Aluminum-alloy anticorrosion coating and preparing method and application thereof

A technology for anti-corrosion coatings and aluminum alloys, applied in the field of metal protective coatings and aluminum alloy anti-corrosion coatings, can solve the problems of poor coating compactness, poor adhesion between coatings and aluminum alloys, easy to fall off, etc., to achieve good adhesion and comprehensive Excellent anti-corrosion performance and good flexibility

Active Publication Date: 2017-01-04
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

For example, some researchers used the gel sol method to prepare nano-SiO 2 Hybrid coating, the anti-corrosion coating is formed on the surface of aluminum alloy by dipping-pulling method, which reduces the corrosion current density of aluminum alloy in 3.5% NaCl solution by 2 orders of magnitude, but the adhesion between the coating and aluminum alloy Not good, easy to fall off during long-term corrosion
For another example, some researchers prepared cemented carbide coatings on the surface of aluminum alloys by laser cladding. Although this coating has good bonding force and high bonding strength, the compactness of the coating is poor.

Method used

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  • Aluminum-alloy anticorrosion coating and preparing method and application thereof
  • Aluminum-alloy anticorrosion coating and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Disperse 0.2g pyrogallol and 0.8g graphene (purchased from Ningbo Moxi Technology Co., Ltd., the number of graphene layers is about 6-8 layers) in 20mL n-butanol, stir at 1500r / min for 30min, and then add 6g titanium dioxide, 15g talcum powder, stir, add the prepared dispersion slurry to 20g epoxy resin E20 (purchased from Shandong Deyuan Epoxy Technology Co., Ltd.), add 10g strontium chrome yellow (purchased from Shanghai Chrome Yellow Pigment Factory) successively Suzhou branch), 8g zinc phosphate (purchased from Shanghai Longbo Chemical Co., Ltd.), 15mL xylene, 1g polyamide wax, 1g bentonite, 0.5g leveling agent BYK392, stirred at 1000r / min for 20min, then added 10g cardanol The curing agent (purchased from Wuxi Guangming Chemical Co., Ltd.) was stirred evenly to obtain an aluminum alloy anti-corrosion coating. The adhesion, flexibility, salt spray resistance and salt water immersion resistance of the coating formed by it are shown in Table 1. The coated aluminum all...

Embodiment 2

[0054] Disperse 0.1g Triton X100, 0.1g benzyl alcohol and 0.7g graphene (purchased from Ningbo Moxi Technology Co., Ltd., the number of graphene layers is about 6-8 layers) in 30mL n-butanol, and stir at 1500r / min 30min, then add 10g titanium dioxide successively, 15g talcum powder, stir, add the prepared dispersion slurry in 20g epoxy resin E44 (purchased from Shandong Deyuan Epoxy Technology Co., Ltd.), add successively 15g strontium chrome yellow (purchased from Shanghai Chrome Yellow Pigment Factory Suzhou Branch), 8g zinc phosphate (purchased from Shanghai Longbo Chemical Co., Ltd.), 15mL xylene, 1g polyamide wax, 0.5g bentonite, 0.6g leveling agent BYK392, 1000r / min stirring for 20min , then add 12g of polyamide curing agent DF1228 (purchased from Shandong Deyuan Epoxy Technology Co., Ltd.), and stir evenly to obtain an aluminum alloy anti-corrosion coating. The adhesion, flexibility, salt spray resistance and The resistance to salt water immersion is shown in Table 1. ...

Embodiment 3

[0056] Disperse 0.2g pyrogallol and 0.8g graphene (purchased from Ningbo Moxi Technology Co., Ltd., the number of graphene layers is 6-8 layers) in 20mL n-butanol, stir at 1500r / min for 30min, and then add 8g Titanium dioxide, 12g talcum powder, stirring, the prepared dispersion slurry is added to 20g epoxy resin (purchased from Shandong Deyuan Epoxy Technology Co., Ltd.), and 10g strontium chrome yellow (purchased from Shanghai Chrome Yellow Pigment Factory, Suzhou, China) is added successively. branch), 8g zinc phosphate (purchased from Shanghai Longbo Chemical Co., Ltd.), 15mL xylene, 2g polyamide wax, 0.5g leveling agent BYK392, stirred at 1000r / min for 20min, then added 10g cardanol curing agent (purchased from Wuxi Guangming Chemical Co., Ltd.) and stir evenly to obtain an aluminum alloy anti-corrosion coating. The adhesion, flexibility, salt spray resistance and salt water immersion resistance of the coating formed by it are shown in Table 1.

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Abstract

The invention discloses an aluminum-alloy anticorrosion coating and a preparing method and application thereof. The aluminum-alloy anticorrosion coating is mainly prepared from epoxy resin, titanium dioxide, talcum powder, strontium chrome yellow, tribasic zinc phosphate, graphene, a dispersing agent, an organic solvent, a flatting agent, an anti-settling agent, an epoxy hardener and the like. The aluminum-alloy anticorrosion coating is easy to prepare and low in cost, the adhesive force of a formed coating (a paint film) and aluminum alloy and magnesium alloy base materials is good, the flexibility is good, the comprehensive anticorrosion performance is excellent, and the aluminum-alloy anticorrosion coating has broad application prospects in the field of anticorrosion of aluminum alloy products and magnesium alloy products.

Description

technical field [0001] The invention relates to a metal protection coating, in particular to an aluminum alloy anticorrosion coating, its preparation method and application, and belongs to the field of metal protection. Background technique [0002] Aluminum alloy has low density, good corrosion resistance, high specific strength, and easy processing and forming, so that aluminum alloy products are widely used in the marine environment and aviation fields. In the conventional atmospheric corrosion environment, the aluminum alloy surface can form a dense oxide protective film and has good corrosion resistance. , the aluminum alloy structure has a strong corrosion sensitivity. Compared with other materials, the corrosion problem of aluminum alloy structure is more prominent. In the marine atmospheric environment, aluminum alloys are prone to pinhole corrosion, mainly because the local area on the surface of the aluminum alloy will be eroded by chloride ions, the dense passiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D5/08C09D7/12
CPCC09D5/08C09D5/084C09D163/00C08L77/00C08K13/04C08K7/00C08K3/04C08K2003/2241C08K3/346C08K2003/328
Inventor 王立平刘栓蒲吉斌薛群基
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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