CN105331924A - Corrosion resistance technology of steel structure - Google Patents
Corrosion resistance technology of steel structure Download PDFInfo
- Publication number
- CN105331924A CN105331924A CN201410399893.1A CN201410399893A CN105331924A CN 105331924 A CN105331924 A CN 105331924A CN 201410399893 A CN201410399893 A CN 201410399893A CN 105331924 A CN105331924 A CN 105331924A
- Authority
- CN
- China
- Prior art keywords
- spraying
- controls
- spray
- aluminium
- degree
- 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
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a profiled steel structure, relates to the technical field of profiled steel, in particular to a profiled steel structure for supporting of a stamping machine. The profiled steel structure comprises profiled steel (1). The section of the profiled steel (1) is of an H-shaped structure. Longitudinally-arranged grooves (2) are formed in the upper face and the bottom face of the profiled steel (1). A carbon fiber layer (3) is bonded to the surface of the profiled steel (1), and the thickness of the carbon fiber layer (3) is 0.8-1.25 mm. Preferably, the thickness of the carbon fiber layer (3) is 0.9-1.1 mm. The problems that when heating furnace supporting profiled steel is produced through ultrafine grained steel, the coefficient of thermal expansion is relatively high, deformation can be generated by heating, and consequently heating equipment needs to be maintained regularly, and the safety of the heating equipment is lowered are solved.
Description
Technical field
The present invention relates to steel structure surface anticorrosion, particularly relate to a kind of steel structure anti-corrosion process.
Background technology
Exposing the steel construction in lowered in field environment to the open air, very easily there is chemistry and electrochemical action and corrosion in its surface with surrounding environment.Therefore need at its surface-coated one deck preservative coat to protect steel construction body not by corrosion.But when steel structure surface corrosion protection coating poor-performing and damaged time, steel construction body also can be made to be exposed to outer and to produce corrosion.Steel building is generally large-scale permanent construction, service year limit for length, maintenance difficult, must carry out effective long-effective corrosion, to guarantee the work-ing life of buildings.
Summary of the invention
Object of the present invention, exactly in order to solve the problem, provides a kind of favorable anti-corrosion effect of coating, the steel structure anti-corrosion process of long service life.
In order to achieve the above object, present invention employs following technical scheme: a kind of steel structure anti-corrosion process, its step comprises surface cleaning process, derusting by sandblast, spray-applied primer and spray paint; Be characterized in, also comprise electric arc aluminium spraying step, after electric arc aluminium spraying step is arranged on derusting by sandblast step and before spray-applied primer step; Described electric arc aluminium spraying adopts arc pistol, take electric arc as thermal source, the wire aluminium wire of purity >=99.5% is heated to molten state, with pressurized air, the aluminium of melting is blown out vaporific simultaneously, and forming affined grain flow, even application forms one deck aluminium lamination at matrix surface.
During described electric arc aluminium spraying, the distance controlling of spray gun and matrix surface is at 200 ~ 250mm, and spray angle controls at 45 degree of-90 degree, and spray gun translational speed controls at 300 ~ 400mm/s, and the transfer rate of aluminium wire controls at 5m/min; Arc voltage controls at 24 ~ 34V, and flame current controls at 100 ~ 300A, and compressed air pressure controls at 0.6 ~ 0.7Mpa.
Described electric arc aluminium spraying adopts layering spraying, and before spraying, the spraying direction of one deck forms 45 degree to 90 degree intersecting with the spraying direction of spraying later layer; The aluminum layer thickness having sprayed rear formation controls at 100 μm ~ 120 μm, and Roughness Surface on Control is at Rz50 μm.
Described derusting by sandblast adopts band corner angle steel sand, and sand grains size controls at 0.5-2.0mm, and sandblasting gaseous tension controls at 0.65MPa, and sandblasting distance controlling is at 200 ~ 250mm, and sandblasting Angle ambiguity is at 90 degree.
Described spray-applied primer and spray paint adopt high pressure airless spraying apparatus to spray respectively, pressure-controlling is at 0.50 ~ 0.60Mpa, spray distance controls at 70 ~ 200mm, and the Angle ambiguity of spray gun and matrix surface is at 45 degree to 90 degree, and the even translational speed of spray gun controls at 300 ~ 400mm/s.
Adopt steel structure anti-corrosion process of the present invention, the bonding force of its corrosion protection coating and steel construction matrix is strong, on average reaches 12.0Mpa, is much higher than national standard, can reach the object of long-effective corrosion and improve the outward appearance of structure.
Embodiment
The concrete implementation step of steel structure anti-corrosion process of the present invention is as follows:
The first step: preparatory stage
Comprise the investigation to construction environment, project scale etc., and the preparation of various preparation of construction.
Second step: surface cleaning process
Before derusting by sandblast, first check the outward appearance on construction object (as girder steel and other steel construction) surface, effects on surface have that overlap, splash, pin hole, overlap and burr are lofty, welding slag etc., carry out polishing and clear up, sharp corner, is processed into the fillet of more than radius 2mm; With grease, grease, soluble salt, rust, oxide skin etc. and other dirt of the cleaning such as sanitising agent or solvent removing matrix surface.Surface treatment quality reaches drying, free from dust, without grease, without dirt, comprises solubility salt exist without rust staining and other
Interior pollution, reaches GB11373-89 code requirement.
3rd step: derusting by sandblast
Derusting by sandblast is one of principal element of relation girder steel and other anticorrosion of steel structure painting effect.In order to reach the derusting by sandblast standard of Sa3 level, sand-blasting abrasive adopts band corner angle steel sand.Sand grains size controls at 0.5-2.0mm, and water ratio is less than 1%, and clean clean, meets GB11373-89 regulation (reclaiming sand will clean, dry, screen).
The pressurized air that sandblasting uses must keep clean and dry, and air compressor machine will be equipped with dehumidifying, oil removing treating plant, keeps sandblasting gaseous tension to stablize, roughly at 0.5-0.60MPa in sandblasting procedures.Sandblasting distance roughly remains within the scope of 100-200mm.Sandblasting angle should remain on 70 degree of-80 best sandblasting level of degree, and matrix roughness should increase with the increase of sandblasting angle.Derusting by sandblast Sa2.5 level, and surface clearness reaches Sa3 level, derusting by sandblast Sa3 level requires that roughness is Rz60-100 μm, and steel sand particle is 0.5-2.0mm.Reach B8923-88 standard.Sandblasting environmental requirement relative humidity is less than or equal to 80%, and outdoor is forbidden in the operation of the weather such as sleet, condensation.Sandblasting envrionment temperature is higher than 5 DEG C, and basal plane actual temperature is higher than dew-point temperature 5 DEG C.
Sandblasting quality examination, adopts 223 numeric type surface roughness measuring instruments to measure.Derusting by sandblast effect reaches: without rusty stain, without dirt, non-scale, without grease grease, free from dust and other pollution, matrix surface presents uniform canescence metalluster, and roughness is Rz50 μm.
4th step: electric arc aluminium spraying (aluminum layer thickness reaches 100 μm ~ 120 μm)
Electric arc aluminium spraying construction to be carried out as early as possible after the steel construction matrix surface sandblastings such as girder steel, avoid secondary pollution.Interval time was preferably no more than 12 hours.The wire aluminium wire of spraying, aluminium purity >=99.5%, gauge or diameter of wire is clean in smooth surface,
Without scraping bits, breach, serious twist and warping and kink, non-oxidation, without grease or other pollution, meet GB/T3190-96 standard.During electric arc aluminium spraying, the distance controlling of spray gun and matrix surface is at 200 ~ 250mm, and spray angle controls at 45 degree of-90 degree, and spray gun translational speed controls at 300 ~ 400mm/s, and the transfer rate of aluminium wire controls at 5m/min; Arc voltage controls at 24 ~ 34V, and flame current controls at 100 ~ 300A, and compressed air pressure controls at 0.6 ~ 0.7Mpa
Deposited aluminum adopts layering spraying, and front one deck must form 45 degree to 90 degree intersecting with the spraying direction of later layer, to ensure the even of coating and high-adhesion.Aluminium-plated complete after Coating Surface Roughness generally at Rz50 μm.
In aluminium-plated process, note the temperature conditions of steel structure surface, in arc spray process, matrix surface temperature more than 200 DEG C, if temperature is too high, must not will stops spraying, treat that it suitably cools.During spraying, temperature should be 5 DEG C of < t < 35 DEG C, and humidity is less than 80%.
Electric arc spraying voltage control is at 24 ~ 34V, and current control is at 100 ~ 300A.Under the prerequisite that arc stability burns is safeguarded in guarantee, arc voltage suitably controls at lower level, reduces and reduce power supply waste to prevent coating quality; According to the diameter of aluminium wire and for silk speed, regulate flame current; For improving spray efficiency, reducing void content and oxide content, improving coating quality, during spraying, high workload levels of current can be kept.
Atomization pressure should remain on 0.6 ~ 0.7Mpa (Standard is 0.40 ~ 0.50Mpa).
Be equipped with the oil removing such as air filter, dehumidifying treating plant, guarantee gases used drying and not oily.Ensure normal gaseous tension to the film thickness tolerance of aluminium lamination and sticking power quality control all very important.
Should reserve weld during electric arc spraying anticorrosive construction in steel construction source mill, width 50mm is reserved in every side, and protection pasted by blend compounds band paper.
5th step: aluminium lamination quality examination
Comprise visual inspection, thickness inspection and anchoring strength of coating (bonding force).Visual inspection requires that aluminum metal layer particle is fine and closely woven, thickness even, must not have solid impurity, bubble, hole, crack etc.
Thickness inspection requirements aluminum layer thickness is between A+20 μm ~ A-30 μm (wherein A is design requirements thickness), and use magnetic-type gage to detect, measuring point is random.
(aluminum coating is granular accumulation horizon, and proportion is gently more a lot of than aluminum metal entity, many spaces between particle in coating, and coatingsurface is coarse, and coat-thickness tolerance is comparatively large, and this is a kind of outwardness; Select appropriate aluminum coating thickness very important, coating is too thick easily causes coating stripping.Reason is that the thermal expansivity of aluminum coating and body material is different, causes shrinkage between the two different thus produces internal stress.Along with coat-thickness increases, internal stress also corresponding increase in coating, cohesive strength declines, and when this internal stress exceedes its cohesive strength, coating just occurs peeling.)
6th step: spraying epoxy seal coat and polyurethane finish
After the matrix surfaces such as girder steel are aluminium-plated, will carry out spraying seal coat when matrix surface still has a surplus temperature, therefore spray-applied primer preparation work will be fulfiled ahead of schedule, and the timed interval must not more than 5h.
Before spray-applied primer, must not there be pollution and aqueous vapor etc. in arc spray coatings surface; Closed application should dew-point temperature more than 3 DEG C, and relative humidity less than 85% is carried out, and sleety weather should stop construction.Closed application first should carry out manual precoating, the position of brushing all weld seams, corner, dead angle and not easily spraying, to ensure that there is enough thickness (within the scope of butt weld place every side 50mm of beam section to be assembled complete after application) at these positions, high pressure airless spraying apparatus is then adopted to spray.
After seal coat spraying, certain set time should be had, ensure that coating is done solid work, without holiday, no sag, without bubbling, pollution-free impurity, thickness, sticking power meet the requirements, and then spraying polyurethane finish paint.
Pressurized gas can not contain oil gas, and wants dry, and gaseous tension is stablized, roughly at 0.50 ~ 0.60Mpa.Spray distance roughly remains within the scope of 70 ~ 200mm.
During spraying, the matrix surface such as spray gun and girder steel answers direction at a right angle, and position gradient that cannot be vertical should not be less than 45 DEG C; Spray gun is movement evenly, and speed is 300 ~ 400mm/s.
About 10 ~ 35 DEG C of painting environments temperature, should be strictly on guard against that matrix surface condenses; Matrix surface temperature is higher than air dew point more than 3 DEG C, and relative humidity, below 85%, also should stop spraying operation when the too large impact of wind-force operates.Spraying is forbidden to carry out under the weather such as rain, snow or condensation.Painting environments requires clean dustless or few dirt.
7th step: quality examination
Comprise (see the 5th steps) such as visual inspection, thickness inspection and anchoring strength of coating (bounding force).
Seal coat and finish paint require smooth, even, clean, paint film bubble-free, crackle, no sag, come off, the defect such as holiday.Finish paint color is consistent with colorimetric card.
8th step: site clearing, completion
The beneficial effect of the invention is, the bonding force of this coating and steel construction matrix is high, on average reaches 12.0Mpa, is much higher than national standard, and work-ing life was more than 50 years.
Claims (5)
1. a steel structure anti-corrosion process, its step comprises surface cleaning process, derusting by sandblast, spray-applied primer and spray paint; Be characterized in, also comprise electric arc aluminium spraying step, after electric arc aluminium spraying step is arranged on derusting by sandblast step and before spray-applied primer step; Described electric arc aluminium spraying adopts arc pistol, take electric arc as thermal source, the wire aluminium wire of purity >=99.5% is heated to molten state, with pressurized air, the aluminium of melting is blown out vaporific simultaneously, and forming affined grain flow, even application forms one deck aluminium lamination at matrix surface.
2. steel structure anti-corrosion process as claimed in claim 1, it is characterized in that: during described electric arc aluminium spraying, the distance controlling of spray gun and matrix surface is at 200 ~ 250mm, spray angle controls at 45 degree of-90 degree, spray gun translational speed controls at 300 ~ 400mm/s, and the transfer rate of aluminium wire controls at 5m/min; Arc voltage controls at 24 ~ 34V, and flame current controls at 100 ~ 300A, and compressed air pressure controls at 0.6 ~ 0.7Mpa.
3. steel structure anti-corrosion process as claimed in claim 1, is characterized in that: described electric arc aluminium spraying adopts layering spraying, and before spraying, the spraying direction of one deck forms 45 degree to 90 degree intersecting with the spraying direction of spraying later layer; The aluminum layer thickness having sprayed rear formation controls at 100 μm ~ 120 μm, and Roughness Surface on Control is at Rz50 μm.
4. steel structure anti-corrosion process as claimed in claim 1, it is characterized in that: described derusting by sandblast adopts band corner angle steel sand, and sand grains size controls at 0.5-2.0mm, and sandblasting gaseous tension controls at 0.65MPa, sandblasting distance controlling is at 200 ~ 250mm, and sandblasting Angle ambiguity is at 90 degree.
5. steel structure anti-corrosion process as claimed in claim 1, it is characterized in that: described spray-applied primer and spray paint adopt high pressure airless spraying apparatus to spray respectively, pressure-controlling is at 0.50 ~ 0.60Mpa, spray distance controls at 70 ~ 200mm, the Angle ambiguity of spray gun and matrix surface is at 45 degree to 90 degree, and the even translational speed of spray gun controls at 300 ~ 400mm/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410399893.1A CN105331924A (en) | 2014-08-15 | 2014-08-15 | Corrosion resistance technology of steel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410399893.1A CN105331924A (en) | 2014-08-15 | 2014-08-15 | Corrosion resistance technology of steel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105331924A true CN105331924A (en) | 2016-02-17 |
Family
ID=55282682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410399893.1A Pending CN105331924A (en) | 2014-08-15 | 2014-08-15 | Corrosion resistance technology of steel structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105331924A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665258A (en) * | 2016-04-08 | 2016-06-15 | 天津达璞瑞科技有限公司 | Anticorrosive coating for chemical storage tank and construction method thereof |
| CN107287550A (en) * | 2017-07-18 | 2017-10-24 | 合肥万之景门窗有限公司 | A kind of surface preservative treatment technique of aluminium alloy plate |
| CN108393246A (en) * | 2018-04-12 | 2018-08-14 | 余中华 | A kind of technique that stamping forming metal blank is surface-treated |
-
2014
- 2014-08-15 CN CN201410399893.1A patent/CN105331924A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665258A (en) * | 2016-04-08 | 2016-06-15 | 天津达璞瑞科技有限公司 | Anticorrosive coating for chemical storage tank and construction method thereof |
| CN107287550A (en) * | 2017-07-18 | 2017-10-24 | 合肥万之景门窗有限公司 | A kind of surface preservative treatment technique of aluminium alloy plate |
| CN108393246A (en) * | 2018-04-12 | 2018-08-14 | 余中华 | A kind of technique that stamping forming metal blank is surface-treated |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105256268A (en) | Construction process for anticorrosion composite coating of steel structure | |
| CN104073757B (en) | Strengthen the method for ocean structure steel resistance to corrosion fatigue performance | |
| CN102154608A (en) | Steel structure anti-corrosion process | |
| CN107061929B (en) | steel circulating water pipe anti-corrosion method | |
| CN101822936A (en) | High-temperature scale anticorrosion construction method for heat-engine plant desulfurizer | |
| CN110640600A (en) | Novel corrosion prevention process for offshore wind power tower | |
| CN201437084U (en) | Composite corrosion-resistant lining | |
| CN106811716A (en) | The construction technology of anticorrosive composite coating of steel structure | |
| CN102211083A (en) | Automatic coating process of composite coating of large-size steel pipe | |
| CN112403866A (en) | Surface treatment method for anti-corrosion steel beam component and anti-corrosion steel beam component | |
| CN105331924A (en) | Corrosion resistance technology of steel structure | |
| CN105586561A (en) | Steel structure anti-corrosion process | |
| CN105521933A (en) | Processing method for anti-corrosive fluorocarbon coating of anchor bolt | |
| CN104941805A (en) | Wet electric precipitation system mounting method | |
| CN110586443A (en) | Novel onshore corrosion prevention process for wind power tower cylinder | |
| CN105331923A (en) | Steel structure anticorrosive process | |
| CN105065852A (en) | Construction method for laying pressure penstock inside water tunnel of hydropower station | |
| CN112981302A (en) | Site construction process of steel structure anticorrosion composite coating in south sea atmospheric environment | |
| CN102211080A (en) | Anticorrosion method of composite coating positioned on surface of steel structure | |
| CN114210530A (en) | Corrosion-resistant coating process for construction main body and auxiliary structure of offshore wind turbine generator | |
| CN112159947A (en) | Electric arc spraying method | |
| Hudson | Coatings for the protection of structural steelworks | |
| CN110004395A (en) | The construction technology of anticorrosive composite coating of steel structure | |
| CN110385247A (en) | A kind of cigarette air channel barrier door nanometer heavy antisepsis technique | |
| CN105109853B (en) | Large-scale storage tank lining plastic anticorrosion process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160217 |
|
| WD01 | Invention patent application deemed withdrawn after publication |