CN101482480A - Metal corrosion isothermal isochron and test method - Google Patents
Metal corrosion isothermal isochron and test method Download PDFInfo
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- CN101482480A CN101482480A CNA2008100001009A CN200810000100A CN101482480A CN 101482480 A CN101482480 A CN 101482480A CN A2008100001009 A CNA2008100001009 A CN A2008100001009A CN 200810000100 A CN200810000100 A CN 200810000100A CN 101482480 A CN101482480 A CN 101482480A
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- isochrone
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Abstract
The invention provides a metal corrosion isothermal isochrone and testing method thereof, belonging to the material failure and protection technical field, which mainly solves the determination problem of the corrosion calendar life of the metal structure in application environment. The metal corrosion isothermal isochrone can be saw in the abstract attached drawing, the horizontal scale represents the corrosion solution concentration d and the longitudinal scale represents the corrosion damage amount D. Because the d is equal to 0, then the D is equal to 0, thus the isothermal isochrone is a zeroaxial right line. The physical meaning of the isothermal isochrone is that: the time and temperature hold the line and the corrosion damage D shows a linear increase along with the solution concentration d, during the corrosion testing process of each solution concentration of metal. On the linear line, the temperature of each point is equal to the time of each point, thus the line is called as isothermal isochrone. The isothermal isochrone is found to directly induce a computation model of metal calendar life in application environment; and also performs the equivalent conversion into the application result in the application environment from the high-concentration corrosion test result.
Description
Affiliated technical field
The invention belongs to material failure and resist technology field.
Technical background
Be a lot of in the research aspect the metal erosion inefficacy both at home and abroad; be in the majority mostly in aspect researchs such as corrosion failure microscopic mechanism, failure mode, failure effect factor, inefficacy rule and guard methods; but determine that at metal erosion inefficacy calendar life the research of method is less, and can be still rare for the successful methods that engineering is used.The present invention be directed to the metal erosion calendar life and determine method research.
Summary of the invention
The present invention finds a kind of isothermal time line of the metal erosion as Figure of description 1.Horizontal ordinate in the accompanying drawing 1 is etchant solution concentration d (environment for use d=1, experimental enviroment d is desirable much larger than 1 solution concentration), and ordinate is corrosion damage D.Because d=0, then D=0, so isothermal time line is the straight line by true origin.The isochronal physical meaning of isothermal is, in the corrosion test process of each grade of metal solution concentration, temperature and time to remain unchanged, and corrosion damage D increases with solution concentration d and is linear and increases.On this linear line, temperature and time more arbitrarily all equates, so claim the isothermal time line.Meanwhile, also work out the method for testing of metal corrosion isothermal isochron.Promptly use the testing liquid of three kinds of high concentrations, under the serviceability temperature spectrum, carry out the corrosion test of three groups of metal specimen, can draw the isothermal time line.Find this isothermal time line, define significance for the computation model and the calendar life that provide the metal calendar life under the environment for use by corrosion test, simultaneously also can be directly from the corrosion test result of high concentration, the use result of equivalent conversion under the environment for use.
Description of drawings
Accompanying drawing 1 is the synoptic diagram of metal corrosion isothermal isochron.Accompanying drawing 2 and accompanying drawing 3 are respectively the isothermal time lines of the corrosion test actual measurement of LY12CZ aluminium alloy and A3 steel.Their ordinate is metal erosion amount of damage D, and horizontal ordinate is etchant solution concentration d.
Specific embodiments
The method of testing of metal corrosion isothermal isochron: 1. at d
2Under the concentration, carry out the corrosion test of one group of metal specimen to use TEMPERATURE SPECTROSCOPY, the test hourage is H
t, record corrosion damage D thus
2t2. at d
3Under the concentration, carry out the corrosion test of one group of metal specimen to use TEMPERATURE SPECTROSCOPY, the test hourage is H
t, record corrosion damage D thus
3t3. at d
4Under the concentration, carry out the corrosion test of one group of metal specimen to use TEMPERATURE SPECTROSCOPY, the test hourage is H
t, record corrosion damage D thus
4t4. respectively d
2, d
3, d
4With the D that records
ItEach value is drawn in the D-d coordinate system, just obtains the isothermal time line in the accompanying drawing 1.5. correct for the existence of verifying metal corrosion isothermal isochron and method of testing with above-mentioned isothermal time line method of testing, carried out the corrosion test of LY12CZ aluminium alloy and two kinds of materials of A3 steel, and trial curve is seen Fig. 2 and the Fig. 3 in the description of drawings.From the trial curve of these two kinds of materials as can be seen, there is the isothermal time line really in metal erosion, illustrates that also this isothermal time line method of testing is correct available.
Claims (1)
- Technical characterictic of the present invention, it takes the lead in finding the feature of metal corrosion isothermal isochron, utilizes the isochronal characteristic of this isothermal, can derive the metal calendar life computation model under the environment for use, calculates for the metal calendar life and uses:The scope that the present invention asks for protection is the metal corrosion isothermal isochron method of testing:1. at d 2Under the concentration, carry out the corrosion test of one group of metal specimen to use TEMPERATURE SPECTROSCOPY, the test hourage is H t, record corrosion damage D thus 2t2. at d 3Under the concentration, carry out the corrosion test of one group of metal specimen to use TEMPERATURE SPECTROSCOPY, the test hourage is H t, record corrosion damage D thus 3t3. at d 4The concentration Bian carries out the corrosion test of one group of metal specimen to use TEMPERATURE SPECTROSCOPY, and the test hourage is H t, record corrosion damage D thus 4t4. draw the isothermal time line.According to above-mentioned test findings, respectively d 2, d 3, d 4With the D that records ItEach value is drawn in the D-d coordinate system, just obtains the isothermal time line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100001009A CN101482480A (en) | 2008-01-07 | 2008-01-07 | Metal corrosion isothermal isochron and test method |
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| CNA2008100001009A CN101482480A (en) | 2008-01-07 | 2008-01-07 | Metal corrosion isothermal isochron and test method |
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| CN101482480A true CN101482480A (en) | 2009-07-15 |
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| CNA2008100001009A Pending CN101482480A (en) | 2008-01-07 | 2008-01-07 | Metal corrosion isothermal isochron and test method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192875A (en) * | 2010-03-02 | 2011-09-21 | 中国人民解放军空军装备研究院航空装备研究所 | Method for making relative humidity and hour (RH-H) curve of service environment |
| CN103995099A (en) * | 2014-04-17 | 2014-08-20 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining equivalent relationship between artificial acceleration and in-service ageing of organic glass |
-
2008
- 2008-01-07 CN CNA2008100001009A patent/CN101482480A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192875A (en) * | 2010-03-02 | 2011-09-21 | 中国人民解放军空军装备研究院航空装备研究所 | Method for making relative humidity and hour (RH-H) curve of service environment |
| CN103995099A (en) * | 2014-04-17 | 2014-08-20 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining equivalent relationship between artificial acceleration and in-service ageing of organic glass |
| CN103995099B (en) * | 2014-04-17 | 2015-11-18 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of method determined organic glass artificial acceleration and use aging equivalent relation |
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Application publication date: 20090715 |