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Reliability processing method for metal corrosion calendar life

A metal corrosion and reliability technology, applied in the direction of instruments, computers, look-up devices, etc.

Inactive Publication Date: 2012-07-04
AERONAUTICAL EUIPMENT INST AIR EQUIP ACAD P L A
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, at home and abroad, there is no processing method in this respect, and the present invention is researched under this background

Method used

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  • Reliability processing method for metal corrosion calendar life
  • Reliability processing method for metal corrosion calendar life
  • Reliability processing method for metal corrosion calendar life

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] 1 Through a large number of various metal corrosion tests, the standard deviation of corrosion damage of various materials is obtained

[0017] 2Standard deviation of corrosion damage obtained from the test and related models to obtain the corrosion damage dispersion coefficient L with high reliability and confidence f .

[0018] 3 Through multiple life-determining specimen corrosion tests, the average calendar life H of the test with a reliability of 50% is obtained.

[0019] 4 Use a dispersion coefficient L from Table 4 or Table 5 f Remove the average calendar life H, that is, get the corresponding high reliability and high confidence calendar life H p . i.e. H p =H / L f . It can be seen that the core work of the inventive method is to obtain the standard deviation of corrosion damage of different materials and the corresponding corrosion damage dispersion coefficient with high reliability and high confidence through a large number of corrosion tests. This i...

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Abstract

The invention belongs to the technical field of material invalidation and protection and provides a high-reliability processing method used in the determination of metal structural corrosion calendar life. The method provided by the technical scheme of the invention comprises the following steps of: (1) drawing up a service environment temperature spectrum; (2) determining medium components and solution concentrations for corrosion tests; (3) carrying out the corrosion tests; (4) calculating the average calendar life H of tests with the reliability of 50%; and (5) dividing the average calendar life H of the tests by a corrosion dispersion coefficient Lf given in the method to obtain high-reliability and high-confidence metal structural corrosion calendar life Hp. At present, the method provided by the invention is a high-reliability processing method which is firstly proposed in the determination of the metal corrosion calendar life at home and abroad and used for researching high-reliability and high-confidence dispersion coefficient Lf of corrosion damages and metal calendar life through researching a standard deviation Si of corrosion damage quantity on the basis of corrosion test data of 118 alloy steel specimens and corrosion test data of 100 aluminum alloy corrosion regions. The processing method plays an important role in improving the reliability in the determination of the metal calendar life and is a new development and innovation in the field of determination of the corrosion calendar life.

Description

technical field [0001] The invention belongs to the field of material failure and protection. technical background [0002] In the determination of metal calendar life, a large number of corrosion tests need to be carried out. These test data also have scatter like fatigue test data. In order to obtain high reliability and high confidence calendar life, these scatter must be greatly Corrosion test data for reliability processing. At present, at home and abroad, there is no processing method in this respect, and the present invention is researched under this background. Contents of the invention [0003] 1 Obtain the standard deviation of corrosion damage of some metal materials through a large number of corrosion tests For values, see Tables 1, 2, and 3. [0004] 2 Standard deviation obtained from the test value, the corrosion dispersion coefficient L with high reliability and confidence can be obtained f See Tables 4 and 5 for the values. [0005] 3 and then use t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06C3/00
Inventor 张福泽
Owner AERONAUTICAL EUIPMENT INST AIR EQUIP ACAD P L A
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