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A scratch detection method for aircraft aluminum alloy skin surface

A detection method, the technology of aluminum alloy, which is applied in the direction of analyzing the material through chemical reaction and material analysis through observing the influence on the chemical indicator, which can solve the problems of large parts, inability to cut and sample inspection, etc.

Active Publication Date: 2017-09-26
HARBIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As for the judgment of the scratch depth, since the parts are very large, they cannot be cut and sampled for inspection, and there is no effective method abroad. The only way to determine whether the aluminum clad layer is scratched is through chemical methods, so as to determine the degree of scratches.

Method used

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0022] Using the aircraft aluminum alloy skin surface scratch detection method of the present invention to detect scratches on the 2024 aluminum alloy skin surface, the specific steps are:

[0023] 1) Prepare display solution 1: use 200g potassium nitrate + 100g sodium hydroxide, dilute to 1L with deionized water;

[0024] 2) Prepare display solution 2: use 100ml HNO3+200 to 300ml H2O;

[0025] 3) Preparation of neutralization solution: use 50g of chromic acid and dilute to 1L with deionized water;

[0026] 4) According to the traces on the surface of the parts, visually inspect and determine the suspected scratches;

[0027] 5) Remove dust and wipe the suspected scratched parts with a clean cloth;

[0028] 6) Clean the surface of the skin with butanone, and use adhesive tape to isolate the area beyond 3...

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PUM

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Abstract

The invention discloses a method for detecting scratches on the surface of an aircraft aluminum alloy skin. Firstly, two kinds of display solutions and neutralization solutions are prepared, and then dust is removed from the surface of parts, and then the suspected scratched parts are isolated, and one drop is added to the suspected scratched parts. Good display solution 1, rinse and check the color of the suspected scratched part, then drip display solution 2, rinse the suspected scratched part with clean water, neutralize, rinse and dry, after drying, determine according to whether the suspected scratched part is black Whether the skin is scratched. The method for detecting scratches on the surface of the aircraft aluminum alloy skin of the invention can correctly identify the scratches on the surface of the aluminum alloy skin through corrosion display detection and control the product quality.

Description

technical field [0001] The invention belongs to the field of physical and chemical detection of aluminum alloys, and in particular relates to a method for detecting scratches on the surface of an aircraft aluminum alloy skin. Background technique [0002] At present, domestic aircraft skin scratches have always been observed by manual visual inspection. Such a manual detection method cannot accurately determine the depth of skin scratches and whether the aluminum-clad layer has been pierced, and there is no reliable basis for subsequent troubleshooting. In addition, there is currently no corresponding physical and chemical detection method for aircraft skin scratches in China. [0003] In foreign technologies, there are physical and chemical detection methods to solve the surface scratches of aluminum alloy skin. This method needs to cut the part, and determine the degree of corrosion of the part through chemical corrosion and chemical reaction. As for the judgment of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
Inventor 马飞亚陈国权宫晨钊李佳珊韩雪
Owner HARBIN
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