CN202176878U - Ductile cast iron pipe with waterproof protective layer - Google Patents
Ductile cast iron pipe with waterproof protective layer Download PDFInfo
- Publication number
- CN202176878U CN202176878U CN2011203035663U CN201120303566U CN202176878U CN 202176878 U CN202176878 U CN 202176878U CN 2011203035663 U CN2011203035663 U CN 2011203035663U CN 201120303566 U CN201120303566 U CN 201120303566U CN 202176878 U CN202176878 U CN 202176878U
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- protective layer
- iron pipe
- cast iron
- ductile cast
- zinc
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Abstract
The utility model discloses a ductile cast iron pipe with a waterproof protective layer. A zinc protective layer, a stainless steel protective layer and a sealing anticorrosion protective layer are sequentially arranged from inside to outside on the outer surface of a base body of the ductile cast iron pipe. The ductile cast iron pipe with the waterproof protective layer has the advantages that by means of an arc spraying method, the zinc protective layer, the stainless steel protective layer and the sealing anticorrosion protective layer are sequentially sprayed on the periphery of the ductile cast iron pipe, so an anode loss protection function of the zinc protective layer, abrasion resistance and corrosion resistance of the stainless steel protective layer and hole sealing corrosion inhibition performance of the sealing anticorrosion protective layer can be coordinately performed, and the ductile cast iron pipe can be protected efficiently. The ductile cast iron pipe with such a coating structure has good corrosion resistance performance under irrigation work environments. The waterproof protective layer has clean and tidy appearance, uniform and dense coating, long protection cycle, good corrosion resistance and strong destructiveness resistance. No secondary digging construction is required, and cost of project service life is remarkably reduced.
Description
Technical field
The utility model relates to a kind of ductile iron pipe with waterproof protecting layer, is applicable to the ductile iron pipe of laying under the water conservancy project environment.
Background technique
All the time, ductile iron pipe is to add the sealing corrosion protective covering as the composite protective system with the zinc protective layer, and this is the protective system that a kind of sacrificial anode adds cathodic protection, has anticorrosion year limit for length's advantage, is used widely all over the world.But, in the pipe installation process, receive the river sometimes and stop; The riverbed is established and crossed over to the ductile iron pipe of the above-mentioned protection system of common in the past employing bed along the river, and this ductile iron pipe receives the impact of current and sandstone for a long time, and corrosion is very fast; The construction experience of decades proves that the water conservancy project environment protection period of spray zinc technology ductile iron pipe down is about 15 years, and its advantage is the antiseptic property reliable and stable; Respond well, anti-permeability is strong, and shortcoming is that surface hardness is relatively poor; Wear resistance is not enough, a little less than the anti-destructive.
In addition, show that according to domestic and international interrelated data the protection period of stainless protection layer is about 45 years; Its advantage is that hardness is high, and wear resistance is good, and intensity is big; Anti-destructive is good, and shortcoming is that the anticorrosion with painting effect is relatively poor, easy-to-rust, no cathodic protection function, and rough surface, water permeability are strong; It is poor to cover density, is prone to peel off.
The model utility content
The utility model technical problem to be solved provide a kind of with the zinc protective layer add stainless protection layer add the sealing corrosion protective covering ductile iron pipe, guarantee that ductile iron pipe has good antiseptic property and wear resistance.
For solving the problems of the technologies described above; The technological scheme that the utility model is taked is: a kind of ductile iron pipe with waterproof protecting layer is provided with zinc protective layer, stainless protection layer and sealing corrosion protective covering from inside to outside successively at the outer surface of ductile iron pipe matrix.
The stainless steel of said stainless protection layer is 316L stainless steel, 304 stainless steels or nickel-base alloy; The material of said sealing corrosion protective covering is solvent-borne type material or powder coating, and coating thickness is 70-140 μ m; The weight per unit area of said zinc protective layer and stainless protection layer is 130-200g/m
2, its coating thickness is respectively 60-100 μ m.
Said solvent-borne type material is paint, bituminous paint or solvent epoxy varnish coating; Said powder coating is epoxy powder coating, polyester powder coating or polyester epoxy powder coating.
Adopt the beneficial effect that technique scheme produced to be: to spray the zinc protective layer earlier at the spheroidal graphite cast iron tube outer surface through adopting arc spray process; Spray stainless protection layer above that again; The corrosion protective covering of spraying sealing at last; Can coordinate to bring into play the galvanic anode protection protective function of zinc protective layer, the wear and corrosion behavior of stainless steel coating and the sealing of hole corrosion inhibition of seal coat, make spheroidal graphite cast iron be in control good protection, the ductile iron pipe of this coating structure has good corrosion resistance under the water conservancy project environment; The waterproof protecting layer outward appearance is clean and tidy, covering is even, closely knit; Its protection period is long, antiseptic property good, anti-destructive is strong, need not organize the secondary excavation construction, has significantly reduced the engineering life cycle cost.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is the sectional view of the ductile iron pipe of the utility model coating structure;
Wherein, 1, the ductile iron pipe matrix, 2, the zinc protective layer, 3, stainless protection layer, 4, sealing corrosion protective covering.
Embodiment
Embodiment as shown in Figure 1 can know, the described a kind of ductile iron pipe with waterproof protecting layer of the utility model is provided with zinc protective layer 2, stainless protection layer 3 and sealing corrosion protective covering 4 from inside to outside successively in the periphery of ductile iron pipe matrix 1.
Its production craft step is following:
(1) surface treatment: at first ball blast sandblast power is provided by air compressor; In shot blast room, even-grained iron sand under compressed-air actuated effect, high speed impact spheroidal graphite cast iron tube-surface; The oxides such as iron rust of matrix surface have been removed; Reach the Sa2.5 level, thoroughly descaling, splashings, stick up skin, oil, fat, pitch, rusty stain etc., the surface of a cleaning is provided for sprayfused coating.Spray with interior being no more than 4 hours behind the ball blast; Pressurized air with nitrogen or dried and clean before the spraying purges the spheroidal graphite cast iron tube outer surface; Remove impurity such as floating ash, in a word, before spraying; Pipeline surface to be painted does not allow any foreign material such as moisture, grease, dust, to avoid the disturbing factor of unclean surface.
(2) thermal spraying zinc protective layer: capital equipment is a compressed air system; The electric-arc thermal spray coating equipment that the electric-arc thermal spray coating equipment choosing is made up of high-power spraying source, paint spray gun, wire feeder, air compressor, control box sprays as adopting WDP2000-IV type arc-spraying machine.
Under drive unit and the effect of arc spraying system power supply, zinc silk starting the arc burning becomes molten mass, makes it to be atomized into particulate and is ejected into the spheroidal graphite cast iron tube-surface by pressurized air simultaneously, forms the zinc protective layer; Because the matrix surface after the sandblast is uneven, the metallic coating after heat radiation is shunk can be adsorbed on the spheroidal graphite cast iron tube-surface securely.
Above-mentioned zinc filament diameter is 2.0-4.0mm, and purity is 99.99%, and fusing point is 420 ℃.The outward appearance look vivid, and circularity is even, the no burr in surface, no marking, non-scale.
The spray parameters of zinc protective layer is:
(3) thermal spraying stainless protection layer: arc pistol is fixed on the spraying dolly; Arc pistol at the uniform velocity goes along the ductile iron pipe axial surface under the drive of spraying dolly, is installed to two Stainless Steel Wires in the arc pistol, opens arc pistol; Stainless Steel Wire burning becoming molten mass; Simultaneously make it to be atomized into particulate, and evenly spray to the spheroidal graphite cast iron tube-surface of high speed rotating, form stainless protection layer by pressurized air.
Adopt the metal wire material of 304 Stainless Steel Alloy silks as thermal spraying, diameter wiry is 2.0-4.0mm.
The spray parameters of stainless protection layer is:
(4) be coated with the sealing corrosion protective covering: in the surface of the stainless protection layer of ductile iron pipe periphery spraying epoxy coating coating.
Claims (2)
1. the ductile iron pipe with waterproof protecting layer is characterized in that, is provided with zinc protective layer (2), stainless protection layer (3) and sealing corrosion protective covering (4) from inside to outside successively in the periphery of ductile iron pipe matrix (1).
2. a kind of ductile iron pipe with waterproof protecting layer according to claim 1 is characterized in that, the stainless steel of said stainless protection layer is 316L stainless steel, 304 stainless steels or nickel-base alloy; The material of said sealing corrosion protective covering is solvent-borne type material or powder coating, and coating thickness is 70-140 μ m; The weight per unit area of said zinc protective layer and stainless protection layer is 130-200g/m
2, its coating thickness is respectively 60-100 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203035663U CN202176878U (en) | 2011-08-19 | 2011-08-19 | Ductile cast iron pipe with waterproof protective layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203035663U CN202176878U (en) | 2011-08-19 | 2011-08-19 | Ductile cast iron pipe with waterproof protective layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202176878U true CN202176878U (en) | 2012-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203035663U Expired - Fee Related CN202176878U (en) | 2011-08-19 | 2011-08-19 | Ductile cast iron pipe with waterproof protective layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202176878U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278568A (en) * | 2011-08-19 | 2011-12-14 | 新兴铸管股份有限公司 | Ductile cast iron pipe with waterproof protective layer and production process thereof |
| CN103233218A (en) * | 2013-04-27 | 2013-08-07 | 宁波科鑫腐蚀控制工程有限公司 | Zinc and epoxy double coating reinforcing steel bar |
| CN104736915A (en) * | 2012-08-06 | 2015-06-24 | 圣戈班穆松桥 | Pipe member made from iron for a buried pipeline, comprising an outer coating |
| CN106795634A (en) * | 2014-05-12 | 2017-05-31 | 蒂森克虏伯钢铁欧洲股份公司 | Manufacture is provided with the method and steel member of the steel member of the corrosion protective layer of metal |
-
2011
- 2011-08-19 CN CN2011203035663U patent/CN202176878U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278568A (en) * | 2011-08-19 | 2011-12-14 | 新兴铸管股份有限公司 | Ductile cast iron pipe with waterproof protective layer and production process thereof |
| CN104736915A (en) * | 2012-08-06 | 2015-06-24 | 圣戈班穆松桥 | Pipe member made from iron for a buried pipeline, comprising an outer coating |
| CN104736915B (en) * | 2012-08-06 | 2017-03-08 | 圣戈班穆松桥 | There is the buried pipe iron pipe element of external coating |
| CN103233218A (en) * | 2013-04-27 | 2013-08-07 | 宁波科鑫腐蚀控制工程有限公司 | Zinc and epoxy double coating reinforcing steel bar |
| CN106795634A (en) * | 2014-05-12 | 2017-05-31 | 蒂森克虏伯钢铁欧洲股份公司 | Manufacture is provided with the method and steel member of the steel member of the corrosion protective layer of metal |
| US10704112B2 (en) | 2014-05-12 | 2020-07-07 | Thyssenkrupp Steel Europe Ag | Method for producing a steel component which is provided with a corrosion-resistant metal coating, and steel component |
| CN106795634B (en) * | 2014-05-12 | 2021-04-30 | 蒂森克虏伯钢铁欧洲股份公司 | Method for producing a steel component provided with a metallic corrosion protection layer, and steel component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120328 Termination date: 20150819 |
|
| EXPY | Termination of patent right or utility model |