CN1197904A - Corrosion protection coating system and method for exterior surface of pipes and associated equipment - Google Patents
Corrosion protection coating system and method for exterior surface of pipes and associated equipment Download PDFInfo
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- CN1197904A CN1197904A CN 98107850 CN98107850A CN1197904A CN 1197904 A CN1197904 A CN 1197904A CN 98107850 CN98107850 CN 98107850 CN 98107850 A CN98107850 A CN 98107850A CN 1197904 A CN1197904 A CN 1197904A
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Abstract
The improved coating system and method of the present invention provides corrosion protection coat for exterior surface of pipes or associated equipments such as bending channel, T-shape pipe or valve. The corrosion protection coat includes a spraying aluminum or zinc or their alloy layer, a bonding material and a polythene wrappage layer. The exterior surface of the pipe is first sprayed with aluminum or zinc or their alloy layer, and then the sprayed metal is coated with the bonding material, and the bonding material is coated by the polythene.
Description
The present invention relates to a kind of improved anti-corrosion protection system, the present invention relates more specifically to a kind of anti-corrosion protection system that is used for pipeline or relevant device outer surface.
In order to protect pipeline, do not corroded especially for the outer surface of hydrocarbon conveyance conduit, the outer surface of reply pipeline or relevant device applies.For example, the outer surface of steel pipe when using out of doors, is protected with one or more different coating usually, and this cladding material can be selected to compound organic adhesive at single coal tar oil.
Recently, the bond vitrified epoxy adhesive is selected as the uncorroded cladding material of protection pipeline external surface.Regrettably, it is comparatively expensive to have the pipeline of bond vitrified epoxy adhesive or a relevant device external surface coating price.The major part of this expense is with relevant with the structure of the necessary special producing equipment of bond vitrified epoxy adhesive coating pipeline.When not having bond vitrified epoxy adhesive coating device, the installation of hydrocarbon conveyance conduit and relevant device thereof need be stopped until building up bond vitrified epoxy adhesive coating device.
When setting up the pipeline that scribbles the bond vitrified epoxy adhesive, during assigned position is carried, can cause bond vitrified epoxy adhesive overlay to damage at coated pipeline with long distance.In case bond vitrified epoxy adhesive overlay is damaged, must repair bond vitrified epoxy adhesive overlay again to be suitable for protecting pipeline not corroded.Therefore; low, the effective anti-corrosion protection system and method for a kind of cost of technical needs is protected pipeline and relevant device; this method and apparatus is easy to the in-place coating corrosion protective covering, thereby can eliminate the defective of damaging in the course of conveying, can avoid building the requirement of special coating device again.
The invention provides a kind of cheapness that is used to protect pipeline and relevant device, effective anti-corrosion protection system and method, this system and method can be easy to the in-place coating corrosion protective covering.
In the system and method for the present invention, at first spray pipeline external surface with any of one of alloy commonly used of aluminium or zinc or its these metals.Applied adhesives or sticky material on the metalizing subsequently.On binder or sticky material, use the polyethylene extrudate afterwards.In alternate embodiments, can use polyethylene tape with binder bottom.
With reference to following description and relevant drawings, will be better understood other characteristics, aspect and advantage in the anti-corrosion protection system and method for the present invention.
The pipeline isometric view of Fig. 1 for being protected by improvement coating of the present invention;
The viewgraph of cross-section of Fig. 2 for cutting open along pipeline shown in Fig. 1 center line 2-2;
Fig. 3 is for carrying out the isometric view of metal spraying to pipeline;
Fig. 4 is behind the polyethylene tape parcel, uses the isometric view of binder adhesive tape;
Fig. 5 is for using the isometric view of adhesive coating and polyethylene extrudate;
Fig. 6 is the most preferred embodiment block diagram of realization anti-corrosion protection of the present invention system.
The present invention is an a kind of improved anti-corrosion protection system; this system can be used to protect the outer surface of pipeline and other equipment, and as illustrated in fig. 1 and 2, pipeline 10 outer surfaces of anti-corrosion protection of the present invention system have a metalizing layer 14; one binder or sticker layer 16, and an outer polyethylene coating 18.
The desired metallic that is sprayed at exposed pipeline 100 outer surfaces 12 can adopt aluminium or zinc or both metal alloys.Because the selfsealings characteristic of these metals and alloy oxidation layer thereof and the ability of cathodic protection protection can be provided for metal tube, thereby select this two kinds of metals.Have been found that aluminum and zinc and alloy thereof can form the not acrid patina of parent metal pipe 100 so if take all factors into consideration anti-corrosion protection systematic entirety of the present invention.
Metal such as aluminium, the thermal spraying of zinc or its alloy, can utilize (a) to be commonly called the burning wire processing (combustion wire process) of " flame spraying ", (b) combustion powder processing (combustion powder process)), or (c) arc wire processing (arc wire porocess) these metal spraying technologies at first should melt the metallic material that is sprayed, and the melt granules of metalizing is impacted in the basic unit.In the present invention, described basic unit is pipeline or relevant device such as bend, the outer surface of T shape pipe or valve body.
With the tackiness agent or the binder 16 that are applied on the metalizing layer 14 polyethylene external coating 18 is fixed on the metalizing layer 14.According to used tackiness agent 16 kinds, this tackiness agent 16 can adopt " heat " or " cold " type.Known have enough cohesions polyethylene clad 18 is securely fixed in multiple other the binder composition on the metalizing 14, has been well known to those of ordinary skill in the art.The thickness of binder or sticker layer 16 and particular chemical composition are that external coating 18 selected polyethylene kinds are determined by coated pipeline 10 applied environment and user.
In most preferred embodiment, for external coating 18 selected materials are polyethylene.But those of ordinary skills should understand, without departing from the present invention, can use multiple material to external coating 18.By this embodiment, these other materials can comprise the coal tar oil that sprays, coal tar oil, urethane and fusing gummed epoxy adhesive.Also can adopt extraordinary plasticity or nonplastic, the organic or inorganic composite, the kind and the grade that are used for the material of skin 18 should be determined according to employed place of pipeline and climatic environment.Selected tackiness agent 16 should form essential combination at the storeroom of metalizing layer 14 and formation outer 18.
When the protection equipment relevant,, when T shape pipe or valve body, must prepare molten polyethylene especially so that on adhesives layer 16, use as bend with pipeline.
Be used for corrosion protective covering is applied to method such as Fig. 3 of pipeline outer-layer 12, shown in 4 and 5.In Fig. 3, thermal spraying aluminum, the basic unit 14 of zinc or its alloy utilizes tratitional technology to apply.Find, rotate exposed pipeline 100 and can obtain satisfactory coating 104 by fixing spray-coating apparatus 102.
Then, a binder or sticker layer 16 are arranged on the metalizing layer 14.The skin 18 that coating is formed by polyethylene or analog material on binder or sticker layer 16.As shown in Figure 4, adhesives layer 16 and polyethylene or analog material layer 18 can all apply with the adhesive tape form.Tape width, the selected of thickness and density should be suitable for special operational.As shown in Figure 5, available polyethylene extrudate 28 is come instead of adhesive tape, but and available coating adhesive 26 come the instead of adhesive tape binder.
As shown in Figure 6, at first heat and the outer surface that cleans exposed pipeline 100 helps to realize suitable binder and improves the method that the metalizing layer adheres to.This cleaning is finished by sandblast processing (blastingprocess) or with wheelabrator (Wheelabrator).As shown in Figure 3, metal spraying should be produced minimum defective to the heating power that rotates clean pipeline 100, thereby provide cathodic protection for pipeline better.
In case after the basic unit 14 of metalizing was coated, pipeline 100 can be heated once more to help the coating of sticker layer 16.For realize and hot active sticky material between maximum bonded, should when binder 16 still is in hot state, just apply polyethylene coating 18.
After adhesives layer 16 coating, polyethylene 18 can adhesive tape be applied in and rotates pipeline or be applied on the static pipeline with extrudate.In most preferred embodiment, coated pipeline 10 is cooled and is detected before inserting pipeline.Great advantage of the present invention is all cleanings, applies, and metal spraying, binder applies and the equipment of polyethylene coating can be placed on a series of flatcars.Subsequently.This group shot can be transported to the job site of " scene " anti-corrosion protection that is used for pipeline and relevant device.
Can allow to be used for the coating of girth welding and " groove skin (over-the-ditch) " use to the further improvement of equipment.
The invention provides a kind of system and method that is used for pipeline external surface is carried out coating.Without departing from the present invention, can make various improvement to pipeline coatings of the present invention system.These variations should fall into the protection domain of claims.
Claims (25)
1, a kind of anti-corrosion protection coating that is used for pipeline or relevant device outer surface comprises:
One acts on the metalizing layer of pipeline or relevant device outer surface, and described metal should be from aluminium, selected in zinc or its alloy;
One acts on the bonding material layer of described metalizing layer;
One acts on the polyethylene layer of described bonding material layer.
2, the anti-corrosion protection coating that is used for pipeline or relevant device outer surface according to claim 1, it is characterized in that: described polyethylene layer is the adhesive tape wrappage.
3, the anti-corrosion protection coating that is used for pipeline or relevant device outer surface according to claim 1 is characterized in that: described bonding material layer adopts the form of adhesive tape wrappage.
4, the anti-corrosion protection coating that is used for pipeline or relevant device outer surface according to claim 1 is characterized in that: described polyethylene layer is extrudate (extrusion).
5, the anti-corrosion protection coating that is used for pipeline or relevant device outer surface according to claim 1, it is characterized in that: described bonding material layer can be by heat fusing.
6, the anti-corrosion protection coating that is used for pipeline or relevant device outer surface according to claim 1 is characterized in that: utilize the flame spraying to apply described metal layer.
7, a kind of corroding method that prevents pipeline or relevant device outer surface may further comprise the steps:
(a) with the outer surface of spray deposit at described pipeline, described metal should be from aluminium, and is selected in zinc or its alloy;
(b) apply described metalizing layer with bonding material layer;
(c) at described bonding material layer coating polyethylene layer.
8, the corroding method that prevents pipeline or relevant device outer surface according to claim 7, it is characterized in that: described polyethylene layer is the adhesive tape wrappage.
9, the method that is used for the anti-corrosion protection coating of pipeline or relevant device outer surface according to claim 8, it is characterized in that: described binding material is coated with described polyethylene coating.
10, the method that is used for the anti-corrosion protection coating of pipeline or relevant device outer surface according to claim 7 is characterized in that: described polyethylene layer is extrudate (extrusion).
11, the method that is used for the anti-corrosion protection coating of pipeline or relevant device outer surface according to claim 7 is characterized in that: utilize the flame spraying to apply described metal layer.
12, the method that is used for the anti-corrosion protection coating of pipeline or relevant device outer surface according to claim 7, this method also comprises: in step (a) with the heating pipe (b) or the step of relevant device outer surface.
13, a kind of being used for comprises to the system of pipeline or relevant device outer surface coating corrosion protective covering:
Be used for the device to pipeline external surface metalizing layer, described metal should be from aluminium, and is selected in zinc or its alloy;
Be used to make described bonding component to be deposited on device on the layer of described metalizing; And
Be used for device at described bonding component coating polyethylene layer.
14, the system that is used for to pipeline or relevant device outer surface coating corrosion protective covering according to claim 13 is characterized in that: the described device that is used to spray described metal layer is the flame cartridge.
15, the system that is used for to pipeline or relevant device outer surface coating corrosion protective covering according to claim 13, it is characterized in that: being used for the described described device that is bonded to layering of polyethylene coated is adhesive tape parcel element.
16, the system that is used for to pipeline or relevant device outer surface coating corrosion protective covering according to claim 15 is characterized in that: described Bond is deposited on the layer of described metalizing, as the bottom of described polyethylene wrappage.
17, the system that is used for to pipeline or relevant device outer surface coating corrosion protective covering according to claim 13; this system also comprises: after spraying described metalizing layer and deposit described be bonded to layering before, be used to heat the device of described pipeline external surface.
18, the system that is used for to pipeline or relevant device outer surface coating corrosion protective covering according to claim 13; this system also comprises: before described metalizing layer is sprayed on pipeline or relevant device outer surface, be used to clean the device of described pipeline external surface.
19, the system that is used for to pipeline or relevant device outer surface coating corrosion protective covering according to claim 13; this system also comprises: before a metalizing layer is sprayed on pipeline or relevant device outer surface; be used to clean the device of described pipeline external surface; and after the layer of the described metalizing of spraying, be used to heat the device of described pipeline external surface.
20, a kind of anti-corrosion protection metal tube comprises:
One metal tube;
One acts on the metalizing layer of described metal tube outer surface, and described metal should be from aluminium, selected in zinc or its alloy;
One acts on the bonding material layer of described metalizing layer; And
One acts on the polyethylene layer of described bonding material layer.
21, anti-corrosion protection metal tube according to claim 20 is characterized in that: described polyethylene layer is the adhesive tape wrappage.
22, anti-corrosion protection metal tube according to claim 20 is characterized in that: use described bonding material layer with adhesive tape wrappage form.
23, anti-corrosion protection metal tube according to claim 20 is characterized in that: utilize the flame spraying to apply described metal layer.
24, anti-corrosion protection metal tube according to claim 20 is characterized in that: described binding material is coated with described polyethylene coating.
25, anti-corrosion protection metal tube according to claim 20 is characterized in that: described polyethylene layer is extrudate (extrusion).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US835,006 | 1986-02-28 | ||
| US83500697A | 1997-04-07 | 1997-04-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1197904A true CN1197904A (en) | 1998-11-04 |
Family
ID=25268336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98107850 Pending CN1197904A (en) | 1997-04-07 | 1998-04-07 | Corrosion protection coating system and method for exterior surface of pipes and associated equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1197904A (en) |
| ID (1) | ID20542A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8709200B2 (en) | 2009-01-20 | 2014-04-29 | Tesa Se | Method for corrosion protection treatment |
-
1998
- 1998-04-07 CN CN 98107850 patent/CN1197904A/en active Pending
- 1998-04-08 ID IDP980527A patent/ID20542A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8709200B2 (en) | 2009-01-20 | 2014-04-29 | Tesa Se | Method for corrosion protection treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| ID20542A (en) | 1999-01-07 |
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