CN113670963A - Method for preventing low-temperature fracture corrosion - Google Patents
Method for preventing low-temperature fracture corrosion Download PDFInfo
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- CN113670963A CN113670963A CN202110807002.1A CN202110807002A CN113670963A CN 113670963 A CN113670963 A CN 113670963A CN 202110807002 A CN202110807002 A CN 202110807002A CN 113670963 A CN113670963 A CN 113670963A
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- ethyl alcohol
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/2202—Preparing specimens therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/225—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion
- G01N23/2251—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion using incident electron beams, e.g. scanning electron microscopy [SEM]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Sampling And Sample Adjustment (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a method for preventing low-temperature fractures from being rusted, which adopts absolute ethyl alcohol and a plastic beaker which are common reagents in a laboratory, has the advantages of simple method, convenient acquisition and repeated use, does not need a laboratory power supply, an electric blower and the like, does not need additional investment, and can be applied to the protection of low-temperature impact fractures of various metal materials. The method is suitable for fracture protection of various low-temperature test samples, and provides a novel fracture protection method for personnel engaged in experiments and research and development in low-temperature experiments and tests.
Description
Technical Field
The invention relates to a method for preventing low-temperature fracture corrosion.
Background
The low-temperature impact test is an important index for testing the service performance of the metal material under the low-temperature condition. Due to the fact that metal materials have different low-temperature brittleness characteristics, researchers need to conduct further scanning electron microscope detection analysis on low-temperature impact fractures to judge low-temperature failure mechanisms and reasons of the low-temperature impact fractures, and when the scanning electron microscope fractures are analyzed, it is found that the low-temperature fractures are very easy to generate fracture corrosion phenomena, the reason is that low-temperature metal easily enables water vapor in air to be condensed on the surface of a metal sample, namely, the surface of the metal frosts, and the frosted fractures are not dried in time or protective measures are taken to form local corrosion on the fracture surfaces. The conditional laboratory adopts a hair dryer to heat and blow the fracture, but the fracture cannot be completely prevented from rusting due to the unevenness of the fracture and the limitation of the laboratory conditions.
Disclosure of Invention
The invention aims to provide a method for preventing low-temperature fracture corrosion, which can prevent the low-temperature fracture from being corroded due to frosting of water vapor in air on the fracture of a sample and solve the problem that the fracture corrosion easily causes difficulty and misjudgment for subsequent analysis of the fracture of a scanning electron microscope.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention discloses a method for preventing low-temperature fracture corrosion, which comprises the following steps:
1) when a low-temperature impact test is carried out, a clean container is prepared in advance, and a certain amount of absolute ethyl alcohol is poured into the container, so that a sample can be completely immersed in the absolute ethyl alcohol;
2) quickly placing the tested low-temperature impact fracture sample into a beaker filled with absolute ethyl alcohol, standing for a certain time to ensure that the fracture sample returns to a room temperature state from a low-temperature state, fully dissolving the moisture on the surface of the sample in the absolute ethyl alcohol in the process, taking out the fracture sample, and quickly drying the fracture surface of the sample under the volatilization action of the absolute ethyl alcohol;
3) the fracture sample after being taken out is a normal-temperature sample, and the absolute ethyl alcohol is rapidly volatilized, so that the surface of the fracture of the sample can not be frosted, the corrosion of the fracture is avoided, and the fracture sample treated by the steps can be directly observed by a scanning electron microscope or stored in a metallographic sample dryer for later use.
Further, the container is a beaker and the capacity is 500 mL.
Further, the tested low-temperature impact fracture sample is quickly placed into a beaker filled with absolute ethyl alcohol for 3-5min in the step 2).
Further, the amount of the absolute ethyl alcohol is 100-200 ml.
Compared with the prior art, the invention has the beneficial technical effects that:
the method adopts absolute ethyl alcohol and plastic beakers which are common reagents in laboratories, is simple, convenient to obtain and reusable, does not need laboratory power supplies, electric blowers and the like, does not need additional investment, and can be applied to the protection of low-temperature impact fractures of various metal materials.
The method is suitable for fracture protection of various low-temperature test samples, and provides a novel fracture protection method for personnel engaged in experiments and research and development in low-temperature experiments and tests.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a photograph of a sample frosting;
FIG. 2 is a fracture morphology plot of a sample placed for a week;
FIG. 3 is a photograph showing a water drop on the outer surface of the sample;
FIG. 4 is a scanning electron microscope fracture observation analysis chart.
Detailed Description
A group of 3 low-temperature impact samples with the numbers of 1#, 2#, and 3# are selected, a 500ml clean plastic beaker is prepared, and 100ml of absolute ethyl alcohol is poured into the beaker. And sequentially carrying out a-40 ℃ low-temperature impact test on the 1#, 2#, and 3# samples. The method comprises the following steps that no treatment is carried out after the impact test of the No. 1 sample is broken, the No. 2 sample is placed into a beaker after the impact test of the No. 2 sample is broken for 1 minute, and the No. 3 sample is immediately placed into the beaker after the impact test of the No. 3 sample is broken; the surfaces of the samples No. 1 and No. 2 rapidly frosted on the surfaces of the samples due to the low temperature, as shown in FIG. 1; putting the frosted 2# sample into a beaker; after a few minutes, observing a No. 1 sample, wherein water drops are arranged on the outer surface of the sample, and a water film is covered on the fracture surface, as shown in figure 3; the samples 2# and 3# placed in the beaker are taken out after being placed for 3-5 minutes, and the fracture surfaces of the samples are quickly dried due to strong volatilization of the absolute ethyl alcohol. FIG. 2 is the fracture morphology of the 1#, 2# and 3# samples that were left for a week, the 1# sample fracture face having developed a yellow rust while the 2# and 3# fractures were intact.
Observing fractures of the No. 1, No. 2 and No. 3 samples by using a scanning electron microscope, observing the fracture surface of the No. 1 sample in an amplification way to obtain obvious corrosion, and analyzing an energy spectrum to obtain corrosion products mainly containing Fe and O; no rust is observed at the fracture of the 2# and 3# samples, which are shown in groups 4a, b, c and d.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (4)
1. A method for preventing low-temperature fracture corrosion is characterized by comprising the following steps:
1) when a low-temperature impact test is carried out, a clean container is prepared in advance, and a certain amount of absolute ethyl alcohol is poured into the container, so that a sample can be completely immersed in the absolute ethyl alcohol;
2) quickly placing the tested low-temperature impact fracture sample into a beaker filled with absolute ethyl alcohol, standing for a certain time to ensure that the fracture sample returns to a room temperature state from a low-temperature state, fully dissolving the moisture on the surface of the sample in the absolute ethyl alcohol in the process, taking out the fracture sample, and quickly drying the fracture surface of the sample under the volatilization action of the absolute ethyl alcohol;
3) the fracture sample after being taken out is a normal-temperature sample, and the absolute ethyl alcohol is rapidly volatilized, so that the surface of the fracture of the sample can not be frosted, the corrosion of the fracture is avoided, and the fracture sample treated by the steps can be directly observed by a scanning electron microscope or stored in a metallographic sample dryer for later use.
2. The method of preventing low temperature fracture corrosion according to claim 1, wherein the vessel is a beaker.
3. The method for preventing low-temperature fracture corrosion according to claim 1, wherein the tested low-temperature impact fracture sample is quickly placed into a beaker filled with absolute ethyl alcohol for 3-5min in the step 2).
4. The method for preventing corrosion at a low temperature fracture as claimed in claim 1, wherein the amount of the absolute ethanol is 100-200 ml.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110807002.1A CN113670963A (en) | 2021-07-16 | 2021-07-16 | Method for preventing low-temperature fracture corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110807002.1A CN113670963A (en) | 2021-07-16 | 2021-07-16 | Method for preventing low-temperature fracture corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113670963A true CN113670963A (en) | 2021-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110807002.1A Pending CN113670963A (en) | 2021-07-16 | 2021-07-16 | Method for preventing low-temperature fracture corrosion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115025957A (en) * | 2022-05-25 | 2022-09-09 | 包头钢铁（集团）有限责任公司 | Method for improving corrosion resistance of non-passivated galvanized plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1506673A (en) * | 2002-12-10 | 2004-06-23 | 北京有色金属研究总院 | Low temperature brittleness test method for zinc anode belt |
| JP2006274318A (en) * | 2005-03-28 | 2006-10-12 | Kobe Steel Ltd | High strength hot rolled steel sheet having excellent hole expansion workability, and method for producing the same |
| CN110806357A (en) * | 2019-11-13 | 2020-02-18 | 中国石油大学(华东) | Method for evaluating high-temperature creep damage based on low-temperature fracture |
| CN111076993A (en) * | 2019-12-12 | 2020-04-28 | 重庆市城投路桥管理有限公司 | Sample fracture treatment method |
-
2021
- 2021-07-16 CN CN202110807002.1A patent/CN113670963A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1506673A (en) * | 2002-12-10 | 2004-06-23 | 北京有色金属研究总院 | Low temperature brittleness test method for zinc anode belt |
| JP2006274318A (en) * | 2005-03-28 | 2006-10-12 | Kobe Steel Ltd | High strength hot rolled steel sheet having excellent hole expansion workability, and method for producing the same |
| CN110806357A (en) * | 2019-11-13 | 2020-02-18 | 中国石油大学(华东) | Method for evaluating high-temperature creep damage based on low-temperature fracture |
| CN111076993A (en) * | 2019-12-12 | 2020-04-28 | 重庆市城投路桥管理有限公司 | Sample fracture treatment method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115025957A (en) * | 2022-05-25 | 2022-09-09 | 包头钢铁（集团）有限责任公司 | Method for improving corrosion resistance of non-passivated galvanized plate |
| CN115025957B (en) * | 2022-05-25 | 2023-02-21 | 包头钢铁（集团）有限责任公司 | Method for improving corrosion resistance of non-passivated galvanized plate |
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