CN101696503A - Cathodic protection system for trenchless construction large diameter pipeline - Google Patents
Cathodic protection system for trenchless construction large diameter pipeline Download PDFInfo
- Publication number
- CN101696503A CN101696503A CN200910188086A CN200910188086A CN101696503A CN 101696503 A CN101696503 A CN 101696503A CN 200910188086 A CN200910188086 A CN 200910188086A CN 200910188086 A CN200910188086 A CN 200910188086A CN 101696503 A CN101696503 A CN 101696503A
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- anode
- pipeline
- construction
- cathodic protection
- sacrificial anode
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Links
- 238000010276 construction Methods 0.000 title claims abstract description 66
- 238000004210 cathodic protection Methods 0.000 title claims abstract description 51
- 239000011253 protective coating Substances 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims description 12
- 239000004035 construction material Substances 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000007769 metal material Substances 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 235000011837 pasties Nutrition 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- PANBYUAFMMOFOV-UHFFFAOYSA-N sodium;sulfuric acid Chemical compound [Na].OS(O)(=O)=O PANBYUAFMMOFOV-UHFFFAOYSA-N 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000015041 whisky Nutrition 0.000 description 1
Images
Abstract
The invention relates to a cathodic protection system for a trenchless construction large diameter pipeline, which carries out protection aiming at large diameter pipeline trenchless construction (1). The cathodic protection system for a trenchless construction large diameter pipeline concretely comprises a protective coating arranged on the outer wall of a pipeline of the large diameter pipeline trenchless construction (1) and a sacrificial anode protection device (3) electrically connected to the large diameter pipeline trenchless construction (1), wherein the sacrificial anode protection device (3) forms electric connection with the large diameter pipeline trenchless construction (1) concretely through a cathodic protection feeder device (113) arranged on the pipeline. The invention provides a novel cathodic protection pipeline construction system which has obvious technical effect as well as expectable and great economic and social values.
Description
Technical field
The present invention relates to metallic conduit anti-corrosion protection technology, a kind of cathodic protection system for trenchless construction large diameter pipeline is provided especially.
Background technology
Traditional large diameter pipeline process for corrosion control has following two big classes:
Isolating metal pipeline and corrosive environment for example have the coating of corrosion-resisting function at the outside coating of metallic conduit; Adopt the method for electrochemical anti-corrosive to carry out anti-corrosive treatment, sacrificial anode device for example is installed.
Therefore, people urgently wish to obtain the better cathodic protection system for trenchless construction large diameter pipeline of a kind of technique effect.
Summary of the invention
The purpose of this invention is to provide the better cathodic protection system for trenchless construction large diameter pipeline of a kind of technique effect.
Cathodic protection system for trenchless construction large diameter pipeline is protected at heavy-caliber pipeline non-excavating construction 1; It is characterized in that:
Described cathodic protection system for trenchless construction large diameter pipeline specifically is constructed as follows: be arranged in the pipeline outer wall of heavy-caliber pipeline non-excavating construction 1 protective coating, be connected electrically in the sacrificial anode protection device 3 on the heavy-caliber pipeline non-excavating construction 1;
Described sacrificial anode protection device 3 concrete cathodic protection feeder device 113 by construction and installation in advance on pipeline are electrically connected with heavy-caliber pipeline non-excavating construction 1 formation.
In the cathodic protection system for trenchless construction large diameter pipeline, require each segment pipe 1 end is cleaned out supercoat for one section, will weld fixing then between each section pipe and sealing, the repaired mouth operation after also requiring afterwards again to weld;
The requirement that described pipeline outer wall weld is carried out repaired mouth operation is specifically: at first not seal coat position and near residue thereof after the cleaning welding; afterwards the weld of pipeline outside and near apply supercoat again, make that each section pipe is common to form the integral body that an outer setting has continuous protective coating.
The described sacrificial anode protection device 3 that is connected electrically on the heavy-caliber pipeline non-excavating construction 1 by means of cathodic protection feeder device 113 is arranged in the face of land or underground, and its concrete structure is as follows:
Its global shape is bar-shaped, its core innermost layer is the support and connection portion 301 of the metal material that can be electrically connected, one end of described support and connection portion 301 is connected on the heavy-caliber pipeline non-excavating construction 1 by cathodic protection feeder device 113 with the electrical connection form, and the surface of its other end and support and connection portion 301 is covered by sacrificial anode portion 302; The sacrificial anode portion 302 of sacrificial anode protection device 3 is wrapped in the filler bag 303.
The described sacrificial anode protection device 3 that is connected electrically on the heavy-caliber pipeline non-excavating construction 1 by means of cathodic protection feeder device 113 is arranged in the face of land or underground, and its concrete structure is as follows:
Its global shape is bar-shaped, its core innermost layer is the support and connection portion 301 of the metal material that can be electrically connected, one end of described support and connection portion 301 is connected on the heavy-caliber pipeline non-excavating construction 1 by cathodic protection feeder device 113 with the electrical connection form, and the surface of its other end and support and connection portion 301 is covered by sacrificial anode portion 302; The sacrificial anode portion 302 of sacrificial anode protection device 3 is wrapped in the filler bag 303; described filler bag 303 uses the pasty state sacrificial anode to add construction materials contract and makes in order to sacrificial anode portion 302 in the parcel sacrificial anode protection device 3, and the mass percent that described pasty state sacrificial anode adds construction materials contract consists of terra alba: industrial sulphuric acid sodium: wilkinite=75: 5: 20.
Design according to following principle when using sacrificial anode protection device 3 and select for use:
Concrete computation process is:
1) the protection area calculates: for circular pipe, and pipeline area: A
c=π * D * L, in the formula: D is a pipe diameter, L is a length of tube;
2) protective current of Xu Yaoing: I
Ci=i
c* A
c* f
Ci, I
Cm=i
c* A
c* f
Cm, I
Cf=i
c* A
c* f
CfWherein: i
cBe protective current density, relevant with the material of the content of soil, temperature, pipeline; I
Ci, I
Cm, I
CfBe respectively the protective current density needs in initial, average and latter stage; f
Ci, f
Cm, f
CfBe respectively the supercoat breakage rate in initial, average and latter stage;
3) the anode total mass is calculated according to following formula:
4) anode quantity Calculation:
Single anodic stake resistance uses following two formulas to calculate:
In the formula: R
HBe the horizontal anode grounding resistance, the Ω of unit; R
VBe vertical anode grounding resistance, the Ω of unit; P is a soil resistivity, the Ω .m of unit; p
aFor filling out construction materials contract resistivity, the Ω .m of unit; L is an anode length, the m of unit; L
aBe anode packing layer length, the m of unit; D is the anode equivalent diameter, the m of unit; D is the packing layer diameter, the m of unit; T is the distance on anodes centre to ground, the m of unit;
The combined anode stake resistance calculates according to following formula:
In the formula: R
TalBe the total stake resistance of anode group, the Ω of unit; R
VBe vertical anode grounding resistance, the Ω of unit; K is a correction factor; N is an anode quantity;
Single anode outward current:
In the formula: I
aBe single anode outward current; Δ E is the effective potential difference of anode; R is the loop total electrical resistance;
Required anode quantity:
In the formula: N is an anodic quantity; I
ABe required protective current; I
aBe single anode outward current; F is a reserve factor;
5). checking computations: after calculating the result, need check,, need satisfy following three conditions simultaneously, could guarantee that sacrificial anode satisfies the requirement of galvanic protection under arms in initial stage, mid-term and latter stage according to Norske standard:
1. C
A (tot)=NC
a＞I
CmT
f8760; 2. I
Ai (tot)=NI
Ai＞I
Ci3. I
Af (tot)=NI
Af＞I
CfIn the formula: C
A (tot)Be anode total volume, I
CiBe the total current that initially needs; I
CfBe the total current that needs latter stage.
Described sacrificial anode protection device 3 concrete mounting arrangements at distance heavy-caliber pipeline non-excavating construction 1 relatively at a distance, it is specially sacrificial magnesium anode or/and sacrificial zinc anode; It arranges that arrangement pitch is 50～5000m separately or in groups along heavy-caliber pipeline non-excavating construction 1.
The present invention proposes a kind of galvanic protection piping installation system of new form, its technique effect is obvious, has expected huge economy and social value.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and the embodiments:
The present invention is further detailed explanation below in conjunction with drawings and the embodiments:
Fig. 1 makes the installation simplified schematic diagram for heavy-caliber pipeline non-excavating construction cathodic protection feeder device;
Fig. 2 is a heavy-caliber pipeline non-excavating construction cathodic protection feeder device open holes boring schematic diagram;
Fig. 3 is that heavy-caliber pipeline non-excavating construction cathodic protection feeder device is installed schematic diagram;
Fig. 4 is a heavy-caliber pipeline non-excavating construction cathodic protection feeder device structural representation;
Fig. 5 is sacrificial anode protection device 3 basic block diagram.
Embodiment
The implication of each number designation in the accompanying drawing of the present invention is as follows:
Non-excavating construction heavy caliber pipe-jacking pipeline 1, sacrificial anode protection device 3, support and connection portion 301: the cathodic protection feeder device steel core, sacrificial anode portion 302, the insulation covering 4 that are in internal layer;
Cathodic protection feeder device 113, cathodic protection feeder device 113 specifically include following two parts: be in internal layer cathodic protection feeder device steel core 111, be in outer field cathodic protection feeder device anti-corrosion protection external coating (EC) 110, be used for cathodic protection feeder device 113 is installed in mount pad 112 on the non-excavating construction heavy caliber pipe-jacking pipeline 1;
Flanged (FLGD) sleeve pipe 114 (being fixed on the inwall of non-excavating construction heavy caliber pipe-jacking pipeline 1), pilot seal device 115, pole 116, sandwich valve 117, fire proof motor 119, alloy bit 120, drilling rod 121, whisky jack 118;
Cathodic protection system for trenchless construction large diameter pipeline is protected at heavy-caliber pipeline non-excavating construction 1; Described cathodic protection system for trenchless construction large diameter pipeline specifically is constructed as follows: be arranged in the pipeline outer wall of heavy-caliber pipeline non-excavating construction 1 protective coating, be connected electrically in the sacrificial anode protection device 3 on the heavy-caliber pipeline non-excavating construction 1;
Described sacrificial anode protection device 3 concrete cathodic protection feeder device 113 by construction and installation in advance on pipeline are electrically connected with heavy-caliber pipeline non-excavating construction 1 formation.
In the cathodic protection system for trenchless construction large diameter pipeline, require each segment pipe 1 end is cleaned out supercoat for one section, will weld fixing then between each section pipe and sealing, the repaired mouth operation after also requiring afterwards again to weld;
The requirement that described pipeline outer wall weld is carried out repaired mouth operation is specifically: at first not seal coat position and near residue thereof after the cleaning welding; afterwards the weld of pipeline outside and near apply supercoat again, make that each section pipe is common to form the integral body that an outer setting has continuous protective coating.
The described sacrificial anode protection device 3 that is connected electrically on the heavy-caliber pipeline non-excavating construction 1 by means of cathodic protection feeder device 113 is arranged in the face of land or underground, and its concrete structure is as follows:
Its global shape is bar-shaped, its core innermost layer is the support and connection portion 301 of the metal material that can be electrically connected, one end of described support and connection portion 301 is connected on the heavy-caliber pipeline non-excavating construction 1 by cathodic protection feeder device 113 with the electrical connection form, and the surface of its other end and support and connection portion 301 is covered by sacrificial anode portion 302; The sacrificial anode portion 302 of sacrificial anode protection device 3 is wrapped in the filler bag 303.
The described sacrificial anode protection device 3 that is connected electrically on the heavy-caliber pipeline non-excavating construction 1 by means of cathodic protection feeder device 113 is arranged in the face of land or underground, and its concrete structure is as follows:
Its global shape is bar-shaped, its core innermost layer is the support and connection portion 301 of the metal material that can be electrically connected, one end of described support and connection portion 301 is connected on the heavy-caliber pipeline non-excavating construction 1 by cathodic protection feeder device 113 with the electrical connection form, and the surface of its other end and support and connection portion 301 is covered by sacrificial anode portion 302; The sacrificial anode portion 302 of sacrificial anode protection device 3 is wrapped in the filler bag 303; described filler bag 303 uses the pasty state sacrificial anode to add construction materials contract and makes in order to sacrificial anode portion 302 in the parcel sacrificial anode protection device 3, and the mass percent that described pasty state sacrificial anode adds construction materials contract consists of terra alba: industrial sulphuric acid sodium: wilkinite=75: 5: 20.
Design according to following principle when using sacrificial anode protection device 3 and select for use:
Concrete computation process is:
1) the protection area calculates: for circular pipe, and pipeline area: A
c=π * D * L, in the formula: D is a pipe diameter, L is a length of tube;
2) protective current of Xu Yaoing: I
Ci=i
c* A
c* f
Ci, I
Cm=i
c* A
c* f
Cm, I
Cf=i
c* A
c* f
Cf
Wherein: i
cBe protective current density, relevant with the material of the content of soil, temperature, pipeline; I
Ci, I
Cm, I
CfBe respectively the protective current density needs in initial, average and latter stage; f
Ci, f
Cm, f
CfBe respectively the supercoat breakage rate in initial, average and latter stage;
3) the anode total mass is calculated according to following formula:
4) anode quantity Calculation:
Single anodic stake resistance uses following two formulas to calculate:
In the formula: R
HBe the horizontal anode grounding resistance, the Ω of unit; R
VBe vertical anode grounding resistance, the Ω of unit; P is a soil resistivity, the Ω .m of unit; p
aFor filling out construction materials contract resistivity, the Ω .m of unit; L is an anode length, the m of unit; L
aBe anode packing layer length, the m of unit; D is the anode equivalent diameter, the m of unit; D is the packing layer diameter, the m of unit; T is the distance on anodes centre to ground, the m of unit;
The combined anode stake resistance calculates according to following formula:
In the formula: R
TalBe the total stake resistance of anode group, the Ω of unit; R
VBe vertical anode grounding resistance, the Ω of unit; K is a correction factor; N is an anode quantity;
Single anode outward current:
In the formula: I
aBe single anode outward current; Δ E is the effective potential difference of anode; R is the loop total electrical resistance;
Required anode quantity:
In the formula: N is an anodic quantity; I
ABe required protective current; I
aBe single anode outward current; F is a reserve factor;
5). checking computations: after calculating the result, need check,, need satisfy following three conditions simultaneously, could guarantee that sacrificial anode satisfies the requirement of galvanic protection under arms in initial stage, mid-term and latter stage according to Norske standard:
1. C
A (tot)=NC
a＞I
CmT
f8760; 2. I
Ai (tot)=NI
Ai＞I
Ci3. I
Af (tot)=NI
Af＞I
CfIn the formula: C
A (tot)Be anode total volume, I
CiBe the total current that initially needs; I
CfBe the total current that needs latter stage.
Described sacrificial anode protection device 3 concrete mounting arrangements at distance heavy-caliber pipeline non-excavating construction 1 relatively at a distance, it is specially sacrificial magnesium anode or/and sacrificial zinc anode; It arranges that arrangement pitch is 50～5000m separately or in groups along heavy-caliber pipeline non-excavating construction 1.
Claims (6)
1. cathodic protection system for trenchless construction large diameter pipeline is protected at heavy-caliber pipeline non-excavating construction (1); It is characterized in that:
Described cathodic protection system for trenchless construction large diameter pipeline specifically is constructed as follows: be arranged in the pipeline outer wall of heavy-caliber pipeline non-excavating construction (1) protective coating, be connected electrically in the sacrificial anode protection device (3) on the heavy-caliber pipeline non-excavating construction (1);
The concrete cathodic protection feeder device (113) by construction and installation in advance on pipeline of described sacrificial anode protection device (3) is electrically connected with heavy-caliber pipeline non-excavating construction (1) formation.
2. according to the described cathodic protection system for trenchless construction large diameter pipeline of claim 1, it is characterized in that: in the cathodic protection system for trenchless construction large diameter pipeline, requirement cleans out supercoat for one section with each segment pipe (1) end, to weld fixing and sealing then between each section pipe, the repaired mouth operation after also requiring afterwards again to weld;
The requirement that described pipeline outer wall weld is carried out repaired mouth operation is specifically: at first not seal coat position and near residue thereof after the cleaning welding; afterwards the weld of pipeline outside and near apply supercoat again, make that each section pipe is common to form the integral body that an outer setting has continuous protective coating.
3. according to the described cathodic protection system for trenchless construction large diameter pipeline of claim 2; it is characterized in that: the described sacrificial anode protection device (3) that is connected electrically on the heavy-caliber pipeline non-excavating construction (1) by means of cathodic protection feeder device (113) is arranged in the face of land or underground, and its concrete structure is as follows:
Its global shape is bar-shaped, its core innermost layer is the support and connection portion (301) of the metal material that can be electrically connected, one end of described support and connection portions (301) is connected on the heavy-caliber pipeline non-excavating construction (1) by cathodic protection feeder device (113) with the electrical connection form, and the surface of its other end and support and connection portion (301) is covered by sacrificial anode portion (302); The sacrificial anode portion (302) of sacrificial anode protection device (3) is wrapped in the filler bag (303).
4. according to the described cathodic protection system for trenchless construction large diameter pipeline of claim 3; it is characterized in that: the described sacrificial anode protection device (3) that is connected electrically on the heavy-caliber pipeline non-excavating construction (1) by means of cathodic protection feeder device (113) is arranged in the face of land or underground, and its concrete structure is as follows:
Its global shape is bar-shaped, its core innermost layer is the support and connection portion (301) of the metal material that can be electrically connected, one end of described support and connection portions (301) is connected on the heavy-caliber pipeline non-excavating construction (1) by cathodic protection feeder device (113) with the electrical connection form, and the surface of its other end and support and connection portion (301) is covered by sacrificial anode portion (302); The sacrificial anode portion (302) of sacrificial anode protection device (3) is wrapped in the filler bag (303); described filler bag (303) uses the pasty state sacrificial anode to add construction materials contract and makes in order to sacrificial anode portion (302) in the parcel sacrificial anode protection device (3), and the mass percent that described pasty state sacrificial anode adds construction materials contract consists of terra alba: industrial sulphuric acid sodium: wilkinite=75: 5: 20.
5. according to the described cathodic protection system for trenchless construction large diameter pipeline of claim 3, it is characterized in that: design according to following principle when using sacrificial anode protection device (3) and select for use:
Concrete computation process is:
1) the protection area calculates: for circular pipe, and pipeline area: A
c=π * D * L, in the formula: D is a pipe diameter, L is a length of tube;
2) protective current of Xu Yaoing: I
Ci=i
c* A
c* f
Ci, I
Cm=i
c* A
c* f
Cm, I
Cf=i
c* A
c* f
CfWherein: i
cBe protective current density, relevant with the material of the content of soil, temperature, pipeline; I
Ci, I
Cm, I
CfBe respectively the protective current density needs in initial, average and latter stage; f
Ci, f
Cm, f
CfBe respectively the supercoat breakage rate in initial, average and latter stage;
3) the anode total mass is calculated according to following formula:
4) anode quantity Calculation:
Single anodic stake resistance uses following two formulas to calculate:
In the formula: R
HBe the horizontal anode grounding resistance, the Ω of unit; R
VBe vertical anode grounding resistance, the Ω of unit; P is a soil resistivity, the Ω .m of unit; p
aFor filling out construction materials contract resistivity, the Ω .m of unit; L is an anode length, the m of unit; L
aBe anode packing layer length, the m of unit; D is the anode equivalent diameter, the m of unit; D is the packing layer diameter, the m of unit; T is the distance on anodes centre to ground, the m of unit;
The combined anode stake resistance calculates according to following formula:
In the formula: R
TalBe the total stake resistance of anode group, the Ω of unit; R
VBe vertical anode grounding resistance, the Ω of unit; K is a correction factor; N is an anode quantity;
Single anode outward current:
In the formula: I
aBe single anode outward current; Δ E is the effective potential difference of anode; R is the loop total electrical resistance;
Required anode quantity:
In the formula: N is an anodic quantity; I
ABe required protective current; I
aBe single anode outward current; F is a reserve factor;
5). checking computations: after calculating the result, need check,, need satisfy following three conditions simultaneously, could guarantee that sacrificial anode satisfies the requirement of galvanic protection under arms in initial stage, mid-term and latter stage according to Norske standard:
1. C
A (tot)=NC
a＞I
CmT
f8760; 2. I
Ai (tot)=NI
Ai＞I
Ci3. I
Af (tot)=NI
Af＞I
CfIn the formula: C
A (tot)Be anode total volume, I
CiBe the total current that initially needs; I
CfBe the total current that needs latter stage.
6. according to the described cathodic protection system for trenchless construction large diameter pipeline of claim 5, it is characterized in that: the concrete mounting arrangements of described sacrificial anode protection device (3) at distance heavy-caliber pipeline non-excavating construction (1) relatively at a distance, it is specially sacrificial magnesium anode or/and sacrificial zinc anode; It arranges that arrangement pitch is 50～5000m separately or in groups along heavy-caliber pipeline non-excavating construction (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101880864A CN101696503B (en) | 2009-10-26 | 2009-10-26 | Cathodic protection system for trenchless construction large diameter pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101880864A CN101696503B (en) | 2009-10-26 | 2009-10-26 | Cathodic protection system for trenchless construction large diameter pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101696503A true CN101696503A (en) | 2010-04-21 |
| CN101696503B CN101696503B (en) | 2012-01-25 |
Family
ID=42141627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101880864A Expired - Fee Related CN101696503B (en) | 2009-10-26 | 2009-10-26 | Cathodic protection system for trenchless construction large diameter pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101696503B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995026A (en) * | 2011-10-24 | 2013-03-27 | 中国科学院金属研究所 | Construction method for cathode protection device for underground pipeline system |
| CN103727398A (en) * | 2013-11-08 | 2014-04-16 | 安徽省特种设备检测院 | Non-excavation detection method for outer anti-corrosion layer of buried steel pipeline |
| CN107287601A (en) * | 2016-04-12 | 2017-10-24 | 海南电力技术研究院 | A kind of sacrificial magnesium alloy anode containing sodium nitrate fills out construction materials contract and preparation method thereof |
-
2009
- 2009-10-26 CN CN2009101880864A patent/CN101696503B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995026A (en) * | 2011-10-24 | 2013-03-27 | 中国科学院金属研究所 | Construction method for cathode protection device for underground pipeline system |
| CN102995027A (en) * | 2011-10-24 | 2013-03-27 | 中国科学院金属研究所 | Sacrificial anode for cathode protection of underground pipeline system |
| CN102995026B (en) * | 2011-10-24 | 2014-12-10 | 中国科学院金属研究所 | Construction method for cathode protection device for underground pipeline system |
| CN102995027B (en) * | 2011-10-24 | 2015-06-10 | 中国科学院金属研究所 | Sacrificial anode for cathode protection of underground pipeline system |
| CN103727398A (en) * | 2013-11-08 | 2014-04-16 | 安徽省特种设备检测院 | Non-excavation detection method for outer anti-corrosion layer of buried steel pipeline |
| CN103727398B (en) * | 2013-11-08 | 2016-03-02 | 安徽省特种设备检测院 | Buried steel pipe external anti-corrosion layer Indirect testing method |
| CN107287601A (en) * | 2016-04-12 | 2017-10-24 | 海南电力技术研究院 | A kind of sacrificial magnesium alloy anode containing sodium nitrate fills out construction materials contract and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101696503B (en) | 2012-01-25 |
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