CN101235247A - Natural gas pipeline inner wall anticorrosion paint formulation - Google Patents
Natural gas pipeline inner wall anticorrosion paint formulation Download PDFInfo
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- CN101235247A CN101235247A CNA2008100448915A CN200810044891A CN101235247A CN 101235247 A CN101235247 A CN 101235247A CN A2008100448915 A CNA2008100448915 A CN A2008100448915A CN 200810044891 A CN200810044891 A CN 200810044891A CN 101235247 A CN101235247 A CN 101235247A
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- natural gas
- anticorrosion paint
- paint formulation
- polyurethane resin
- gas pipeline
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Abstract
An anticorrosion paint formulation of inner walls of gas pipelines relates to the preparation of anticorrosion paint of inner walls of pipelines, which comprises A constituent which is formed by epoxy polyurethane resin and basic zinc chromate and twelve ingredients and B constituent which is formed by two ingredients such as curing agent and the like, solves the problems of high anticorrosion alloy cost, unsuitable glass steel on high temperature high pressure pipeline, compact two components coating construction and no repairing seams of pipelines. The invention provides an anticorrosion paint formulation which is suitable to the inner walls of gas trunk pipeline and branch pipeline under the conditions of high-sulphur and carbon dioxide through the ways of material optimization and property recombination, epoxy polyurethane resin which is adopted combines the advantages of the hardness of epoxy resin and the elasticity of polyurethane resin, the curing time does not surpass 30 seconds under the constant temperature through matching with curing agent, thereby largely increasing the anticorrosion ability of the inner walls of common carbon steel pipes.
Description
Technical field: a kind of natural gas pipeline inner wall anticorrosion paint formulation, be used for the rotproofing of natural gas conveying pipeline inner wall, relate to a kind of collocation method of natural gas conveying pipeline inner wall corrosion coating.
Background technology: the development natural gas energy resource is a current important energy source policy of China, industry and people's lives to the demand of Sweet natural gas also in continuous expansion, but, the gasser that present China has exploited or verified belongs to the gas well of high sulfur-bearing and carbonic acid gas more, these gases need through piping Sweet natural gas to be transported to natural gas conditioning factory earlier and carry out removing of hydrogen sulfide and carbonic acid gas after exploitation is come out in well, then, the Sweet natural gas that reaches transfer criteria after piping will purify is delivered to the place that needs use; In Sweet natural gas, exsiccant hydrogen sulfide and carbonic acid gas are to not corrosion of pipeline, Sweet natural gas through purifying treatment, though reached transfer criteria, but existence because of a large amount of water vapors in the Sweet natural gas, in pipe conveying procedure, be condensed in the inner-walls of duct surface along with the reduction of gas temperature, become acid after being dissolved into hydrogen sulfide and carbonic acid gas, cause Corrosion of Pipeline, so the pipeline of these conveyings still needs to carry out rotproofing before use, otherwise, the transport pipe of steel will be in the process of using very the piece rust that is corroded wear, and then cause the leakage and the accident of Sweet natural gas; Aspect the rotproofing of natural-gas transfer pipeline, the anticorrosion tubing of employing such as non-corrosive metal and glass reinforced plastic all have good antiseptic power at present, but its high cost has limited application, and fiber reinforced plastic pipe also is not suitable for the High Temperature High Pressure pipeline section in addition; Add the corrosion that inhibiter then can slow down steel pipe to a certain extent, but can not prevent corrosion fully; Pipeline anti-corrosive paint mostly is dual-component coating at present, though good as the epoxide powder coating preservative effect, need carry out hot setting during owing to its coating construction and handle, need special technology and equipment, particularly can't carry out coating, and cause huge potential safety hazard the pipe welding seam place; Other two component epoxy and polyurethane coating, normal temperature following set time is long, not only helps site operation, and its raw material mostly is poisonous even hypertoxic composition, has all caused disadvantageous effect for environmental protection and construction safety.
Summary of the invention: the objective of the invention is in order to solve the existing problem of impregnating material that prior art produces, adopt material preferably with the mode of performance reorganization, provide a kind of gas trunklines transport pipe that promptly is applicable to also to can be used for the prescription of the natural gas pipeline inner wall anticorrosion paint of branch pipeline.
Prescription of the present invention is: prescription of the present invention comprises A component and B component, it is characterized in that:
The A component is made of 12 kinds of compositions, and they are:
Epoxy polyurethane resin 65-80%; Alkalescence zinc chromate 5-10%;
Tetrafluoroethylene 2-4%; Ultrafine quartz powder 2-4%;
Superhard aluminum oxide 1-3%; Increase sliding anti-water smoke wax powder 3-5%;
Graphite 2-3%; Defoamer 0.1-0.2%;
Flow agent 0.2-0.4%; Thickening material 0.2-0.4%;
Coupling agent 1.5-2%; Film coalescence aid 3-4%;
The B component is made of two kinds of compositions, and they are:
Solidifying agent 80-90%; Curing catalyst 10-20%;
Ultrafine quartz powder and superhard aluminum oxide in above-mentioned prescription, have been added to strengthen the hardness and the wear resisting property of coating, wherein superhard aluminum oxide is the alpha-crystal form aluminum oxide, the purity mass percent is greater than 95%, granularity is the 10-30 micron, alpha-crystal form is the hardest a kind of crystal formation of aluminum oxide, and its granularity is at the 10-30 micron;
Described epoxy polyurethane resin is a no-solvent type, and solidifying agent is the low toxicity type;
Described A group with the ratio of B group is: A: B=3～4: 1, construction temperature are 20～30 ℃, set time 15s～30s;
Described ultrafine quartz powder is 1250 orders;
Advantage of the present invention with beneficial effect is: compare with the inner-walls of duct epoxy coating of routine, in high sulfur-bearing and carbonic acid gas natural gas line, because contained amido functional group is strong electron-donating group, so the antiacid erosion and the sulfidation corrosion ability of epoxy polyurethane coating are stronger, epoxy polyurethane resin of the present invention combines the hardness of Resins, epoxy and the elasticity advantage of urethane resin, and realized the curing under the normal temperature, when being used with the solidifying agent product, normal temperature is no more than 30 seconds following set time, greatly facilitate the construction of pipeline coatings, in addition, because the epoxy polyurethane resin that adopts is a no-solvent type, solidifying agent also is the low toxicity type, greatly improved the environmental-protecting performance of product construction, and its cost is far below adopting the corrosion resisting alloy pipeline, can improve the inwall corrosion resistance of plain carbon stool pipeline greatly, the alkaline zinc chromate that is added in filling a prescription in addition, tetrafluoroethylene, ultrafine quartz powder and graphite all have stronger antiacid erosion and sulfidation corrosion performance, are specially adapted to high sulfur-bearing and carbon dioxide environment.
Embodiment: prescription of the present invention comprises A component and B component, and wherein the A component comprises:
Epoxy polyurethane resin 65-80%; Alkalescence zinc chromate 5-10%;
Tetrafluoroethylene 2-4%; Ultrafine quartz powder 2-4%;
Superhard aluminum oxide 1-3%; Increase sliding anti-water smoke wax powder 3-5%;
Graphite 2-3%; Defoamer 0.1-0.2%;
Flow agent 0.2-0.4%; Thickening material 0.2-0.4%;
Coupling agent 1.5-2%; Film coalescence aid 3-4%;
The B component comprises:
Solidifying agent 80-90%; Curing catalyst 10-20%;
Because natural gas line, particularly branch pipeline adopts high atmospheric pressure and high flow capacity to carry, therefore hardness and wear resisting property that ultrafine quartz powder that adds in filling a prescription and superhard aluminum oxide can strengthen coating, wherein superhard alumina series alpha-crystal form aluminum oxide, the purity mass percent is greater than 95%, granularity is the 10-30 micron, alpha-crystal form is the hardest a kind of crystal formation of aluminum oxide, its granularity is wear resistance when the 10-30 micron, transmittance and dispersing property reach optimum balance, the graphite that adds in the prescription has certain electroconductibility, in the line sections of no galvanic protection, can prevent and eliminate the static on the inner-walls of duct; Adopted novel surface to increase sliding anti-water smoke wax powder in the prescription, not only by increasing the slickness of coatingsurface, reduce the loss of pipe-line transportation pressure, have good energy-saving effect, can also reduce surface tension by forming the hydrophobic and oleophobic structure in top layer with water, prevent the aggegation of steam at coatingsurface, make the moisture content of condensation be not easy to be deposited on pipe surface, thereby played the control corrosion, particularly prevent the important booster action of spot corrosion; The product compressive strength is applicable to the high-pressure delivery environment of natural gas line up to 100MPa in addition, in the acid resistance experiment, has increased by 5% HNO specially
3, soak the H of 96h and 10%
2SO
4, soaking the 96h condition, product all successfully passes through, and shows that coating has good resistance to acid attack performance, has great importance at the high sulfur-bearing and the carbonic acid gas natural-gas transfer pipeline that with acid etching are main forms of corrosion;
Below with different formula rates, different construction temperature with provide three embodiment different set times:
Embodiment 1
Getting A group and B respectively, to form part as follows:
The A component:
Epoxy polyurethane resin 65%; Alkalescence zinc chromate 10%; Tetrafluoroethylene 4%;
Ultrafine quartz powder 4%; Superhard aluminum oxide 3%; Increase sliding anti-water smoke wax powder 5%;
Graphite 3%; Defoamer 0.2%; Flow agent 0.4%;
Thickening material 0.4%; Coupling agent 2%; Film coalescence aid 3%;
The B component:
Solidifying agent 80%; Curing catalyst 20%;
A group: B organizes=4: 1 (W/W), and construction temperature is 22 ℃, set time 28s; After assembly finishes, the protective system for preparing is applied in the DN150 Sweet natural gas high-pressure delivery pipeline DN150 Sweet natural gas pressure piping, transfer pressure 17MPa, H
2S dividing potential drop 3MPa, CO
2Dividing potential drop 2MPa, pipe flow speed 6ms
-1, mouth of pipe vapour content 20% (V/V); After using in 12 months, do not detect disbonding, perforation, foam and occur the inner wall corrosion point;
Embodiment 2
The composition of getting A group and B group respectively is as follows:
The A component:
Epoxy polyurethane resin 70%; Alkalescence zinc chromate 8%; Tetrafluoroethylene 3%;
Ultrafine quartz powder 3%; Superhard aluminum oxide 2%; Increase sliding anti-water smoke wax powder 5%;
Graphite 3%; Defoamer 0.1%; Flow agent 0.2%;
Thickening material 0.2%; Coupling agent 2%; Film coalescence aid 3.5%;
The B component
Solidifying agent 85%; Curing catalyst 15%;
A group: B organizes=3: 1 (W/W), and construction temperature is 23 ℃, set time 19s; After assembly finishes, the protective system for preparing is applied to press transport pipe in the DN250 Sweet natural gas transfer pressure 9MPa, H
2S dividing potential drop 2.8MPa, CO
2Dividing potential drop 0.6MPa, pipe flow speed 3.8ms
-1, mouth of pipe vapour content 11% (V/V); After using in 12 months, do not detect disbonding, perforation, foam and occur the inner wall corrosion point.
Embodiment 3
The composition of getting A group and B group respectively is as follows:
The A component:
Epoxy polyurethane resin 80%; Alkalescence zinc chromate 5%; Tetrafluoroethylene 1%;
Ultrafine quartz powder 2%; Superhard aluminum oxide 1%; Increase sliding anti-water smoke wax powder 3%;
Graphite 2%; Defoamer 0.1%; Flow agent 0.2%;
Thickening material 0.2%; Coupling agent 1.5%; Film coalescence aid 4%;
The B component
Solidifying agent 90%; Curing catalyst 10%;
The A group: B organizes=3: 1 (W/W), and construction temperature is 29 ℃, and set time, 15s after assembly finishes, was applied to DN325 Sweet natural gas low-pressure delivery pipeline, transfer pressure 2.6MPa, H with the protective system for preparing
2S dividing potential drop 0.4MPa, CO
2Dividing potential drop 0.2MPa, pipe flow speed 2.5ms
-1, mouth of pipe vapour content 3% (V/V) after using in 12 months, does not detect disbonding, perforation, foams and occurs the inner wall corrosion point.
Claims (4)
1, a kind of natural gas pipeline inner wall anticorrosion paint formulation is characterized in that: prescription of the present invention comprises A component and B component:
The A component is made up of following material:
Epoxy polyurethane resin 65-80%; Alkalescence zinc chromate 5-10%;
Tetrafluoroethylene 2-4%; Ultrafine quartz powder 2-4%;
Superhard aluminum oxide 1-3%; Increase sliding anti-water smoke wax powder 3-5%;
Graphite 2-3%; Defoamer 0.1-0.2%;
Flow agent 0.2-0.4%; Thickening material 0.2-0.4%;
Coupling agent 1.5-2%; Film coalescence aid 3-4%;
The B component is made up of following material:
Solidifying agent 80-90%; Curing catalyst 10-20%.
2, natural gas pipeline inner wall anticorrosion paint formulation according to claim 1 is characterized in that: described superhard aluminum oxide is the alpha-crystal form aluminum oxide, and the purity mass percent is greater than 95%, and granularity is the 10-30 micron.
3, natural gas pipeline inner wall anticorrosion paint formulation according to claim 1 is characterized in that: described epoxy polyurethane resin is a no-solvent type, and solidifying agent is the low toxicity type.
4, natural gas pipeline inner wall anticorrosion paint formulation according to claim 1 is characterized in that: described A group with the ratio of B group is: A: B=3～4: 1, construction temperature are 20～30 ℃, and be 15s～30s set time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100448915A CN100572475C (en) | 2008-03-05 | 2008-03-05 | Natural gas pipeline inner wall anticorrosion paint formulation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100448915A CN100572475C (en) | 2008-03-05 | 2008-03-05 | Natural gas pipeline inner wall anticorrosion paint formulation |
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| Publication Number | Publication Date |
|---|---|
| CN101235247A true CN101235247A (en) | 2008-08-06 |
| CN100572475C CN100572475C (en) | 2009-12-23 |
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|---|---|---|---|
| CNB2008100448915A Active CN100572475C (en) | 2008-03-05 | 2008-03-05 | Natural gas pipeline inner wall anticorrosion paint formulation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011069970A1 (en) * | 2009-12-09 | 2011-06-16 | Bayer Materialscience Ag | Polyisocyanurate-coated parts and the use thereof in offshore applications |
| CN102168272A (en) * | 2011-03-22 | 2011-08-31 | 中国石油集团工程设计有限责任公司 | Corrosion inhibitor for sour oil and gas fields |
| CN103224721A (en) * | 2013-03-29 | 2013-07-31 | 王德全 | Teflon resin anticorrosive paint and preparation method thereof |
| CN103254723A (en) * | 2013-05-16 | 2013-08-21 | 华东理工大学 | Solvent-free type natural gas pipeline drag-reduction internal paint and preparation method thereof |
| CN104152026A (en) * | 2014-07-25 | 2014-11-19 | 上海蓝欧化工科技有限公司 | Wear-resistant paint |
| CN104231865A (en) * | 2014-10-16 | 2014-12-24 | 烟台中泰管业工程有限公司 | Heavy-duty anti-corrosion coating and painting method thereof |
| CN104263217A (en) * | 2014-09-02 | 2015-01-07 | 王广波 | Water-based black chromium-free anticorrosive paint |
| CN104479651A (en) * | 2014-12-02 | 2015-04-01 | 中国石油天然气股份有限公司 | Waterproof material and method for mudstone well wall |
| CN106609106A (en) * | 2015-10-26 | 2017-05-03 | 天津市新丽华色材有限责任公司 | Waterborne glass paint |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4657947A (en) * | 1984-04-24 | 1987-04-14 | Asahi Denka Kogyo K.K. | Anticorrosive coating composition containing polyol resin, isocyanate hardener and diluent |
-
2008
- 2008-03-05 CN CNB2008100448915A patent/CN100572475C/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011069970A1 (en) * | 2009-12-09 | 2011-06-16 | Bayer Materialscience Ag | Polyisocyanurate-coated parts and the use thereof in offshore applications |
| CN102168272A (en) * | 2011-03-22 | 2011-08-31 | 中国石油集团工程设计有限责任公司 | Corrosion inhibitor for sour oil and gas fields |
| CN102168272B (en) * | 2011-03-22 | 2012-12-26 | 中国石油集团工程设计有限责任公司 | Corrosion inhibitor for sour oil and gas fields |
| CN103224721A (en) * | 2013-03-29 | 2013-07-31 | 王德全 | Teflon resin anticorrosive paint and preparation method thereof |
| CN103224721B (en) * | 2013-03-29 | 2016-05-11 | 王德全 | A kind of polyflon anticorrosive paint and preparation method thereof |
| CN103254723B (en) * | 2013-05-16 | 2015-08-19 | 华东理工大学 | A kind of no-solvent type natural gas line drag reduction inside courtyard and preparation method thereof |
| CN103254723A (en) * | 2013-05-16 | 2013-08-21 | 华东理工大学 | Solvent-free type natural gas pipeline drag-reduction internal paint and preparation method thereof |
| CN104152026A (en) * | 2014-07-25 | 2014-11-19 | 上海蓝欧化工科技有限公司 | Wear-resistant paint |
| CN104263217A (en) * | 2014-09-02 | 2015-01-07 | 王广波 | Water-based black chromium-free anticorrosive paint |
| CN104231865A (en) * | 2014-10-16 | 2014-12-24 | 烟台中泰管业工程有限公司 | Heavy-duty anti-corrosion coating and painting method thereof |
| CN104231865B (en) * | 2014-10-16 | 2016-06-08 | 烟台中泰管业工程有限公司 | A kind of anticorrosive paint and heavy antisepsis brushing method |
| CN104479651A (en) * | 2014-12-02 | 2015-04-01 | 中国石油天然气股份有限公司 | Waterproof material and method for mudstone well wall |
| CN104479651B (en) * | 2014-12-02 | 2017-05-10 | 中国石油天然气股份有限公司 | Waterproof material and method for mudstone well wall |
| CN106609106A (en) * | 2015-10-26 | 2017-05-03 | 天津市新丽华色材有限责任公司 | Waterborne glass paint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100572475C (en) | 2009-12-23 |
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Effective date of registration: 20180116 Address after: 610041 Chengdu high tech Zone, Sichuan province sublimation Road No. 6 Patentee after: China Petroleum Engineering Construction Co Ltd Address before: 100085 Beijing, Haidian District on the road, No. 8 Patentee before: Engineering Design Co., Ltd., China Petroleum Group |
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Effective date of registration: 20210224 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Address before: No. 6, Sichuan hi tech Zone, sublime Road, Chengdu, Sichuan Patentee before: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. |