A kind of wear-resistant anticorrosion coating and its preparation method and application

A technology of anti-corrosion coatings and wear-resistant fillers, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of inability to improve the wear resistance of magnesium alloys, poor corrosion resistance, and accelerated corrosion of magnesium alloys. Achieve the effects of avoiding electrochemical potential difference, good storage stability, and improving wear resistance

Active Publication Date: 2022-01-25
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the poor corrosion resistance of magnesium alloys has always been a key problem restricting the wide application of magnesium alloys.
[0003] Magnesium alloys have low hardness, which leads to surface damage of magnesium alloys such as scratches during use, which further accelerates the corrosion of magnesium alloys. Therefore, another factor restricting the application of magnesium alloys in large areas is poor wear resistance
[0004] In order to improve the corrosion resistance of magnesium alloys, the commonly used treatment processes include chemical conversion coatings, Ni, Cr, NiP and other coatings, but chemical conversion coatings can only be used as the bottom layer of coatings, and cannot improve the wear resistance of magnesium alloys; Although the coating technology has improved the wear resistance of magnesium alloys to a certain extent, there is a huge potential difference between the coating material and the base magnesium alloy, and defects in the coating can easily cause and accelerate the corrosion of magnesium alloys.
Therefore, none of these processes can effectively improve the wear resistance and corrosion resistance of magnesium alloys.

Method used

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  • A kind of wear-resistant anticorrosion coating and its preparation method and application
  • A kind of wear-resistant anticorrosion coating and its preparation method and application
  • A kind of wear-resistant anticorrosion coating and its preparation method and application

Examples

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Effect test

Embodiment 1

[0048]In this example, 20 parts of silicon nitride powder with a particle size of 10 μm, 0.8 parts of fumed silica with a particle size of 20 nm, 10 parts of muscovite powder with a particle size of 12 μm, and 0.9 parts of N- Nitrosophenylamine, put into 30 parts of polyurethane resin in turn, then weigh and put into 30 parts of X-10 solvent, stir evenly and put 50 parts of grinding beads with a particle size of 1mm into the paint stirring and dispersing grinder Grind and disperse at 2000rpm for 40 minutes, take it out, and filter it with a 120-mesh stainless steel mesh to obtain component A with a size of 10 to 30 microns. Weigh 15 parts of component B modified alkyd resin curing agent, and mix component A (component A with The mass ratio of component B is 1:1-2) and the wear-resistant and anti-corrosion coating can be obtained after being fully mixed evenly.

[0049] Prepare a wear-resistant and anti-corrosion coating on the surface of the AZ91D magnesium alloy that has been...

Embodiment 2

[0056] In this embodiment, in terms of parts by mass, 30 parts of boron nitride powder with a particle size of 15 μm, 1 part of fumed silica with a particle size of 50 nm, 8 parts of ground calcium carbonate powder with a particle size of 25 μm, and 1.5 parts Hexamethylenetetramine, put into 50 parts of polyurethane resin successively, weigh again and put into 35 parts of xylene, stir evenly and put 60 parts of grinding beads with a particle diameter of 2mm in the paint stirring and dispersing grinder at 3000rpm Grind and disperse at a rotating speed for 30 minutes, take it out, and filter it with a 300-mesh stainless steel mesh to obtain component A of 10 to 30 microns, weigh 25 parts of component B curing agent, and mix component A (the mass ratio of component A to component B is 1:1~ 2) Wear-resistant and anti-corrosion coatings can be obtained after fully mixing evenly.

[0057] Prepare a wear-resistant and anti-corrosion coating on the surface of the AZ31 magnesium alloy ...

Embodiment 3

[0063] In this embodiment, in terms of parts by mass, 10 parts of silicon nitride powder with a particle size of 20 μm, 15 parts of boron nitride powder with a particle size of 15 μm, 1.2 parts of fumed silica with a particle size of 100 nm, and 5 parts of particle size Muscovite powder with a particle size of 2 μm, 7 parts of ground calcium carbonate powder with a particle size of 20 μm, 0.8 part of N-nitrosophenylamine, and 1 part of hexamethylenetetramine were put into 60 parts of polyurethane resin in sequence, and then Weigh and put in 40 parts of X-10 diluent and 40 parts of xylene, stir evenly and put them together with 80 parts of grinding beads with a particle size of 0.5 mm into a paint stirring and dispersing grinder at a speed of 1500 rpm for 60 minutes and take it out with Filter with 120 mesh stainless steel mesh to obtain component A with a size of 10-30 microns, weigh 30 parts of component B curing agent, and fully mix with component A (the mass ratio of compone...

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Abstract

The invention relates to the technical field of coatings, in particular to a wear-resistant and anti-corrosion coating and a preparation method and application thereof. The invention discloses a wear-resistant and anti-corrosion coating, which is made of A component and B component. The polyurethane resin in the coating component A is used as a coating film-former, together with corrosion inhibitors, wear-resistant fillers and body fillers. On the basis of the wear resistance of the polyurethane resin, the corrosion inhibition effect of the corrosion inhibitor and the wear resistance The high wear resistance of the filler improves the wear resistance of the coating, the use of fillers reduces the cost of the coating, and the thixotropic agent makes the coating have good storage stability. The coating composition does not contain metal components, which avoids the problem of electrochemical potential difference with the alloy, so that the corrosion of the alloy is effectively controlled. The various components of the coating of the present invention cooperate with each other and act synergistically, so that the comprehensive performance of the coating is excellent.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a wear-resistant and anti-corrosion coating and a preparation method and application thereof. Background technique [0002] Magnesium and its alloys are the lightest engineering metal materials, which have the advantages of high specific strength, easy casting and recycling, low toxicity, non-magnetic, good plastic deformation and energy absorption, etc. It has potential application prospects in industrial fields such as high thermal conductivity, low heat capacity and electrical shielding performance. But in most environments, such as humid atmospheres, seawater, simulated body fluids, engine coolants, and other corrosive environments, its application is severely limited by severe corrosion susceptibility. The high corrosion susceptibility of magnesium and its alloys is attributed to its very negative standard potential, as well as the looseness and porosity of the surface fil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/08C09D7/61B05D7/14B05D7/24
CPCC09D175/04C09D5/08C09D7/61C09D7/69C09D7/67B05D7/14B05D7/24C08K2201/014C08K2003/385C08K2003/265B05D2503/00B05D2202/10B05D2202/25B05D2202/30B05D2202/20C08L67/08C08K13/02C08K3/36C08K3/34C08K5/32C08K3/38C08K3/26C09D5/086C08K3/013C08K3/346C09D7/43
Inventor 吕旺燕
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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