CN202324350U - Reinforcing steel bar with protective coating - Google Patents
Reinforcing steel bar with protective coating Download PDFInfo
- Publication number
- CN202324350U CN202324350U CN2011203138532U CN201120313853U CN202324350U CN 202324350 U CN202324350 U CN 202324350U CN 2011203138532 U CN2011203138532 U CN 2011203138532U CN 201120313853 U CN201120313853 U CN 201120313853U CN 202324350 U CN202324350 U CN 202324350U
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- Prior art keywords
- corrosion
- coating
- protective coating
- reinforcing bar
- resistant finishes
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- Expired - Lifetime
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- 239000011253 protective coating Substances 0.000 title claims abstract description 46
- 229910001294 Reinforcing steel Inorganic materials 0.000 title abstract description 9
- 238000005260 corrosion Methods 0.000 claims abstract description 62
- 230000007797 corrosion Effects 0.000 claims abstract description 61
- 238000000576 coating method Methods 0.000 claims abstract description 29
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- 230000003014 reinforcing effect Effects 0.000 claims description 59
- 239000010410 layer Substances 0.000 claims description 35
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 229920006334 epoxy coating Polymers 0.000 claims description 10
- 239000011247 coating layer Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 239000011527 polyurethane coating Substances 0.000 claims description 2
- 239000004567 concrete Substances 0.000 abstract description 13
- 239000004568 cement Substances 0.000 abstract description 5
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- 239000004593 Epoxy Substances 0.000 description 5
- 230000006378 damage Effects 0.000 description 5
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- PRPAGESBURMWTI-UHFFFAOYSA-N [C].[F] Chemical compound [C].[F] PRPAGESBURMWTI-UHFFFAOYSA-N 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
- 230000005923 long-lasting effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002987 primer (paints) Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- 239000002344 surface layer Substances 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
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- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- Reinforcement Elements For Buildings (AREA)
Abstract
The utility model relates to a reinforcing steel bar with a protective coating, which is characterized in that the outside of the whole of the reinforcing steel bar is provided with an inner layer (1) of a corrosion-resistant coating; and meanwhile, the outside of the inner layer (1) of the corrosion-resistant coating is also coated with an outer layer (4) of the corrosion-resistant coating. Compared with a traditional reinforcing steel bar, the reinforcing steel bar with the protective coating has excellent fatigue-resistant performance and corrosion-resistant performance; the reinforcing steel bar with the protective coating has good use stability and has good wrapping (bonding) performance with concrete or cement slurry; and the reinforcing steel bar with the protective coating has foreseeable larger economic and social value.
Description
Technical field
The utility model relates to metal material anti-corrosion treatment technology, and a kind of reinforcing bar that has protective coating is provided especially.
Background technology
At present, processing that the reinforcing bar that has a protective coating has nothing further does not usually have Corrosion Protection usually.This reinforcing bar is used in general occasion and can be suitable for, but when being used for important or during special occasions (like bridge or chemical plant), then decay resistance must being arranged.
Common solution is just overlapped the last layer protective jacket in the reinforcing bar periphery, or is coated with the last layer protective paint at the reinforcing bar external surface.Yet gapped between protective jacket and the reinforcing bar, water and air or other Korrosionsmedium get into easily, so the effect of its anticorrosive property is not good.And the protective paint that applies at the reinforcing bar external surface very easily peels off, and makes it lose the protection effect.
Construction along with large foundation facilities engineerings such as airport, speedway, harbour, tunnel, Oversea bridges; Need the lot of reinforcing steel bar concrete structure; The long construction period of this major works also requires the design durability of major works to bring up to century-old above service life on the other hand on the one hand.Large-sized reinforced concrete durability of structures most important control step is the corrosion of the building iron of minimizing inside concrete, thereby stops the volume expansion of reinforcement corrosion product to make concrete cracking, slump.
Both at home and abroad building iron corrosion-resistant years of researches and practice have been carried out; Main plated film, zinc-plated, galvanizing, 316L stainless steel and the epoxy coating reinforcing bar etc. of adopting; First three protective coating reinforcing bar is because the diaphragm rete is thin; Though satisfy minor works construction and the protection in 30～50 years military service cycles; But diaphragm is very easy to peel off and damage in construction and the prefabricated process of bar bending, is prone to react with alkaline concrete at the follow-up zinc amphoteric metal topping that particularly contains during one's term of military service, influences it and protects long-acting durability; And in anticorrosion process, environment is had pollution, in large-scale durability engineering, can not get applying at present; Corrosion resistance such as 316L, two phase stainless steel base material reinforcing bar; Though have very strong corrosion resistance in theory; Consider in construction welding, crooked and bear the sensitiveness that is easy to generate local corrosion and stress corrosion in the external force load bearing process; Moreover price is more than 5 times of common building reinforcing bar, and the high-strength corrosion-resistant reinforcing bar is difficult to obtain practical applications, makes construction costs significantly improve.
Epoxy coating is to be applied in the main protective coating of protecting reinforcing bar electrochemical corrosion in the building concrete under the natural environmental conditions such as atmosphere, soil, seawater at present, has environmental protection, prefabricated convenience, moderate cost, strong, the good bandability, high with concrete binding intensity of electrical isolation capabilities.But present applied epoxy coating reinforcing bar is in order to satisfy crooked fast prefabricated requirement of engineering; The coating that applies is thinner; Thickness is generally at 150～300um, and variable color, powder phenomenon-tion often appear at the prefabricated scene of major works that coating receives ultraviolet radiation and in anti-mechanical shock, wearing and tearing, scuffing ability; The breakage rate of in the structure of reinforced concrete process, finding coating is very high; Influenced the integrality of coating in follow-up long service, found that such epoxy coating reinforced concrete structure lost efficacy in the time about 10 years abroad with in domestic many major workss, and the maintenance and repair difficulty.
The patent No. is 200920281466.8,200820207957.3 to disclose a kind of epoxy coating reinforcing bar; It is characterized in that: rebar surface is coated with epoxy coating; Adopt mode of heating spray epoxy powder, it is 150～300um that coating forms coating layer thickness through fusion, bonding, curing process.This utility model has mainly solved the flexible problem of bar construction, but the UV resistant of coating, damage resistant ability, wearing and tearing in construction works, scratch problem do not solve, and has influenced the long-lasting protection under heavy corrosion environment such as acid, alkali, salt.The patent No. is 201020182980.9 to disclose a kind of high-speed track slab muscle that scribbles the single layer of rings oxygen coating; Its processing protection mode and front several patents are roughly the same; Just increased the preservative treatment on the reinforcing bar cutting section; More can effectively improve the integral insulation performance of reinforcing bar, but not solve the engineering construction defective of ageing-resistant, the mechanical damage property of epoxy coating equally.
The patent No. is 02128318.4 1 kinds of anticorrosion prestressed bars; Be a kind of, be formed with blackout reinforcing bar, blackout high tensile steel wire, the blackout reinforcing bar of the special oxidation anticorrosive coat of one deck at its external surface after plain bars, high tensile steel wire, plain steel-bar and so on the presstressed reinforcing steel process surface blackening PROCESS FOR TREATMENT.This utility model patent is a kind of inorganic chemistry protective oxide layer, and rete is thinner, does not solve the problem of anti-physical mechanical damage capability difference equally, and the environmental pollution problem is arranged.
The patent No. is 200420108522.5 to disclose a kind of reinforced concrete member with anticorrosive coat; Relate to the improvement of reinforced concrete member structure; The utility model technical problem to be solved provides a kind of by water, change cryosel and chemical ion erosion and corrosion, the reinforced concrete member with anticorrosive coat of good endurance, and its structural feature is that this external surface of steel concrete is provided with bottom, surface layer from inside to outside; Adopt the cold spraying liquid coating; Bottom is the epoxy liquid coating, and thickness is 100um, and surface layer is the liquid fluorocarbon coating.Though this coating structure has been considered the degradation of ultraviolet-resistant aging, coating process is complicated, and quality is unstable; Curing time is long, and the centre does not have the transition tack coat, causes ply adhesion not strong; Coating performance is low; It is poor that anti-mechanical damage is destroyed, and generally is used for the reparation of concrete exposed reinforcement, can not satisfy the long-lasting protection under harsh construction environment and the heavy corrosion environment.
People's expectation reaches the reinforcing bar that a kind of technique effect better has protective coating.
Summary of the invention
The purpose of the utility model provides the reinforcing bar that a kind of technique effect better has protective coating.
The utility model provides a kind of reinforcing bar that has protective coating, it is characterized in that: the space between outside and/or each strand of said steel bar overall all has corrosion-resistant finishes internal layer 1; Simultaneously, also be coated with corrosion-resistant finishes outer 4 in corrosion-resistant finishes internal layer 1 outside.
The said reinforcing bar that has protective coating of the utility model is characterized in that: the thickness of said corrosion-resistant finishes internal layer 1 is 0.15 ~ 0.50mm.Outer 4 outsides of said corrosion-resistant finishes also further are coated with outermost layer 5; Outermost layer 5 thickness are 0.05～0.2mm.
Further preferred the requirement: the thickness of said corrosion-resistant finishes outer 4 or corrosion-resistant finishes outer 4 are 0.1 ~ 0.5mm with the thickness sum of outermost layer 5.
The said thickness that has other coating layer portions of reinforcing bar outside except corrosion-resistant finishes internal layer 1 of protective coating is 0.175 ~ 0.375mm.
Said corrosion-resistant finishes internal layer 1 is an epoxy resin powder coating;
Said corrosion-resistant finishes outer 4 with outermost layer 5 be below one of several kinds: polyurethane coating, acrylic acid coatings, gather fluororine-carbon coating, remodeling epoxy coating or other functional protection coating.
One deck sand grains in the said also uniform embedding of outer 4 outer surfaces of corrosion-resistant finishes that is arranged in the steel bar overall outside that has protective coating.
The said reinforcing bar that has protective coating of the utility model is applicable to that corrosive environment is abominable and requires the protection of the length of service more than 70 years.
The manufacturing approach of the said reinforcing bar that has a protective coating is roughly following:
1) launches reinforcing bar or directly select for use the single steel wire line to make raw material;
2) to the rebar surface purified treatment;
3) reinforcing bar is preheated.
4) reinforcing bar is carried out the electrostatic spraying operation, can adopt the epoxy powder of heavy anti-corrosive properties, high tenacity, high-wearing feature;
5) each strand is twisted together;
6) cured; And do protective coating spraying for the second time; The material of two layers of coatings is distinguished to demands of different to some extent;
7) reinforcing bar that processes is pulled out, receive winding displacement again.
Compare with existing reinforcing bar, the utlity model has following advantage:
1, anti-fatigue performance is remarkable: because epoxy coating filled-type reinforcing bar skin is with coatings such as epoxy materials, epoxy material has certain thickness, can effectively prevent the steel wire and peripheral concrete, cement paste or other metal generation CONTACT WITH FRICTION of reinforcing bar;
2, corrosion resistance is remarkable: owing to yet all coated and filled by resistant material between corrosion-resistant finishes filled-type reinforcing bar surface and the steel wire, can prevent that steam and corrosive medium from infiltrating, the protection reinforcing bar is not corroded;
3, stability in use is good, has improved whole service life;
4, the said reinforcing bar that has a protective coating of the utility model and concrete or cement paste to bond (bonding) performance good: because one deck sand grains in the outer resistant material surface embedding uniformly of corrosion-resistant finishes filled-type reinforcing bar; Increased the frictional resistance with concrete or cement paste, can guarantee that corrosion-resistant finishes filled-type reinforcing bar and concrete or cement paste bond together reliably.
The utility model technique effect obviously is superior to prior art, and it has foreseeable comparatively huge economy and social value.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation:
Fig. 1 is the said bar cross section structural representation that has protective coating of the utility model.
The specific embodiment
1 one kinds of reinforcing bars that have protective coating of embodiment
A kind of reinforcing bar that has protective coating is like Fig. 1; Said steel bar overall be externally coated with corrosion-resistant finishes internal layer 1.Simultaneously, also be coated with corrosion-resistant finishes outer 4 in corrosion-resistant finishes internal layer 1 outside.
Said corrosion-resistant finishes internal layer 1 thickness that is arranged in the steel bar overall outside that has protective coating is 0.1～2mm.The minimum range of the inner reinforcing bar of outer 4 distances of said corrosion-resistant finishes is 0.22 ~ 0.32mm, is applicable under the comparatively abominable situation long with serving time requirement of corrosive environment.Require relatively low environment.
2 one kinds of reinforcing bars that have protective coating of embodiment
Present embodiment and embodiment 1 content are basic identical, and its difference is:
The said outside that has the steel bar overall of protective coating has corrosion-resistant finishes internal layer 1.Simultaneously, also be coated with corrosion-resistant finishes outer 4 in corrosion-resistant finishes internal layer 1 outside.One deck sand grains in the said also uniform embedding of outer 4 outer surfaces of corrosion-resistant finishes that is arranged in the steel bar overall outside that has protective coating.
3 one kinds of reinforcing bars that have protective coating of embodiment
Present embodiment and embodiment 1 content are basic identical, and its difference is:
A kind of reinforcing bar that has protective coating, core is a screw-thread steel, it is whole is externally coated with corrosion-resistant finishes internal layer 1.Simultaneously, also be coated with corrosion-resistant finishes outer 4 in corrosion-resistant finishes internal layer 1 outside.
Said corrosion-resistant finishes internal layer 1 thickness that is arranged in the steel bar overall outside that has protective coating is 0.05～15mm.The minimum range of the inner reinforcing bar of outer 4 distances of said corrosion-resistant finishes is 0.175 ~ 0.275mm.One deck sand grains in the said also uniform embedding of outer 4 outer surfaces of corrosion-resistant finishes that is arranged in the steel bar overall outside that has protective coating.
5 one kinds of reinforcing bars that have protective coating of embodiment
A kind of reinforcing bar that has protective coating, its outside has corrosion-resistant finishes internal layer 1.
Said corrosion-resistant finishes internal layer 1 thickness that is arranged in the steel bar overall outside that has protective coating is 0.1～2mm.The minimum range of the inner reinforcing bar of outer 4 distances of said corrosion-resistant finishes is 0.30 ~ 0.40mm, is applicable to the instructions for use of the long-life time limit and adverse circumstances.
One deck sand grains in the said also uniform embedding of outer 4 outer surfaces of corrosion-resistant finishes that is arranged in the steel bar overall outside that has protective coating.
Embodiment 6: as shown in Figure 1, the new coating reinforcing bar is after rebar matrix is through surfacing; Be heated to 200～280 ℃ through intermediate frequency or hot-blast stove, apply the bottom FBE earlier, preceding precast reinforced coating layer thickness is 150～300um; The precast reinforced coating layer thickness in back is 150～300um; Then before primer coating is not also solidified, apply second layer polyurethane, acrylic acid or or gather modified powder protective coating such as fluorine carbon, coating layer thickness is 200～400um; Process waste heat curing or hot-blast stove, heating in medium frequency are carried out curing conservation once more, carry out coating integrality and thickness at last and detect.
Embodiment 7: as shown in Figure 1, the new coating reinforcing bar is after rebar matrix is through surfacing; Be heated to 200～280 ℃ through intermediate frequency or hot-blast stove; Apply the bottom FBE earlier, preceding precast reinforced coating layer thickness is 150～300um, and the precast reinforced coating layer thickness in back is 130～300um; Then before primer coating is not also solidified; Apply intermediate layer polyurethane, acrylic acid modified FBE 100～200 um, before does not solidify in the intermediate layer again coated with polyurethane, acrylic acid or or gather modified powder protective coating such as fluorine carbon, coating layer thickness is 100～200um; Process waste heat curing or hot-blast stove, heating in medium frequency are carried out curing conservation once more, carry out coating integrality and thickness at last and detect.
Claims (7)
1. reinforcing bar that has protective coating, it is characterized in that: the outer setting of said steel bar overall has corrosion-resistant finishes internal layer (1); Simultaneously, also be coated with corrosion-resistant finishes skin (4) in corrosion-resistant finishes internal layer (1) outside.
2. according to the said reinforcing bar that has protective coating of claim 1, it is characterized in that: said corrosion-resistant finishes internal layer (1) thickness is 0.15-0.50mm.
3. according to the said reinforcing bar that has protective coating of claim 2, it is characterized in that: outer (4) outside of said corrosion-resistant finishes also further is coated with outermost layer (5); Outermost layer (5) thickness is 0.05～0.2mm.
4. according to claim 2 or the 3 said reinforcing bars that have protective coating, it is characterized in that: the thickness of said corrosion-resistant finishes outer (4) or corrosion-resistant finishes outer (4) are 0.1-0.5mm with the thickness sum of outermost layer (5).
5. according to the said reinforcing bar that has protective coating of claim 4, it is characterized in that:
The said thickness that has other coating layer portions of reinforcing bar outside except corrosion-resistant finishes internal layer (1) of protective coating is 0.175-0.375mm.
6. according to the said reinforcing bar that has protective coating of claim 4, it is characterized in that:
Said corrosion-resistant finishes internal layer (1) is an epoxy resin powder coating;
Said corrosion-resistant finishes outer (4) with outermost layer (5) be below one of several kinds: polyurethane coating, acrylic acid coatings, gather fluororine-carbon coating, the epoxy coating of retrofiting.
7. according to one of them said reinforcing bar that has protective coating of claim 1-3, it is characterized in that: one deck sand grains in the said also uniform embedding of outer (4) outer surface of corrosion-resistant finishes that is arranged in the steel bar overall outside that has protective coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203138532U CN202324350U (en) | 2011-08-26 | 2011-08-26 | Reinforcing steel bar with protective coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203138532U CN202324350U (en) | 2011-08-26 | 2011-08-26 | Reinforcing steel bar with protective coating |
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| Publication Number | Publication Date |
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| CN202324350U true CN202324350U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203138532U Expired - Lifetime CN202324350U (en) | 2011-08-26 | 2011-08-26 | Reinforcing steel bar with protective coating |
Country Status (1)
| Country | Link |
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| CN (1) | CN202324350U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074960A (en) * | 2012-08-13 | 2013-05-01 | 江苏欧赛德科技有限公司 | Double-layer epoxy resin coating reinforcing steel bar and manufacturing method thereof |
| WO2014067267A1 (en) * | 2012-10-29 | 2014-05-08 | 厦门新钢金属制品有限公司 | Insulation steel bar with composite coating for gravelless rail board |
| CN106269446A (en) * | 2016-10-07 | 2017-01-04 | 柳州欧维姆机械股份有限公司 | High anticorrosion major diameter high-strength screw-thread steel rod and preparation method thereof |
| CN111187022A (en) * | 2018-11-14 | 2020-05-22 | 王子国 | Corrosion-induced shape memory fiber and preparation method and application thereof |
| CN114673307A (en) * | 2022-03-29 | 2022-06-28 | 中国矿业大学 | Method for adhering and winding connecting steel bars by using high-strength fiber fabric and structural adhesive |
-
2011
- 2011-08-26 CN CN2011203138532U patent/CN202324350U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074960A (en) * | 2012-08-13 | 2013-05-01 | 江苏欧赛德科技有限公司 | Double-layer epoxy resin coating reinforcing steel bar and manufacturing method thereof |
| WO2014067267A1 (en) * | 2012-10-29 | 2014-05-08 | 厦门新钢金属制品有限公司 | Insulation steel bar with composite coating for gravelless rail board |
| CN106269446A (en) * | 2016-10-07 | 2017-01-04 | 柳州欧维姆机械股份有限公司 | High anticorrosion major diameter high-strength screw-thread steel rod and preparation method thereof |
| CN111187022A (en) * | 2018-11-14 | 2020-05-22 | 王子国 | Corrosion-induced shape memory fiber and preparation method and application thereof |
| CN114673307A (en) * | 2022-03-29 | 2022-06-28 | 中国矿业大学 | Method for adhering and winding connecting steel bars by using high-strength fiber fabric and structural adhesive |
| CN114673307B (en) * | 2022-03-29 | 2023-08-22 | 中国矿业大学 | Method for pasting winding connection reinforcing steel bar by using high-strength fiber fabric and structure adhesive |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |