CN102031528A - Corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and preparation method thereof - Google Patents
Corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and preparation method thereof Download PDFInfo
- Publication number
- CN102031528A CN102031528A CN 201010600828 CN201010600828A CN102031528A CN 102031528 A CN102031528 A CN 102031528A CN 201010600828 CN201010600828 CN 201010600828 CN 201010600828 A CN201010600828 A CN 201010600828A CN 102031528 A CN102031528 A CN 102031528A
- Authority
- CN
- China
- Prior art keywords
- corrosion
- thick
- oil
- gas field
- inhibiter
- 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
Images
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to a corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and a preparation method thereof. The corrosion inhibitor consists of the following raw materials in part by mass: 1 to 1.2 parts of crude quinoline salt-based mixture, 0.2 to 0.4 part of alkali amide compound, 0.4 to 0.6 part of chloralkane compound and 4 to 5 parts of ethanol through a synthetic reaction. Coupon tests in labs and on site and electrochemical tests prove that: the corrosion inhibitor has corrosion inhibiting effect in a sulfur-containing medium. The corrosion inhibitor is low in cost and easy to synthesize, and has high-efficiency practice effect.
Description
Technical field:
The present invention relates to a kind of oil-gas field steel equipment rot-resistant inhibiter and preparation method thereof that is used for, belong to the petroleum industry aseptic technic.
Background technology:
Statistical information shows, corrosion loss is first of the various natural disasteies.Control can economize on resources on the one hand in a large number with the control corrosion, has also saved the energy, the manpower of producing starting material and equipment simultaneously, and is of far-reaching significance.
In the petroleum industry, a lot of links such as oil, gas extraction, refinement, transportation all exist steel equipment and face the corrosive problem, and along with the prolongation of exploitation of oil-gas field time, the corrosion composition in the oil gas well is more and more, makes the situation of equipment corrosion more serious.Serious corrosion causes the inefficacy of equipment on the one hand, and more exchange device has increased cost of winning, and on the other hand, the corrosion of transport pipeline causes the instability of pressure to bring potential safety hazard.Solve the etching problem of oil-gas field equipment, become the important gordian technique in the current oilfield engineering.
What oil-gas field was mainly faced is sulfur corrosion, and usually the anticorrosion means that adopt mainly contain leading portion doctor treatment, inside coating method and add method such as inhibiter, adds wherein that inhibiter is with low cost, easy and simple to handle with it, effect obviously is widely used.The inhibiter of China's oil-gas field application at present mainly is a hybrid corrosion inhibitor, and on chemical ingredients, its composition interacts based on organism and metallic surface and forms preservative coat, suppresses corrosive and takes place; From electrochemical angle, it can reduce the current potential of corrosion negative and positive two-stage simultaneously, thereby brings energy battier to corrosive.
But along with metallic substance preservative coats such as iron and steel thicken, can occur depositing the situation of dirt settling again, dirt settling enters the obstruction that equipment such as compressor causes runner, can give again to produce and maintenance bring very big difficulty.
Compressor station situation with certain oil-gas field is an example, and this compressor station begins to have used a kind of vapour-phase inhibitor from nineteen ninety, begins to operate steadily in several years, and growing with time just goes wrong.Although sustained release dosage has certain effect, if do not annotate afterwards or few filling, then can on compressor impeller, axle and diffuser-, separate out hard material, if continuation is annotated then formed a large amount of dirt settlings, produce at labyrinth seal equally and gather, the wearing and tearing rotor.Compressor station is had to increase the parking maintenance frequency and is normally moved with assurance equipment.The formation amount that suppresses dirt settling under the prerequisite that guarantees corrosion inhibition rate is one of key point of inhibiter research and development.
Summary of the invention:
The object of the invention is to provide a kind of oil-gas field steel equipment rot-resistant inhibiter and preparation method thereof that is used for, and the present invention is with low cost, be easy to synthesize, and has and imitates high practice effect.
The mass fraction that is used for oil-gas field steel equipment rot-resistant inhibiter constitutive material provided by the invention:
Thick quinolinium based mixtures 1～1.2
Alkali amide compound 0.2～0.4
Chloroparaffin compound 0.4～0.6
Ethanol (95%) 4～5
Wherein said thick quinolinium based mixtures is to produce in the coal tar process, and thick quinoline extracts the waste material after quinoline and the isoquinoline 99.9, and its main component is toluquinoline (about 40%), ethyl quinoline and methyl-ethyl quinoline homologues such as (about 60%); The alkali amide compound is at least a of sodium amide and potassium amide; The general molecular formula of chloroparaffin compound is C
nH
2n+1Cl, n=6 wherein, 7,8,9,10.
A kind of mass fraction that is used for oil-gas field steel equipment rot-resistant inhibiter constitutive material provided by the invention::
Thick quinolinium based mixtures 1
Potassium amide 0.2
One chloro-octane 0.5
Ethanol (95%) 4
The step that a kind of preparation method who is used for oil-gas field steel equipment corrosion inhibitor provided by the invention comprises:
1) in thick quinolinium based mixtures, adds potassium amide, constantly be stirred to dissolving fully, form the mixture of stable homogeneous;
2) with 1) described mixture and alkali amide compound blend, be heated with stirring to 250 ℃ of reactions 4 hours, reaction finishes the after product cold filtration and takes down residue, obtains liquid phase mixture.
3) with 2) described liquid phase mixture and ethanol mixes according to 1: 4 mass ratio.
Be mixed with inhibiter by above-mentioned metering, can join in the corrosive environment and use.The equal corrosion mitigating effect of metal material in the scope of application of the present invention: pH=5.0～8.0 media, and have good metal surface filming performance.
That the present invention has is with low cost, be easy to the synthetic characteristics, adopts this inhibiter indoor hanging test that experimentizes, and steel disc surface, test back is bright black, has obtained higher corrosion inhibition rate.By electrochemical measurement, its polarization resistance has had the raising of very big degree, hanging film scene test-results to show that also inhibiter has played provide protection by covering the film forming effect to metal than space state.
Description of drawings
Fig. 1 is example 2 empty sample polarization curves of the present invention.
Fig. 2 is for adding inhibiter sample polarization curve in the example 2 of the present invention.
Fig. 3 is hanging film scene testing apparatus synoptic diagram in the example 3 of the present invention.
Fig. 4 is the stereoscan photograph of experiment test piece in the example 3 of the present invention.A is for before testing; B is before blank test is cleaned; C is after blank test is cleaned; D is before the dosing test is cleaned; E is after the dosing test is cleaned.
Embodiment:
Below in conjunction with specific embodiment the present invention is described in further detail, but these embodiment do not limit the scope of the invention.
Example 1 is the corrosion inhibition evaluation to inhibiter of the synthetic and preparation of inhibiter and laboratory hanging slice method.The laboratory hanging slice method is that preparation etchant solution in laboratory is simulated actual corrosive environment and carried out the corrosion coupon experiment.Select for use A3 steel (structural carbon steel) test piece to carry out corrosion experiment, adopt blank and add inhibiter to compare,, calculate corrosion inhibition rate according to the corrosion weight loss and the corrosion condition of test piece.
Example 2 is the corrosion inhibition evaluation of electrochemical process to inhibiter.Adopt the three-electrode system of A3 steel sample-platinum electrode-saturated Repone K electric shock to measure it adds and be the interpolation inhibiter in saturated hydrogen sulfide solution electrochemical behavior respectively.
Example 3 is the corrosion inhibition evaluation to inhibiter of the synthetic and preparation of inhibiter and hanging film scene method.The hanging film scene method is the corrosion coupon test of carrying out in the shunting device in parallel with the Sweet natural gas whizzer.Select for use A3 steel (structural carbon steel) test piece to carry out corrosion experiment, adopt blank and add inhibiter to compare,, calculate corrosion inhibition rate according to the corrosion weight loss and the corrosion condition of test piece, and by scanning electron microscopic observation lacing film surface microscopic topographic.
Example 1:
Proportioning: thick quinolinium based mixtures 1kg
Potassium amide 0.2kg
One chloro-octane 0.5kg
Ethanol 4kg
In thick quinolinium based mixtures [its main component is toluquinoline (about 40%), ethyl quinoline and methyl-ethyl quinoline homologues such as (about 60%)], add potassium amide, constantly be stirred to dissolving fully, form the mixture of stable homogeneous, again with a chloro-octane blend, be heated with stirring to 250 ℃ of reactions 4 hours, reaction finishes the after product cold filtration and takes down residue, obtains liquid phase mixture.Liquid phase mixture and ethanol (95%) mix according to 1: 4 mass ratio, obtain inhibiter.
Test is carried out in the 1L wide-necked bottle, interior dress H
2S aqueous solution 400mL, 10 * 10 * 3 the steel disc sample that is equipped with the A3 steel hangs on the support as for more than the liquid level in the bottle.Totally two bottles, each hangs 5, and one of them adds inhibiter (inhibiter is contained in the small beaker, and about 3ml places wide-necked bottle again), and one is blank.Bottle after the sealing is placed in 50 ℃ the constant temperature water bath apparatus, and 5d is under static state carried out in test, takes out the back and adopts the weighing of weightening finish method to calculate vapor phase corrosion inhibitor efficient.In the laboratory experiment, the vapor phase corrosion inhibitor rate 63% of this inhibiter.Weightless data see Table 1.
Example 2:
Proportioning: with example 1
In thick quinolinium based mixtures, add potassium amide, constantly be stirred to dissolving fully, form the mixture of stable homogeneous, again with a chloro-octane blend, be heated with stirring to 250 ℃ of reactions 4 hours, reaction finishes the after product cold filtration and takes down residue, obtains liquid phase mixture.Liquid phase mixture and ethanol mix according to 1: 4 mass ratio, obtain inhibiter.
Test adopts the three-electrode system of A3 steel sample-platinum electrode-saturated Repone K electrode to measure it adds and be the interpolation inhibiter in saturated hydrogen sulfide solution electrochemical behavior respectively.
Blank test and to add polarization resistance and other electrochemical parameters of inhibiter test as shown in table 2.After adding inhibiter (concentration 1%vol) as can be seen, corrosion electric current density reduces, and polarization resistance is enhanced.
Blank test and add the polarization curve of inhibiter test such as attached illustrated in figures 1 and 2.As can be seen, inhibiter has suppressed corrosive negative electrode and anodic process simultaneously, is hybrid corrosion inhibitor.
Example 3:
Proportioning: with example 1
In thick quinolinium based mixtures, add potassium amide, constantly be stirred to dissolving fully, form the mixture of stable homogeneous, again with a chloro-octane blend, be heated with stirring to 250 ℃ of reactions 4 hours, reaction finishes the after product cold filtration and takes down residue, obtains liquid phase mixture.Liquid phase mixture and ethanol mix according to 1: 4 mass ratio, obtain inhibiter.
The experiment place of carrying out is the water cooler of the shunting device in parallel with the Sweet natural gas whizzer, as shown in Figure 3.The test piece of A3 steel is fastened on the hanger in the water cooler by bolt, behind the sealing water cooler and the Sweet natural gas flow process be communicated with, carry out 20 days on-the-spot corrosion test.
See after the off-test that the test piece surface is bright black, stereoscan photograph shows that its surface has formed the inhibiter mulch film, and provide protection has been played in test piece, sees Fig. 4.The data of zero-G test show test piece no obvious quality change before and after test, see Table 3, illustrate that corrosion mitigating effect is good.
The weightless data of table 1 example 1
The electrochemical data of table 2 example 2
| Check sample | Add inhibiter | |
| Corrosion electric current density Icorr | 11.2A | 466nA |
| Corrosion potential Ecorr | -690mV | -636mV |
| Polarization resistance Rp | 2.326kohms | 136.5kohms |
| Corrosion rate | 5.119mpy | 212.8e-3mpy |
The weightless data of table 3 example 3
| Numbering | 1 | 2 | 3 | 4 | 5 |
| Before the experiment/g | 9.9498 | 9.9343 | 9.9088 | 10.0996 | 9.6689 |
| Experiment back/g | 9.9491 | 9.9342 | 9.9088 | 10.0994 | 9.6687 |
Claims (3)
1. one kind is used for oil-gas field steel equipment rot-resistant inhibiter, it is characterized in that the mass fraction of its constitutive material:
Thick quinolinium based mixtures 1～1.2
Alkali amide compound 0.2～0.4
Chloroparaffin compound 0.4～0.6
Ethanol 4～5
The main component of wherein said thick quinolinium based mixtures is the homologue of toluquinoline, ethyl quinoline and methyl-ethyl quinoline; The alkali amide compound is at least a of sodium amide and potassium amide; The general molecular formula of chloroparaffin compound is C
nH
2n+1Cl, n=6 wherein, 7,8,9,10.
2. one kind is used for oil-gas field steel equipment rot-resistant inhibiter, it is characterized in that the mass fraction of its constitutive material:
Thick quinolinium based mixtures 1
Potassium amide 0.2
One chloro-octane 0.5
Ethanol 4
Described thick quinolinium based mixtures is to produce in the coal tar process, and thick quinoline extracts the waste material after quinoline and the isoquinoline 99.9, and its main component is toluquinoline and the ethyl quinoline of quality 60% and the homologue of methyl-ethyl quinoline of quality 40%.
3. described preparation method who is used for oil-gas field steel equipment rot-resistant inhibiter of claim 1 is characterized in that the step that comprises:
1) in thick quinolinium based mixtures, adds the alkali amide compound by proportioning, constantly be stirred to dissolving fully, form the mixture of stable homogeneous;
2) with 1) described mixture and the blend of chloroparaffin compound, be heated with stirring to 250 ℃ of reactions 4 hours, reaction finishes the after product cold filtration and takes down residue, obtains liquid phase mixture.
3) with 2) described liquid phase mixture and ethanol mixes according to 1: 4 mass ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106008282A CN102031528B (en) | 2010-12-22 | 2010-12-22 | Corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106008282A CN102031528B (en) | 2010-12-22 | 2010-12-22 | Corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102031528A true CN102031528A (en) | 2011-04-27 |
| CN102031528B CN102031528B (en) | 2012-05-30 |
Family
ID=43884955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106008282A Expired - Fee Related CN102031528B (en) | 2010-12-22 | 2010-12-22 | Corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102031528B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562037A (en) * | 2013-10-24 | 2015-04-29 | 中国石油化工股份有限公司 | Siliceous macromolecular corrosion inhibitor composition and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5638479A (en) * | 1979-09-03 | 1981-04-13 | Nippon Steel Chem Co Ltd | Corrosion inhibitor composition |
| US4554090A (en) * | 1984-03-09 | 1985-11-19 | Jones L W | Combination corrosion/scale inhibitor |
| US4957640A (en) * | 1985-10-15 | 1990-09-18 | The Dow Chemical Company | Corrosion prevention with compositions prepared from organic fatty amines and nitrogen-containing aromatic heterocyclic compounds |
| JP2000038689A (en) * | 1998-07-24 | 2000-02-08 | Asahi Kagaku Kogyo Co Ltd | Corrosion inhibitor for acid cleaning of metal, cleaning solution composition containing the same and method for cleaning of metal using the same |
-
2010
- 2010-12-22 CN CN2010106008282A patent/CN102031528B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5638479A (en) * | 1979-09-03 | 1981-04-13 | Nippon Steel Chem Co Ltd | Corrosion inhibitor composition |
| US4554090A (en) * | 1984-03-09 | 1985-11-19 | Jones L W | Combination corrosion/scale inhibitor |
| US4957640A (en) * | 1985-10-15 | 1990-09-18 | The Dow Chemical Company | Corrosion prevention with compositions prepared from organic fatty amines and nitrogen-containing aromatic heterocyclic compounds |
| JP2000038689A (en) * | 1998-07-24 | 2000-02-08 | Asahi Kagaku Kogyo Co Ltd | Corrosion inhibitor for acid cleaning of metal, cleaning solution composition containing the same and method for cleaning of metal using the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562037A (en) * | 2013-10-24 | 2015-04-29 | 中国石油化工股份有限公司 | Siliceous macromolecular corrosion inhibitor composition and preparation method thereof |
| CN104562037B (en) * | 2013-10-24 | 2017-05-17 | 中国石油化工股份有限公司 | Siliceous macromolecular corrosion inhibitor composition and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102031528B (en) | 2012-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102146251B (en) | Anti-drag and anticorrosion coating for inner wall of natural gas/condensed liquid pipeline and preparation method thereof | |
| CN103450866B (en) | A kind of High-temperature carbon dioxide corrosion inhibitor | |
| Wang et al. | Inhibitive effects of inhibitors on the galvanic corrosion between N80 carbon steel and 13Cr stainless steel under dynamic supercritical CO2 conditions | |
| CN102061157A (en) | Gas-liquid double-phase corrosion inhibitor for gas well and preparation method thereof | |
| CN105219208B (en) | A kind of preparation method of epoxy novolac nano anticorrosive coating | |
| CN103360933B (en) | Non-bituminous water-based spraying rapid hardening rubber water-proof paint and preparation method thereof | |
| CN102965090B (en) | Corrosion inhibitor composition | |
| CN102234502B (en) | Corrosion inhibitor and preparation method | |
| CN102586782B (en) | Corrosion inhibitor and preparation and application thereof | |
| CN103820789B (en) | Compositional type carbon dioxide corrosion inhibitor | |
| CN103881684A (en) | Corrosion inhibitor used for CO2 foam flooding and preparation method thereof | |
| CN105176399A (en) | Preparation method for waterborne asphalt epoxy coating | |
| CN102051107B (en) | Light-colored thick paste type epoxy static conductive anticorrosive paint and preparation method thereof | |
| CN104449620A (en) | Oil displacing microemulsified acid system for acidizing plugging removal and preparation method of system | |
| CN102344789A (en) | Hydrogen sulfide resistant corrosion inhibitor for oil and gas well pipeline | |
| CN110952098B (en) | Imidazoline polyoxyethylene ether corrosion inhibitor for gathering and transportation oil pipeline and preparation method thereof | |
| CN110241425A (en) | A kind of high-sulfur corrosion inhibiter for oil-gas gathering and transportation process | |
| CN102031528B (en) | Corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and preparation method thereof | |
| CN105238379B (en) | A kind of long-acting corrosion inhibiter of acidification of gas well and its preparation method and application method | |
| CN108690599B (en) | Erosion acidizing fluid for clay minerals and preparation method thereof | |
| CN101824355B (en) | Machinery seal vapor phase anti-rust and preparation method thereof | |
| CN100560801C (en) | A kind of water-soluble high-temperature organic acid inhibitor and preparation method thereof and using method | |
| CN101717941B (en) | Corrosion inhibitor for oil-gas field equipment corrosion resistance and preparation method thereof | |
| CN105295880B (en) | Slow-release solid corrosion inhibitor and preparation method thereof | |
| CN101892038A (en) | High-efficiency and environmentally-friendly hydrate inhibitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20211222 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |