CN115128112A - Experimental method for eliminating corrosion on surface of fracture of steel rail - Google Patents
Experimental method for eliminating corrosion on surface of fracture of steel rail Download PDFInfo
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- CN115128112A CN115128112A CN202210706628.8A CN202210706628A CN115128112A CN 115128112 A CN115128112 A CN 115128112A CN 202210706628 A CN202210706628 A CN 202210706628A CN 115128112 A CN115128112 A CN 115128112A
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- hydrochloric acid
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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
- 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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Abstract
The invention discloses an experimental method for eliminating the corrosion on the fracture surface of a steel rail, which comprises the following steps: 1) placing a beaker containing hydrochloric acid on an alcohol lamp and heating to 20 ℃; 2) slightly brushing the rusted sample by dipping the heated hydrochloric acid with a brush, so that the rust on the surface of the fracture can be quickly removed; 3) carrying out ultrasonic cleaning on the brushed sample to prevent hydrochloric acid from continuously corroding fracture matrixes after the embroidery on the surface is completely removed; 4) after being cleaned and dried by a blower, the film can be directly placed into a scanning electron microscope for fracture analysis. The method is simple and convenient to operate, and can effectively and quickly remove the corrosion on the surface of the fracture.
Description
Technical Field
The invention relates to an experimental method for eliminating corrosion on the fracture surface of a steel rail.
Background
The analysis of the steel rail fracture by a scanning electron microscope is widely used in the steel rail research and development process as a common detection method for analyzing the steel rail fracture reason. For example, a steel rail base metal drop hammer experiment, a steel rail welding seam drop hammer experiment, a steel rail crack propagation rate experiment, a steel rail fracture toughness experiment and the like are all important indexes for reflecting the quality of the steel rail, and fracture forms after different steel rail experiments are deeply analyzed and researched by a scanning electron microscope, so that the fracture reasons can be judged, the problem of steel rail fracture is solved, the components of the steel rail are optimized, and the steel rail with better performance is obtained.
When the steel rail fracture is analyzed by a scanning electron microscope, the steel rail fracture needs to be cut into smaller samples, but due to the cutting particularity, the cut samples are easy to rust, rusted fractures cannot be analyzed by the scanning electron microscope, and therefore rust removal needs to be carried out before analysis. The rust layer is attached to the uneven fracture surface, so that the steel plate is not easy to clean by spraying or high-pressure water washing and has residual Fe 2 O 3 . The chemical method usually used includes soaking the fracture with acid (such as hydrochloric acid, citric acid, etc.) + corrosion inhibitor (such as lecithin suspension, etc.), etc. However, the method is easy to damage the original appearance of the fracture, needs strict soaking time, needs to be taken out and observed continuously in the soaking process, has low efficiency, and cannot achieve good rust layer removing effect. Therefore, the invention provides an experimental method for eliminating the fracture rust layer, the fracture rust layer can be quickly removed, the appearance of the fracture is not damaged, the problem that the fracture is difficult to remove due to rust is solved, the sample preparation difficulty is reduced, and the experimental process is accelerated.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an experimental method for eliminating the corrosion on the surface of a steel rail fracture.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to an experimental method for eliminating corrosion on the surface of a fracture of a steel rail, which comprises the following steps:
1) placing a beaker containing hydrochloric acid on an alcohol lamp and heating to 20 ℃;
2) slightly brushing the rusted sample by dipping the heated hydrochloric acid with a brush, so that the rust on the surface of the fracture can be quickly removed;
3. carrying out ultrasonic cleaning on the brushed sample to prevent hydrochloric acid from continuously corroding fracture matrixes after the embroidery on the surface is completely removed;
4. after cleaning, the fracture is dried by a blower and can be directly placed into a scanning electron microscope for fracture analysis.
Further, the concentration of the hydrochloric acid is 5-20%.
Further, the concentration of the hydrochloric acid is 10%.
Compared with the prior art, the invention has the beneficial technical effects that:
the method is simple, convenient to operate and capable of effectively and quickly removing the corrosion on the surface of the fracture.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is the morphology of the sample before brushing in example 1;
FIG. 2 is the morphology of the samples after brushing in example 1.
Detailed Description
Example 1
An experimental method for eliminating the corrosion on the surface of a steel rail fracture comprises the following steps:
1) preparing the material
In order to ensure the integrity of the fracture morphology, a soft brush, hydrochloric acid with the concentration of 10%, a beaker and an alcohol lamp are prepared.
2) Experimental methods
1. Placing a beaker containing 10% hydrochloric acid on an alcohol burner, heating to about 20 deg.C, wherein the heated hydrochloric acid can accelerate the reaction with Fe in the rust layer 2 O 3 Reaction occurs, so that the rust layer on the surface of the fracture can be quickly removed (6HCl + Fe) 2 O 3 ＝2FeCl 3 +3H 2 O), the concentration of hydrochloric acid is not easy to be over-concentrated or over-diluted, because the hydrochloric acid with high concentration has strong volatility and the rust removal speed of the over-diluted hydrochloric acid is very slow.
2. The rusted sample after cutting is slightly brushed by dipping heated hydrochloric acid with a brush, and the rust on the surface of the fracture can be rapidly removed, as shown in fig. 1 and fig. 2. It is not easy to put the tarnish sample in a beaker for a long time to soak because if it is too long, hydrochloric acid will react with iron: 2HCl + Fe ═ FeCl 2 +H 2 ℃. # can influence fracture morphology.
3. And (4) carrying out ultrasonic cleaning on the brushed sample to prevent hydrochloric acid from continuously corroding fracture matrixes after the embroidery on the surface is completely removed.
4. After cleaning, the fracture is dried by a blower and can be directly placed into a scanning electron microscope for fracture analysis.
Example 2
An experimental method for eliminating the corrosion on the surface of a steel rail fracture comprises the following steps:
1) preparing the material
In order to ensure the integrity of the fracture morphology, a soft brush, hydrochloric acid with the concentration of 10%, a beaker and an alcohol lamp are prepared.
2) Experimental methods
1. Placing the beaker containing 8% hydrochloric acid on an alcohol burner, heating to about 20 deg.C, wherein the heated hydrochloric acid can accelerate the reaction with Fe in the rust layer 2 O 3 The reaction is carried out, so that the rust layer on the surface of the fracture can be rapidly removed (6HCl + Fe) 2 O 3 ＝2FeCl 3 +3H 2 O), the concentration of hydrochloric acid is not easy to be over-concentrated or over-diluted, because the hydrochloric acid with high concentration has strong volatility and the over-diluted hydrochloric acid has slow rust removal speed.
2. And (3) dipping the heated hydrochloric acid by using a brush to slightly brush the rusted sample, so that the rust on the surface of the fracture can be quickly removed. It is not easy to put the tarnish sample in a beaker for a long time to soak because if it is too long, hydrochloric acid will react with iron: 2HCl + Fe ═ FeCl 2 +H 2 ℃. # can influence fracture morphology.
3. And (4) carrying out ultrasonic cleaning on the brushed sample to prevent hydrochloric acid from continuously corroding fracture matrixes after the embroidery on the surface is completely removed.
4. After cleaning, the film is dried by a blower, and then the film can be directly placed into a scanning electron microscope for fracture analysis.
Example 3
An experimental method for eliminating the corrosion on the surface of a steel rail fracture comprises the following steps:
1) preparing the material
In order to ensure the integrity of the fracture morphology, a soft brush, hydrochloric acid with the concentration of 10%, a beaker and an alcohol lamp are prepared.
2) Experimental method
1. Heating a beaker containing 12% hydrochloric acid to about 20 deg.C with alcohol burner, and collecting the heated saltThe acid can accelerate and rust Fe in the layer 2 O 3 The reaction is carried out, so that the rust layer on the surface of the fracture can be rapidly removed (6HCl + Fe) 2 O 3 ＝2FeCl 3 +3H 2 O), the concentration of hydrochloric acid is not easy to be over-concentrated or over-diluted, because the hydrochloric acid with high concentration has strong volatility and the rust removal speed of the over-diluted hydrochloric acid is very slow.
2. And (3) dipping the heated hydrochloric acid by using a brush to slightly brush the rusted test sample after cutting, so that the rust on the surface of the fracture can be quickly removed. It is not easy to put the tarnish sample in a beaker for a long time to soak because if it is too long, hydrochloric acid will react with iron: 2HCl + Fe ═ FeCl 2 +H 2 ×) can affect fracture morphology.
3. And (4) carrying out ultrasonic cleaning on the brushed sample to prevent hydrochloric acid from continuously corroding fracture matrixes after the embroidery on the surface is completely removed.
4. After cleaning, the film is dried by a blower, and then the film can be directly placed into a scanning electron microscope for fracture analysis. 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 (3)
1. An experimental method for eliminating the corrosion on the surface of a steel rail fracture is characterized in that: the method comprises the following steps:
1) placing the beaker filled with the hydrochloric acid on an alcohol lamp and heating to 20 ℃;
2) slightly brushing the cut rusted sample by dipping the heated hydrochloric acid with a brush to quickly remove the rust on the surface of the fracture;
3) carrying out ultrasonic cleaning on the brushed sample to prevent hydrochloric acid from continuously corroding fracture matrixes after embroidery on the surfaces is completely removed;
4) after being cleaned and dried by a blower, the film can be directly placed into a scanning electron microscope for fracture analysis.
2. The experimental method for eliminating the rust on the fracture surface of the steel rail according to claim 1, is characterized in that: the concentration of the hydrochloric acid is 5-20%.
3. The experimental method for eliminating the rust on the surface of the steel rail fracture as claimed in claim 1, is characterized in that: the concentration of the hydrochloric acid is 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210706628.8A CN115128112A (en) | 2022-06-21 | 2022-06-21 | Experimental method for eliminating corrosion on surface of fracture of steel rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210706628.8A CN115128112A (en) | 2022-06-21 | 2022-06-21 | Experimental method for eliminating corrosion on surface of fracture of steel rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115128112A true CN115128112A (en) | 2022-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210706628.8A Pending CN115128112A (en) | 2022-06-21 | 2022-06-21 | Experimental method for eliminating corrosion on surface of fracture of steel rail |
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| CN (1) | CN115128112A (en) |
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2022
- 2022-06-21 CN CN202210706628.8A patent/CN115128112A/en active Pending
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