it warm for 30min;
[0067] (2) In the above solution, add a mixture of 25g linseed oil and 5g 2-mercaptobenzothiazole to form an emulsion and stabilize it for 20min;
[0068] (3) Add 10.1 g of 37% formaldehyde aqueous solution into the emulsion and react for 1 h;
[0069] (4) Use 1mol / L hydrochloric acid to adjust the pH of the emulsion to 2-3.5, and continue to react for 3 hours;
[0070] (5) Cool the synthesized suspension of corrosion-inhibiting microcapsules to room temperature, then perform suction filtration, rinse with deionized water, and then dry at 40° C. for 24 hours to obtain corrosion-inhibiting microcapsules.
[00...
Embodiment 2
[0085] Follow the steps below to prepare corrosion-inhibiting microcapsules:
[0086] (1) Add 2.4g polyvinyl alcohol (PVA-1788), 6.5g urea, 0.7g ammonium chloride, 0.6g resorcinol, 6.5g OP-10 into the reactor, add 250m L water and stir well Evenly, adjust the pH of the solution to 8-9 with 1mol / L NaOH, raise the temperature to 55-60°C, and keep it warm for 30min;
[0087] (2) In the above solution, add a mixture of 35.75g linseed oil and 7.15g benzotriazole to form an emulsion and stabilize it for 20min;
[0088] (3) Add 9.7g of 37% formaldehyde aqueous solution into the emulsion and react for 1h;
[0089] (4) Use 1mol / L hydrochloric acid to adjust the pH of the emulsion to 2-3.5, and continue to react for 3 hours;
[0090] (5) Cool the synthesized suspension of corrosion-inhibiting microcapsules to room temperature, then perform suction filtration, rinse with deionized water, and then dry at 40° C. for 24 hours to obtain corrosion-inhibiting microcapsules.
[0091] Sodium ...
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