CN1262785C - Composite outer anti corrosive coating in use for heavy repair of pipeline - Google Patents
Composite outer anti corrosive coating in use for heavy repair of pipeline Download PDFInfo
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- CN1262785C CN1262785C CN 03157543 CN03157543A CN1262785C CN 1262785 C CN1262785 C CN 1262785C CN 03157543 CN03157543 CN 03157543 CN 03157543 A CN03157543 A CN 03157543A CN 1262785 C CN1262785 C CN 1262785C
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- component
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- pipeline
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Abstract
The present invention relates to a composite outer anti corrosive coating for heavy repair of a pipeline, which is made of asphalt and is a three-layered structure composed of a first layer priming coat selected from a solvent-free epoxy asphalt modification primer or a solvent epoxy polyurethane modification primer or an asphalt polyurethane primer, an intermediate layer formed by filling modification bicomponent solvent-free epoxy dopes in a lattice structure, and an utmost outer cladding layer which is made of glass fiber cloth. The anti corrosive coating has low surface treating requirements on a repaired pipeline. A coating layer has high binding power with the pipeline and can be uniformly coated. The liquid dopes do not flow. The present invention has the advantages of simple construction, high quality, little environmental influence on construction, construction time shortening and construction cost reduction.
Description
Technical field
The present invention is the compound external anti-corrosion layer that the overhaul of asphalt coating pipeline is used.Relate to coating and pipe-line system field.
Background technique
Old oil transportation (gas) pipeline since at that time the aseptic technic level all adopt petroleum tar to make external anti-corrosion layer.Through the operation in 20～30 years, its corrosion-inhibiting coating arrived the aging time limit substantially, and the aging breakage of anticorrosive coat is corroded body, has a strong impact on the Security of pipeline operation.For this reason, must carry out large repairs to these old pipelines.But in anticorrosive coat overhaul process, exist old coating reject difficult, new coating poor adhesive force and locally easily bubble, existing with liquid coating solidify slow, the backfill time is long, leak source is many and the sagging phenomenon seriously makes problems such as in uneven thickness, what make this kind pipeline has accomplished a great problem greatly.
Summary of the invention
The objective of the invention is to invent a kind of simple, the easy coating of surface treatment of petroleum tar external anti-corrosion layer pipeline overhaul, novel corrosion-inhibiting coating that cohesive force is good, coated technique is simple, curing time is short and anticorrosive quality is high of applying to.
Make the existing many deficiencies of pipeline overhaul material according to the various epoxy resin coatings of present employing, solution of the present invention has 3 kinds, promptly make the priming paint of first layer by the petroleum asphalt modified priming paint of no-solvent type epoxy of close petroleum tar or solvent-borne type epoxy polyurethane modified primer or petroleum tar polyurethane primer, packing is made by the modified bi-component solventless epoxy coating in the mesosphere, and outermost is coated by clad.For making the liquid coating coating evenly, do not trickle, the mesosphere adds has put grid structure, it is to recharge the modified bi-component solventless epoxy coating behind the network structure coating curing framework that is formed by nylon mesh or the alkaline-resisting screen cloth of glass fibre, the concrete composition of this coating is: dose 2～4% the formed modified bi-component solventless epoxy coating of silane coupler again in double-component solventless epoxy coating commonly used, modification is for good with the priming paint compatibility like this.No matter adopt which kind of screen cloth and solidify framework, its thickness should be between 0.5～1mm, and the size of mesh is between 2 * 2～4 * 4mm.The thickness of anticorrosive paint layer in the middle of thickness depends on, the size of mesh are wanted coating is not trickled, and have coating as much as possible to cover again.This kind network structure can prevent the trickling of coating in coating process effectively obviously, makes it to solidify evenly.Clad then adopts glass fiber cloth, can prevent that foreign material such as sand from adhering on the anticorrosive coat.Priming paint wherein has 3 kinds of prescriptions, and the petroleum asphalt modified priming paint of no-solvent type epoxy of one is synthetic by A, B double-component, and the A component is by E
44Epoxy resin, liquid petroleum resin, adhesion promote resin, silane coupler, French chalk, petroleum tar and reactive diluent to form; The B component is made up of curing agent and curing accelerator.Its synthetic weight proportion is:
The A component:
E
44Epoxy resin 30～50%
Liquid petroleum resin 15～30%
Adhesion promotes resin 1～2%
Silane coupler 4～8%
French chalk 10～20%
Petroleum tar 10～20%
Reactive diluent 10～20%
The B component
Curing agent 80～83%
Curing agent promoter 17～20%
Its solvent-borne type epoxy polyurethane modified primer of two is synthetic by A, B double-component, and the A component is by E
20, dimethylbenzene, petroleum coal resin, adhesion promotes resin, silane coupler, French chalk, petroleum tar, reactive diluent and defoamer to form, the B component is made up of TDI modified firming agent and curing accelerator.Its proportioning by weight is:
The A component
E
20 20～40％
Dimethylbenzene 20～25%
Petroleum coal resin 10～20%
Adhesion promotes resin 2～4%
Silane coupler 8～10%
French chalk 10～15%
Petroleum tar 5～10%
Reactive diluent 4～10%
Defoamer 1～2%
The B component
TDI modified firming agent 90～96%
Curing accelerator 4～10%
Its petroleum tar polyurethane primer of three is synthetic by A, B double-component, and the A component promotes resin, silane coupler and French chalk to form by castor oil, dimethylbenzene, TDI, adhesion; The B component is made up of castor oil, dimethylbenzene, petroleum resin, petroleum tar, coupling agent and French chalk.Its proportioning by weight is:
The A component
Castor oil 40～50%
Dimethylbenzene 10～20%
TDI 30～40％
Adhesion promotes resin 1～2%
Silane coupler 8～12%
French chalk 5～10%
The B component
Castor oil 10～20%
Dimethylbenzene 5～10%
Petroleum resin 20～30%
Petroleum tar 30～40%
Coupling agent 2～8%
French chalk 20～33%
Embodiment
The petroleum asphalt modified priming paint of embodiment's 1 no-solvent type epoxy, the filling-modified double-component solventless epoxy coating of nylon mesh is done the mesosphere, and glass fiber cloth is made external coating.The composition of priming paint and proportioning by weight are:
A component (is 100% with this component)
E
44Epoxy resin 40%
Liquid petroleum resin 20%
Adhesion promotes resin 2%
Silane coupler 8%
French chalk 10%
Petroleum tar 10%
Reactive diluent 10%
The B component
Curing agent 95%
Curing agent promoter 5%
This anticorrosive coat reaches following index:
48h cathodic disbonding 7.5mm
3 grades of adhesion
Electrical strength 30MV/m
This embodiment is applicable to pipeline asphalt coating serious aging position, and the surface does not need to carry out to soak and the roasting supervisor of fire as diesel oil, only needs machine treatment that the remaining petroleum tar full scale clearance in surface is fallen to get final product.
Embodiment 2 is by solvent-borne type epoxy polyurethane modified primer, and the filling-modified double-component solventless coatings of the alkaline-resisting screen cloth of glass fibre is done the mesosphere, and glass fiber cloth is made clad.The composition of priming paint and weight proportion are:
A component (is 100% with this component)
E
20 28％
Dimethylbenzene 12%
Petroleum coal resin 14%
Adhesion promotes resin 4%
Silane coupler 4%
French chalk 12%
Petroleum tar 14%
Reactive diluent 10%
Defoamer 2%
The B component
TDI modified firming agent 91%
Curing accelerator 9%
This anticorrosive coat reaches following index:
48h cathodic disbonding 7mm
2.5 grades of adhesion
Electrical strength 30MV/m
Volume resistivity 1 * 10
13Ω m
This embodiment is applicable to the pipeline petroleum tar not serious position of wearing out, and only needs surperficial petroleum tar is rooted out, and can apply.
Embodiment 3 is by the petroleum tar polyurethane primer, and the filling-modified double-component solventless epoxy coating of nylon mesh is done the mesosphere, and glass fiber cloth is made clad.The composition of priming paint and weight proportion are:
A component (is 100% with this component)
Castor oil 40%
Dimethylbenzene 15%
TDI 30％
Adhesion promotes resin 2%
Silane coupler 8%
French chalk 5%
B component (is 100% with this component)
Castor oil 15%
Dimethylbenzene 10%
Petroleum resin 25%
Petroleum tar 35%
Coupling agent 8%
French chalk 7%
This anticorrosive coat reaches following index:
48h cathodic disbonding 8mm
3 grades of adhesion
Electrical strength 30MV/m
Volume resistivity 1.1 * 10
13Ω m
This embodiment is applicable to the pipeline asphalt coating not serious position of wearing out, and only needs top layer petroleum tar is rooted out, and can apply.
As from the foregoing, because the present invention's priming paint belongs to close petroleum tar, be added with silane coupler in the filling paint in mesosphere again, no matter so permeated petroleum tar in the pipeline, or pipe surface residual petroleum tar, priming paint all can have very strong bonding force with it, can be not strict for the surface treatment of being repaiied pipeline yet, surface treatment in other words can be simple, without sand blast, as long as old anticorrosive coat is rooted out; And that the filling paint in mesosphere has with priming paint is compatible preferably, and intermediate layer coating is also bonding with priming paint.The network structure in mesosphere can prevent the trickling of liquid coating well, and applying coating is even, guarantees the construction quality of anticorrosive coat.External coating can avoid foreign material such as sand to enter anticorrosive coat again, has protected anticorrosive coat, has avoided the generation leak source, improves coating quality.Therefore, the present invention constructs simply, and is affected by environment little, and the engineering time shortens, and has reduced engineering cost.
Claims (12)
1. the compound external anti-corrosion layer of pipeline overhaul used of asphalt coating pipeline overhaul, it is characterized in that by the petroleum asphalt modified priming paint of no-solvent type epoxy be stamped the grid structure coating curing framework that forms by nylon mesh or the alkaline-resisting screen cloth of glass fibre and fill that to dose weight ratio in the double-component solventless epoxy coating again be the modified bi-component solventless epoxy coating that 2 ~ 4% silane coupler forms, outermost surface is the external protection coating of cover glass fibre cloth again.
2. the compound external anti-corrosion layer of pipeline overhaul according to claim 1 is characterized in that the petroleum asphalt modified priming paint of described no-solvent type epoxy is synthetic by A, B double-component, and wherein the A component is by E
44Epoxy resin, liquid petroleum resin, adhesion promote resin, silane coupler, French chalk, petroleum tar and reactive diluent to form; The B component is made up of curing agent and curing accelerator.
3. the compound external anti-corrosion layer of pipeline overhaul according to claim 2 is characterized in that the composition of the petroleum asphalt modified priming paint of described no-solvent type epoxy is by weight ratio:
The A component:
E
44Epoxy resin 30 ~ 50%
Liquid petroleum resin 15 ~ 30%
Adhesion promotes resin 1 ~ 2%
Silane coupler 4 ~ 8%
French chalk 10 ~ 20%
Petroleum tar 10 ~ 20%
Reactive diluent 10 ~ 20%
The B component
Curing agent 80 ~ 83%
Curing agent promoter 17 ~ 20%
4. the compound external anti-corrosion layer of pipeline overhaul according to claim 1 is characterized in that the thickness of described mesosphere coating curing framework is 0.5 ~ 1mm, and mesh is of a size of 2 * 2 ~ 4 * 4mm.
5. the compound external anti-corrosion layer of pipeline overhaul used of asphalt coating pipeline overhaul, it is characterized in that by solvent-borne type epoxy polyurethane modified primer be stamped the grid structure coating curing framework that forms by nylon mesh or the alkaline-resisting screen cloth of glass fibre and fill that to dose weight ratio in the double-component solventless epoxy coating again be the modified bi-component solventless epoxy coating that 2 ~ 4% silane coupler forms, outermost surface is the external protection coating of cover glass fibre cloth again.
6. the compound external anti-corrosion layer of pipeline overhaul according to claim 5 is characterized in that described solvent-borne type epoxy polyurethane modified primer is synthetic by A, B double-component, and wherein the A component is by E
20, dimethylbenzene, petroleum coal resin, adhesion promotes resin, silane coupler, French chalk, petroleum tar, reactive diluent and defoamer to form, the B component is made up of TDI modified firming agent and curing accelerator.
7, the compound external anti-corrosion layer of pipeline overhaul according to claim 6 is characterized in that described solvent-borne type epoxy polyurethane modified primer composition proportion by weight is:
The A component
E
20 20~40％
Dimethylbenzene 20 ~ 25%
Petroleum coal resin 10 ~ 20%
Adhesion promotes resin 2 ~ 4%
Silane coupler 8 ~ 10%
French chalk 10 ~ 15%
Petroleum tar 5 ~ 10%
Reactive diluent 4 ~ 10%
Defoamer 1 ~ 2%
The B component
TDI modified firming agent 89 ~ 91%
Curing accelerator 9 ~ 11%
8. the compound external anti-corrosion layer of pipeline overhaul according to claim 5 is characterized in that the thickness of described mesosphere coating curing framework is 0.5 ~ 1mm, and mesh is of a size of 2 * 2 ~ 4 * 4mm.
9. the compound external anti-corrosion layer of pipeline overhaul used of asphalt coating pipeline overhaul, it is characterized in that by the petroleum tar polyurethane primer be stamped the grid structure coating curing framework that forms by nylon mesh or the alkaline-resisting screen cloth of glass fibre and fill that to dose weight ratio in the double-component solventless epoxy coating again be the modified bi-component solventless epoxy coating that 2 ~ 4% silane coupler forms, outermost surface is the external protection coating of cover glass fibre cloth again.
10. the compound external anti-corrosion layer of pipeline overhaul according to claim 9, it is characterized in that described petroleum tar polyurethane primer is synthetic by A, B double-component, wherein the A component promotes resin, silane coupler and French chalk to form by castor oil, dimethylbenzene, TDI, adhesion; The B component is made up of castor oil, dimethylbenzene, petroleum resin, petroleum tar, coupling agent and French chalk.
11. the compound external anti-corrosion layer of pipeline overhaul according to claim 10 is characterized in that described petroleum tar polyurethane primer composition proportion by weight is:
The A component
Castor oil 40 ~ 50%
Dimethylbenzene 10 ~ 20%
TDI 30~40％
Adhesion promotes resin 1 ~ 2%
Silane coupler 8 ~ 12%
French chalk 5 ~ 10%
The B component
Castor oil 10 ~ 20%
Dimethylbenzene 5 ~ 10%
Petroleum resin 20 ~ 30%
Petroleum tar 30 ~ 40%
Coupling agent 2 ~ 8%
French chalk 20 ~ 33%
12. the compound external anti-corrosion layer of pipeline overhaul according to claim 9 is characterized in that the thickness of described mesosphere coating curing framework is 0.5 ~ 1mm, mesh is of a size of 2 * 2 ~ 4 * 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03157543 CN1262785C (en) | 2003-09-24 | 2003-09-24 | Composite outer anti corrosive coating in use for heavy repair of pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03157543 CN1262785C (en) | 2003-09-24 | 2003-09-24 | Composite outer anti corrosive coating in use for heavy repair of pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1601169A CN1601169A (en) | 2005-03-30 |
| CN1262785C true CN1262785C (en) | 2006-07-05 |
Family
ID=34660350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03157543 Expired - Lifetime CN1262785C (en) | 2003-09-24 | 2003-09-24 | Composite outer anti corrosive coating in use for heavy repair of pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1262785C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451428C (en) * | 2007-07-13 | 2009-01-14 | 天津市巨星防腐检测工程有限公司 | Method for repairing and reinforcing corrosive pipeline by using multilaminar high strength composite materials |
| CN101100583B (en) * | 2007-07-26 | 2010-05-19 | 常州光辉化工有限公司 | High-adhesion ultraviolet radiation polyurethane double-solidifying carpentry paint and preparation method thereof |
| CN101942265B (en) * | 2010-09-07 | 2012-08-15 | 天津中油渤星工程科技有限公司 | Epoxy coal asphalt anti-corrosion paint and manufacturing method |
| CN102297319B (en) * | 2011-08-05 | 2012-12-05 | 新兴铸管股份有限公司 | Anti-corrosive inner lining with composite coating and application thereof |
| CN102297317B (en) * | 2011-08-05 | 2013-03-06 | 新兴铸管股份有限公司 | Composite anti-corrosive inner lining with water-based epoxy paint covering layer and application thereof |
| CN102297318B (en) * | 2011-08-05 | 2012-12-05 | 新兴铸管股份有限公司 | Compound antisepsis inner lining containing low-viscosity epoxy coating sealing layer and application thereof |
| CN103351813B (en) * | 2013-07-09 | 2016-04-13 | 杨林江 | A kind of bitumastic and preparation method thereof |
| CN105694662B (en) * | 2014-11-27 | 2018-05-11 | 中国石油天然气集团公司 | A kind of solvent-free epoxy coal tar anticorrosive paint and its preparation method and application |
| CN107559538A (en) * | 2017-09-29 | 2018-01-09 | 江苏天时新材料科技有限公司 | Double-decker anticorrosive coat |
| CN107794764A (en) * | 2017-10-27 | 2018-03-13 | 邹亚静 | A kind of nanofiber enhancing anticorrosive paint and preparation method thereof |
| CN108546549B (en) * | 2018-05-07 | 2020-07-28 | 谢翠娥 | Preparation method and construction method of casing pipe repairing and reinforcing agent |
| CN109280320B (en) * | 2018-08-14 | 2020-09-11 | 湖南鑫长胜材料科技有限公司 | Reaction type normal temperature color asphalt and preparation method and application thereof |
-
2003
- 2003-09-24 CN CN 03157543 patent/CN1262785C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1601169A (en) | 2005-03-30 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20211110 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Address before: Intercontinental building, 16 ande Road, Dongcheng District, Beijing 100011 Patentee before: PETROCHINA Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20060705 |