CN203371858U - Anticorrosion composite coating structure used for welding seam of steel structures - Google Patents
Anticorrosion composite coating structure used for welding seam of steel structures Download PDFInfo
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- CN203371858U CN203371858U CN201320186942.4U CN201320186942U CN203371858U CN 203371858 U CN203371858 U CN 203371858U CN 201320186942 U CN201320186942 U CN 201320186942U CN 203371858 U CN203371858 U CN 203371858U
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Abstract
The utility model discloses an anticorrosion composite coating structure used for welding seam of steel structures, and belongs to the technical field of coating protection engineering. In the composite coating structure, a rare earth modified node type metal coating is sprayed thermally on a welding seam surface which is sandblast treated or pellet treated; and a nano modified epoxy sealing paint coating, an epoxy micaceous iron oxide intermediate paint coating, and a polyurethane finishing paint coating or a fluorine carbon finishing paint coating are adhered on the rare earth modified node type metal coating from internal to external in sequence. The anticorrosion composite coating structure which is capable of carrying out anticorrosion protection for welding seam of steel structures, has advantages of being simple in structure, being excellent is anticorrosion protection ability, being capable of guaranteeing anticorrosion protection quality and usage life of an entire steel structure engineering, and being wide in popularization practicality.
Description
Technical field
The utility model relates to a kind of metal composite coating structure, especially a kind of anticorrosive composite coating structure that is applicable to the Steel Structure Weld of protective coating field of engineering technology use.
Background technology
Along with the continuous fast development of China's economic construction and national economy, steel construction is applied in the industry such as bridge, harbour, communications and transportation, water conservancy projects, offshore platform and civil engineering more and more; Yet the corrosion of steel construction has caused huge loss and harm to the national economy of countries in the world and the people's life, the anticorrosive work of therefore carrying out steel construction also seems more and more important.At present, a lot of work of having done is studied carefully for the anticorrosion of large steel space truss engineering by China, and also has a lot of problems at the weld seam of steel construction aspect anticorrosion.As everyone knows, welding is the fundamental technology of manufacture of steel structure, and it is directly connected to use value, safety in production and the economic benefit of structural steelwork.The anticorrosion relationship between quality of steel construction piece weld seam is to anticorrosion quality and the service life of whole structural steelwork, and the anticorrosion of Steel Structure Weld position is also the weakest position in whole corrosion-inhibiting coating.
Because the heat affected area produced in weld metal when the welded steel structure and welding process and fusion process cause metal ingredient and the small difference of microstructure on the weld seam tangent plane, be easy to cause electrochemical corrosion.In addition, the welding position metallurgical structure changes, the factor such as residual stress and weld defect all can affect the etching characteristic of welded unit.But a lot of scientific workers have ignored a lot of problems that occur as factors such as stress corrosion, electric corner burn into crevice corrosions because occurring in welding process.Along with scientific and technical development, more and more obtain people's attention for the importance of structural steelwork anticorrosive coating technique, and control and also become gradually the pith of coating process for the anticorrosion of Steel Structure Weld.
The steel construction piece of general large-scale steel structure engineering, all at factory's segmental machining and anticorrosive coating, then welds to scene again and is assembled into whole bridge.Because Anticorrosion Construction belongs to concealed work, after application, be difficult to find the quality problems heart, and the corrosion of Steel Structure Weld be have destructive, once the corrosion accident will be surprising! Therefore in the structural steelwork building course, carry out the anticorrosion quality control work of Steel Structure Weld, for guaranteeing that construction quality and safety are all significant.
At present, relevant weld seam corrosion-resistant report mostly is the attachment weld protection of pipeline.Be used widely aspect organic coating, inorganic coating and polymer inner liner etc. are anticorrosion in petroleum pipeline, but the high temperature action during due to on-the-spot welding, can make near the protective coating weld seam both sides burn or come off, thereby lose the protective effect to pipeline.For this situation, both at home and abroad to the safeguard measure of the main connected mode of inner anticorrosioning coating pipeline and mouth of pipe junction mainly contain automatic joint machine method, mechanical connection method, inner lining protection cover (pipe) welding, memorial alloy overlap method, stainless joint method, without the internal joint patch technology etc.The people such as Xiao Ye have analyzed the applicable cases of 3-tier architecture polyethylene anticorrosive coating (3PE) in pipeline corrosion protection, point out that this anticorrosive coat has good anticorrosion, tough and tensile and durable serviceability, but the attenuate at the commissure anticorrosive coat can't be eliminated, and there is hidden danger in place at the circumferential welded seam repaired mouth, and proposed the shortcoming that a kind of spray polyurea anticorrosive coat improves polyethylene anticorrosive coating, yet the large-scale application of carbamide paint is limited by price, coating processes and stores up the restriction of maintenance.The formpiston that Chinese patent CN101846229A has introduced in the anticorrosion solid strong method of a kind of pipe welding seam and the method melts agent, solid injection slurries and melts admittedly strong slurries.The method is by the pipe welding seam zone, with melting after material coats weld seam, forming the formpiston that can be melted, then stick with paste to paste after fast gel material coats formpiston fully outside formpiston and form former, after former solidifies, the formpiston that reinjects melts agent and melts formpiston, after the liquid that formpiston melts, also discharge is melted, the occupied space of formpiston has just formed empty die cavity, injecting solid injection slurries in last past die cavity is full of die cavity to tamp, Gu remove former, application after the injection slurries solidify, complete and apply.Chinese patent CN102900155A has introduced a kind of electric transmission line concrete pole weld seam anti-corrosion protection method; the method is utilized the protective device with the upper-lower seal circle that internal diameter is identical with concrete bar external diameter; in order to isolate extraneous various corrosive gas, ultraviolet ray and frost rainwater, electric transmission line concrete pole weld seam and weld heat-affected zone corrosion of metal are destroyed, promote the Corrosion Protection of concrete bar.This invention is obvious to the anticorrosion ability of electric transmission line concrete pole weld seam and weld heat-affected zone metal, can effectively prevent concrete bar weld corrosion cracking and causes electric transmission line concrete pole to fall bar.Yet, about the Steel Structure Weld corrosion-resistant is studied and reports seldom.
Summary of the invention
The purpose of this utility model is the deficiency that overcomes prior art, propose a kind of simple in structure, construction flexibly, excellent, the long service life of corrosion resistance be applicable to Steel Structure Weld corrosion-resistant composite coating structure.
The utility model is achieved through the following technical solutions: a kind of structure of the anticorrosive composite coating for Steel Structure Weld, at a kind of rare earth modified Anodic Type metal coating of thermal spraying on sandblast or ball surface-treated face of weld, be attached to and be followed successively by from inside to outside nanometer modified epoxy sealing lacquer coat, epoxy micaceous iron intermediate coat coating and polyurethane finish or fluorine carbon finishing paint coating on rare earth modified Anodic Type metal coating.
Described rare earth modified Anodic Type metal coating thickness is 100～160 μ m.
Described nanometer modified epoxy sealing lacquer coat thickness is 10～40 μ m.
Described epoxy micaceous iron intermediate coat coating layer thickness is 60～100 μ m.
Described polyurethane finish or fluorine carbon finishing paint coating layer thickness are 60～100 μ m.
The beneficial effects of the utility model are:
(1) in this metal composite coating, the metal coating even tissue is fine and close, porosity is low, bond strength is high, corrosion resistance and good; The nanometer modified epoxy sealing coated coating fully permeates, sealing effect outstanding; Add in addition intermediate coat and topcoat, whole composite coating structure is simple, Corrosion Protection is excellent, long service life, has practical generalization widely.
(2) this metal composite coating all can provide better reliable protection to the Steel Structure Weld under the environmental conditions such as inland environment, marine environment, industrial environment and the corrosion of heat affected area thereof.
(3) this metal composite coating is on being subject to External Force Acting and the Steel Structure Weld that affected by dither and stress corrosion destruction and the corrosion fatigue of the zone of influence all can provide effective protection.
The accompanying drawing explanation
Accompanying drawing 1 is the utility model Steel Structure Weld anticorrosive composite coating structural representation.
Wherein: 1, through sandblast or ball surface-treated weld seam matrix; 2, the rare earth modified Anodic Type metal coating of thermal spraying; 3, nanometer modified epoxy sealing lacquer coat; 4, epoxy micaceous iron intermediate coat coating; 5, polyurethane finish or fluorine carbon finishing paint coating.
The specific embodiment
Below in conjunction with 3 embodiment, the utility model is further described.
As shown in Figure 1, a kind of structure of the anticorrosive composite coating for Steel Structure Weld is at a kind of rare earth modified Anodic Type metal coating 2 of thermal spraying on sandblast or ball surface-treated face of weld 1, is attached to be followed successively by from inside to outside nanometer modified epoxy sealing lacquer coat 3, epoxy micaceous iron intermediate coat coating 4 and polyurethane finish or fluorine carbon finishing paint coating 5 on rare earth modified Anodic Type metal coating 2.Rare earth modified Anodic Type metal coating thickness 2 is 100～160 μ m.Nanometer modified epoxy sealing lacquer coat 3 thickness are 10～40 μ m.Epoxy micaceous iron intermediate coat coating 4 thickness are 60～100 μ m.Polyurethane finish or fluorine carbon finishing paint coating 5 thickness are 60～100 μ m.
Above-mentioned rare earth modified Anodic Type metal coating 2 is to adopt flame wire spraying or arc spraying technology to spray rare earth modified Anodic Type alumin(i)um zinc alloy silk to obtain, rare earth modified Anodic Type alumin(i)um zinc alloy silk, its composition is the percentage meter by weight, and component is: RE:0.1%～0.5%; Zn:3%～8%; Mg:0.5%～1.5%; Ti:0.05%～0.2%; M:0.01%～0.17%; Impurity is not more than 0.03%; All the other are Al; Described M is any or its combination in In, Sn, Ga, described RE be in La, Ce, Er, Sc any or its wantonly two kinds and arbitrarily than or its wantonly three kinds and arbitrarily than or its four kinds and arbitrarily than combination.
The nanometer modified epoxy sealing paint is Jiangsu Zhongkuangdazheng Surface Engineering Techn Co., Ltd.'s production and sales product, and epoxy micaceous iron intermediate coat, fluorine carbon finishing paint, polyurethane finish are commercially available conventional anticorrosion coating products.
3 embodiment are in Table 2.
Table 2 metal composite coating embodiment
Adopt existing detection technique and test method, the metal composite coating that the utility model is obtained is carried out bond strength, porosity and the performance measurement of anti-the neutral salt spray, testing result shows: the bond strength of metal coating porosity, coating and weld seam surpasses existing technical standard requirement, and metal composite coating shows that in neutral salt spray 5000h result of the test this composite coating comprehensive anticorrosive is respond well.
Claims (5)
1. the structure of the anticorrosive composite coating for Steel Structure Weld, it is characterized in that: through the upper thermal spraying Anodic Type metal coating (2) of sandblast or ball surface-treated face of weld (1), be attached to and be followed successively by from inside to outside nanometer modified epoxy sealing lacquer coat (3), epoxy micaceous iron intermediate coat coating (4) and polyurethane finish or fluorine carbon finishing paint coating (5) on thermal spraying Anodic Type metal coating (2).
2. a kind of structure of the anticorrosive composite coating for Steel Structure Weld according to claim 1, it is characterized in that: described thermal spraying Anodic Type metal coating thickness (2) is 100～160 μ m.
3. a kind of structure of the anticorrosive composite coating for Steel Structure Weld according to claim 1, it is characterized in that: described nanometer modified epoxy sealing lacquer coat (3) thickness is 10～40 μ m.
4. a kind of structure of the anticorrosive composite coating for Steel Structure Weld according to claim 1, it is characterized in that: described epoxy micaceous iron intermediate coat coating (4) thickness is 60～100 μ m.
5. a kind of structure of the anticorrosive composite coating for Steel Structure Weld according to claim 1, it is characterized in that: described polyurethane finish or fluorine carbon finishing paint coating (5) thickness are 60～100 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320186942.4U CN203371858U (en) | 2013-04-12 | 2013-04-12 | Anticorrosion composite coating structure used for welding seam of steel structures |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320186942.4U CN203371858U (en) | 2013-04-12 | 2013-04-12 | Anticorrosion composite coating structure used for welding seam of steel structures |
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| CN203371858U true CN203371858U (en) | 2014-01-01 |
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| CN201320186942.4U Expired - Lifetime CN203371858U (en) | 2013-04-12 | 2013-04-12 | Anticorrosion composite coating structure used for welding seam of steel structures |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104073757A (en) * | 2014-07-16 | 2014-10-01 | 中国石油大学(华东) | Method for enhancing corrosion resistance and fatigue resistance of ocean structural steel |
| CN106435600A (en) * | 2016-07-12 | 2017-02-22 | 中国船舶重工集团公司第七二五研究所 | Cathode protection method for metal coating layer in weld zone of offshore structural steel |
| CN110344639A (en) * | 2019-07-11 | 2019-10-18 | 湖北联网电力设计有限公司 | A kind of power transmission line tower bar guard member |
-
2013
- 2013-04-12 CN CN201320186942.4U patent/CN203371858U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104073757A (en) * | 2014-07-16 | 2014-10-01 | 中国石油大学(华东) | Method for enhancing corrosion resistance and fatigue resistance of ocean structural steel |
| CN106435600A (en) * | 2016-07-12 | 2017-02-22 | 中国船舶重工集团公司第七二五研究所 | Cathode protection method for metal coating layer in weld zone of offshore structural steel |
| CN110344639A (en) * | 2019-07-11 | 2019-10-18 | 湖北联网电力设计有限公司 | A kind of power transmission line tower bar guard member |
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| C14 | Grant of patent or utility model | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20140101 |
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| CX01 | Expiry of patent term |