CN114959713B - Corrosion inhibitor for inhibiting low-carbon steel metallographic phase sample pitting corrosion - Google Patents
Corrosion inhibitor for inhibiting low-carbon steel metallographic phase sample pitting corrosion Download PDFInfo
- Publication number
- CN114959713B CN114959713B CN202110213698.5A CN202110213698A CN114959713B CN 114959713 B CN114959713 B CN 114959713B CN 202110213698 A CN202110213698 A CN 202110213698A CN 114959713 B CN114959713 B CN 114959713B
- Authority
- CN
- China
- Prior art keywords
- sample
- corrosion inhibitor
- metallographic
- polishing
- corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The invention relates to a corrosion inhibitor for inhibiting corrosion of a low-carbon steel metallographic sample and a metallographic sample preparation method, which mainly solve the problem that part of low-carbon steel plates are easy to produce punctiform corrosion in the metallographic sample preparation process, and 500ml of the corrosion inhibitor comprises the following components: 10-15g of hexadecylamine, 10-15g of sulfonated lignin, 5-10 g of dodecyl trimethyl ammonium chloride, 5-10 g of cocoyl sodium glycinate, 200ml of alcohol and the balance of deionized water. The invention optimizes the original metallographic sample preparation method, in particular to the polishing process, meets the metallographic sample preparation requirement of the sample, has good stability of corrosive liquid, has good slow release effect, can also be used for polishing other easily corroded metal materials, and has wide application range.
Description
Technical Field
The invention relates to a corrosion inhibitor, in particular to a corrosion inhibitor for inhibiting pitting corrosion of a low-carbon steel metallographic sample, and belongs to the technical field of metallographic structure inspection of steel materials.
Background
In the process of metallographic sample preparation by using a conventional metallographic sample preparation method, it is found that some steel grades are easy to generate dense distribution small black point defects, the diameter of the black points is about 2-5 mu m, the black points are invisible to naked eyes, the steel grades are displayed as black small dots under a metallographic microscope, and the steel grades have no obvious effect after repeated experiments on site, such as increasing accurate grinding time, increasing polishing time, changing other polishing solutions, and the like. The presence of small black spots severely affects the subsequent observation of metallographic samples: the observation and the grade judgment of the inclusions are influenced, the observation and the structure judgment of a metallographic structure are influenced, and the method belongs to the defect that the metallographic structure is unacceptable in the metallographic sample preparation process. In order to find out the cause of the generation of the black point defect, a scanning electron microscope and energy spectrum analysis are carried out on a defect sample, a small amount of oxygen is found in a dot position through the energy spectrum analysis, the small black point is inferred to be in punctiform corrosion by combining morphology observation, a metallographic sample is contacted with water in the processes of sample preparation and polishing, the great part of the sample cannot be adversely affected, but punctiform corrosion is easy to occur on a small number of materials with water sensitivity in an aqueous environment, and in order to solve the problem, the invention designs a corrosion inhibitor for inhibiting the pitting corrosion of the metallographic sample of the steel plate, and the metallographic sample preparation method of the corrosion inhibitor is properly adjusted, so that the metallographic sample preparation requirement of the sample is met.
By examining the literature and patents, no articles and patents have been found to address this problem, and similar patents are as follows:
the invention discloses a composite polishing solution convenient to clean and corrosion-resistant and a preparation method thereof, and the method disclosed by the invention is characterized by comprising the following raw materials in parts by weight: 11-14 parts of cerium oxide, 5-7 parts of titanium dioxide, 5-7 parts of rust inhibitor T7473-4 parts of ethanol, 2-4 parts of phosphate, 5-7 parts of isopropanol, 4-7 parts of dioctyl sodium sulfosuccinate, 3-5 parts of sodium stearate, 2-4 parts of sodium alginate, 5-7 parts of auxiliary agent and 300 parts of deionized water; according to the invention, surfactants such as dioctyl sodium sulfosuccinate are added, a physical adsorption surface layer which is easy to clean for a long time is formed on the surface of a processed metal, so that the surface state is improved, an auxiliary agent is added, good wear resistance, dispersion, lubrication and film forming properties are achieved, and an antirust agent is added, so that an antirust layer can be formed on the surface of the metal; the mixed polishing solution is safe, nontoxic, simple in manufacturing process, high in speed, easy to clean and suitable for polishing stainless steel products. The polishing agent is used for polishing stainless steel samples, and is different from the component system and principle of the polishing agent.
The invention discloses a polishing solution for metallographic analysis, a preparation method and a use method thereof, and discloses a polishing solution for metallographic analysis, which takes alumina powder and mullite as polishing powder, sodium dodecyl sulfate, polyoxyethylene nonylphenol ether, triglycerin monostearate, triethanolamine, potassium pyrophosphate and potassium tripolyphosphate as additives, and absolute ethyl alcohol and water as dispersion media. The polishing solution for metallographic analysis is suitable for metallographic sample preparation and polishing of hard alloy, can effectively carry out fine polishing on the hard alloy, and has different component systems from the polishing solution.
The Chinese patent application with application publication number of CN104131293A discloses a polishing solution for polishing metal surfaces and a preparation method thereof, and in the method, the polishing solution for polishing the metal surfaces is disclosed and is characterized by being prepared from the following raw materials in parts by weight: 1-2 parts of diethanolamine, 2-3 parts of ethanolamine, 2-4 parts of lauroyl diethanolamine, 3-4 parts of hydroxypropyl cellulose, 3-5 parts of diethylene glycol monomethyl ether, 2-4 parts of polyoxypropylene polyoxyethylene propylene glycol ether, 10-15 parts of nano alumina, 1-2 parts of gelatin, 1-2 parts of methionine, 5-7 parts of auxiliary agent and 300 parts of deionized water; the polishing agent disclosed by the invention has the main effects of being used for polishing, and the methionine has a good corrosion inhibition effect, so that the polishing speed is stable, the environmental pollution can be reduced, and the polishing agent is suitable for polishing metal surfaces, and is particularly suitable for steel surfaces. In the method, methionine is added to play a role in corrosion inhibition, but the problems to be solved are completely different from the components of the corrosion inhibitor.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides the corrosion inhibitor for inhibiting the pitting corrosion of the low-carbon steel metallographic sample, and the technical scheme mainly solves the problem that part of water-sensitive steel plates are easy to produce punctiform corrosion in the metallographic sample preparation process, thereby meeting the metallographic sample preparation requirement and forming the metallographic polished surface of a mirror surface.
In order to achieve the above purpose, the technical scheme of the invention is as follows, a corrosion inhibitor for inhibiting the pitting corrosion of a low-carbon steel metallographic sample, wherein 500ml of the corrosion inhibitor is prepared from the following raw materials: 10-15g of hexadecylamine, 10-15g of sulfonated lignin, 5-10 g of dodecyl trimethyl ammonium chloride, 5-10 g of cocoyl sodium glycinate, 200ml of alcohol and the balance of deionized water.
A corrosion inhibitor for inhibiting corrosion of a metallographic sample of low-carbon steel, wherein 500ml of the corrosion inhibitor is prepared from the following raw materials: 15g of hexadecylamine, 15g of sulfonated lignin, 10g of dodecyl trimethyl ammonium chloride, 10g of sodium cocoyl glycinate, 200ml of alcohol and the balance of deionized water.
A corrosion inhibitor for inhibiting corrosion of a metallographic sample of low-carbon steel, wherein 500ml of the corrosion inhibitor is prepared from the following raw materials: 12g of hexadecylamine, 12g of sulfonated lignin, 8g of dodecyl trimethyl ammonium chloride, 8g of sodium cocoyl glycinate, 200ml of alcohol and the balance of deionized water.
The preparation method of the corrosion inhibitor for inhibiting the corrosion of the metallographic sample of the low-carbon steel comprises the following steps:
step (1): respectively weighing hexadecylamine, sulfonated lignin, dodecyl trimethyl ammonium chloride and sodium cocoyl glycinate according to the proportion;
step (2): adding hexadecylamine into 200ml of alcohol solution, and uniformly stirring;
step (3): heating 200ml of deionized water to 50-60 ℃, sequentially adding sulfonated lignin and dodecyl trimethyl ammonium chloride, uniformly stirring to completely dissolve the sulfonated lignin and dodecyl trimethyl ammonium chloride, cooling to room temperature, adding sodium cocoyl glycinate, and uniformly stirring;
step (4): step (2) and (3) are mixed, and deionized water is added to 500ml. The invention relates to a corrosion inhibitor for inhibiting low-carbon steel metallographic phase sample pitting, which is prepared according to the following steps:
the slow released hexadecylamine and sulfonated lignin are prepared through the reaction of palmitic acid and ammonia, dewatering and hydrogenating, and are surface active organic corrosion inhibitor with two kinds of polar groups capable of being adsorbed onto clean metal surface to form one molecular film, which may be formed into film in anode or cathode to prevent the diffusion of dissolved oxygen in water and water to metal surface. Sulfonated lignin: the polymer has good diffusivity, is easy to dissolve in water, has phenolic hydroxyl as a functional group, can be adsorbed by surface charges of metal, and forms a monolayer in the whole anode and cathode areas, thereby preventing or slowing down corresponding electrochemical reaction.
Hexadecylamine and sulfonated lignin belong to adsorption film type organic corrosion inhibitors, and molecules of the compounds are adsorbed on the metal surface through hydrophilic groups to form a compact hydrophobic film, so that the metal surface is protected from being corroded by water. However, if there are corrosion products or scale deposits on the metal surface, it is difficult to form a corrosion inhibiting film with good effect, and a small amount of surfactant may be added to assist the formation of such corrosion inhibitor. Dodecyl trimethyl ammonium chloride is a cationic surfactant of quaternary ammonium salt type, is prepared by reacting tertiary ammonium with an alkylating agent, is in the form of an organic group substituted by 4 hydrogen atoms of ammonium ions, is called as R1R2N+R3R4, has strong alkalinity, better compatibility with other surfactants, has a series of excellent properties, is easily dissolved in water, is transparent and has good surface activity. The cocoyl sodium glycinate is an amino acid surfactant, can obtain smooth and elastic foam, can be used as a cleaning agent, can reduce friction force during polishing, can increase lubricity, plays a role of the cleaning agent, and can improve polishing quality.
The metallographic sample preparation method for inhibiting the pitting corrosion of the low-carbon steel metallographic sample is characterized by comprising the following steps of:
cutting a sample, and sampling at a specified part of the steel plate according to a standard, a technical protocol or user requirements;
embedding the sample in the step (2), and embedding the intercepted steel plate sample by using an embedding machine to obtain an embedded sample;
grinding the sample, namely grinding the embedded sample into a metallographic sample according to the sequence of abrasive paper from the thick abrasive paper to the thin abrasive paper according to the sequence of the abrasive paper of the number 180, the number 240, the number 320, the number 400, the number 600, the number 800 and the number 1000, and cleaning the surface of the sample by using clean water after each abrasive paper;
step (4) mechanically polishing the sample, polishing the polished sample on a polishing disk, wherein two materials, namely diamond grinding paste with the diameter of 2.5 mu m and slow release agent prepared according to any one of claims 1-4, are used in the polishing process, a small amount of deionized water can be added according to requirements to keep the polishing cloth moist, the diamond grinding paste with the diameter of 2.5 mu m is uniformly smeared on the polishing cloth during polishing, then a corrosion inhibitor is sprayed on the polishing cloth, and in the polishing process, the corrosion inhibitor is continuously added, and a small amount of deionized water is added according to requirements to keep the polishing cloth moist, and meanwhile, the sample is cooled;
and (5) cleaning the sample, and drying the polished sample after cleaning with alcohol for later use.
Compared with the prior art, the invention has the following advantages that the technical effects of the technical scheme are mainly embodied in the following aspects: 1) The technical scheme solves the problem that part of water-sensitive steel plates are easy to produce punctiform corrosion in the metallographic sample preparation process, meets the metallographic sample preparation requirement, and provides basic guarantee for subsequent inclusion observation and metallographic structure identification. In the process of carrying out metallographic sample preparation by using a conventional metallographic sample preparation method, the defect that certain steel grades are easy to generate small black spots which are not visible to naked eyes but densely distributed under a microscope is found, and the obvious effect is not achieved after repeated experiments on site. In order to solve the problem, a corrosion inhibitor for inhibiting the pitting of a steel plate metallographic sample is designed by referring to a large amount of data and repeated experiments, the main components of the corrosion inhibitor are hexadecylamine and sulfonated lignin, the molecules of the compounds are adsorbed on the surface of metal by hydrophilic groups to form a layer of compact hydrophobic film, the surface of the metal is protected from being corroded by water, and in addition, dodecyl trimethyl ammonium chloride, sodium cocoyl glycinate and alcohol are added to play the roles of a surfactant, lubricity and a cleaning agent. The metallographic sample preparation method is also adjusted by combining with the use of the slow release agent, so that the metallographic sample preparation requirement of the sample is met. The corrosion inhibitor is used for metallographic sample preparation of steel grades which are easy to be subjected to punctiform corrosion, such as IF steel, BTC330, BS700 and the like, rust points of the steel grades are basically eliminated, and the corrosion inhibitor can play a role in eliminating punctiform corrosion; 2) The technical scheme fully utilizes the existing sample preparation equipment, has small change to the sample preparation flow, is simple and convenient in method, and has good sample preparation effect reproducibility. The invention does not add new sample preparation equipment, adjusts the sample preparation flow, mainly reflects in the mechanical polishing stage, adds the slow release agent for preventing punctiform corrosion, does not use tap water which is commonly used in the polishing process, but uses deionized water, and the test result shows that the method is effective; 3) The corrosive liquid in the technical scheme has good stability and good slow-release effect, can also be used for polishing other easily corroded metal materials, and has wide application range.
Drawings
FIG. 1 is a photograph of polished state of a conventional metallographic sample of IF steel,
FIG. 2 is a photograph of the polished state after the slow release agent and metallographic sample preparation method of the patent are adopted.
FIG. 3 is a photograph of a polished state of a conventional metallographic sample of enamelled steel BTC330,
FIG. 4 is a photograph of the polished state after the slow release agent and metallographic sample preparation method of the present patent are adopted.
Figure 5 is a photograph of a polished state of a conventional metallographic sample of BS700,
FIG. 6 is a photograph of the polished state after the slow release agent and metallographic sample preparation method of the present patent are adopted.
The specific embodiment is as follows:
in order to enhance the understanding of the present invention, the present embodiment will be described in detail with reference to the accompanying drawings.
Example 1: the sample is IF steel, and the chemical components (weight percentage) are: c:0.002%, si:0.025%, mn:0.15 percent, P is less than or equal to 0.006 percent, S is less than or equal to 0.007 percent, alt:0.35%, ti:0.04%.
A corrosion inhibitor for inhibiting the pitting corrosion of a low-carbon steel metallographic sample is prepared from the following raw materials in 500 ml: 15g of hexadecylamine, 15g of sulfonated lignin, 10g of dodecyl trimethyl ammonium chloride, 10g of sodium cocoyl glycinate, 200ml of alcohol and the balance of deionized water.
The preparation method of the corrosion inhibitor for inhibiting the corrosion of the metallographic sample of the low-carbon steel comprises the following steps:
(1) Respectively weighing hexadecylamine, sulfonated lignin, dodecyl trimethyl ammonium chloride and sodium cocoyl glycinate according to the proportion;
(2) Adding hexadecylamine into 200ml of alcohol solution, and uniformly stirring;
(3) Heating 200ml of deionized water to 50-60 ℃, sequentially adding sulfonated lignin and dodecyl trimethyl ammonium chloride, uniformly stirring to completely dissolve the sulfonated lignin and dodecyl trimethyl ammonium chloride, cooling to room temperature, adding sodium cocoyl glycinate, and uniformly stirring;
(4) Mixing the solutions obtained in (2) and (3), adding sodium cocoyl glycinate, and adding deionized water to 500ml. A metallographic sample preparation method for inhibiting pitting corrosion of a low-carbon steel metallographic sample comprises the following steps:
(1) The sample was cut out and sampled at 1/4 of the width of the steel plate according to the standard, and the observation surface was the longitudinal direction of the steel plate.
(2) Embedding the sample, namely embedding the intercepted steel plate sample by using an embedding machine to obtain an embedded sample;
(3) Grinding the sample, namely grinding the embedded sample into a metallographic sample according to the sequence of abrasive paper from the number 180, the number 240, the number 320, the number 400, the number 600, the number 800 and the number 1000, and cleaning the surface of the sample by using clean water after each abrasive paper;
(4) Mechanically polishing the sample, polishing the polished sample on a polishing disk, wherein during the polishing process, two materials of 2.5 mu m diamond grinding paste and the slow release agent prepared by the method can be used, and a small amount of deionized water can be added if necessary. During polishing, the 2.5 mu m diamond grinding paste is uniformly smeared on the polishing cloth, then the corrosion inhibitor is sprayed on the polishing cloth, in the polishing process, the corrosion inhibitor is continuously added, a small amount of deionized water is added when necessary to keep the polishing cloth moist, and meanwhile, the sample is cooled.
(5) And cleaning the sample, cleaning the polished sample with alcohol, and drying for later use.
The polished metallographic photograph of the sample obtained by adopting a conventional metallographic sample preparation method is shown in figure 1, the surface of the sample is fully distributed with point rust, the sample preparation requirement is not met, the polished metallographic photograph of the sample obtained by adopting the slow release agent and the metallographic sample preparation method is shown in figure 2, and the point rust is removed.
In example 2, the sample is enamel steel BTC330, and the chemical components (weight percentage) are: c is less than or equal to 0.16 percent, si is less than or equal to 0.16 percent, mn: less than or equal to 0.09%, P less than or equal to 0.035%, S less than or equal to 0.035%, alt less than or equal to 0.010%
A corrosion inhibitor for inhibiting the pitting corrosion of a low-carbon steel metallographic sample is prepared from the following raw materials in 500 ml: 12g of hexadecylamine, 12g of sulfonated lignin, 8g of dodecyl trimethyl ammonium chloride, 8g of sodium cocoyl glycinate, 200ml of alcohol and the balance of deionized water.
The preparation method of the corrosion inhibitor for inhibiting the corrosion of the metallographic sample of the low-carbon steel comprises the following steps:
(1) Respectively weighing hexadecylamine, sulfonated lignin, dodecyl trimethyl ammonium chloride and sodium cocoyl glycinate according to the proportion;
(2) Adding hexadecylamine into 200ml of alcohol solution, and uniformly stirring;
(3) Heating 200ml of deionized water to 50-60 ℃, sequentially adding sulfonated lignin and dodecyl trimethyl ammonium chloride, uniformly stirring to completely dissolve the sulfonated lignin and dodecyl trimethyl ammonium chloride, cooling to room temperature, adding sodium cocoyl glycinate, and uniformly stirring;
(4) Mixing the solutions obtained in (2) and (3), adding sodium cocoyl glycinate, and adding deionized water to 500ml. A metallographic sample preparation method for inhibiting pitting corrosion of a low-carbon steel metallographic sample comprises the following steps:
(1) The sample was cut out and sampled at 1/4 of the width of the steel plate according to the standard, and the observation surface was the longitudinal direction of the steel plate.
(2) Embedding the sample, namely embedding the intercepted steel plate sample by using an embedding machine to obtain an embedded sample;
(3) Grinding the sample, namely grinding the embedded sample into a metallographic sample according to the sequence of abrasive paper from the number 180, the number 240, the number 320, the number 400, the number 600, the number 800 and the number 1000, and cleaning the surface of the sample by using clean water after each abrasive paper;
(4) Mechanically polishing the sample, polishing the polished sample on a polishing disk, wherein during the polishing process, two materials of 2.5 mu m diamond grinding paste and the slow release agent prepared by the method can be used, and a small amount of deionized water can be added if necessary. During polishing, the 2.5 mu m diamond grinding paste is uniformly smeared on the polishing cloth, then the corrosion inhibitor is sprayed on the polishing cloth, in the polishing process, the corrosion inhibitor is continuously added, a small amount of deionized water is added when necessary to keep the polishing cloth moist, and meanwhile, the sample is cooled.
(5) And cleaning the sample, cleaning the polished sample with alcohol, and drying for later use.
Example 3, sample BS700, has the chemical composition (weight percent): c:0.07%, si:0.15%, mn:1.80 percent, P is less than or equal to 0.005 percent, S is less than or equal to 0.003 percent, cr:0.5%, nb:0.06%, ti:0.09%, mo:0.12%, alt:0.30%
A corrosion inhibitor for inhibiting the pitting corrosion of a low-carbon steel metallographic sample is prepared from the following raw materials in 500 ml: 10g of hexadecylamine, 10g of sulfonated lignin, 5g of dodecyl trimethyl ammonium chloride, 5g of sodium cocoyl glycinate, 200ml of alcohol and the balance of deionized water.
The preparation method of the corrosion inhibitor for inhibiting the corrosion of the metallographic sample of the low-carbon steel comprises the following steps:
(1) Respectively weighing hexadecylamine, sulfonated lignin, dodecyl trimethyl ammonium chloride and sodium cocoyl glycinate according to the proportion;
(2) Adding hexadecylamine into 200ml of alcohol solution, and uniformly stirring;
(3) Heating 200ml of deionized water to 50-60 ℃, sequentially adding sulfonated lignin and dodecyl trimethyl ammonium chloride, uniformly stirring to completely dissolve the sulfonated lignin and dodecyl trimethyl ammonium chloride, cooling to room temperature, adding sodium cocoyl glycinate, and uniformly stirring;
(4) Mixing the solutions obtained in (2) and (3), adding sodium cocoyl glycinate, and adding deionized water to 500ml. A metallographic sample preparation method for inhibiting pitting corrosion of a low-carbon steel metallographic sample comprises the following steps:
(1) The sample was cut out and sampled at 1/4 of the width of the steel plate according to the standard, and the observation surface was the longitudinal direction of the steel plate.
(2) Embedding the sample, namely embedding the intercepted steel plate sample by using an embedding machine to obtain an embedded sample;
(3) Grinding the sample, namely grinding the embedded sample into a metallographic sample according to the sequence of abrasive paper from the number 180, the number 240, the number 320, the number 400, the number 600, the number 800 and the number 1000, and cleaning the surface of the sample by using clean water after each abrasive paper;
(4) Mechanically polishing the sample, polishing the polished sample on a polishing disk, wherein during the polishing process, two materials of 2.5 mu m diamond grinding paste and the slow release agent prepared by the method can be used, and a small amount of deionized water can be added if necessary. During polishing, the 2.5 mu m diamond grinding paste is uniformly smeared on the polishing cloth, then the corrosion inhibitor is sprayed on the polishing cloth, in the polishing process, the corrosion inhibitor is continuously added, a small amount of deionized water is added when necessary to keep the polishing cloth moist, and meanwhile, the sample is cooled.
(5) And cleaning the sample, cleaning the polished sample with alcohol, and drying for later use.
The polished metallographic photograph of the sample obtained by adopting a conventional metallographic sample preparation method is shown in fig. 5, the surface of the sample is fully distributed with point rust, the sample preparation requirement is not met, the polished metallographic photograph of the sample obtained by adopting the slow release agent and the metallographic sample preparation method is shown in fig. 6, and the point rust is removed. It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and equivalent changes or substitutions made on the basis of the above-mentioned technical solutions fall within the scope of the present invention as defined in the claims.
Claims (5)
1. The corrosion inhibitor for inhibiting the pitting corrosion of the low-carbon steel metallographic phase sample is characterized in that 500ml of the corrosion inhibitor is prepared from the following raw materials: 10-15g of hexadecylamine, 10-15g of sulfonated lignin, 5-10 g of dodecyl trimethyl ammonium chloride, 5-10 g of cocoyl sodium glycinate, 200ml of alcohol and the balance of deionized water.
2. The corrosion inhibitor for inhibiting metallographic pitting corrosion of low carbon steel according to claim 1, wherein said 500ml of corrosion inhibitor is prepared from the following raw materials: 15g of hexadecylamine, 15g of sulfonated lignin, 10g of dodecyl trimethyl ammonium chloride, 10g of sodium cocoyl glycinate, 200ml of alcohol and the balance of deionized water.
3. The corrosion inhibitor for inhibiting metallographic pitting corrosion of low carbon steel according to claim 1, wherein said 500ml of corrosion inhibitor is prepared from the following raw materials: 12g of hexadecylamine, 12g of sulfonated lignin, 8g of dodecyl trimethyl ammonium chloride, 8g of sodium cocoyl glycinate, 200ml of alcohol and the balance of deionized water.
4. A corrosion inhibitor for inhibiting metallographic pitting corrosion of low carbon steel according to claim 1, 2 or 3, wherein the preparation method comprises the following steps:
step (1): respectively weighing hexadecylamine, sulfonated lignin, dodecyl trimethyl ammonium chloride and sodium cocoyl glycinate according to the proportion;
step (2): adding hexadecylamine into 200ml of alcohol solution, and uniformly stirring;
step (3): heating 200ml of deionized water to 50-60 ℃, sequentially adding sulfonated lignin and dodecyl trimethyl ammonium chloride, uniformly stirring to completely dissolve the sulfonated lignin and dodecyl trimethyl ammonium chloride, cooling to room temperature, adding sodium cocoyl glycinate, and uniformly stirring;
step (4): step (2) and (3) are mixed, and deionized water is added to 500ml.
5. A metallographic sample preparation method for inhibiting pitting corrosion of a low carbon steel metallographic sample by adopting the corrosion inhibitor according to any one of claims 1 to 4, which is characterized by comprising the following steps:
cutting a sample, and sampling at a specified part of the steel plate according to a standard, a technical protocol or user requirements;
embedding the sample in the step (2), and embedding the intercepted steel plate sample by using an embedding machine to obtain an embedded sample;
grinding the sample, namely grinding the embedded sample into a metallographic sample according to the sequence of abrasive paper from the thick abrasive paper to the thin abrasive paper according to the sequence of the abrasive paper of the number 180, the number 240, the number 320, the number 400, the number 600, the number 800 and the number 1000, and cleaning the surface of the sample by using clean water after each abrasive paper;
step (4) mechanically polishing the sample, polishing the polished sample on a polishing disk, wherein during polishing, 2.5 mu m of diamond grinding paste and a slow release agent prepared according to any one of claims 1-4 are used, a small amount of deionized water is added according to requirements, during polishing, the 2.5 mu m of diamond grinding paste is uniformly smeared on polishing cloth, then a corrosion inhibitor is sprayed on the polishing cloth, during polishing, the corrosion inhibitor is continuously added, and a small amount of deionized water is added according to requirements to keep the polishing cloth moist, and meanwhile, the sample is cooled;
and (5) cleaning the sample, and drying the polished sample after cleaning with alcohol for later use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110213698.5A CN114959713B (en) | 2021-02-26 | 2021-02-26 | Corrosion inhibitor for inhibiting low-carbon steel metallographic phase sample pitting corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110213698.5A CN114959713B (en) | 2021-02-26 | 2021-02-26 | Corrosion inhibitor for inhibiting low-carbon steel metallographic phase sample pitting corrosion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114959713A CN114959713A (en) | 2022-08-30 |
| CN114959713B true CN114959713B (en) | 2023-10-10 |
Family
ID=82972676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110213698.5A Active CN114959713B (en) | 2021-02-26 | 2021-02-26 | Corrosion inhibitor for inhibiting low-carbon steel metallographic phase sample pitting corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114959713B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131286A (en) * | 2014-07-01 | 2014-11-05 | 安徽宏发节能设备有限公司 | Stable-quality high-polishing-efficiency metal polishing fluid and preparation method thereof |
| CN106813966A (en) * | 2015-12-01 | 2017-06-09 | 上海梅山钢铁股份有限公司 | A kind of EBSD analysis preparation method of low-carbon (LC) steel sample |
| CN107880784A (en) * | 2017-12-04 | 2018-04-06 | 苏州市宽道模具机械有限公司 | A kind of high-performance polishing fluid and preparation method thereof |
| CN109023381A (en) * | 2018-10-25 | 2018-12-18 | 中国石油大学(华东) | Neutralize corrosion inhibiter and its preparation method and application |
| CN109759908A (en) * | 2019-02-20 | 2019-05-17 | 天津跃峰科技股份有限公司 | Polishing method is used in a kind of production and processing of precision die |
| CN111982904A (en) * | 2020-08-25 | 2020-11-24 | 国电科学技术研究院有限公司 | Metallographic structure display method of titanium-carbon steel composite plate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5940270B2 (en) * | 2010-12-09 | 2016-06-29 | 花王株式会社 | Polishing liquid composition |
| JP6659449B2 (en) * | 2016-05-09 | 2020-03-04 | 山口精研工業株式会社 | Abrasive composition for electroless nickel-phosphorus plated aluminum magnetic disk substrate |
-
2021
- 2021-02-26 CN CN202110213698.5A patent/CN114959713B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131286A (en) * | 2014-07-01 | 2014-11-05 | 安徽宏发节能设备有限公司 | Stable-quality high-polishing-efficiency metal polishing fluid and preparation method thereof |
| CN106813966A (en) * | 2015-12-01 | 2017-06-09 | 上海梅山钢铁股份有限公司 | A kind of EBSD analysis preparation method of low-carbon (LC) steel sample |
| CN107880784A (en) * | 2017-12-04 | 2018-04-06 | 苏州市宽道模具机械有限公司 | A kind of high-performance polishing fluid and preparation method thereof |
| CN109023381A (en) * | 2018-10-25 | 2018-12-18 | 中国石油大学(华东) | Neutralize corrosion inhibiter and its preparation method and application |
| CN109759908A (en) * | 2019-02-20 | 2019-05-17 | 天津跃峰科技股份有限公司 | Polishing method is used in a kind of production and processing of precision die |
| CN111982904A (en) * | 2020-08-25 | 2020-11-24 | 国电科学技术研究院有限公司 | Metallographic structure display method of titanium-carbon steel composite plate |
Non-Patent Citations (1)
| Title |
|---|
| 浅谈不锈钢化学抛光添加剂的选择;屈战民;材料保护(第04期);第80页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114959713A (en) | 2022-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109989090A (en) | A method of corrosion stability of magnesium alloy film layer is prepared using superslide surface | |
| CN108085693A (en) | Rust cleaning antirusting agent | |
| CN107789665A (en) | A kind of preparation method of the super-hydrophobic hydroxyapatite film layer of Mg alloy surface | |
| ES2496569T3 (en) | Conditioning of metal surfaces before phosphating | |
| CN101705492A (en) | Steel hydrochloric acid pickling corrosion inhibitor | |
| Yin et al. | A facile approach to fabricate robust superhydrophobic Cu/TiO2 composite coating on stainless steel | |
| CN111982645B (en) | Metallographic corrosion method for simultaneously displaying austenitic stainless steel and aluminide coating tissue structure on surface of austenitic stainless steel | |
| CN104264173A (en) | Environment-friendly neutral oil-removing rust-removing passivator and preparation method thereof | |
| CN103882421B (en) | Amorphous alloy coating prepared by using plasma spraying technology and preparation method thereof | |
| Liu et al. | 5-Methyl-1H-benzotriazole as an effective corrosion inhibitor for ultra-precision chemical mechanical polishing of bearing steel | |
| CN114959713B (en) | Corrosion inhibitor for inhibiting low-carbon steel metallographic phase sample pitting corrosion | |
| CN110564266B (en) | Anticorrosive composite coating material with self-repairing function and coating preparation method | |
| Zhu et al. | CoNiWReP high entropy alloy coatings prepared by pulse current electrodeposition from aqueous solution | |
| CN110359048A (en) | A kind of titanium-carbon steel composite board etchant and application method | |
| CN107587126A (en) | A kind of nano ceramics silane complex film layer transforming agent containing graphene oxide | |
| CN109179497B (en) | Preparation method of spherical titanium dioxide and application of spherical titanium dioxide in self-cleaning coating | |
| CN113279035A (en) | Novel sealing agent for aluminum and aluminum alloy anodic oxide film and preparation method thereof | |
| CN115323383B (en) | Preparation method of ionic liquid corrosion inhibitor modified hydrotalcite composite coating and application of ionic liquid corrosion inhibitor modified hydrotalcite composite coating in magnesium alloy corrosion prevention | |
| CN108486573A (en) | A kind of environment-friendly type stainless steel chemical polishing solution and its preparation and polishing method | |
| CN107475705A (en) | A kind of ordinary steel application substrate passivator and preparation method thereof | |
| CN108754517A (en) | A kind of rust remover and preparation method thereof for mechanical equipment | |
| WO2012157758A1 (en) | Liquid for forming microstructure film on metal surface | |
| CN110756996B (en) | Wire drawing process for automobile label | |
| CN102242367B (en) | Multifunctional novel ethylene diamine tetraacetic acid (EDTA) cleaning corrosion inhibitor | |
| CN109652790B (en) | Environment-friendly chemical conversion treatment method for aluminum alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |