CN112609184A - Composite quantum dot carbon steel corrosion inhibitor, preparation method and application - Google Patents
Composite quantum dot carbon steel corrosion inhibitor, preparation method and application Download PDFInfo
- Publication number
- CN112609184A CN112609184A CN202011321472.9A CN202011321472A CN112609184A CN 112609184 A CN112609184 A CN 112609184A CN 202011321472 A CN202011321472 A CN 202011321472A CN 112609184 A CN112609184 A CN 112609184A
- Authority
- CN
- China
- Prior art keywords
- carbon steel
- quantum dot
- corrosion inhibitor
- composite quantum
- 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.)
- Granted
Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 112
- 230000007797 corrosion Effects 0.000 title claims abstract description 110
- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 65
- 239000010962 carbon steel Substances 0.000 title claims abstract description 65
- 239000002096 quantum dot Substances 0.000 title claims abstract description 59
- 239000003112 inhibitor Substances 0.000 title claims abstract description 58
- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims abstract description 32
- 239000004312 hexamethylene tetramine Substances 0.000 claims abstract description 32
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims abstract description 28
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 8
- 230000002378 acidificating effect Effects 0.000 claims abstract description 7
- 238000004321 preservation Methods 0.000 claims abstract description 6
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 239000000706 filtrate Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 238000004108 freeze drying Methods 0.000 claims description 4
- 238000005119 centrifugation Methods 0.000 claims description 3
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 230000005764 inhibitory process Effects 0.000 abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 231100000053 low toxicity Toxicity 0.000 abstract description 4
- 229960004011 methenamine Drugs 0.000 description 26
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 7
- 125000003368 amide group Chemical group 0.000 description 7
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 5
- -1 Carboxyl group Chemical group 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 125000000524 functional group Chemical group 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000007112 amidation reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000002189 fluorescence spectrum Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000002608 ionic liquid Substances 0.000 description 2
- 238000005424 photoluminescence Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 150000003852 triazoles Chemical class 0.000 description 2
- 238000001157 Fourier transform infrared spectrum Methods 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000002262 Schiff base Substances 0.000 description 1
- 150000004753 Schiff bases Chemical class 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010504 bond cleavage reaction Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 238000000608 laser ablation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000004347 surface barrier Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Images
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
- C23F11/04—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/65—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing carbon
Abstract
The invention provides a composite quantum dot carbon steel corrosion inhibitor, a preparation method and application thereof, wherein the composite quantum dot carbon steel corrosion inhibitor is hexamethylenetetramine-itaconic acid composite quantum dot CD1‑CD2. The composite quantum dot carbon steel corrosion inhibitor is prepared by taking hexamethylenetetramine and itaconic acid as raw materials and carrying out heat preservation reaction at 150 ℃ by adopting a hydrothermal method. The composite quantum dot carbon steel corrosion inhibitor is used for inhibiting corrosion of carbon steel under acidic conditions. The composite quantum dot is a carbon composite quantum dot CD1‑CD2，CD1‑CD2High water solubility, good biocompatibility, low toxicity and good corrosion inhibition, and belongs to a mixed corrosion inhibitor which mainly inhibits cathode corrosion. CD of the present invention1‑CD2CD with better corrosion inhibition effect than single CD1And CD2The corrosion inhibitor is used for corrosion of carbon steel under acidic conditions.
Description
Technical Field
The invention belongs to the field of metal material corrosion, relates to a corrosion inhibitor, and particularly relates to a composite quantum dot carbon steel corrosion inhibitor, a preparation method and application thereof.
Background
Corrosion is an inevitable natural phenomenon, and its effects are reflected in three most interesting areas, namely the field of economics, the field of safety and the field of environment. Corrosion can degrade large equipment in many industries, resulting in significant economic losses. The simplest and most cost effective way to solve the metal corrosion problem is to add a corrosion inhibitor to the corrosive solution. The corrosion inhibitor forms a compact adsorption film with the metal surface through physical adsorption, namely electrostatic interaction or chemical adsorption, namely coordination covalent bond, or forms a surface barrier for preventing aggressive substances from diffusing to the metal surface through the action, thereby achieving the purpose of protecting the metal. Therefore, a corrosion inhibitor having a stronger adsorption capacity means a higher corrosion inhibition capacity.
At present, organic compounds: for example, triazole, imidazole, ionic liquid and schiff base have been used for metal corrosion prevention, but these corrosion inhibitors such as triazole and imidazole have toxicity, ionic liquid has the disadvantage of high cost, and the like, so that the application thereof is limited to a certain extent. Along with the enhancement of environmental protection consciousness of people, the development of novel corrosion inhibitors which are environment-friendly, good in water solubility and high in efficiency is urgent.
Carbon quantum dots (Carbon dots), CD for short, are a novel Carbon-based zero-dimensional material, and an important Carbon-based Fluorescent (FL) nanomaterial has received increasing attention because of its high water solubility, good biocompatibility, low toxicity, unique Photoluminescence (PL) characteristics, less environmental pollution, wide raw material sources, low cost, and good biocompatibility in the natural environment. It has proven to have many potential applications such as sensing, biomedical, catalytic, and optoelectronic devices. At present, some researchers have shown that CD has good corrosion inhibition effect, and single CD and doped CD are developed and applied as corrosion inhibitor, such as carbon dots and nitrogen-doped carbon dot N-CD prepared by Cui and the like, and are applied to iron corrosion in HCl solution as corrosion inhibitor, and it is found that N heteroatom of nitrogen-doped carbon dot can be better adsorbed on iron surface and can show better corrosion inhibition performance than undoped carbon dot.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a composite quantum dot carbon steel corrosion inhibitor, a preparation method and application thereof, and solves the technical problems of high toxicity and high cost of the existing corrosion inhibitor in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the composite quantum dot carbon steel corrosion inhibitor is hexamethylenetetramine-itaconic acid composite quantum dot CD1-CD2。
The invention also has the following technical characteristics:
the composite quantum dot carbon steel corrosion inhibitor is prepared by taking hexamethylenetetramine and itaconic acid as raw materials and carrying out heat preservation reaction at 150 ℃ by adopting a hydrothermal method.
The invention also provides a preparation method of the composite quantum dot carbon steel corrosion inhibitor, which takes hexamethylenetetramine and itaconic acid as raw materials and adopts a hydrothermal method to carry out heat preservation reaction at 150 ℃ to prepare the composite quantum dot carbon steel corrosion inhibitor.
The method is specifically carried out according to the following steps:
dissolving hexamethylenetetramine in water, and magnetically stirring to uniformly mix the solution;
adding itaconic acid into a hexamethylenetetramine solution;
transferring the solution into a high-pressure reaction kettle, heating the solution to 150 ℃ in an oven, and keeping the temperature for 12 hours;
taking the reaction kettle out of the oven after heating is finished, naturally cooling to room temperature, putting the solution into a high-speed centrifuge for centrifugation, and separating out the sediment at the bottom;
step five, filtering the supernatant through a needle filter to obtain a filtrate, namely the prepared hexamethylene tetramine-itaconic acid composite quantum dot CD1-CD2And then freeze-drying the filtrate for later use.
Preferably, the molar ratio of hexamethylenetetramine to itaconic acid is 1: 3.
The invention also protects the application of the composite quantum dot carbon steel corrosion inhibitor in corrosion inhibition of carbon steel under acidic conditions.
When the addition amount of the composite quantum dot carbon steel corrosion inhibitor is 200mg/L, the Q235 carbon steel is in 1mol/L HCl environment.
Compared with the prior art, the invention has the following technical effects:
the composite quantum dot is carbon composite quantum dot CD1-CD2，CD1-CD2High water solubility, good biocompatibility, low toxicity and good corrosion inhibition, and belongs to a mixed corrosion inhibitor which mainly inhibits cathode corrosion.
(II) the CD of the present invention1-CD2CD with better corrosion inhibition effect than single CD1And CD2The method is used for corrosion of carbon steel under 1mol/L HCl acidic conditions.
(III) the CD of the present invention1-CD2When the molar ratio of hexamethylene tetramine to itaconic acid is 1:3, the corrosion inhibition rate reaches the maximum by comparing and observing an EIS diagram of Q235 carbon steel in 1mol/L HCl.
(IV) the CD of the present invention1-CD2When the adding concentration reaches 200mg/L, soaking Q235 carbon steel in 1mol/L HCl environment, measuring an impedance diagram after the open circuit voltage is stabilized, and calculating the corrosion inhibition rate, wherein the corrosion inhibition rate reaches 90.8%, and the corrosion inhibition effect on the corrosion of hydrochloric acid is obvious.
Drawings
FIG. 1(a) is a CD1，CD2And CD1-CD2The infrared spectrogram of the corrosion inhibitor.
FIG. 1(b) is a CD1，CD2And CD1-CD2Fluorescence spectrum of (2).
FIG. 2(a) is a polarization curve of corrosion inhibitor in Q235 carbon steel in HCl environment at 303K.
FIG. 2(b) is an EIS plot of corrosion inhibitors at 303K in Q235 carbon steel in HCl environment.
FIG. 3 is a chart of CD produced by different monomer molar ratios1-CD2EIS diagram of (a).
FIG. 4(a) is a polarization curve of Q235 steel in HCl solution.
FIG. 4(b) is an EIS diagram of Q235 steel in HCl solution.
The present invention will be explained in further detail with reference to examples.
Detailed Description
CD is a novel carbon-based zero-dimensional material, and has the advantages of excellent optical property, good water solubility, low toxicity, no pollution to the environment, wide raw material source, low cost and good biocompatibility in natural environment. There are various CD synthesizing methods, and the mature methods include laser ablation, arc discharge, hydrothermal method, microwave dispersion and electrochemical method. The invention takes hexamethylenetetramine and itaconic acid as raw materials, adopts a hydrothermal method to design and synthesize CD at the temperature of 150 DEG C1-CD2And the corrosion stability of the corrosion inhibitor is detected, and the excellent corrosion inhibition performance of the corrosion inhibitor on carbon steel in an acidic environment is explored.
The apparatus and materials used in the present invention:
hexamethylenetetramine (Xian chemical reagent factory; purity: analytical purity)
Itaconic acid (Jiuding chemical (Shanghai) science and technology Co., Ltd.; purity: analytical purity)
Fluorescence spectrophotometer (Shanghai Ling light technology Co., Ltd.; model: F97PRO)
Reaction kettle (Shanghai Yike instrument and equipment Co., Ltd.; type: KH-50)
Infrared spectrometer (Japan Shimadzu corporation; model: FTIIR-8400S)
Magnetic heating stirrer (Changzhou Guohua electric appliance Co., Ltd.; model: HJ-4A)
X-ray diffractometer (Germany Bruker company; model: D8 Advance)
Electrochemical workstation (Shanghai Chenghua instruments Co., Ltd.; model: CHI660B)
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
Comparative example 1:
the comparative example provides a quantum dot carbon steel corrosion inhibitor which is hexamethylenetetramine quantum dot CD1。
Hexamethylene tetramine quantum dot CD1The preparation of (1): the method comprises the steps of dissolving 0.6g (0.004mol) of hexamethylenetetramine in 30ml of water, magnetically stirring, stirring for 10min to uniformly mix the solution, transferring the solution to a high-pressure reaction kettle, heating to 150 ℃ in an oven, and keeping for 12 h. After heating, taking out the reaction kettle from the oven, naturally cooling to room temperature, centrifuging the solution in a high-speed centrifuge to separate out the bottom precipitate, filtering the supernatant with a 0.22 μm needle filter to obtain the final filtrate, i.e. the prepared CD1。
Comparative example 2:
the comparative example provides a quantum dot carbon steel corrosion inhibitor which is itaconic acid quantum dot CD2。
Itaconic acid quantum dot CD2The preparation of (1): the method comprises the steps of dissolving 0.6g (0.0046mol) of itaconic acid in 30ml of water, magnetically stirring, stirring for 10min to uniformly mix the solution, transferring the solution to a high-pressure reaction kettle, heating to 150 ℃ in an oven, and keeping for 12 h. After heating, taking out the reaction kettle from the oven, naturally cooling to room temperature, centrifuging the solution in a high-speed centrifuge to separate out the bottom precipitate, filtering the supernatant with a 0.22 μm needle filter to obtain the final filtrate, i.e. the prepared CD2And then freeze-drying the solution for later use.
Example 1:
this example provides a composite quantum dot carbon steel corrosion inhibitor, which is hexamethylenetetramine-itaconic acid composite quantum dot CD1-CD2。
According to the preparation method of the composite quantum dot carbon steel corrosion inhibitor, hexamethylenetetramine and itaconic acid are used as raw materials, a hydrothermal method is adopted, and the composite quantum dot carbon steel corrosion inhibitor is prepared through heat preservation reaction at 150 ℃.
The method is specifically carried out according to the following steps:
step one, dissolving 0.6g (0.004mol) of hexamethylenetetramine in 30mL of water, magnetically stirring, and stirring for 10min to uniformly mix the solution;
adding itaconic acid into a hexamethylenetetramine solution; in the preferred embodiment, the mole ratio of hexamethylenetetramine to itaconic acid is 1: 3.
Transferring the solution into a high-pressure reaction kettle, heating the solution to 150 ℃ in an oven, and keeping the temperature for 12 hours;
taking the reaction kettle out of the oven after heating is finished, naturally cooling to room temperature, putting the solution into a high-speed centrifuge for centrifugation, and separating out the sediment at the bottom;
step five, filtering the supernatant through a 0.22 mu m needle head type filter, and finally obtaining filtrate, namely the prepared hexamethylene tetramine-itaconic acid composite quantum dot CD1-CD2And then freeze-drying the filtrate for later use.
Further, the present invention utilizes FT-IR and fluorescence spectra, respectively, on CD1Quantum dot, CD2Quantum dots and CDs1-CD2The composite quantum dots were characterized and compared for CD1Quantum dot, CD2Quantum dots and CDs1-CD2The corrosion inhibition performance of the composite quantum dots shows that the CD has high corrosion inhibition performance1-CD2The corrosion inhibition performance of the composite quantum dot is obviously better than that of a single CD1Quantum dots and CDs2And (4) quantum dots.
As can be seen from FIG. 1(a), the peak value is 3454cm-1The broad peak of (A) may be CD formation after hexamethylenetetramine bond cleavage1Has a stretching vibration absorption peak of-OH in absorbed water at 1398cm-1The peak is the C-N stretching vibration absorption peak; CD (compact disc)2At 3433cm-1The broad peak of the position is the stretching vibration absorption peak of O-H, and is 1710cm-1The peak is the stretching vibration absorption peak of C ═ O; CD (compact disc)1-CD2At 3452cm-1The wide peaks appearing at the left and right are the stretching vibration absorption peaks of N-H and O-H, and are 1396cm-1The peak is the C-N stretching vibrationAbsorption peak at 1045cm-1The peak around is the C-O stretching vibration absorption peak at 1674cm-1A new peak appears, which is the stretching vibration absorption peak of the amide group, and shows CD2Carboxyl group of (2) and CD1The two are subjected to amidation reaction, and the synthesis of the composite quantum dot CD is deduced1-CD2。
As can be seen from FIG. 1(b), when the CD is used1、CD2And CD1-CD2The concentration is 125mg/L, CD1And CD2When the excitation wavelengths of the two are respectively 360nm and 400nm, the emission wavelengths of the two are between the composite quantum dot CD1-CD2Between the emission wavelengths, which is substantially consistent with the results obtained from the infrared spectrogram, indicating that the composite quantum dot CD is generated1-CD2。
In addition, this embodiment also provides a CD1，CD2And CD1-CD2Respectively adding the corrosion state of the carbon steel after being added into Q235 carbon steel in a 1mol/L HCl environment.
As can be seen from the combination of FIGS. 2(a) and (b), when a corrosion inhibitor CD is added1，CD2And CD1-CD2Then, compared with the blank corrosion current density and the blank impedance, the corrosion current density is lower and lower, and the impedance is higher and higher. Shows that the corrosion inhibitor is added to obviously delay the corrosion of hydrochloric acid to carbon steel and has corrosion inhibition capacity CD1-CD2>CD1>CD2This may be due to CD1The amino functional group in the compound has stronger corrosion inhibition capability than CD2Carboxyl function of (1), CD1-CD2The amide function contained in (1). CD (compact disc)1Amino function of (A) and CD2The carboxyl functional group in the (C) has amidation reaction to generate more amido functional groups, and the amido functional groups can be well combined with iron atoms on the surface of carbon steel and show a CD ratio1And CD2Stronger corrosion inhibition effect.
Furthermore, the invention researches CD prepared by different molar ratios of hexamethylene tetramine and itaconic acid1-CD2The corrosion inhibition performance of the composite quantum dots to Q235 carbon steel is shown by the resultCD prepared by using hexamethylene tetramine and itaconic acid at a molar ratio of 1:31-CD2The corrosion inhibition performance of the composite quantum dot is optimal.
Specifically, the CD prepared in example 1 was used at different molar ratios of hexamethylenetetramine and itaconic acid1-CD2Corrosion state of carbon steel after adding Q235 carbon steel in 1mol/L HCl environment.
As can be seen from fig. 3: in 1.0mol/L HCl, when the molar ratio of hexamethylenetetramine to itaconic acid is different, the prepared corrosion inhibitor has a tendency of increasing and then decreasing the impedance of Q235 carbon steel in the HCl solution, and the corresponding corrosion inhibition rate is also increased and then decreased. When the molar ratio of the hexamethylenetetramine to the itaconic acid monomer is gradually reduced from 1:1 to 1:3, the impedance of the Q235 carbon steel is increased to a greater extent than that of the blank impedance, and the corrosion inhibition performance is enhanced, and when the molar ratio of the hexamethylenetetramine to the itaconic acid monomer is changed from 1:3 to 2:1, the impedance of the Q235 carbon steel is gradually reduced, and the corrosion inhibition performance is weakened, so that the optimal molar ratio of the hexamethylenetetramine to the itaconic acid is 1:3, and the corrosion inhibition rate is maximized. Thus, different molar ratios of hexamethylenetetramine to itaconic acid, resulting in CD1-CD2The corrosion inhibitor has no change on the corrosion inhibition mechanism of the carbon steel, and only influences CD1-CD2When the molar ratio is gradually reduced, more carboxyl groups of itaconic acid are combined on active sites of hexamethylenetetramine to generate more amide groups, the amide groups are coordinated with iron atoms on the surface of carbon steel, so that the thickness of an adsorption film on the surface of the carbon steel is increased, the corrosion inhibition performance is improved, otherwise, competition can be generated among a large number of carboxyl groups when the itaconic acid is continuously increased, the binding capacity with hexamethylenetetramine amino groups is inhibited, the generated amide groups are reduced, and CD is also influenced1-CD2Corrosion inhibitor has corrosion inhibiting performance on carbon steel.
Example 2:
this example shows the application of the composite quantum dot carbon steel corrosion inhibitor of example 1 in 1.0mol/L HCl, with different addition concentrations, to corrosion inhibition of carbon steel under acidic conditions.
As can be seen from fig. 4 (a): it can be known that the corrosion current density is gradually reduced along with the addition of the corrosion inhibitor, which shows that the addition of the corrosion inhibitor obviously prevents iron atoms on the surface of the carbon steel from further depositing on the surface of the anode, and the discharge of hydrogen ions in the cathode area of the metal surface increases the overpotential of the hydrogen evolution reaction process, slows down the acid corrosion process and inhibits the occurrence of corrosion.
As can be seen from FIG. 4(b), the resistance of carbon steel is low in a 1mol/L HCl environment, probably due to direct exposure of carbon steel to corrosive media. However, the resistance in the hydrochloric acid environment increased with the addition of the corrosion inhibitor, and the degree of increase increased with the increase of the concentration of the corrosion inhibitor, which indicates that the corrosion inhibitor CD1-CD2Has better corrosion resistance to carbon steel. This is due to the CD1-CD2Contains abundant lone pair electrons which can coordinate with iron atom vacancies on the surface of the carbon steel, thereby occupying the vacancy tracks of the iron atoms and achieving the purpose of corrosion inhibition. The result shows that the corrosion of the carbon steel is relieved, and the corrosion inhibitor is well adsorbed on the surface of the carbon steel, so that the surface of the carbon steel has stronger corrosion protection capability.
Claims (7)
1. The composite quantum dot carbon steel corrosion inhibitor is characterized in that the composite quantum dot carbon steel corrosion inhibitor is hexamethylenetetramine-itaconic acid composite quantum dot CD1-CD2。
2. The composite quantum dot carbon steel corrosion inhibitor as claimed in claim 1, wherein the composite quantum dot carbon steel corrosion inhibitor is prepared by taking hexamethylenetetramine and itaconic acid as raw materials and performing heat preservation reaction at 150 ℃ by a hydrothermal method.
3. The preparation method of the composite quantum dot carbon steel corrosion inhibitor as claimed in claim 1, characterized in that hexamethylenetetramine and itaconic acid are used as raw materials, and a hydrothermal method is adopted to prepare the composite quantum dot carbon steel corrosion inhibitor by heat preservation reaction at 150 ℃.
4. The preparation method of the composite quantum dot carbon steel corrosion inhibitor as claimed in claim 3, wherein the method is specifically carried out according to the following steps:
dissolving hexamethylenetetramine in water, and magnetically stirring to uniformly mix the solution;
adding itaconic acid into a hexamethylenetetramine solution;
transferring the solution into a high-pressure reaction kettle, heating the solution to 150 ℃ in an oven, and keeping the temperature for 12 hours;
taking the reaction kettle out of the oven after heating is finished, naturally cooling to room temperature, putting the solution into a high-speed centrifuge for centrifugation, and separating out the sediment at the bottom;
step five, filtering the supernatant through a needle filter to obtain a filtrate, namely the prepared hexamethylene tetramine-itaconic acid composite quantum dot CD1-CD2And then freeze-drying the filtrate for later use.
5. The preparation method of the composite quantum dot carbon steel corrosion inhibitor as claimed in claim 4, wherein the molar ratio of hexamethylenetetramine to itaconic acid is 1: 3.
6. Use of a composite quantum dot carbon steel corrosion inhibitor according to claim 1 or 2 for inhibiting corrosion of carbon steel under acidic conditions.
7. The use of claim 6, wherein the Q235 carbon steel is in a 1mol/L HCl environment when the composite quantum dot carbon steel corrosion inhibitor is added in an amount of 200 mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321472.9A CN112609184B (en) | 2020-11-23 | 2020-11-23 | Composite quantum dot carbon steel corrosion inhibitor, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321472.9A CN112609184B (en) | 2020-11-23 | 2020-11-23 | Composite quantum dot carbon steel corrosion inhibitor, preparation method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112609184A true CN112609184A (en) | 2021-04-06 |
| CN112609184B CN112609184B (en) | 2022-07-19 |
Family
ID=75225325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011321472.9A Active CN112609184B (en) | 2020-11-23 | 2020-11-23 | Composite quantum dot carbon steel corrosion inhibitor, preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112609184B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113913830A (en) * | 2021-10-26 | 2022-01-11 | 中北大学 | Environment-friendly biomass carbon quantum dot corrosion inhibitor, and preparation method and application thereof |
| CN115216290A (en) * | 2022-07-29 | 2022-10-21 | 北京科技大学 | Modified carbon dot with dual functions of corrosion early warning and corrosion inhibition and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4217216A (en) * | 1977-04-01 | 1980-08-12 | The Mogul Corporation | Corrosion inhibiting compositions |
| CN101988201A (en) * | 2009-08-07 | 2011-03-23 | 中国科学院海洋研究所 | Oligochitosan carbon steel seawater corrosion inhibitor and application thereof |
| CN107385456A (en) * | 2017-08-17 | 2017-11-24 | 中国科学院宁波材料技术与工程研究所 | Environmentally friendly restrainer is applied with it |
| WO2018038690A1 (en) * | 2016-08-26 | 2018-03-01 | Gerengi Huesnue | Boronium cation doped corrosion inhibitor |
| CN108056107A (en) * | 2017-12-11 | 2018-05-22 | 常州中翔科技有限公司 | A kind of compound corrosion-mitigation scale-inhibition fungicide and preparation method thereof |
| CN109763135A (en) * | 2019-02-25 | 2019-05-17 | 华中科技大学 | A kind of graphene oxide quantum dot and preparation method thereof and the application as corrosion inhibiter |
| CN109837544A (en) * | 2017-11-24 | 2019-06-04 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiting and descaling agent and preparation method thereof |
| CN111848468A (en) * | 2020-07-29 | 2020-10-30 | 河南大学 | Cysteamine derivative, preparation method thereof and application of cysteamine derivative as carbon steel pickling corrosion inhibitor |
-
2020
- 2020-11-23 CN CN202011321472.9A patent/CN112609184B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4217216A (en) * | 1977-04-01 | 1980-08-12 | The Mogul Corporation | Corrosion inhibiting compositions |
| CN101988201A (en) * | 2009-08-07 | 2011-03-23 | 中国科学院海洋研究所 | Oligochitosan carbon steel seawater corrosion inhibitor and application thereof |
| WO2018038690A1 (en) * | 2016-08-26 | 2018-03-01 | Gerengi Huesnue | Boronium cation doped corrosion inhibitor |
| CN107385456A (en) * | 2017-08-17 | 2017-11-24 | 中国科学院宁波材料技术与工程研究所 | Environmentally friendly restrainer is applied with it |
| CN109837544A (en) * | 2017-11-24 | 2019-06-04 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiting and descaling agent and preparation method thereof |
| CN108056107A (en) * | 2017-12-11 | 2018-05-22 | 常州中翔科技有限公司 | A kind of compound corrosion-mitigation scale-inhibition fungicide and preparation method thereof |
| CN109763135A (en) * | 2019-02-25 | 2019-05-17 | 华中科技大学 | A kind of graphene oxide quantum dot and preparation method thereof and the application as corrosion inhibiter |
| CN111848468A (en) * | 2020-07-29 | 2020-10-30 | 河南大学 | Cysteamine derivative, preparation method thereof and application of cysteamine derivative as carbon steel pickling corrosion inhibitor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113913830A (en) * | 2021-10-26 | 2022-01-11 | 中北大学 | Environment-friendly biomass carbon quantum dot corrosion inhibitor, and preparation method and application thereof |
| CN115216290A (en) * | 2022-07-29 | 2022-10-21 | 北京科技大学 | Modified carbon dot with dual functions of corrosion early warning and corrosion inhibition and preparation method thereof |
| CN115216290B (en) * | 2022-07-29 | 2024-03-29 | 北京科技大学 | Modified carbon dot with dual functions of corrosion early warning and corrosion inhibition and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112609184B (en) | 2022-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112609184B (en) | Composite quantum dot carbon steel corrosion inhibitor, preparation method and application | |
| Youda et al. | SERS and impedance study of the equilibrium between complex formation and adsorption of benzotriazole and 4-hydroxybenzotriazole on a copper electrode in sulphate solutions | |
| Hu et al. | The properties and photocatalytic performance comparison of Fe 3+-doped gC 3 N 4 and Fe 2 O 3/gC 3 N 4 composite catalysts | |
| Zheng et al. | Enhancing the luminescence of carbon dots with a reduction pathway | |
| Prashantha et al. | Photoluminescence and thermoluminescence studies of Mg2SiO4: Eu3+ nano phosphor | |
| Luo et al. | Aryl-modified graphene quantum dots with enhanced photoluminescence and improved pH tolerance | |
| Bernet et al. | Formation of a supramolecular chromophore: a spectroscopic and theoretical study | |
| Khan et al. | DFT study of superhalogen and superalkali doped graphitic carbon nitride and its non-linear optical properties | |
| WO2014084797A1 (en) | Method for forming nitrogen and sulfur co-doped graphene quantum dots | |
| Kang et al. | Electrochemical synthesis and characterization of formic acid-graphite intercalation compound | |
| JPH0261519B2 (en) | ||
| Rajkumar et al. | Study of the corrosion protection efficiency of polypyrrole/metal oxide nanocomposites as additives in anticorrosion coating | |
| Liu et al. | A Reverse Strategy to Restore the Moisture‐deteriorated Luminescence Properties and Improve the Humidity Resistance of Mn4+‐doped Fluoride Phosphors | |
| Fukami et al. | Structural refinements and thermal properties of L (+)-tartaric, D (–)-tartaric, and monohydrate racemic tartaric acid | |
| Lin et al. | Plasma-electrochemical synthesis of europium doped cerium oxide nanoparticles | |
| Li et al. | A hydrophobic high-crystalline g-C3N4/epoxy resin composite coating with excellent durability and stability for long-term corrosion resistance | |
| Fan et al. | Toward high-efficiency photoluminescence emission by fluorination of graphene oxide: Investigations from excitation to emission evolution | |
| Pandey et al. | Optical studies of europium-doped ZnO nanoparticles prepared by sol–gel technique | |
| Li et al. | Environmentally friendly synthesis of oxygen-doped g-C3N4 nanosheets for enhancing photocatalytic corrosion resistance of carbon steel | |
| Abdallah et al. | Breakdown of passivity of nickel electrode in sulfuric acid and its inhibition by pyridinone derivatives using the galvanostatic polarization technique | |
| Li et al. | Microwave‐Assisted Hydrothermal Synthesis of Fe 2 O 3‐Sensitized SrTiO 3 and its Luminescent Photocatalytic de NO x Activity with CaAl 2 O 4:(Eu, Nd) Assistance | |
| Nascimento et al. | Carbon dots as corrosion inhibitors: synthesis, molecular structures and corrosion inhibition | |
| CN110776467A (en) | Corrosion inhibitor based on benzimidazole derivative and preparation method and application thereof | |
| CN110628062A (en) | Light color adjustable rare earth-based nano polymer composite cellulose film and preparation method thereof | |
| Long et al. | A novel effective carbon dots-based inhibitor for carbon steel against chloride corrosion: From inhibition behavior to mechanism |
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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240314 Address after: 710000 No. B49, Xinda Zhongchuang space, 26th Street, block C, No. 2 Trading Plaza, South China City, international port district, Xi'an, Shaanxi Province Patentee after: Xi'an Huaqi Zhongxin Technology Development Co.,Ltd. Country or region after: China Address before: 710055 No. 13, Yanta Road, Shaanxi, Xi'an Patentee before: XIAN University OF ARCHITECTURE AND TECHNOLOG Country or region before: China |
|
| TR01 | Transfer of patent right |