Preparation method of hydrophobic composite anti-corrosion coating and application thereof

A composite coating and anti-corrosion technology, which is applied in the preparation of inorganic nano-filler-epoxy resin hydrophobic composite anti-corrosion coating, and in the field of corrosion protection of metal materials, can solve the problem that the corrosion protection effect of resin coating is difficult to maintain, and achieve Improves anti-corrosion effect, improves thermal stability, and enhances corrosion resistance

Inactive Publication Date: 2021-11-02
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the resin usually has a three-dimensional network structure with a large number of pores, it is difficult to maintain the long-term and stable corrosion protection effect of the resin coating

Method used

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  • Preparation method of hydrophobic composite anti-corrosion coating and application thereof
  • Preparation method of hydrophobic composite anti-corrosion coating and application thereof
  • Preparation method of hydrophobic composite anti-corrosion coating and application thereof

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preparation example Construction

[0031] A method for preparing a hydrophobic composite anti-corrosion coating disclosed by the present invention comprises the following steps:

[0032] (1) Using octadecyltrichlorosilane to treat inorganic nanoparticles SiO 2 、TiO 2 Modification to obtain inorganic nano fillers with hydrophobic properties;

[0033] (2) mixing inorganic nano filler with epoxy resin and curing agent, adding a certain amount of acetone diluent to obtain composite coating material;

[0034] (3) Coating the composite coating material on the surface of the copper substrate by roller coating, and obtaining the inorganic nano filler-epoxy resin hydrophobic composite anti-corrosion coating after curing.

[0035] Wherein, the hydrophobic modification of the inorganic nanoparticles specifically includes processes such as modification, centrifugation, washing, and drying. More specifically, the mass of inorganic nanoparticles added during the modification process is 2-4g, absolute ethanol is 50-100mL, ...

Embodiment 1

[0038] Mix epoxy resin and polyamide resin curing agent in a mass ratio of 2:1, add 10wt.% modified nano-TiO 2 Particles, and 2wt.% acetone diluent was added, stirred and mixed at room temperature to obtain a uniform composite coating emulsion material.

[0039] Use 240, 800, 1200 mesh silicon carbide sandpaper to polish the surface of the metal copper substrate with a size of 5mm × 5mm in sequence, then wash and degrease with deionized water, acetone and ethanol in sequence, and finally dry;

[0040] Use a wire bar coater to roll-coat the above-mentioned composite coating emulsion material on the surface of the copper substrate after treatment. The thickness of the roll-coating is 30 μm, the curing temperature is 80 ° C, and the curing time is 3 hours. Finally, TiO 2 Nanoparticle filler-epoxy resin hydrophobic composite anticorrosion coating.

Embodiment 2

[0042] Mix epoxy resin and polyamide resin curing agent in a mass ratio of 2:1, add 30wt.% modified nano-TiO 2 particles, and adding 5wt.% acetone diluent, stirring and mixing at room temperature to obtain a uniform composite coating emulsion material.

[0043] Use a wire bar coater to roll-coat the above-mentioned composite coating emulsion material on the surface of the copper substrate after treatment. The thickness of the roll-coating is 80 μm, the curing temperature is 100 ° C, and the curing time is 5 hours. Finally, TiO 2 Nanoparticle filler-epoxy resin hydrophobic composite anticorrosion coating.

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Abstract

The invention discloses a preparation method of a hydrophobic composite coating and an application thereof. The preparation method comprises the following steps: carrying out surface modification on inorganic nano silicon dioxide particles or titanium dioxide particles; adding the modified inorganic nanoparticles into a mixed emulsion of epoxy resin and a curing agent, and stirring to uniformly disperse the particles to obtain a composite coating material; and the inorganic nanofiller-epoxy resin composite anti-corrosion coating is constructed on the surface of metal copper by using the composite coating material through a roller coating method. According to the preparation method provided by the invention, the coating is endowed with hydrophobic property while the stability of the single epoxy resin coating is strengthened, the wear resistance of the coating and the barrier effect on a corrosive environment can be effectively improved, and the corrosion resistance of copper in a salt environment is further strengthened.

Description

technical field [0001] The invention relates to corrosion protection technology for metal materials, in particular to a preparation method and application of an inorganic nano filler-epoxy resin hydrophobic composite anti-corrosion coating, which belongs to the field of anti-corrosion coatings. Background technique [0002] Metal copper is widely used in various fields of production and life due to its good formability, thermal conductivity and electrical conductivity. However, copper in Cl - Corrosion easily occurs under conditions such as the presence of halogen ions (such as in the marine environment), which has brought serious economic losses and environmental pollution. The coating protection method is a main method to slow down the corrosion rate of copper, which can improve the corrosion resistance of copper by reducing the direct contact between copper and corrosive medium. [0003] Resin is the most widely used coating material because of its superior corrosion re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/62
Inventor 蒋莉袁妍董延茂周兴
Owner SUZHOU UNIV OF SCI & TECH
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