CN103374694A - Preparation method of corrosion-resistant composite coating for oil pipe - Google Patents
Preparation method of corrosion-resistant composite coating for oil pipe Download PDFInfo
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- CN103374694A CN103374694A CN2012101220211A CN201210122021A CN103374694A CN 103374694 A CN103374694 A CN 103374694A CN 2012101220211 A CN2012101220211 A CN 2012101220211A CN 201210122021 A CN201210122021 A CN 201210122021A CN 103374694 A CN103374694 A CN 103374694A
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- coating
- oil pipe
- corrosion
- spraying
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- 238000000576 coating method Methods 0.000 title claims abstract description 62
- 239000011248 coating agent Substances 0.000 title claims abstract description 58
- 230000007797 corrosion Effects 0.000 title claims abstract description 24
- 238000005260 corrosion Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000002131 composite material Substances 0.000 title abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 26
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005507 spraying Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000002344 surface layer Substances 0.000 claims abstract description 4
- 239000004411 aluminium Substances 0.000 claims description 21
- 150000001875 compounds Chemical class 0.000 claims description 14
- 239000011159 matrix material Substances 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 6
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 2
- LNSPFAOULBTYBI-UHFFFAOYSA-N [O].C#C Chemical group [O].C#C LNSPFAOULBTYBI-UHFFFAOYSA-N 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 abstract 1
- 239000003112 inhibitor Substances 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 24
- 230000000694 effects Effects 0.000 description 9
- 239000010935 stainless steel Substances 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 230000003245 working effect Effects 0.000 description 6
- 239000007921 spray Substances 0.000 description 4
- 238000000280 densification Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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- Coating By Spraying Or Casting (AREA)
Abstract
The invention relates to a preparation method of an oil pipe corrosion-resistant composite coating, which comprises the steps of respectively spraying a 1Cr13 coating and a pure aluminum coating on the surface of an oil pipe by adopting supersonic electric arc spraying, wherein the thickness of the 1Cr13 coating is 150 +/-50 mu m, the thickness of the pure aluminum coating is 200 +/-50 mu m, pre-oxidizing the surface of the pure aluminum coating by using oxygen acetylene flame after the spraying is finished to obtain a surface-layer aluminum oxide film, the total thickness of the coating is not more than 400 mu m, and the corrosion resistance of the composite coating is further improved by using a compact oxide film formed on the surface of the pure aluminum; the oil pipe treated by the method has strong corrosion resistance, long service life, no need of technical measures such as adding corrosion inhibitor in the later period and the like, low cost and high economic benefit.
Description
Technical field
The present invention relates to a kind of preparation method of corrosion-resistant compound coating, be specifically related to the corrosion-resistant compound coating preparation of oil pipe, belong to the corrosion-resistant finishes preparing technical field.
Background technology
Service Environment is abominable in actual applications for used oil pipe when oil production and transportation, contains sour gas H in the gas-liquid mixture of oil pipe outside
2S, CO
2Deng, these gases are water-soluble so that pH value is lower, add high Cl
-Isoionic existence is so that the etch states such as pitting corrosion easily occur in oil pipe surface, thereby affects the use safety of oil pipe.
In order to ensure production safety, prolong the work-ing life of oil pipe, adopting non-corrosive metal is optimal selection.For more abominable service condition, need to adopt advanced stainless steel, but expensive, be unfavorable for extensive use.At present, domestic general employing carbon steel is as the oil transport pipeline, and this just need to process as far as possible mitigate corrosion to pipe surface.The protection against corrosion of stainless steel coating method is sprayed paint, sprayed to general the employing, but effect is relatively poor, and work-ing life is shorter.And adopt the technique of spraying compound coating, and the expensive high-class stainless steel of usage comparison mostly, aluminium alloy etc., cost is higher.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of compound coating for oil pipe.This compound coating prepares simple, and cost is lower, and preservative effect is remarkable, has prolonged the work-ing life of oil pipe.
Technical thought of the present invention: from low cost, efficient corrosion resisting sets out, and does not change the material of oil pipe, adopt Supersonic Arc Spraying Technique, do not affect under the prerequisite of mechanical property of material and improve solidity to corrosion, prolong the work-ing life of oil pipe, save cost and increase economic efficiency.
According to electrochemical principle, the coating of spraying is divided into cathode and anode coating.Cathode refers to that the electropotential of the coating that sprays is more negative than the electropotential of matrix, and coating is corroded first as anode when corrosion, thereby matrix is protected.Consider the use range of cathode, compound coating reasonable in design.The first layer spraying 1Cr13 stainless steel coating, 1Cr13 stainless steel cost is lower, and electropotential is more negative than carbon steel.Because in the oil pipe use, the oil pipe surface local damage can occur unavoidably, thereby form the situation of " large negative electrode primary anode " at damage location, local corrosion speed is improved greatly.Although the fine aluminium activity is higher, but can form again the extremely low pellumina of activity of one deck densification after the spraying on its surface through flame preoxidation, and the electropotential of aluminium is more negative than stainless steel, can preferentially corrode, so spray one deck fine aluminium coating, then can greatly improve solidity to corrosion at the pellumina of the most surperficial formation one deck densification again through preoxidation at the 1Cr13 bottom.
The technical solution used in the present invention is: process oil pipe later and be comprised of oil pipe matrix, 1Cr13 coating, fine aluminium coating, pellumina four parts.It is characterized in that bottom is the 1Cr13 coating, the middle layer is the fine aluminium coating, and surface layer is pellumina.The 1Cr13 coating spraying thickness of bottom is 150 ± 50 μ m, and middle layer fine aluminium coating spraying thickness is 200 ± 50 μ m, and spraying is carried out preoxidation with oxyacetylene torch to the fine aluminium coatingsurface, the surface layer pellumina of acquisition after finishing.Total coating thickness≤400 μ m.The dense oxidation film that utilizes surface of pure aluminum to form improves solidity to corrosion, and can form the corrosion cell structure of " the large little negative electrode of anode " at damage location, prolongs the work-ing life of oil pipe.
The effect of this patent:
(1) anticorrosion ability is remarkable, and three safety effects of compound coating are so that greatly prolong the work-ing life of oil pipe, and particularly the formed dense oxidation film activity of fine aluminium coatingsurface is low, so that solidity to corrosion improves greatly, can bring considerable economic benefit.
(2) cost is lower, and 1Cr13 stainless steel and fine aluminium price that spraying is adopted are all lower.
(3) equipment is simple, and is easy to operate, and sedimentation effect is high.Adopt Supersonic Arc Spraying Technique, operation is simple in spraying, and the coating sedimentation effect is high.
(4) coating and matrix, compound coating interlayer bonding force are strong, greater than 25MPa.
(5) coating prepared is fine and close, and porosity is low, and 1Cr 13 coating porosities are average 2.28%, fine aluminium coating porosity average 1.64%.
(6) once construction can be finished anticorrosionly, need not the measures such as follow-up interpolation inhibiter.Simplify the site technique flow process, reduce cost.
Description of drawings
Fig. 1 is the compound coating semi-section structural representation of present method preparation.
Among Fig. 1,1. oil pipe matrix, 2.1Cr13 coating, 3. fine aluminium coating, 4. oxide film.
Fig. 2 is the SEM image that uses the compound coating section of Ultrasonic Arc Sprayed preparation.
Embodiment
Consult accompanying drawing 1, Fig. 2.The corrosion-resistant compound coating of this preparation method oil pipe is comprised of oil pipe matrix 1,1Cr13 coating 2, fine aluminium coating 3, oxide film 4.The 1Cr13 coat-thickness is 150 ± 50 μ m, and the fine aluminium coat-thickness is 200 ± 50 μ m, and total coating thickness is no more than 400 μ m.Technological process is as follows:
1. the oil pipe surface is processed.Comprise the wash oil tube-surface, except impurity such as degreasings, then sandblasting is carried out on the oil pipe surface.
2. carry out the spraying of 1Cr13 coating.Adopt Ultrasonic Arc Sprayed technique in oil pipe matrix 1 surface spraying 1Cr13 coating.Spray parameters such as table 1.
Table 1
3. carry out the spraying of fine aluminium coating.After having sprayed 1Cr 13 coatings, spraying fine aluminium coating.Spray parameters such as table 2.
Table 2
4. spraying is carried out preoxidation with the oxyacetylene torch effects on surface after finishing, and forms the oxide film of one deck densification on the top layer.
Claims (3)
1. a preparation method who is used for the corrosion-resistant compound coating of oil pipe processes oil pipe later and is comprised of oil pipe matrix, 1Cr13 coating, fine aluminium coating, pellumina four parts; It is characterized in that: bottom is the 1Cr13 coating, and the middle layer is the fine aluminium coating, and surface layer is pellumina; The 1Cr13 coating spraying thickness of bottom is 150 ± 50 μ m, and middle layer fine aluminium coating spraying thickness is 200 ± 50 μ m, and spraying is carried out preoxidation to the fine aluminium coatingsurface after finishing, and forms pellumina, total coating thickness≤400 μ m.
2. the preparation method of the corrosion-resistant compound coating for oil pipe according to claim 1 is characterized in that: adopt Ultrasonic Arc Sprayed 1Cr13 coating, fine aluminium coating.
3. the preparation method of the corrosion-resistant compound coating for oil pipe according to claim 1 is characterized in that: use oxyacetylene torch to the preoxidation of fine aluminium coatingsurface after spraying finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101220211A CN103374694A (en) | 2012-04-24 | 2012-04-24 | Preparation method of corrosion-resistant composite coating for oil pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101220211A CN103374694A (en) | 2012-04-24 | 2012-04-24 | Preparation method of corrosion-resistant composite coating for oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103374694A true CN103374694A (en) | 2013-10-30 |
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|---|---|---|---|
| CN2012101220211A Pending CN103374694A (en) | 2012-04-24 | 2012-04-24 | Preparation method of corrosion-resistant composite coating for oil pipe |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668344A (en) * | 2013-12-16 | 2014-03-26 | 西南交通大学 | Surface treatment method for thermally-sprayed inorganic coating |
| CN104018108A (en) * | 2014-06-26 | 2014-09-03 | 常州大学 | Steel surface modification treatment method for ocean platform |
| CN106399844A (en) * | 2016-12-14 | 2017-02-15 | 苏州富艾姆工业设备有限公司 | Processing technology of anticorrosive piston rod |
| CN106521344A (en) * | 2016-12-14 | 2017-03-22 | 苏州富艾姆工业设备有限公司 | Machining process of wear resisting piston rod for valve |
| CN106512917A (en) * | 2016-12-15 | 2017-03-22 | 苏州富艾姆工业设备有限公司 | Particle filler production process |
| CN106637986A (en) * | 2016-12-15 | 2017-05-10 | 苏州富艾姆工业设备有限公司 | Production process of composite sealing plate |
| CN106756585A (en) * | 2016-12-14 | 2017-05-31 | 苏州富艾姆工业设备有限公司 | A kind of production technology of automobile engine to exhaust joint |
| CN106782882A (en) * | 2016-12-15 | 2017-05-31 | 苏州陈恒织造有限公司 | A kind of preparation method of corrosion proof cable |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01156496A (en) * | 1987-12-11 | 1989-06-20 | Shinku Zairyo Kk | Formation of corrosion-resistant coating film on stainless steel member |
| CN201187256Y (en) * | 2008-04-30 | 2009-01-28 | 中国石油天然气股份有限公司 | Gas well oil pipe with outer wall subjected to bimetal spraying corrosion prevention |
| CN101876327A (en) * | 2009-03-06 | 2010-11-03 | 通用电气公司 | Anti-erosion and corrosion resistant turbine compressor airfoil and manufacture method thereof |
-
2012
- 2012-04-24 CN CN2012101220211A patent/CN103374694A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01156496A (en) * | 1987-12-11 | 1989-06-20 | Shinku Zairyo Kk | Formation of corrosion-resistant coating film on stainless steel member |
| CN201187256Y (en) * | 2008-04-30 | 2009-01-28 | 中国石油天然气股份有限公司 | Gas well oil pipe with outer wall subjected to bimetal spraying corrosion prevention |
| CN101876327A (en) * | 2009-03-06 | 2010-11-03 | 通用电气公司 | Anti-erosion and corrosion resistant turbine compressor airfoil and manufacture method thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668344A (en) * | 2013-12-16 | 2014-03-26 | 西南交通大学 | Surface treatment method for thermally-sprayed inorganic coating |
| CN103668344B (en) * | 2013-12-16 | 2016-07-20 | 西南交通大学 | Surface treatment method for thermal spraying inorganic coating |
| CN104018108A (en) * | 2014-06-26 | 2014-09-03 | 常州大学 | Steel surface modification treatment method for ocean platform |
| CN104018108B (en) * | 2014-06-26 | 2016-06-08 | 常州大学 | A kind of method of offshore platform steel surface modification treatment |
| CN106399844A (en) * | 2016-12-14 | 2017-02-15 | 苏州富艾姆工业设备有限公司 | Processing technology of anticorrosive piston rod |
| CN106521344A (en) * | 2016-12-14 | 2017-03-22 | 苏州富艾姆工业设备有限公司 | Machining process of wear resisting piston rod for valve |
| CN106756585A (en) * | 2016-12-14 | 2017-05-31 | 苏州富艾姆工业设备有限公司 | A kind of production technology of automobile engine to exhaust joint |
| CN106512917A (en) * | 2016-12-15 | 2017-03-22 | 苏州富艾姆工业设备有限公司 | Particle filler production process |
| CN106637986A (en) * | 2016-12-15 | 2017-05-10 | 苏州富艾姆工业设备有限公司 | Production process of composite sealing plate |
| CN106782882A (en) * | 2016-12-15 | 2017-05-31 | 苏州陈恒织造有限公司 | A kind of preparation method of corrosion proof cable |
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Application publication date: 20131030 |