CN105135153A - Method for inhibiting corrosion on inner wall of metal conveying pipeline - Google Patents
Method for inhibiting corrosion on inner wall of metal conveying pipeline Download PDFInfo
- Publication number
- CN105135153A CN105135153A CN201510631280.0A CN201510631280A CN105135153A CN 105135153 A CN105135153 A CN 105135153A CN 201510631280 A CN201510631280 A CN 201510631280A CN 105135153 A CN105135153 A CN 105135153A
- Authority
- CN
- China
- Prior art keywords
- charge
- trapping device
- pipeline
- metal
- delivery tubes
- 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
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 33
- 239000002184 metal Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000007797 corrosion Effects 0.000 title abstract description 19
- 238000005260 corrosion Methods 0.000 title abstract description 19
- 230000002401 inhibitory effect Effects 0.000 title abstract 3
- 239000000463 material Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000006056 electrooxidation reaction Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000003518 caustics Substances 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005264 electron capture Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Prevention Of Electric Corrosion (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention provides a method for inhibiting corrosion on the inner wall of a metal conveying pipeline. According to the method, a plurality of groups of electron capturers made of a metal material are perpendicularly arranged on the inner wall of the metal conveying pipeline, and utilized for adsorbing charged particles in a fluid, so that electrochemical corrosion of the metal conveying pipeline can be reduced. The method has the advantages of small investment, easy implementation and the like; through adoption of the method, the corrosion depth of the metal conveying pipeline can be reduced by about 60%, and the effect in inhibiting corrosion of the metal conveying pipeline is remarkable.
Description
Technical field
This invention belongs to Metal surface anticorrosion technology field, is specifically related to a kind of method suppressing metal delivery tubes road inner wall corrosion
Background technique
Metal delivery tubes road is a kind of instrument for long distance delivery liquids and gases, is commonly used to transfer oil, rock gas, coal gas and chemistry and chemical product etc.Due to use the mode of movement of metallic conduit have freight volume large, continuously, fast, economic, safety, reliable, steadily and take up an area less, the series of advantages such as expense is low, therefore, the important means of transfer oil, rock gas, coal gas and chemistry and chemical product etc. has been become at present.In addition, public supply mains and gas supply also all adopt the mode of movement of metallic conduit.
Because metal delivery tubes road is embedded in underground or seabed more, therefore, corrosive pipeline is the principal element affecting metallic conduit working life.Therefore, prevent and reduce Metal pipeline corrosion be in pipework and pipeline using process must the problem of abundant thinking.
Pipeline corrosion protection measure described in metal current mostly occurs before the use, and at metallic conduit surface coating rust proof paint etc., but once after coming into operation, the Anticorrosion of metallic conduit internal layer almost can be used without any measure.The object of this invention is to fill up such technological gap, even if make also certain measure to be taked to carry out anticorrosion to the inwall of its pipeline according to electrochemical principle in metallic conduit using process.
Summary of the invention
By corrosion mechanism, corrosive pipeline can be divided into chemical corrosion and electrochemical corrosion two kinds.Wherein, electrochemical corrosion refers to the medium generation electrochemical reaction of metal surface and ionic conduction and metal surface is produced destroy, and this is considered to the principal element causing Pipeline damage.
In electrochemical reaction process, Fe atom loses electronics and transfers in the middle of medium with ionic condition, and this process is referred to as anode oxidation process; Material (also known as battery depolarizer) in medium absorbs the electronics from anode, is called cathode reduction process.Above-mentioned two processes generally represent by formula below:
Fe-2e-→Fe
2+(1)
O
2+2H
2O+4e-→4OH
-(2)
Overall reaction is:
2Fe+O
2+2H
2O＝2Fe(OH)
2(3)
From formula above, be conducive to the factor that Fe atom loses electronics, the generation of Fe oxidation reaction will be promoted, then promote the carrying out of corrosive pipeline.Otherwise, if can effectively suppress Fe atom to lose electronics, the rate of corrosion of pipeline so just can be reduced.
According to tribology principle, metal delivery tubes road inwall and fed sheet of a media due to friction to each other can be mutually charged.Because fed sheet of a media is insulation, constantly flow, therefore, fricative positive and negative charge can be separated from each other in addition.The positive charge passing through type (2) staying pipeline wall reacts with the water in fed sheet of a media or environment and oxygen, thus makes pipeline rust; Entering negative charge in fed sheet of a media with media flow is present in medium.
The characteristic distributions of electric charge and positive and negative charge is produced according to the pipe friction described in above-mentioned principle, the present invention by arranging charge-trapping device in pipeline, and utilize conductive material to make it the method be connected with metal pipe internal wall face, make the negative charge be present in flowing medium be back to inner-walls of duct and neutralize the positive charge being trapped in tube wall place, thus can effectively suppress Fe atom to lose electronics, reach the object reducing corrosive pipeline speed.
Be included in pipeline according to the method for suppression metal delivery tubes road of the present invention corrosion and charge-trapping device is set, wherein,
A: the material making charge-trapping device can select betatopic ability higher than the conductive material in metal delivery tubes road, and metallic material or nonmetallic material can be comprised, as the one in steel, aluminium, copper, molybdenum, tungsten, platinum or carbon element, also can be grouped together by the multiple material in aforementioned and use;
B: the shape of charge-trapping device can be bar-shaped, ring-type, netted and irregularly shaped in one or more combinations, in order to make the life-span of charge-trapping device consistent with pipeline and ensure the passing ability of fluid in pipeline, the maximum cross-section area of charge-trapping device can be the long-pending 30%-90% of conveyance conduit wall cross-section, or can be the 3%-10% of pipeline by area;
C: charge-trapping device can face media flow direction, install in the mode of Maximum Contact area with flowing medium, and be at least arranged in the entrance in metal delivery tubes road, middle part and outlet port.Charge-trapping device has at least more than a place or a place to be connected with inner-walls of duct face, namely can be fixed on inner-walls of duct by metal.
Effect of the present invention is as follows:
(1) the rate of corrosion Be very effective in metal delivery tubes road is reduced: by arranging charge-trapping device in metal delivery tubes road, and connect with inner-walls of duct, effectively inhibit Fe atom to lose electronics, and then reduce the rate of corrosion of pipeline, improve pipeline working life more than 60%;
(2) suppress metal delivery tubes road caustic solution simple and convenient: only need charge-trapping device be set in pipeline and makes it to be connected with inner-walls of duct, do not need additional power source can suppress the speed of pipeline generation electrochemical reaction, therefore, suppress conveyance conduit caustic solution simple and convenient, and without the need to additional cost;
(3) electron capture organ is consistent with the steel pipe life-span, installs when only needing to mat formation pipeline, without the need to later stage maintenance.
Accompanying drawing explanation
By combining the following description of the embodiment of accompanying drawing below, other aspects and advantages of the present invention will be more obvious, in the accompanying drawings,
Fig. 1 is depicted as the schematic diagram of netted charge-trapping device according to exemplary embodiment of the present invention and mounting point thereof.
Embodiment
With petroleum pipe steel X60 for objective for implementation, as shown in Figure 1, wherein, reference character 1 is charge-trapping device to implementation process, and reference character 2 is the tube wall in metal delivery tubes road.
The internal diameter in metal delivery tubes road and external diameter are respectively Φ 90mm and Φ 100mm, are connected with oil storage tank and recycle pump.Wherein, be 1000mm for investigating the length of the part of corrosion, and be embedded in the depths of underground 500mm.According to there being five places to be provided with the netted charge-trapping device 1 be compiled into by zinc alloy wire in the metal delivery tubes road that embodiments of the invention use, and be connected with tube wall 2.The mesh aperture of charge-trapping device is 50 orders (300 μm).
200kg crude oil is loaded in oil storage tank, keeps that pipeline environment temperature is 25 DEG C, humidity is 90%, utilize recycle pump by crude oil with the continuous-flow 4800 hours in pipeline of the flow of 0.8l/s.Then from underground removing conduit, cut off from centre after cleaning up, the corrosion depth of measuring channel inside and outside wall.
Result shows, when pipe interior arranges charge-trapping device, the inside and outside corrosion depth of pipeline is respectively 0.032mm and 0.061mm, and when not arranging charge-trapping device, the inside and outside corrosion depth of pipeline is respectively 0.079mm and 0.152mm.
Visible, adopt charge-trapping device of the present invention and setting method thereof, corrosion depth of pipeline can be made to reduce about 60%, suppress pipeline corrosive effect remarkable.
Claims (3)
1. the method suppressing metal delivery tubes road to corrode, is characterized in that, described method is included in inside, metal delivery tubes road and arranges charge-trapping device, wherein:
A: charge-trapping device is made up of higher than the metal in metal delivery tubes road and/or nonmetallic material betatopic ability;
B: charge-trapping device be bar-shaped, ring-type, netted or irregularly shaped in one or more combinations;
C: charge-trapping device is arranged in the face of media flow direction, and there is the Maximum Contact area contacted with flowing medium, wherein, charge-trapping device is at least arranged in the entrance of pipeline, middle part and outlet port, and charge-trapping utensil has the part be directly or indirectly connected with inner-walls of duct face.
2. method according to claim 1, is characterized in that, the maximum cross-section area of charge-trapping device is the long-pending 30%-90% of the wall cross-section in metal delivery tubes road, or is the 3%-10% of pipeline by area.
3. method according to claim 1, is characterized in that, charge-trapping device is fixed on inner-walls of duct by metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510631280.0A CN105135153B (en) | 2015-09-28 | 2015-09-28 | Suppress the method for metal delivery tubes road inner wall corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510631280.0A CN105135153B (en) | 2015-09-28 | 2015-09-28 | Suppress the method for metal delivery tubes road inner wall corrosion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105135153A true CN105135153A (en) | 2015-12-09 |
| CN105135153B CN105135153B (en) | 2018-01-02 |
Family
ID=54720619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510631280.0A Expired - Fee Related CN105135153B (en) | 2015-09-28 | 2015-09-28 | Suppress the method for metal delivery tubes road inner wall corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105135153B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5006214A (en) * | 1990-02-05 | 1991-04-09 | Burchnell Donald H | Cathodic protection apparatus |
| JPH0835085A (en) * | 1994-07-22 | 1996-02-06 | Nippon Alum Co Ltd | Corrosion preventing method of aluminum material and sacrificial anode for corrosion prevention of aluminum material |
| CN1590587A (en) * | 2003-08-29 | 2005-03-09 | 中国石油天然气股份有限公司 | Method for protecting inner wall of anti-corrosion pipeline joint by using sacrificial anode |
| CN101144166A (en) * | 2007-09-21 | 2008-03-19 | 大庆石油管理局 | Method for carrying corrosion-resistant treatment to large-scale oil storage tank for realizing pressure test by filling sea water |
| CN201095649Y (en) * | 2007-08-28 | 2008-08-06 | 天津市巨星防腐检测工程有限公司 | Replaceable pipeline inner annular anode |
| CN204664748U (en) * | 2015-04-08 | 2015-09-23 | 张燕 | Embedded pipe inner-wall cathode protector |
-
2015
- 2015-09-28 CN CN201510631280.0A patent/CN105135153B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5006214A (en) * | 1990-02-05 | 1991-04-09 | Burchnell Donald H | Cathodic protection apparatus |
| JPH0835085A (en) * | 1994-07-22 | 1996-02-06 | Nippon Alum Co Ltd | Corrosion preventing method of aluminum material and sacrificial anode for corrosion prevention of aluminum material |
| CN1590587A (en) * | 2003-08-29 | 2005-03-09 | 中国石油天然气股份有限公司 | Method for protecting inner wall of anti-corrosion pipeline joint by using sacrificial anode |
| CN201095649Y (en) * | 2007-08-28 | 2008-08-06 | 天津市巨星防腐检测工程有限公司 | Replaceable pipeline inner annular anode |
| CN101144166A (en) * | 2007-09-21 | 2008-03-19 | 大庆石油管理局 | Method for carrying corrosion-resistant treatment to large-scale oil storage tank for realizing pressure test by filling sea water |
| CN204664748U (en) * | 2015-04-08 | 2015-09-23 | 张燕 | Embedded pipe inner-wall cathode protector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105135153B (en) | 2018-01-02 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |