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Graphene/alkane composite coating for aluminum alloy plate strip and preparation method thereof

A technology of aluminum alloy strips and composite coatings, which is applied in the direction of coatings, anti-corrosion coatings, and devices for coating liquid on the surface, which can solve the problems of poor corrosion resistance and environmental protection of conversion coatings

Active Publication Date: 2020-10-30
CHINALCO RUIMIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional chemical conversion of hexavalent chromium is not environmentally friendly and basically cannot be used; phosphating treatment requires a large amount of raw materials such as acid and alkali, and there are problems in the treatment and discharge of waste liquid phosphorus, and the corrosion resistance of the conversion coating is not good.

Method used

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  • Graphene/alkane composite coating for aluminum alloy plate strip and preparation method thereof
  • Graphene/alkane composite coating for aluminum alloy plate strip and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of preparation method of graphene / alkane composite coating for aluminum alloy strip comprises the following steps:

[0037] (1) Surface pretreatment: The aluminum alloy plate with a width of 50 cm is subjected to alkali washing, degreasing, and hot air drying.

[0038] (2) Coating preparation: add graphene with a surface oxygen / carbon ratio of 1:30 to n-dodecane and n-tridecane (mass ratio 2:1), stir mechanically for 30 minutes, and then place it under low-temperature circulating water conditions for ultrasonication Disperse for 30 minutes, keep the temperature of the coating at 35°C to 45°C, prepare graphene dispersion A; add N-β-(aminoethyl)-γaminopropyltrimethoxysilane coupling agent to graphene dispersion under stirring In liquid A, continue mechanical stirring and aging for 12 hours to prepare graphene dispersion B; add graphene dispersion B to n-dodecane and n-tridecane, and mechanically stir for 30 minutes to prepare a coating. Graphene accounts for 0.01%...

Embodiment 2～5

[0041] Examples 2-5: Different from Example 1, the surface oxygen / carbon ratios of graphene (according to the examples) are 1:15, 1:10, 1:5, 1:1.

Embodiment 6-8

[0042] Embodiment 6-8: Different from Embodiment 1, the coupling agent (according to the embodiment) is γ-aminopropylmethyldiethoxysilane, anilinomethyltriethoxysilane, diethylamino Substituted methyltriethoxysilane and aminopropyltriethoxysilane, the mass ratio is 1:2.

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PUM

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Abstract

The invention belongs to the technical field of aluminum alloy plate coating materials, and particularly relates to a graphene / alkane composite coating for an aluminum alloy plate strip. The coating at least comprises alkane or cycloalkane, graphene and derivatives thereof, and a silane coupling agent, and the coating disclosed by the invention has the process characteristics of environmental protection, low cost, simple process, continuous production and the like, has the excellent performances of high corrosion resistance, high wear resistance, hydrophobicity, high coating binding force, lowsurface resistivity, long service life and the like, and is suitable for surface treatment of aluminum alloy so as to meet the requirements of an aluminum alloy material storage process, subsequent welding, coating and the like.

Description

technical field [0001] The invention belongs to the technical field of coating materials for aluminum alloy plates, and in particular relates to a graphene / alkane composite coating for aluminum alloy plates and strips. Background technique [0002] Aluminum alloy has the advantages of good mechanical properties, light weight, and corrosion resistance, and has been widely used in various industries, especially in aerospace, marine ships, new energy vehicles, and high-end sports cars that require high lightweight. Aluminum alloys will inevitably corrode during storage and use, and aluminum alloy sheets need to be bonded, painted and other processing procedures during the application process. Therefore, the surface treatment technology of aluminum alloys is one of the important factors affecting their use. [0003] Aluminum alloys are generally surface treated by chemical conversion, anodic oxidation, coating and other methods, and as a primer, chemical conversion is preferred,...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/08C09D7/63B05D7/16B05D3/02
CPCB05D3/0209B05D3/0254B05D7/16C09D1/00C09D5/08C09D7/63
Inventor 黄瑞银张易宁林俊鸿陈素晶吴建新林梅钦
Owner CHINALCO RUIMIN
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