CN109183042A - The preparation method of methionine corrosion inhibiter for 1045 carbon steel salt eutectic phase-change cool storage material solution - Google Patents
The preparation method of methionine corrosion inhibiter for 1045 carbon steel salt eutectic phase-change cool storage material solution Download PDFInfo
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- CN109183042A CN109183042A CN201810813759.XA CN201810813759A CN109183042A CN 109183042 A CN109183042 A CN 109183042A CN 201810813759 A CN201810813759 A CN 201810813759A CN 109183042 A CN109183042 A CN 109183042A
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- methionine
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- 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
- C23F11/14—Nitrogen-containing compounds
- C23F11/149—Heterocyclic compounds containing nitrogen as hetero atom
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a kind of preparation methods of methionine corrosion inhibiter for 1045 carbon steel salt eutectic phase-change cool storage material solution.(1) 38.108 g are weighed and analyze pure anhydrous sodium sulfate, the pure ammonium chloride of 12.4 g analysis, the pure potassium chloride of 6.2 g analysis, 6.2 g analysis pure phosphoric acid ammonium dihydrogen, the pure borax of 3.8 g analysis and 5.0g carboxymethyl cellulose, 128.3 mL distilled water are added, obtain salt eutectic phase-change cool storage material.(2) the pure methionine of analysis for weighing 0.0149~0.7460 g is dissolved in 100 mL step (1) acquired solutions, and 100 mL solubility ranges after dissolution to obtain the final product are the methionine corrosion inhibiter of the mol/L of 0.001 mol/L~0.05.The present invention is able to suppress corrosion rate of 1045 carbon steels as salt eutectic phase-change cool storage material solution container, and easy to operate, low in cost, environmentally protective.
Description
Technical field
The present invention relates to a kind of systems of methionine corrosion inhibiter suitable for 1045 carbon steel salt eutectic phase-change cool storage material solution
Preparation Method.
Background technique
Salt eutectic phase-change cool storage material is that the high concentration ion mixing that is made of inorganic salts, water and other additive is molten
Liquid, can be absorbed from external environment in the form of latent heat during being generated phase change by heating (or cooling) (or release
Put) go out a large amount of heat.Cost with production is low, energy storage density is big, process is easy to control, savings/release heat is approximate
The features such as Deng can mildly be used repeatedly, is widely applied in multiple fields.But salt eutectic phase-change cool storage material macroion
The liquid phase state of concentration can make canister that serious corrosion occur, and seriously limit its development and application.
Corrosion inhibiter be it is a kind of by a certain concentration and in the form of be present in environment or corrosive medium, and prevent or slow down metal corruption
The mixture of the chemical substance of erosion or several chemical substances.The dosage of corrosion inhibiter be usually all it is micro, in low concentration appropriate
Very efficient corrosion mitigating effect can be played under state, slow down the corrosion of metallic matrix or even the speed of corrosion can be reduced to zero,
The performance for being also able to maintain metal material simultaneously is constant.
The nutriment that amino acid is needed as human body has good water solubility, and price is low, and source is wide, and green is harmless, can quilt
The advantages that biodegradable.In general the functional group containing hetero atom or aromatic rings is that organic molecule and metal occur coordination and inhale
Attached active site, and amino acid has acidic carboxypolymer and basic amine group simultaneously, can adsorb to form one layer in iron surface
Molecular film prevents iron from corroding in corrosive medium, corrosion inhibition with higher with this.
Summary of the invention
The purpose of the present invention aims to solve the problem that corrosion of 1045 carbon steels in salt eutectic phase-change cool storage material solution, by using
Methionine molecule inhibits the methionine inhibition of corrosion of 1045 carbon steels in salt eutectic phase-change cool storage material solution as corrosion inhibiter
The preparation method of agent.
Methionine is a kind of common natural amino acid, has nontoxic, and yield is big, feature at low cost.Molecule knot
Containing with heteroatomic characteristic group in structure, these groups can be used as methionine molecule and Coordination Adsorption occurs for metallic substrates
Active site makes methionine Molecular Adsorption in metal surface, certain corrosion inhibition is played to metal, is a kind of preferable green
Corrosion inhibiter.
Specific steps are as follows:
(1) it weighs 38.108g respectively with assay balance and analyzes pure anhydrous sodium sulfate, the pure ammonium chloride of 12.4g analysis, 6.2g
It analyzes pure potassium chloride, 6.2g analysis pure phosphoric acid ammonium dihydrogen, 3.8g and analyzes pure borax and 5.0g carboxymethyl cellulose (CMC), be added
128.3mL distilled water, is dissolved using magnetic stirring apparatus, is configured to salt eutectic phase-change cool storage material solution.
(2) the pure methionine of analysis for weighing 0.0149~0.7460g is dissolved in the resulting eutectic salts phase of 100mL step (1)
Become in cool storage material solution, the 100mL solubility range obtained after completely dissolution is the egg of 0.001mol/L~0.05mol/L
Propylhomoserin corrosion inhibiter.
(3) at room temperature, to enclose epoxy resin and one end bare area as 0.5024cm2, the other end is with copper conductor
1045 carbon steel rods of connection are working electrode, and saturated calomel electrode is as reference electrode, the platinized platinum having a size of 1.0cm × 1.8cm
Electrode is to electrode, and electrolytic cell is 100mL beaker, uses CHI760e electrochemical workstation in a manner of traditional three-electrode system
Measure impedance data and Tafel polarization curve of the 1045 Steel Work electrodes in the etchant solution that step (2) prepares
Data evaluate corrosion inhibition.
The solubility range of methionine is 0.001mol/L~0.05mol/L, wherein optimal solubility is 0.05mol/L.
The method have the characteristics that in only being needed in the state of being slowly stirred under room temperature in salt eutectic phase-change cold-storage
The methionine of certain mass is added to being completely dissolved in material solution, and stands 2 hours, preferably salt eutectic phase-change can be inhibited to store
Corrosion of the cold material solution to 1045 carbon steels.It can show that methionine corrosion inhibiter adds in testing its impedance data under room temperature
When solubilization degree is 0.001mol/L~0.05mol/L, inhibition efficiency can reach 80.43%.The test of Tafel polarization curve
It can be concluded that methionine corrosion inhibiter adds solubility range when adding solubility is 0.001mol/L~0.05mol/L, 1045 carbon steels
Corrosion electric current density by 27.12 μ A/cm2It is reduced to 5.06 μ A/cm2.High degree inhibits 1045 carbon steels in eutectic salts phase
Become the corrosion rate in cool storage material solution.
Inhibition efficiency () calculation formula is as follows:
It is wherein RctFor the Charge-transfer resistance after addition corrosion inhibiter, R0 ctIt is stored to be not added with the salt eutectic phase-change of corrosion inhibiter
The Charge-transfer resistance of cold material solution.
Detailed description of the invention
Fig. 1 is the obtained Nyquist impedance spectrum of ac impedance measurement in embodiment 1.
Fig. 2 is that Tafel polarization curve tests obtained Tafel polarization curve map in embodiment 1.
Fig. 3 is the obtained Nyquist impedance spectrum of ac impedance measurement in embodiment 2.
Fig. 4 is that Tafel polarization curve tests obtained Tafel polarization curve map in embodiment 2.
Specific embodiment
Embodiment 1:
(1) it weighs 38.108g respectively with assay balance and analyzes pure anhydrous sodium sulfate, the pure ammonium chloride of 12.4g analysis, 6.2g
It analyzes pure potassium chloride, 6.2g analysis pure phosphoric acid ammonium dihydrogen, 3.8g and analyzes pure borax and 5.0g CMC, measure 128.3 mL with graduated cylinder
Weighed drug is dissolved in the distilled water of measurement using magnetic stirring apparatus, is configured to salt eutectic phase-change coolness storing material by distilled water
Expect solution.
(2) the pure methionine of analysis for first weighing 0.7460g is dissolved in the resulting salt eutectic phase-change cold-storage of 100mL step (1)
The methionine corrosion inhibiter that 100mL concentration is 0.05mol/L is obtained in material solution after completely dissolution.
(3) at room temperature, to enclose epoxy resin and one end bare area as 0.5024cm2, the other end is with copper conductor
1045 carbon steel rods of connection are working electrode, and saturated calomel electrode is as reference electrode, the platinized platinum having a size of 1.0cm × 1.8cm
Electrode is to electrode, and electrolytic cell is 100mL beaker, uses CHI760e electrochemical workstation in a manner of traditional three-electrode system
Measure impedance data and Tafel polarization curve of the 1045 Steel Work electrodes in the etchant solution that step (2) prepares
Data evaluate corrosion inhibition.
Fig. 1 is salt eutectic phase-change cool storage material solution of obtained 1045 carbon steels of embodiment 1 in addition methionine corrosion inhibiter
In Nyquist impedance spectrum.Fig. 2 is the Tafel polarization curve map for the addition methionine corrosion inhibiter that embodiment 1 obtains.
Embodiment 2:
(1) it weighs 38.108g respectively with assay balance and analyzes pure anhydrous sodium sulfate, the pure ammonium chloride of 12.4g analysis, 6.2g
It analyzes pure potassium chloride, 6.2g analysis pure phosphoric acid ammonium dihydrogen, 3.8g and analyzes pure borax and 5.0g CMC, measure 128.3 mL with graduated cylinder
Weighed drug is dissolved in the distilled water of measurement using magnetic stirring apparatus, is configured to salt eutectic phase-change coolness storing material by distilled water
Expect solution.
(2) the pure methionine of analysis for first weighing 0.1492g is dissolved in the resulting salt eutectic phase-change cold-storage of 100mL step (1)
In material solution, the methionine corrosion inhibiter that 100mL concentration is 0.01mol/L is obtained after completely dissolution.
(3) at room temperature, to enclose epoxy resin and one end bare area as 0.5024cm2, the other end is with copper conductor
1045 carbon steel rods of connection are working electrode, and saturated calomel electrode is as reference electrode, the platinized platinum having a size of 1.0cm × 1.8cm
Electrode is to electrode, and electrolytic cell is 100mL beaker, uses CHI760e electrochemical workstation in a manner of traditional three-electrode system
Measure impedance data and Tafel polarization curve of the 1045 Steel Work electrodes in the etchant solution that step (2) prepares
Data evaluate corrosion inhibition.
Fig. 3 is salt eutectic phase-change cool storage material solution of obtained 1045 carbon steels of embodiment 2 in addition methionine corrosion inhibiter
In Nyquist impedance spectrum.Fig. 4 is the Tafel polarization curve map for the addition methionine corrosion inhibiter that embodiment 2 obtains.
FIG. 1 to FIG. 4 can protrude the features of the present invention.
Claims (1)
1. a kind of preparation method of the methionine corrosion inhibiter for 1045 carbon steel salt eutectic phase-change cool storage material solution, feature exist
In specific steps are as follows:
(1) 38.108 g are weighed respectively with assay balance and analyze pure anhydrous sodium sulfate, the pure ammonium chloride of 12.4 g analysis, 6.2 g points
It analyses pure potassium chloride, 6.2 g analysis pure phosphoric acid ammonium dihydrogen, 3.8 g and analyzes pure borax and 5.0g carboxymethyl cellulose, be added 128.3
ML distilled water, is dissolved using magnetic stirring apparatus, is configured to salt eutectic phase-change cool storage material solution；
(2) the pure methionine of analysis for weighing 0.0149~0.7460 g is dissolved in the 100 resulting eutectic salts phases of mL step (1)
Become in cool storage material solution, the 100 mL solubility ranges obtained after completely dissolution are the mol/L of 0.001 mol/L~0.05
Methionine corrosion inhibiter.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123253A (en) * | 1994-09-12 | 1996-05-29 | 罗姆和哈斯公司 | Method of inhibiting corrosion in aqueous systems using poly(amino acids) |
| CN101285193A (en) * | 2007-04-09 | 2008-10-15 | 比亚迪股份有限公司 | Acidic solution for treating surface of magnesium alloy and processing method |
| CN105002505A (en) * | 2015-07-03 | 2015-10-28 | 桂林理工大学 | Preparation method of indigo carmine/benzyltrimethyl ammonium bromide composite corrosion inhibitor used for 1045 carbon steel hydrochloric acid pickling solution |
| CN107460486A (en) * | 2017-04-12 | 2017-12-12 | 西南石油大学 | A kind of triphenylamine aldehyde derivative and amino acid composite corrosion inhibitor and its application method |
-
2018
- 2018-07-23 CN CN201810813759.XA patent/CN109183042A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123253A (en) * | 1994-09-12 | 1996-05-29 | 罗姆和哈斯公司 | Method of inhibiting corrosion in aqueous systems using poly(amino acids) |
| CN101285193A (en) * | 2007-04-09 | 2008-10-15 | 比亚迪股份有限公司 | Acidic solution for treating surface of magnesium alloy and processing method |
| CN105002505A (en) * | 2015-07-03 | 2015-10-28 | 桂林理工大学 | Preparation method of indigo carmine/benzyltrimethyl ammonium bromide composite corrosion inhibitor used for 1045 carbon steel hydrochloric acid pickling solution |
| CN107460486A (en) * | 2017-04-12 | 2017-12-12 | 西南石油大学 | A kind of triphenylamine aldehyde derivative and amino acid composite corrosion inhibitor and its application method |
Non-Patent Citations (1)
| Title |
|---|
| ZHE ZHANG等: "Inhibition of carbon steel corrosion in phase-change-materials solution by methionine and proline", 《CORROSION SCIENCE》 * |
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Application publication date: 20190111 |