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Method for sealing and preventing integral wing tank of large-medium transport from corrosion

An integral fuel tank and transporter technology, which is applied to chemical instruments and methods, fuel tanks of power units, and devices for coating liquids on surfaces, etc. The environmental pollution of the fuel tank cannot be satisfied, and the effect of high sealing reliability, improving sealing reliability, and prolonging sealing anti-corrosion life is achieved.

Active Publication Date: 2011-03-02
SHAANXI AIRCRAFT CORPORATION
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the overall fuel tank of large and medium-sized transport aircraft is much larger than the above example, and has higher requirements for sealing, anticorrosion and life. It can no longer meet the requirements of the current large and medium-sized wall plate integral fuel tanks in terms of environmental pollution and fuel tank reduction

Method used

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Effect test

Embodiment Construction

[0019] The anti-corrosion method for sealing and anti-corrosion of the integral fuel tank of the wing of a large and medium-sized transport aircraft is based on the anti-corrosion method of the inner wall of the fuel tank during the sealing and assembly process of the overall fuel tank, and the sealing and anti-corrosion method for the inner and outer seams of the assembly gap. The specific steps are:

[0020] (1) Spray S06-1010H anti-corrosion primer on the inner surface of the metal wall plate of the fuel tank anodized by sulfuric acid, the coating thickness is 40μm±5μm, and it is cured at 100℃±3℃×3h;

[0021] (2) When the overall fuel tank is assembled and the seam is sealed, brush a layer of NJD-4 adhesive primer on the glued part that has been sprayed with S06-1010H anti-corrosion primer, and the dosage is 70g / m 2 ~80g / m 2 , dry in a natural environment (about 25min), NJD-4 adhesive primer can effectively improve the adhesion between the sealant and the substrate;

[002...

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Abstract

The invention belongs to the technical field of aerospace manufacture and relates to a method for sealing and preventing an integral wing tank of a large-medium transport from corrosion. The method has the following beneficial effects: in the process of assembling the panel integral tank, the sealant is used for sealing inside and outside the clearances to achieve the effect of sealing the assembling clearances; the adhesive prime cost is simultaneously adopted to enhance the adhesion of the substrate to the sealant; the corrosion preventing prime coat is sprayed on the panel to achieve the aims of reducing weight and preventing corrosion; the protective coating is brushed on the surface of the sealant to reduce corrosion of the microbial by-products on the sealant so as to prolong the sealing life; at the same time, the neutral soapy water is adopted as the separant, thus solving the sealing and assembling problems of the detachable parts of the tank; and the tank has the advantages of good economy, high sealing reliability and convenient detachment and maintenance.

Description

technical field [0001] The invention belongs to the technical field of aviation manufacturing, and relates to a sealing and anticorrosion method for an integral fuel tank of a wing of a large and medium-sized transport aircraft. Background technique [0002] The sealing and anticorrosion of the integral fuel tank of the wing generally uses a sealant / film to seal the inside, outside and surface of the seam to achieve the sealing and anticorrosion effect. Take the overall fuel tank of the outer wing of a medium-sized transport aircraft as an example: the fuel tank is small in size, and the prefabricated XM21 sealant film is used as the inner seal of the seam, and XM22 is used as the outer seal of the seam. This type of method can basically meet the sealing and anticorrosion design and process requirements of small integral fuel tanks. At present, the overall fuel tank of large and medium-sized transport aircraft is much larger than the above example, and has higher requiremen...

Claims

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Application Information

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IPC IPC(8): B05D1/38B05D3/10B05D3/12B05D3/00C09K3/10B64D37/02
Inventor 黄智勇张敬彤段正才王翀邱航波黄如刚
Owner SHAANXI AIRCRAFT CORPORATION
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