Manufacturing method of corrosion reference block and method for determining corrosion damage by using block

A technology for comparing test blocks and production methods, which is applied in the direction of instruments, measuring devices, and material analysis through electromagnetic means, can solve the problems of missed quantification, low accuracy, and difficult detection, so as to prevent missed defects and prevent Inaccurate quantification, the effect of improving sensitivity and accuracy

Pending Publication Date: 2020-06-23
CHINA AIRPLANT STRENGTH RES INST
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Problems solved by technology

However, there are few effective means at present. After searching, only the improvement of eddy current sensor CN104730144A is found, and there is no improvement about the comparison test block. Therefore, it is difficult to detect and the accuracy is not high, which may easily cause missed detection of defects and inaccurate quantification. question

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  • Manufacturing method of corrosion reference block and method for determining corrosion damage by using block
  • Manufacturing method of corrosion reference block and method for determining corrosion damage by using block
  • Manufacturing method of corrosion reference block and method for determining corrosion damage by using block

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Embodiment Construction

[0033] The study found that cracking and corrosion are the main damage forms in various types of damage, while corrosion pits, corrosion areas ( figure 1 ) is often the basic cause of cracking, and stress corrosion, like corrosion fatigue, is the main cause of crack growth.

[0034] In the conventional detection of corrosion damage by the eddy current method, the eddy current detection is actually a detection method based on signal comparison, which requires the signal of the reference object as a reference. The comparison test block is the reference material for determining the detection benchmark in the non-destructive testing process. The study found that it plays a vital role in the determination of the detection parameters, the adjustment of the detection sensitivity, and the evaluation of the detection results. Therefore, the simulated corrosion damage of the comparison test block plays a decisive role in the final result of corrosion detection and damage assessment. Th...

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Abstract

The invention belongs to the technical field of processing and detection, and particularly relates to a manufacturing method of a corrosion reference test block for eddy current testing and a method for determining corrosion damage by using the test block. The method comprises the steps that interlayer corrosion defects on an airplane are obtained, and common characteristics of the interlayer corrosion defects are determined; based on the interlayer corrosion defects and the common characteristics of the interlayer corrosion defects, the structural form of the corrosion reference block and thecharacteristics of the corrosion defects to be processed are determined according to the detection requirements; a corrosion defect on the first plate is formed according to the characteristics of the corrosion defect to be processed to obtain a corrosion plate; and the second plate and the corrosion plate are assembled together according to the structural form of the corrosion reference block toform the corrosion reference block. The test block obtained by the method is used for corrosion damage detection, the sensitivity and accuracy of interlayer corrosion damage detection are improved, the damage degree can be effectively determined, and defect missing detection and inaccurate quantification are prevented.

Description

technical field [0001] The invention belongs to the technical field of processing and detection, and in particular relates to a method for manufacturing a corrosion comparison test block for eddy current detection and a method for determining corrosion damage by using the test block. Background technique [0002] Corrosion defect is a kind of structural damage that often occurs in aircraft and seriously affects the structural strength and life of the aircraft. Many aircraft structural parts are damaged due to corrosion, including wing spars, door frames, landing gear outer cylinders, propeller hubs, broken wings, etc., and even aircraft crashes. The safety of these structures is related to the flight and test safety of the whole aircraft. Corrosion detection, discovery and treatment of corrosion damage on in-service aircraft structures can minimize the more serious consequences caused by corrosion damage. In terms of corrosion damage detection and evaluation: the current r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/90
CPCG01N27/9006
Inventor 黄华斌彭智伟王竹林詹绍正王丹石磊
Owner CHINA AIRPLANT STRENGTH RES INST
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