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Protective coating for repairing metal surface damage, preparation method and composite material

A protective coating and metal surface technology, applied in anti-corrosion coatings, coatings, polyester coatings, etc., can solve problems such as potential safety hazards, corrosion damage of steel pipe piles, and reduced service life, and achieve high anti-erosion and wear effects , Repair damage, improve the effect of interface performance

Pending Publication Date: 2022-01-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem solved by the invention is that steel pipe piles in seawater are susceptible to corrosion damage caused by the harsh marine environment, which has potential safety hazards and reduces their service life

Method used

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  • Protective coating for repairing metal surface damage, preparation method and composite material
  • Protective coating for repairing metal surface damage, preparation method and composite material
  • Protective coating for repairing metal surface damage, preparation method and composite material

Examples

Experimental program
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Effect test

preparation example Construction

[0035] like figure 1As shown, another embodiment of the present invention provides a method for preparing the above protective coating, comprising the steps of:

[0036] Coating the resin material to the damaged area of ​​the metal material base, and preparing a resin material layer on the surface of the damaged area of ​​the metal material base;

[0037] After surface modification, the fiber cloth is pasted to the resin material layer, and a fiber cloth layer is formed on the surface of the resin material layer;

[0038] The photosensitizer or photoinitiator is added to the photocurable resin and mixed evenly, and the functional nanomaterials are modified to obtain functional nanomaterials modified by covalent bonds or non-covalent bonds. The functional nanomaterials modified by non-covalent bonds are added to the photocurable resin to obtain the photocurable composite resin, and the photocurable composite resin is applied to the fiber cloth layer to form a fast curing resin...

Embodiment 1

[0048] The cationic photo-initiating material is added to the epoxy acrylate and mixed evenly, wherein the content of the photo-initiating material is 5wt%;

[0049] The ultra-high molecular weight polyethylene nanomaterials were modified by covalent bonds with chitosan, and the covalently modified ultra-high molecular weight polyethylene nanomaterials with a mass fraction of 1 wt% were added to epoxy acrylate to obtain epoxy resins. Acrylic composite resin coating;

[0050] Coating epoxy resin on the surface of the corrosion damaged steel pipe pile, and pasting the surface-modified plain ultra-high molecular weight polyphenylene sulfide fiber cloth on the epoxy resin;

[0051] The epoxy acrylic composite resin coating is coated on the surface of ultra-high molecular weight polyphenylene sulfide fiber cloth to form such as figure 2 Fast curing fiber cloth reinforced coating shown;

[0052] At room temperature, the fast-curing fiber cloth reinforced coating is completely cur...

Embodiment 2

[0057] The photosensitizer is added to the urethane acrylate and mixed evenly, wherein the content of the photosensitizer is 8wt%, and 1wt% of the boron nitride nanomaterial modified by the covalent bond of nanocellulose is added to the urethane acrylate to obtain the polyurethane Acrylate composite resin coating;

[0058] Paste the twill aramid fiber cloth to the surface of the corrosion-damaged steel pipe pile coated with epoxy resin;

[0059] The polyurethane acrylate composite resin coating is coated on the surface of the twill aramid fiber cloth to form a fiber cloth composite material;

[0060] At room temperature, the fast-curing fiber cloth reinforced coating is completely cured to form a hard fiber cloth coating after being irradiated with ultraviolet light in the 365 nm band for 2 minutes.

[0061] In this embodiment, the fiber cloth coating has a high impedance modulus, and its low-frequency impedance value can reach 8×10 11 Ω / cm 2 , and has excellent erosion res...

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Abstract

The invention provides a protective coating for repairing metal surface damage, a preparation method and a composite material. The protective coating is arranged on the surface of a metal material matrix damage area and comprises a resin material layer, a fiber cloth layer and a fast curing resin layer which are sequentially arranged on the surface of the metal material matrix damage area from inside to outside, wherein the fiber cloth layer comprises surface-modified fiber cloth; the fast curing resin layer comprises a photosensitizer or a photoinitiator; and the fast curing resin layer further comprises light-cured resin and a functional nano material modified by a covalent bond or a non-covalent bond. The protective coating provided by the invention has relatively high anti-erosion wear and anti-corrosion effects; and by adding the modified functional nano material into the fast curing resin and modifying the fiber cloth, the interface performance among the layers of the protective coating is improved, so that the protective coating can resist the damage such as corrosion, external force impact and erosion to the surface of a metal material matrix in a severe marine environment.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular, to a protective coating for repairing metal surface damage, a preparation method and a composite material. Background technique [0002] Under the harsh marine environment, various marine engineering materials have been exposed to the marine environment of high temperature, high humidity and high salt spray for a long time, especially under the continuous spray erosion, erosion wear and corrosion of seawater and sediment in the tidal zone. It is easy to cause accelerated damage and failure of metal materials. In addition, once there is corrosion damage on the surface of steel pipe piles, under the alternating coupling action of the above harsh environmental conditions, more serious corrosion damage will be caused, which will greatly reduce the service life of the bridge and cause major hidden dangers to people's life safety. will cause serious economic losses. SUMMAR...

Claims

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Application Information

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IPC IPC(8): E02B17/00E02D27/52E02D31/06C09D163/10C09D187/00C09D175/14C09D7/62C09D5/08C09D167/06
CPCE02B17/0026E02D27/52E02D31/06C09D163/10C09D175/14C09D7/62C09D5/08C09D167/06C08K2201/011C08K2003/385C08L87/005C08K9/08C08K3/38C08K9/06C08K3/14C08K3/042
Inventor 赵文杰吴英豪吴杨敏赵清源王立平
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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