CN104104038A - Corrosion protection method for cable tray of cross-sea bridge in high salt-fog region - Google Patents
Corrosion protection method for cable tray of cross-sea bridge in high salt-fog region Download PDFInfo
- Publication number
- CN104104038A CN104104038A CN201410357761.2A CN201410357761A CN104104038A CN 104104038 A CN104104038 A CN 104104038A CN 201410357761 A CN201410357761 A CN 201410357761A CN 104104038 A CN104104038 A CN 104104038A
- Authority
- CN
- China
- Prior art keywords
- steel
- fog
- high salt
- bridge
- corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Bridges Or Land Bridges (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention specifically relates to a corrosion protection method for a cable tray of a cross-sea bridge in a high salt-fog region. The corrosion protection method includes firstly selecting Q355GNH weathering resistant steel to replace normal low alloy steel as a principal material of the tray, wherein the atmospheric corrosion resistant property of the weathering resistant steel is 4 to 8 times that of the ordinary steel, and the coating property of the weathering resistant steel is 2 to 10 times that of the ordinary steel; selecting zinc-aluminium alloy with the volume ratio of 1: 1 as thermal spraying metal and covering epoxy micaceous iron oxide intermediate paint and fluorocarbon finish paint on a metal coating, wherein the epoxy micaceous iron oxide intermediate paint and the fluorocarbon finish paint have excellent performances of corrosion resistance, no maintenance, self cleaning, high adhesiveness, and ultra-long weather resistance; using a Q235 hot-dip galvanized steel grating plate as a grating plate, wherein the Q235 hot-dip galvanized steel grating plate is convenient to install and detach; using A4-70 stainless steel bolts in consideration of the importance of the bolts on a bridge structure and the inadaptation of a corrosion protection system of the principle material to friction that the principle material needs to bear, wherein the stainless steel bolts are good in resistance to salt-fog corrosion. The corrosion protection method is capable of furthest reducing times for repairing or repainting an erosion resistant coating of the cable tray in the high salt-fog region environment, reducing daily maintenance difficulties and investments, and achieving the purpose of minimizing full life cycle costs of the cable tray.
Description
Technical field
The invention belongs to highway bridge steel structure corrosion-resistant field, be specifically related to the anti-corrosion method of a kind of high salt fog-zone bridge spanning the sea cable testing bridge.
Background technology
When the cable arrangements of bridge spanning the sea is outside bridge case, steel structure bridge stand is affected seriously by oceanic tide wet salt mist, and the residing position of crane span structure regular maintenance difficulty is larger simultaneously, and conventional anticorrosive measure is difficult to meet above-mentioned requirements simultaneously.Therefore according to engineering characteristic, in conjunction with the characteristic of various steel construction typical case anticorrosion techniques, consider the purposes difference of each parts of structure, the Project for Corrosion Protection of choosing applicable this situation is very important.
< < highway bridge steel structure anticorrosive coating technical conditions > > recommends the outer coating matching system that should arrange of the form substrate of such corrosive environment, mainly contains 2 classes: (1) heavy-duty anticorrosive coating (2) metal thermal spraying+sealing finish paint.
Heavy-duty anticorrosive coating, according to U.S. steel structure coating association (SSPC) related standards regulation, under naval air environment, use, the content of zinc powder should account for 85% ~ 95% of total nonvolatile matter, when simple employing heavy-duty anticorrosive coating, the very different situation of domestic zinc-rich paint is more serious on the one hand, is difficult to guarantee really can reach this content requirement, heavy-duty anticorrosive coating requires must carry out the brushing again of lacquer painting every certain time limit on the other hand, and the residing position of crane span structure construction maintenance difficulty is larger.
During simple employing metal thermal spraying+sealing finish paint, the not fine solution of problem that the certain time limit in interval must be brushed again, simultaneously; when thermal spraying metal is selected zinc, hardness and the shock resistance of coating are poor, while selecting aluminium; current potential just trends towards, and cathodic protection ability is less than zinc.
For annexes such as the flase floor of crane span structure, bolts, the problem of existence is: its often the characteristic of taking up wear determined that the protective system same with the main material of crane span structure is no longer applicable to it.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, the anti-corrosion method of a kind of high salt fog-zone bridge spanning the sea cable testing bridge is provided.This anti-corrosion method has reduced the number of times that under the environment of high salt fog-zone, cable testing bridge anticorrosive coat is repaired or again brushed to greatest extent, has reduced difficulty and the investment of regular maintenance, has realized the target of crane span structure Life Cycle Cost minimum.
For achieving the above object, the present invention adopts following technical scheme:
An anti-corrosion method for high salt fog-zone bridge spanning the sea cable testing bridge, adopts Q355GNH weathering steel to replace ordinary low-alloy steel, as the main material of crane span structure.Q355GNH weathering steel atmospheric corrosion resistance is ordinary steel 4～8 times, coating performance is 2 ~ 10 times of ordinary steels, can attenuate uses, exposed use or simplify application and use.When plating is used, its metal cladding and matrix adhesive force are strong compared with ordinary steel, local corrosion speed occurs under metal level and reduce, and the probability that metal level sustains damage is reduced.Meanwhile, due to slow than ordinary steel of the speed of its iron rust expansion, extended the deteriorated time of metal level.After coating local damage was lost efficacy, steel surface can form passivation protection film gradually, needs the frequency of daily tour low, if do not find in one or two years, lagging behind, it is little to carry out sectional repair impact.
The metal that thermal spraying is selected is the allumen of volume ratio 1:1, can take into account hardness and shock resistance and the cathodic protection effect of coating simultaneously.
Metal coating outer cover epoxy micaceous iron intermediate coat and fluorine carbon finishing paint, the chemical inertness of this coating determines that it possesses good Corrosion Protection, extremely low surface energy and hydrophobicity make it have non-maintaining, self-cleaning feature, also possess the advantages such as strong adhesion and overlength weatherability simultaneously.
Adopt Q235 hot galvanizing steel grating as flase floor, easy installation and removal.
In view of bolt is not suitable with to the protective system of the importance of structure and main material the feature that it must bear friction, selects the stainless steel bolt of A4-70, and preferentially select the stainless steel bolt of the A4-70 that the best trade mark of salt fog resistance is 316L.
Beneficial effect of the present invention is:
This anti-corrosion method has reduced the number of times that under the environment of high salt fog-zone, cable testing bridge anticorrosive coat is repaired or again brushed to greatest extent, has reduced difficulty and the investment of regular maintenance, has realized the target of crane span structure Life Cycle Cost minimum.
Embodiment
The present invention further illustrates the present invention with the following example, but protection scope of the present invention is not limited to the following example.
embodiment 1
Using Q355GNH weathering steel as the main material of crane span structure, and at the allumen of its thermal spraying on surface volume ratio 1:1, metal coating outer cover epoxy micaceous iron intermediate coat and fluorine carbon finishing paint; Adopt Q235 hot galvanizing steel grating as flase floor, selecting the trade mark is the stainless bolt of the A4-70 of 316L.The cable testing bridge of making is thus compared with existing cable testing bridge, and corrosion resistance is good, and the life-span is long, and regular maintenance is relatively easy, and expense is less.And in the life-cycle, flase floor has only been changed once in engineering.Table 1 is the economic input comparison of various anticorrosion schemes.As can be seen from Table 1, adopt Project for Corrosion Protection of the present invention to understand than common anticorrosion scheme still less on economic input, and anticorrosion ability is better.
The economy comparison of the various anticorrosion schemes of table 1
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (5)
1. an anti-corrosion method for high salt fog-zone bridge spanning the sea cable testing bridge, is characterized in that: adopt Q355GNH weathering steel to replace ordinary low-alloy steel, as the main material of crane span structure.
2. the anti-corrosion method of high salt according to claim 1 fog-zone bridge spanning the sea cable testing bridge, is characterized in that: the metal that thermal spraying is selected is the allumen of volume ratio 1:1 metal coating outer cover epoxy micaceous iron intermediate coat and fluorine carbon finishing paint.
3. the anti-corrosion method of high salt according to claim 1 fog-zone bridge spanning the sea cable testing bridge, is characterized in that: adopt Q235 hot galvanizing steel grating as flase floor.
4. the anti-corrosion method of high salt according to claim 1 fog-zone bridge spanning the sea cable testing bridge, is characterized in that: the bolt of crane span structure is selected the stainless steel bolt of A4-70.
5. the anti-corrosion method of high salt according to claim 4 fog-zone bridge spanning the sea cable testing bridge, is characterized in that: the stainless steel bolt of preferentially selecting the A4-70 that the best trade mark of salt fog resistance is 316L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410357761.2A CN104104038A (en) | 2014-07-25 | 2014-07-25 | Corrosion protection method for cable tray of cross-sea bridge in high salt-fog region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410357761.2A CN104104038A (en) | 2014-07-25 | 2014-07-25 | Corrosion protection method for cable tray of cross-sea bridge in high salt-fog region |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104104038A true CN104104038A (en) | 2014-10-15 |
Family
ID=51671956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410357761.2A Pending CN104104038A (en) | 2014-07-25 | 2014-07-25 | Corrosion protection method for cable tray of cross-sea bridge in high salt-fog region |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104104038A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05207625A (en) * | 1992-01-24 | 1993-08-13 | Haseko Corp | Harness wiring system for condominium |
| CN201204408Y (en) * | 2008-06-11 | 2009-03-04 | 江苏金利电气有限公司 | Long-acting anticorrosion cable bridge rack |
| CN202302311U (en) * | 2011-05-31 | 2012-07-04 | 孙电人 | Plastic steel cable bridge |
-
2014
- 2014-07-25 CN CN201410357761.2A patent/CN104104038A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05207625A (en) * | 1992-01-24 | 1993-08-13 | Haseko Corp | Harness wiring system for condominium |
| CN201204408Y (en) * | 2008-06-11 | 2009-03-04 | 江苏金利电气有限公司 | Long-acting anticorrosion cable bridge rack |
| CN202302311U (en) * | 2011-05-31 | 2012-07-04 | 孙电人 | Plastic steel cable bridge |
Non-Patent Citations (1)
| Title |
|---|
| 王军等: "我国跨海大桥钢结构防腐保护与涂装", 《现代涂料与涂装》, vol. 11, no. 10, 31 October 2008 (2008-10-31), pages 37 - 41 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203427398U (en) | Corrosion-resistant and wear-resistant composite structure | |
| CN101717942B (en) | Metal surface anti-corrosion layer structure and coating method thereof | |
| CN201473946U (en) | Composite protective steel pile structure | |
| CN1141414C (en) | Anticorrosion method of marine steel | |
| CN103525219A (en) | Environment-friendly antirust primer | |
| CN103666201A (en) | Long-acting acid-base resistant solvent-free anticorrosive paint as well as preparation method and application thereof | |
| CN113150642A (en) | Anticorrosive coating system for outer wall of tower cylinder of ocean wind turbine generator and coating method | |
| CN102989649B (en) | Organic top coating double-layer protecting method for galvanized steel fasteners | |
| CN105521933A (en) | Processing method for anti-corrosive fluorocarbon coating of anchor bolt | |
| CN114213910A (en) | Corrosion-resistant heavy-duty anticorrosive paint | |
| CN104104038A (en) | Corrosion protection method for cable tray of cross-sea bridge in high salt-fog region | |
| CN202651640U (en) | Saline-alkaline corrosion proofing outdoor switch cabinet | |
| CN104927433A (en) | Anticorrosion paint | |
| CN210906826U (en) | Water-based alkyd antirust primer coating structure | |
| CN104253577A (en) | Weather-resistant metal support structure | |
| CN112547464A (en) | Support with thermal spraying metal composite coating | |
| JP2014202266A (en) | Highly corrosion-resistant self-tapping screw, and method for manufacturing the same | |
| CN102285187A (en) | Sacrificial protective coating with chemical protection function | |
| CN105482693A (en) | Antirust coating for steel materials | |
| JP5784791B2 (en) | Post-treatment method and post-treatment agent for thermal spray coating comprising aluminum / magnesium alloy | |
| CN220999554U (en) | Alkyd finish paint coating for dip-coating process | |
| CN110281611A (en) | A kind of long lasting anticorrosion coating structure | |
| JP5554194B2 (en) | Post-treatment method and post-treatment agent for thermal spray coating | |
| CN114074064A (en) | Corrosion-resistant coating for road rust remover and corrosion-resistant process | |
| CN211463768U (en) | High salt spray resistant PCM composite board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141015 |