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Novel chromium-free self-lubricating coloring aluminum coating for aviation as well as preparation method and application thereof

An aluminum coating and self-lubricating technology, applied in anti-corrosion coatings, coatings, devices for coating liquids on surfaces, etc. , process instability and other problems, to achieve the effect of improving maintainability, reducing friction coefficient, and improving connection strength

Pending Publication Date: 2020-08-18
深圳亚太航空技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chromium plating process can easily cause hydrogen embrittlement of titanium alloys, resulting in stress embrittlement of titanium alloy fasteners during use.
There are many problems such as complex process or unstable process in ion plating aluminum, anodization and other methods, which are not conducive to the batch engineering application of titanium alloy fasteners in aircraft structures
In addition, the above three surface treatment processes all have disadvantages such as high energy consumption and serious pollution, especially chrome plating, which will cause heavy metal pollution and have been banned in many developed countries

Method used

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  • Novel chromium-free self-lubricating coloring aluminum coating for aviation as well as preparation method and application thereof
  • Novel chromium-free self-lubricating coloring aluminum coating for aviation as well as preparation method and application thereof
  • Novel chromium-free self-lubricating coloring aluminum coating for aviation as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]

[0042]

[0043] The preparation method of the present embodiment is as follows:

[0044] A. Mix 10% aluminum powder with 20% modified phenolic resin, 33.5% organic solvent butanone, and 1.5% binder butyraldehyde, and stir for 20- 30min;

[0045] B. Add 5% of the first lubricant molybdenum disulfide, 10% of the second amount of lubricant polytetrafluoroethylene, 15% of hygroscopic agent acetic acid, and 5% of stabilizer dibasic lead phosphite into A, Stir with a pneumatic stirring gun for 10 minutes at a speed of 1000-2000r / min;

[0046] C. Add B into the grinder, grind for 55 minutes at a speed of 4500-5000r / min, and obtain the finished coating after filtering. The appearance of the paint color is silver, which is close to the color number 26380 in the FED-STD-595 "U.S. Federal Color Card".

[0047] The aluminum coating prepared in this embodiment, during application, refer to the following steps:

[0048] a. After degreasing the parts, use 120-220 mesh coru...

Embodiment 2

[0061]

[0062] The preparation method of the present embodiment is as follows:

[0063] A. Mix 8% aluminum powder with 30% modified phenolic resin, 30.7% organic solvent butanone, and 1.3% binder butyraldehyde, and stir for 20 minutes at a speed of 1000-1500 r / min with a pneumatic stirring gun;

[0064] B, the first lubricant molybdenum disulfide of 3.5%, the second lubricant polytetrafluoroethylene of 8%, the hygroscopic agent acetic acid of 15%, the stabilizer dibasic lead phosphite of 3.5% join in A, use Pneumatic stirring gun stirred at a speed of 1000-2000r / min for 8 minutes;

[0065] C. Add B into the grinder, grind for 50 minutes at a speed of 4500-5000r / min, and obtain the finished coating after filtering. The appearance of the paint color is silver, which is close to the color number 26380 in the FED-STD-595 "U.S. Federal Color Card".

[0066] During the application of the aluminum paint of the present embodiment, its steps are:

[0067] a. After degreasing the...

Embodiment 3

[0080]

[0081] The preparation method of the present embodiment is as follows:

[0082] A. Mix 5% aluminum powder with 40% modified phenolic resin, 35% organic solvent butanone, and 1% binder butyraldehyde, and stir for 20- 30min;

[0083] B, 2% of the first lubricant molybdenum disulfide, 5% of the second lubricant polytetrafluoroethylene, 10% of hygroscopic agent acetic acid, 2% of stabilizer dibasic lead phosphite are added to A, with Pneumatic stirring gun stirs for 12min at the speed of 1000-2000r / min;

[0084]C. Add B into the grinder, grind for 58min at a speed of 4500-5000r / min, and obtain the finished coating after filtering. The appearance of the paint color is silver, which is close to the color number 26380 in the FED-STD-595 "U.S. Federal Color Card".

[0085] During the application of the novel chrome-free self-lubricating colored aluminum paint of the present embodiment, its steps are:

[0086] a. After degreasing the parts, use 120-220 mesh corundum san...

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Abstract

The invention provides a novel chromium-free self-lubricating coloring aluminum coating for aviation as well as a preparation method and application thereof. The self-lubricating aluminum coating comprises modified phenolic resin, a lubricating agent, a moisture absorbent, a stabilizing agent, aluminum powder, an organic solvent and a binding agent; during application, a pneumatic spray gun (HVLP)or an electrostatic spray gun is used for spraying the aluminum coating on the surface of a pretreated part, the coating is cured for 60 min at the temperature of 190 + / -10 DEG C after surface drying, and the coating can be formed. According to the coating thickness formed through the coating method, the coating thickness of all the working faces of the external thread fastener can be controlledbetween 5 micrometers and 12.7 micrometers, and the coating thickness of all the working faces of the internal thread fastener can be controlled between 5 micrometers and 20 micrometers. The aluminumcoating disclosed by the invention does not contain heavy metal chromium and meets the environment-friendly requirement; the coating has good binding force, can resist various hydraulic oils, paint removers and cleaning agents without deterioration, can provide a good anti-corrosion effect for parts such as titanium alloy fasteners and the like, and improves the reliability of products; and the coating has a self-lubricating function, so that the mounting torque and the dismounting torque can be greatly reduced.

Description

【Technical field】 [0001] The invention relates to the field of coatings, in particular to a novel chrome-free self-lubricating colored aluminum coating for aviation and its preparation method and application. 【Background technique】 [0002] With the continuous development of military and civil aerospace vehicles, the aviation industry has put forward higher requirements for the load capacity and service life of the aircraft. High-strength fasteners made of titanium alloy continue to replace traditional aerospace fasteners. has become a mainstream trend. However, when titanium alloys are in contact with aluminum alloys with negative potentials, galvanic corrosion is prone to occur, resulting in failures such as "seizure". Therefore, effective protective measures must be taken to ensure the reliability of structural connections. At the same time, since titanium alloy fasteners are mostly used for interference fit, the surface protection layer needs to have good adhesion, toug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/14C09D5/10C09D7/61C09D7/65C09D7/63B05D7/24B05D5/00B05D5/12
CPCB05D5/00B05D5/12B05D7/24C08K2003/0812C08K2003/3009C09D5/103C09D161/14C09D7/61C09D7/63C09D7/65C08L27/18C08K13/02C08K3/08C08K5/09C08K3/30
Inventor 王乃文剧照
Owner 深圳亚太航空技术股份有限公司
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