CN105466844A - Aluminum lithium alloy corrosion resistance evaluation method - Google Patents
Aluminum lithium alloy corrosion resistance evaluation method Download PDFInfo
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- CN105466844A CN105466844A CN201510846153.2A CN201510846153A CN105466844A CN 105466844 A CN105466844 A CN 105466844A CN 201510846153 A CN201510846153 A CN 201510846153A CN 105466844 A CN105466844 A CN 105466844A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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Abstract
The invention discloses an aluminum lithium alloy corrosion resistance evaluation method. The aluminum lithium alloy corrosion resistance evaluation method comprises the following steps: step 1, dividing to-be-detected aluminum lithium alloy parts into groups; step 2, carrying out salt-spray corrosion or alternate immersion tests; step 3, observing each group of to-be-detected aluminum lithium alloy parts until white rust appears on any one to-be-detected aluminum lithium alloy part in one group, and taking out the group of to-be-detected aluminum lithium alloy parts; step 4, taking out one group of to-be-detected aluminum lithium alloy parts at preset time intervals; step 5, collecting corrosion parameters of each to-be-detected aluminum lithium alloy part; step 6, forming fatigue test groups and static test groups; step 7, carrying out residual life tests, so as to acquire the residual life of each to-be-detected aluminum lithium alloy part; step 8, carrying out residual strength tests, so as to acquire the residual strength of each to-be-detected aluminum lithium alloy part. According to the aluminum lithium alloy corrosion resistance evaluation method, provided by the invention, relationships between corrosion parameters and the residual strength as well as between the corrosion parameters and the residual life are established, therefore a foundation is provided for equipment maintenance.
Description
Technical field
The present invention relates to aluminium lithium alloy technical field, be specifically related to a kind of aluminium lithium alloy decay resistance evaluation method.
Background technology
Aluminium lithium alloy has the advantage of low-density, high specific strength and high specific stiffness, is widely used in aerospace field.The decay resistance evaluation method of aluminium lithium alloy, the most frequently used to evaluation index be corroded area, erosion profile, corrosion class, etching time etc., domestic GB/T10125 and HB5194 etc. have detailed regulation.Current evaluation method, when corrosion occurs part, carries out effectively evaluating to its mechanical property degree of injury, can not provide reliable foundation for formulation equipment maintenance and maintenance program.
Therefore, wish a kind of technical scheme to overcome or at least alleviate at least one the problems referred to above of prior art.
Summary of the invention
A kind of aluminium lithium alloy decay resistance evaluation method is the object of the present invention is to provide to overcome or at least alleviate at least one the problems referred to above of the prior art.
For achieving the above object, the invention provides a kind of aluminium lithium alloy decay resistance evaluation method, described aluminium lithium alloy decay resistance evaluation method comprises the steps: step 1: divided into groups by aluminium lithium alloy part to be measured, thus form many groups aluminium lithium alloy part group to be measured, often group comprises multiple aluminium lithium alloy part to be measured; Step 2: salt air corrosion or alternate-immersion test are carried out to each group of aluminium lithium alloy part group to be measured; Step 3: observe each group of aluminium lithium alloy part group to be measured, until white rust appears in any one the aluminium lithium alloy part to be measured wherein in a group, thus takes out this group aluminium lithium alloy part to be measured group; Step 4: after described step 3, takes out one group of aluminium lithium alloy part group to be measured every the schedule time; Step 5: the corrosion parameter gathering the aluminium lithium alloy part to be measured often organized in aluminium lithium alloy part group to be measured; Step 6: divide into groups often organizing aluminium lithium alloy part group to be measured, thus form torture test group and slow test group; Step 7: residual life test is carried out to each torture test group in described step 6, thus obtain the residual life of each aluminium lithium alloy part to be measured in torture test group; Step 8: residual intensity test is carried out to each slow test group in described step 6, thus obtain the residual intensity of each aluminium lithium alloy part to be measured in slow test group.
Preferably, the salt air corrosion in described step 2 or alternate-immersion test adopt GB/T10125 or HB5194 method to carry out.
Preferably, the schedule time in described step 4 is 24 hours.
Preferably, described corrosion parameter comprises: surrosion, corroded area measurement, erosion profile analysis, calculating corrosion rate, effects on surface corrosion class and etching time.
Preferably, in described step 1, often organize aluminium lithium alloy part group to be measured and at least comprise 5 to 10 aluminium lithium alloy parts to be measured.
Preferably, the torture test group in described step 6 at least comprises 2 to 3 aluminium lithium alloy parts to be measured; Often organize in slow test group and at least comprise 3 to 5 aluminium lithium alloy parts to be measured.
Preferably, the residual life test in described step 7 adopts HB5287 method to test.
Preferably, the residual intensity test in described step 8 adopts GB/T228.1 method to test.
The invention provides a kind of aluminium lithium alloy decay resistance evaluation method, set up corrosion parameter and the relation between residual intensity and residual life, for equipment maintenance maintenance provides foundation.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of aluminium lithium alloy decay resistance evaluation method according to a first embodiment of the present invention.
Embodiment
For making object of the invention process, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Described embodiment is the present invention's part embodiment, instead of whole embodiments.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.
In describing the invention; it will be appreciated that; term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limiting the scope of the invention.
Fig. 1 is the schematic flow sheet of aluminium lithium alloy decay resistance evaluation method according to a first embodiment of the present invention.
Aluminium lithium alloy decay resistance evaluation method as shown in Figure 1 comprises the steps: step 1: divided into groups by aluminium lithium alloy part to be measured, thus forms many groups aluminium lithium alloy part group to be measured, and often group comprises multiple aluminium lithium alloy part to be measured; Step 2: salt air corrosion or alternate-immersion test are carried out to each group of aluminium lithium alloy part group to be measured; Step 3: observe each group of aluminium lithium alloy part group to be measured, until white rust appears in any one the aluminium lithium alloy part to be measured wherein in a group, thus takes out this group aluminium lithium alloy part to be measured group; Step 4: after step 3, takes out one group of aluminium lithium alloy part group to be measured every the schedule time; Step 5: the corrosion parameter gathering the aluminium lithium alloy part to be measured often organized in aluminium lithium alloy part group to be measured; Step 6: divide into groups often organizing aluminium lithium alloy part group to be measured, thus form torture test group and slow test group; Step 7: residual life test is carried out to each torture test group in step 6, thus obtain the residual life of each aluminium lithium alloy part to be measured in torture test group; Step 8: residual intensity test is carried out to each slow test group in step 6, thus obtain the residual intensity of each aluminium lithium alloy part to be measured in slow test group.
In the present embodiment, the salt air corrosion in step 2 or alternate-immersion test adopt GB/T10125 or HB5194 method to carry out.Be understandable that, also can carry out salt air corrosion or alternate-immersion test by additive method.
In the present embodiment, the schedule time in described step 4 is 24 hours.Be understandable that, this time can as required and from Row sum-equal matrix.Such as, this time can be 12 hours, 36 hours.Shorter when the time, its data obtained are more accurate.
In the present embodiment, described corrosion parameter comprises: surrosion, corroded area measurement, erosion profile analysis, calculating corrosion rate, effects on surface corrosion class and etching time.Be understandable that, above-mentioned parameter all can be obtained by prior art, does not repeat them here.
In the present embodiment, in described step 1, often organize aluminium lithium alloy part group to be measured and at least comprise 5 to 10 aluminium lithium alloy parts to be measured.Be appreciated that ear is, above-mentioned quantity can sets itself as required.Such as, 7,8,9,12 or more.Be understandable that, quantity is more, and the data obtained are more accurate.
In the present embodiment, the torture test group in described step 6 at least comprises 2 to 3 aluminium lithium alloy parts to be measured; Often organize in slow test group and at least comprise 3 to 5 aluminium lithium alloy parts to be measured.Be understandable that, the quantity of the aluminium lithium alloy part in the quantity of the aluminium lithium alloy part to be measured in slow test group and torture test group is determined according to the quantity of aluminium lithium alloy part to be measured in aluminium lithium alloy part group to be measured.Under normal circumstances, the aluminium lithium alloy number of parts in slow test group is more than torture test group.
In the present embodiment, the residual life test in described step 7 adopts HB5287 method to test.Be understandable that, residual life test can also be carried out by additive method.
In the present embodiment, the residual intensity test in described step 8 adopts GB/T228.1 method to test.Be understandable that, residual intensity test can also be carried out by additive method.
Finally it is to be noted: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit.Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. an aluminium lithium alloy decay resistance evaluation method, is characterized in that, described aluminium lithium alloy decay resistance evaluation method comprises the steps:
Step 1: aluminium lithium alloy part to be measured is divided into groups, thus form many groups aluminium lithium alloy part group to be measured, often group comprises multiple aluminium lithium alloy part to be measured;
Step 2: salt air corrosion or alternate-immersion test are carried out to each group of aluminium lithium alloy part group to be measured;
Step 3: observe each group of aluminium lithium alloy part group to be measured, until white rust appears in any one the aluminium lithium alloy part to be measured wherein in a group, thus takes out this group aluminium lithium alloy part to be measured group;
Step 4: after described step 3, takes out one group of aluminium lithium alloy part group to be measured every the schedule time;
Step 5: the corrosion parameter gathering the aluminium lithium alloy part to be measured often organized in aluminium lithium alloy part group to be measured;
Step 6: divide into groups often organizing aluminium lithium alloy part group to be measured, thus form torture test group and slow test group;
Step 7: residual life test is carried out to each torture test group in described step 6, thus obtain the residual life of each aluminium lithium alloy part to be measured in torture test group;
Step 8: residual intensity test is carried out to each slow test group in described step 6, thus obtain the residual intensity of each aluminium lithium alloy part to be measured in slow test group.
2. aluminium lithium alloy decay resistance evaluation method as claimed in claim 1, is characterized in that, the salt air corrosion in described step 2 or alternate-immersion test adopt GB/T10125 or HB5194 method to carry out.
3. aluminium lithium alloy decay resistance evaluation method as claimed in claim 1, it is characterized in that, the schedule time in described step 4 is 24 hours.
4. aluminium lithium alloy decay resistance evaluation method as claimed in claim 1, it is characterized in that, described corrosion parameter comprises: surrosion, corroded area measurement, erosion profile analysis, calculating corrosion rate, effects on surface corrosion class and etching time.
5. aluminium lithium alloy decay resistance evaluation method as claimed in claim 1, is characterized in that, in described step 1, often organize aluminium lithium alloy part group to be measured and at least comprise 5 to 10 aluminium lithium alloy parts to be measured.
6. aluminium lithium alloy decay resistance evaluation method as claimed in claim 5, it is characterized in that, the torture test group in described step 6 at least comprises 2 to 3 aluminium lithium alloy parts to be measured; Often organize in slow test group and at least comprise 3 to 5 aluminium lithium alloy parts to be measured.
7. aluminium lithium alloy decay resistance evaluation method as claimed in claim 1, is characterized in that, the residual life test in described step 7 adopts HB5287 method to test.
8. volume aluminium lithium alloy decay resistance evaluation method as claimed in claim 1, is characterized in that, the residual intensity test in described step 8 adopts GB/T228.1 method to test.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987784A (en) * | 2019-12-06 | 2020-04-10 | 西北工业大学 | Quantitative characterization method for electrochemical corrosion resistance of nickel-based alloy |
| CN115718061A (en) * | 2022-11-25 | 2023-02-28 | 中国特种设备检测研究院 | Method, system and equipment for evaluating corrosion layer of heat-resistant steel material |
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| CN1590980A (en) * | 2003-09-05 | 2005-03-09 | 中国科学院海洋研究所 | Evaluation method of hot dipping layer corrosiveness |
| JP2010025560A (en) * | 2008-07-15 | 2010-02-04 | Hitachi Ltd | Corrosion resistance evaluating method of metal material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110987784A (en) * | 2019-12-06 | 2020-04-10 | 西北工业大学 | Quantitative characterization method for electrochemical corrosion resistance of nickel-based alloy |
| CN115718061A (en) * | 2022-11-25 | 2023-02-28 | 中国特种设备检测研究院 | Method, system and equipment for evaluating corrosion layer of heat-resistant steel material |
| CN115718061B (en) * | 2022-11-25 | 2024-05-03 | 中国特种设备检测研究院 | Method, system and equipment for evaluating corrosion layer of heat-resistant steel material |
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Inventor after: Yang Xu Inventor after: Li Haitao Inventor after: Xu Guangxing Inventor after: Jing Lulu Inventor after: Liu Hongtao Inventor before: Yang Xu Inventor before: Li Haitao Inventor before: Xu Guangxing Inventor before: Jing Lvlu Inventor before: Liu Hongtao |
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