CN101593878B - Aluminum-copper pseudo alloy anticorrosion coating for grounding network and spraying method thereof - Google Patents
Aluminum-copper pseudo alloy anticorrosion coating for grounding network and spraying method thereof Download PDFInfo
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- CN101593878B CN101593878B CN2009100160993A CN200910016099A CN101593878B CN 101593878 B CN101593878 B CN 101593878B CN 2009100160993 A CN2009100160993 A CN 2009100160993A CN 200910016099 A CN200910016099 A CN 200910016099A CN 101593878 B CN101593878 B CN 101593878B
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- copper
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- grounding network
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- 238000000576 coating method Methods 0.000 title claims abstract description 38
- 239000011248 coating agent Substances 0.000 title claims abstract description 34
- 238000005507 spraying Methods 0.000 title claims abstract description 28
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 27
- 239000000956 alloy Substances 0.000 title claims abstract description 27
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000010949 copper Substances 0.000 claims abstract description 29
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052802 copper Inorganic materials 0.000 claims abstract description 25
- 238000010891 electric arc Methods 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 150000002739 metals Chemical class 0.000 claims abstract description 3
- 239000004411 aluminium Substances 0.000 claims description 20
- 239000007921 spray Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 2
- -1 ferrous metals Chemical class 0.000 claims description 2
- 239000003595 mist Substances 0.000 claims description 2
- 238000005488 sandblasting Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 18
- 230000007797 corrosion Effects 0.000 abstract description 18
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 2
- 239000010962 carbon steel Substances 0.000 abstract description 2
- 239000002689 soil Substances 0.000 description 23
- 238000005246 galvanizing Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 229910001335 Galvanized steel Inorganic materials 0.000 description 4
- 239000008397 galvanized steel Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910007667 ZnOx Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The invention discloses an aluminum-copper pseudo alloy anticorrosion coating for a grounding network and a spraying method thereof. According to one aspect of the invention, the coating consists of two nonferrous metals, namely copper and aluminum which are evenly sprayed; the content of the copper accounts for 14 to 21 percent by weight, and the balance is the aluminum; and the thickness of the coating is 100 to 300 mu m. According to the other aspect of the invention, the spraying method comprises the following steps: cleaning and coarsening the carbon steel surface to be sprayed; and then spraying an aluminum wire and a copper clad aluminum wire as two electrodes of an electric arc by using an electric arc spraying device till the spraying surface forms the coating of 100 to 300 mu m, wherein the copper content of the coating is 14 to 21 percent by weight, and the balance is the aluminum. The invention provides the aluminum-copper pseudo alloy anticorrosion coating for the grounding network and the spraying method thereof, so that the grounding network of a power system has good electric conductivity and corrosion resistance, and the cost is low.
Description
(1) technical field
The present invention relates to a kind of aluminum-copper pseudo alloy anticorrosion coating for grounding network and spraying method thereof, specifically relate to a kind of electric power system aluminum-copper pseudo alloy anticorrosion coating for grounding network and spraying method thereof.
(2) background technology
Ground network is one of important leverage of generating, power transformation and transmission system safe operation.At present the subject matter that exists of ground network be that grounding resistance exceeds standard, the corrosion of grounding resistance instability and earth electrode, and preceding two problems often have much relations with back one problem.Ground network is buried under the ground, because the complexity of soil constituent and structure, ground network is very easily corroded, and general ground network was rotted in 10 years, and soon 3～4 years are rotten.Ground net corrosion causes earth resistance to raise, and can not satisfy the ground network designing requirement, causes when suffering thunder and lightning or short circuit and accident causes enormous economic loss.Because the disguise of earth mat engineering, designing the general electric substation time limit for ground network in principle should be less than 30 year, and the earth mat life-span of important pivot transformer station should be considered by 50 years.Therefore the corrosion and protection technology of studying ground network becomes the very active problem of international academic community.
Domestic earthing material commonly used generally is hot-galvanized steel and copper at present.Wherein hot-galvanized steel is because galvanized layer thickness is limited, and corrosion resistance is not fine, generally moves 8～10 years and serious corrosion will occur; And hot galvanizing is easy to generate ZnOx cloud, influences workers'health.Though and copper is good ground connection electric conducting material, anti-soil corrosion ability is strong, and the life-span of copper ground network can guarantee reliability service 25～30 years; But copper belongs to heavy metal, easy contaminated soil, among China soil environment quality standard GB15618-1995 in the regulation soil the high-load of copper to be lower than 400mg/kg, and the price height of copper, its ground network cost is 5～6 times of galvanized steel.In addition, strengthening the earth electrode cross section is one of effective means that solves ground net corrosion, has increased the consumption of steel but strengthen the earth electrode cross section, and has increased difficulty of construction.
(3) summary of the invention
Therefore, the present invention provides a kind of aluminum-copper pseudo alloy anticorrosion coating for grounding network and spraying method thereof in order to overcome the above-mentioned defective of prior art, make electric power system ground network electric conductivity and Corrosion Protection better, and cost is lower.
According to an aspect of the present invention, be a kind of aluminum-copper pseudo alloy anticorrosion coating for grounding network, this coating is evenly sprayed by copper and two kinds of non-ferrous metals of aluminium and forms, and the content of these two kinds of metals (weight): copper is 14%-21%, surplus is an aluminium, and coating layer thickness is 100 μ m～300 μ m.
According to another aspect of the present invention, a kind of spraying method of aluminum-copper pseudo alloy anticorrosion coating for grounding network, it may further comprise the steps:
A) cleaning and alligatoring steel surface to be sprayed;
B) use aluminium wire and copper-clad aluminium wire electric arc spraying equipment to spray as the two poles of the earth of electric arc then, form 100 μ m～300 μ m coatings to sprayed surface, this coating levels (weight) copper is 14%-21%, and surplus is an aluminium.
According to technical solution of the present invention, because aluminium easy oxidation in soil generates the alundum (Al oxide-film, oxide-film has good corrosion resistance.And copper has good electrical conductivity and anti-soil corrosivity in soil, and reason is that copper generates copper in soil hydrous oxide and sulfate has conductivity preferably, has slower growth rate simultaneously, and matrix is had protective effect.The oxide of aluminium is non-conductive, and the adding of a little copper element has increased the conductivity of coating, can guarantee the electric power system reliable ground, and can satisfy among the GB15618-1995 requirement to copper content.Adopt the aluminum-copper pseudo alloy coating of the method acquisition of electric arc spraying to have good thermal stability, and structure is even.
Aluminum-copper pseudo alloy coating of the present invention at high temperature, at a high speed under with matrix bond be one, can satisfy that ground network is corrosion-resistant, the requirement of conduction and thermal stability, technology is simple, low price has reduced the cost of electric power system ground network.And through check, the material corrosion resistance and the conductivity of the pseudo-alloy coat of aluminium-plated copper all are better than galvanized steel.
The spraying method of above-mentioned aluminum-copper pseudo alloy anticorrosion coating for grounding network adopts sandblasting pretreatment technology cleaning and alligatoring steel surface to be sprayed.
In described spraying process, need the molten metal mist is accelerated to supersonic speed, spray to workpiece and form coating.
(4) embodiment
Below technical scheme of the present invention is made exemplary illustration:
Embodiment 1:Cu 14%, surplus is Al (percentage by weight).
Component proportioning according to the embodiment design cooperates Φ 2.05 copper-clad aluminium wires with Φ 3 aluminium wires, adopt TLAS-III type high-performance electric arc spraying equipment to spray.Φ 2.05 copper-clad aluminium wires and Φ 3 aluminium wires are evenly sent a material to as the two poles of the earth of electric arc spraying, after the striking, the silk material of evenly sending to melts under arcing, compressed air atomizes molten metal after Laval nozzle quickens, and the molten drop of atomizing accelerated to supersonic speed, spraying to and forming thickness through the steel surface of blasting treatment is 100 μ m～300 μ m coatings.The coating thickness here is a Measurement Allowance, in this scope, can effectively play corrosion-resisting function, and saves cost.
Adopt above-mentioned preparation method, prepare Cu 14%, surplus is the aluminum-copper pseudo alloy coating sample of Al (percentage by weight).The pseudo-alloy sample of aluminium-plated copper and galvanizing sample be placed in the soil accelerate corrosion test case carry out accelerated test.Through 289 hours high temperature, high-moisture accelerated test, observe the surface of sample, galvanizing sample has corroded peeling, and has large tracts of land to come off, and there is slight corrosion pit aluminum-copper pseudo alloy coating sample part, and corrosion resistance is significantly better than galvanizing sample.In the test, the contact resistance to two kinds of samples and soil carries out kinetic measurement simultaneously.The sample of the pseudo-alloy coat of aluminium-plated copper and the contact resistance of soil are lower than the contact resistance of galvanizing sample all the time, and resistance is stable.At etching time is 289 hours, and the soil moisture is 51.3 ℃, and soil moisture content is 10% o'clock, and the contact resistance of galvanizing sample and soil is 173.2 Ω, and the contact resistance of aluminum-copper pseudo alloy coating sample and soil is 120.9 Ω.
Embodiment 2
Cu 21%, and surplus is Al (percentage by weight).
Component proportioning according to the embodiment design cooperates Φ 2.05 copper-clad aluminium wires with Φ 2 aluminium wires, adopt TLAS-III type high-performance electric arc spraying equipment to spray.Φ 2.05 copper-clad aluminium wires and Φ 2 aluminium wires are evenly sent a material to as the two poles of the earth of electric arc spraying, after the striking, the silk material of evenly sending to melts under arcing, compressed air atomizes molten metal after Laval nozzle quickens, and the molten drop of atomizing accelerated to supersonic speed, spraying to and forming thickness through the carbon steel of blasting treatment is 100 μ m～300 μ m coatings.
Adopt above-mentioned preparation method, prepare Cu 21%, surplus is the aluminum-copper pseudo alloy coating sample of Al (percentage by weight).The spray sample of aluminum-copper pseudo alloy and galvanizing sample be placed in the soil accelerate corrosion test case carry out accelerated test.Through 289 hours high temperature, high-moisture accelerated test, observe specimen surface, galvanizing sample has corroded peeling, and has large tracts of land to come off, and there is slight corrosion pit aluminum-copper pseudo alloy coating sample part, and corrosion resistance is significantly better than galvanizing sample.In the test, the contact resistance to 2 kinds of samples and soil carries out kinetic measurement simultaneously.The sample of the pseudo-alloy coat of aluminium-plated copper and the contact resistance of soil are lower than the contact resistance of galvanizing sample all the time, and resistance is stable.At etching time is 289 hours, and the soil moisture is 51.3 ℃, and soil moisture content is 10% o'clock, and the contact resistance of galvanizing sample and soil is 173.2 Ω, and the contact resistance of aluminum-copper pseudo alloy coating sample and soil is 118.8 Ω.
Claims (4)
1. aluminum-copper pseudo alloy anticorrosion coating for grounding network, this coating by copper and two kinds of non-ferrous metals of aluminium evenly spraying form and the content of these two kinds of metals (weight): copper is 14%-21%, and surplus is an aluminium, and coating layer thickness is 100 μ m～300 μ m.
2. the spraying method of an aluminum-copper pseudo alloy anticorrosion coating for grounding network, it may further comprise the steps:
A) cleaning and alligatoring steel surface to be sprayed;
B) use aluminium wire and copper-clad aluminium wire electric arc spraying equipment to spray as the two poles of the earth of electric arc then, form 100 μ m～300 μ m coatings to sprayed surface, this coating levels (weight) copper is 14%-21%, and surplus is an aluminium.
3. the spraying method of aluminum-copper pseudo alloy anticorrosion coating for grounding network according to claim 2 is characterized in that: adopt sandblasting pretreatment technology cleaning and alligatoring steel surface to be sprayed.
4. the spraying method of aluminum-copper pseudo alloy anticorrosion coating for grounding network according to claim 2 is characterized in that: in described spraying process, need the molten metal mist is accelerated to supersonic speed, spray to workpiece and form coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100160993A CN101593878B (en) | 2009-07-07 | 2009-07-07 | Aluminum-copper pseudo alloy anticorrosion coating for grounding network and spraying method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100160993A CN101593878B (en) | 2009-07-07 | 2009-07-07 | Aluminum-copper pseudo alloy anticorrosion coating for grounding network and spraying method thereof |
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| Publication Number | Publication Date |
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| CN101593878A CN101593878A (en) | 2009-12-02 |
| CN101593878B true CN101593878B (en) | 2010-09-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101980403A (en) * | 2010-11-23 | 2011-02-23 | 山东鲁能节能设备开发有限公司 | Pseudo alloy anticorrosion coating for grounding net of power system |
| CN104831225B (en) * | 2015-03-30 | 2017-06-09 | 国家电网公司 | A kind of method of coating antiseptic containing rare earth alloy for grounded screen protection |
| CN108531794B (en) * | 2018-04-20 | 2020-01-24 | 江苏新远程电缆有限公司 | Conductor material for ultrahigh-voltage power cable and preparation method thereof |
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Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: SHANDONG RESEARCH INST. OF ELECTRIC POWER Effective date: 20130503 Owner name: SHANDONG RESEARCH INST. OF ELECTRIC POWER Effective date: 20130503 |
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Effective date of registration: 20130503 Address after: 100032 West Chang'an Avenue, Beijing, No. 86, No. Patentee after: State Grid Corporation of China Patentee after: SHANDONG ELECTRIC POWER Research Institute Address before: 250002 Shandong Electric Power Research Institute, No. 500, 2nd Ring Road, sixteen Li Town, Ji'nan City, Shandong Patentee before: SHANDONG ELECTRIC POWER Research Institute |
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Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: Shandong Electric Power Research Institute Address before: No. 86, Chang'an Street, Xicheng District, Beijing 100032 Patentee before: State Grid Corporation of China Patentee before: Shandong Electric Power Research Institute |
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Effective date of registration: 20220127 Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: STATE GRID CORPORATION OF CHINA Patentee before: Shandong Electric Power Research Institute |