CN102041472A - Surface treatment method of steel structural member - Google Patents
Surface treatment method of steel structural member Download PDFInfo
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- CN102041472A CN102041472A CN200910110550.8A CN200910110550A CN102041472A CN 102041472 A CN102041472 A CN 102041472A CN 200910110550 A CN200910110550 A CN 200910110550A CN 102041472 A CN102041472 A CN 102041472A
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Abstract
The invention relates to a surface treatment method of a steel structural member. The method comprises the following steps of: (A) clearing away oil and rust on the surface of a steel structural member; (B) treating the surface of the steel structural member by adopting a zinc-aluminum permeating method to form a permeating layer on the surface of the steel structural member; (C) removing an oxidation film on the surface of the steel structural member treated by adopting the zinc-aluminum permeating method by using a shot blasting method; (D) treating the surface of the steel structural member after shot blasting by adopting a dacromet technology to form a dacromet coating on the surface of the steel structural member; and (E) coating paint with good permeability on the surface of the dacromet coating to seal micropores on the surface and form a surface protective layer of the steel structural member together with the permeating layer and the dacromet coating. The invention takes full advantages of the permeating layer, the dacromet and the coating and ensures that a surface protective layer with good wear resistance and corrosion resistance is formed on the surface of the steel structural member. The steel structural member which is treated by adopting the method and applied to lamps can be applied to wider fields.
Description
Technical field
The present invention relates to process for treating surface, relate in particular to the surface treatment method of the steel structural part of lighting.
Background technology
The lighting of specialty is generally used in oceanic climate, humidity, has under the mal-condition of salt fog, therefore very high to the material performance requirement of lighting, the lighting that adopts general material to make is easy to damage in extreme environment, has a strong impact on works progress.
For improving performances such as material is anticorrosive, anti-oxidant, generally can be to material, especially the steel structural part of making, carry out surface treatment, the conventional process for treating surface that adopts is a Dacromet Technology, and this technology is a kind of comparatively sophisticated metal surface anticorrosive technology, because of it has plurality of advantages, as: (1) extraordinary corrosion-resistant: neutral salt spray test proves that its corrosion resistance nature is galvanized 8～10 times, and thickness can reach more than 1000 hours in the Dacroment coating resisting salt fog corrosion time of 8～10m; (2) the good performance that is coated with deeply; (3) no hydrogen embrittlement; (4) pollution-free etc., Dacromet Technology has obtained widely using in every fields such as electric power, building, oceanographic engineering, household electrical appliance, railway, bridge, tunnel, war industry and powder metallurgy industry, has replaced process for treating surface such as traditional zinc-plated, cadmium plating.
But adopt the scratch resistance of Dacromet Technology coatings prepared poor, and coated standardized component is after long-distance transport arrives the point of destination, spot corrosion appears in regular meeting, and the surface property that this has largely influenced product has limited Dacromet Technology and used and promote.
Summary of the invention
The technical problem to be solved in the present invention is, at the above-mentioned defective of prior art, provides a kind of protection processing method that can form the steel structural part with good wear-resisting, corrosion resistant composite bed on the steel structural part surface.
The technical solution adopted for the present invention to solve the technical problems is:
Construct a kind of surface treatment method of steel structural part, wherein, may further comprise the steps:
A, the removing lip-deep oil of steel structural part and rust;
B, employing zinc-aluminized method are handled the steel structural part surface after oil removing and rust cleaning, and oozing temperature altogether is 430 ± 20 ℃, and the time of oozing is 1.5～2 hours altogether, forms co-penetration layer on the steel structural part surface;
The method of C, employing ball blast is removed the oxide film that adopts the steel structural part surface after the zinc-aluminized method is handled;
D, employing Dacromet Technology are handled the steel structural part surface behind oxide film, form the Dacroment coating on the steel structural part surface;
E, coat the good coating of impregnability, sealing the micropore on the described Dacroment coatingsurface, constitute the sealer of steel structural part with described co-penetration layer, Dacroment coating at described Dacroment coatingsurface.
Surface treatment method of the present invention, wherein, described steps A comprises:
A1, be 80～90 ℃ in temperature, concentration is the NaOH of 40～60 grams per liters, the Na of 20～30 grams per liters
2CO
3, 50～70 grams per liters Na
2PO
412H
2The Na of O and 5～7 grams per liters
2SiO
3In the mixing solutions, clean the oil on described steel structural part surface, after finishing, adopt clear water to clean again;
A2, in concentration is the HCl solution of 230～270 grams per liters, processing of rust removing is carried out on the steel structural part surface, after finishing, adopt clear water to clean again.
Surface treatment method of the present invention wherein, among the described step B, adopts the penetration enhancer that comprises zinc powder and aluminium powder, and with NH
4Cl is as activator, with α-Al
2O
3As filler; Wherein, the mass fraction of each component is: 40～50 parts of zinc powders, 8～12 parts of aluminium powders, NH
41～2 part of Cl, α-Al
2O
337～51 parts.
Surface treatment method of the present invention, wherein, among the described step C, the employing diameter is 0.05～0.2 millimeter a shot, removes the oxide film that adopts the steel structural part surface after the zinc-aluminized method is handled.
Surface treatment method of the present invention, wherein, among the described step D, the Dacroment masking liquid viscosity that is adopted is 38～42s, and density is 1.35～1.40 gram per centimeters, and the pH value is 4.5～5.2, content of 6-valence Cr ions 〉=23 grams per liters.
Surface treatment method of the present invention, wherein, described step D comprises:
D1, steel structural part is immersed in the described Dacroment masking liquid, be coated with liquid temp and be controlled at 18～22 ℃, dipping time 1～3 minute is again to the steel structural part centrifugal treating behind the dipping, get rid of unnecessary Dacroment masking liquid, the control centrifugal rotational speed is 240～280 rev/mins;
D2, with the preheating 13～18 minutes under 90 ℃ of temperature of the steel structural part after the centrifugal treating, 290～310 ℃ of sintering temperatures 15～20 minutes, back air cooling formed the Dacroment coating to room temperature on the steel structural part surface again.
Surface treatment method of the present invention, wherein, in the described steps A 1, adopting the clear water scavenging period is 1～4 minute, in the described steps A 2, adopting the clear water scavenging period is 1～4 minute.
Surface treatment method of the present invention, wherein, among the described step D, in the described step e, the surface protection layer thickness of described steel structural part is 40～80 microns.
Surface treatment method of the present invention, wherein, described coating is for having good weatherability properties and infiltrative coating.
Surface treatment method of the present invention, wherein, before described step e is carried out, once with described step D repetitive operation.
Surface treatment method of the present invention has been given full play to the advantage of impregnation coating, Dacroment and coating; make on the steel structural part surface to form to have good wear-resisting, corrosion resistant sealer, significantly improve the work-ing life of steel structural part in exceedingly odious environment.Especially adopt the steel structural part that is applied to light fixture after the inventive method is handled, more can be applicable to extensive fields more.
Embodiment
Below the preferred embodiments of the present invention are described in detail.
The various solution or the powder body material that are adopted in the surface treatment method of steel structural part of the present invention are commercial.Adopted have good weatherability properties and infiltrative coating comprises: epoxy acrylic coatings, organic-silicon-modified finish paint, acroleic acid polyurethane finish paint and acrylic acid top-coat.Be example with surface treatment below, describe by three specific embodiments to structural carbon steel (Q235) structural part.
Embodiment 1
Step a1, pre-treatment:
In temperature is 85 ℃, and concentration is the NaOH of 40 grams per liters, the Na of 20 grams per liters
2CO
3, 50 grams per liters Na
2PO
412H
2The Na of O and 5 grams per liters
2SiO
3In the mixing solutions, clean the oil on described steel structural part surface, after finishing, adopt clear water to clean again 1 minute;
Again at room temperature concentration be in the HCl solution of 230 grams per liters to the steel structural part surface derusting, after finishing, adopt clear water to clean again 1 minute.
Step b1, zinc-aluminized:
Employing comprises the penetration enhancer of zinc powder and aluminium powder, and with NH
4Cl is as activator, with α-Al
2O
3As filler, adopt the zinc-aluminized method to handle through oil removing and the steel structural part surface after eliminating rust, oozing temperature altogether is 410 ℃, the time of oozing is 1.5 hours altogether, forms co-penetration layer on the steel structural part surface;
Wherein, the parts by weight of each component of penetration enhancer are: 40 parts of zinc powders, 8 parts of aluminium powders, NH
4Cl1 part, α-Al
2O
351 parts.
Step c1, mechanical ball blast:
The employing diameter is 0.05 millimeter a shot, adopts the method for ball blast to remove the oxide film on the steel structural part surface after the zinc-aluminized method is handled.
Steps d 1, Dacroment are handled:
It is 38s that steel structural part is immersed in viscosity, density is 1.35 gram per centimeters, the pH value is 4.5, content of 6-valence Cr ions is in the Dacroment masking liquid of 23 grams per liters, be coated with liquid temp and be controlled at 18 ℃, dipping time 1 minute is again to the steel structural part centrifugal treating behind the dipping, the control centrifugal rotational speed is 240 rev/mins, gets rid of unnecessary Dacroment masking liquid;
Again with the preheating 13 minutes under 80 ℃ of temperature of the steel structural part after the centrifugal treating, 290 ℃ of sintering temperatures 15 minutes, back air cooling formed the Dacroment coating to room temperature on the steel structural part surface again.
Step e1, application:
Coat the good epoxy acrylic coatings of impregnability at described Dacroment coatingsurface; form dope layer; to seal the micropore on the described Dacroment coatingsurface; this dope layer forms with co-penetration layer, Dacroment coating to have good wear-resistingly, corrosion-resistant, and thickness is 50 microns steel structural part sealer.
After testing; the sealer even compact that is obtained; sealer and matrix bond are firm; have excellent anti-neutral salt spray, weathering resistance and wear resistance; after it adds the coating sealing of hole; therefore improved acidproof, the alkali resistance of steel structural part, be particularly suitable in oceanic climate, humidity, have under the mal-condition of salt fog and use.
Embodiment 2
Step a2, pre-treatment:
In temperature is 85 ℃, and concentration is the NaOH of 50 grams per liters, the Na of 25 grams per liters
2CO
3, 60 grams per liters Na
2PO
412H
2The Na of O and 6 grams per liters
2SiO
3In the mixing solutions, clean the oil on described steel structural part surface, after finishing, adopt clear water to clean again 1～4 minute;
In concentration is the HCl solution of 250 grams per liters, processing of rust removing is carried out on the steel structural part surface again, after finishing, adopt clear water to clean again 2 minutes.
Step b2, zinc-aluminized:
Employing comprises the penetration enhancer of zinc powder and aluminium powder, and with NH
4Cl is as activator, with α-Al
2O
3As filler; Adopt the zinc-aluminized method to handle through oil removing and the steel structural part surface after eliminating rust, oozing temperature altogether is 430 ℃, and the time of oozing is 1.6 hours altogether, forms the co-penetration layer on steel structural part surface;
Wherein, the parts by weight of each component are: 45 parts of zinc powders, 10 parts of aluminium powders, NH
41.5 parts of Cl, α-Al
2O
344.5 part.
Step c2, mechanical ball blast:
The employing diameter is 0.1 millimeter a shot, adopts the method for ball blast to remove the oxide film on the steel structural part surface after the zinc-aluminized method is handled.
Steps d 2, Dacroment are handled:
With steel structural part be immersed in that the liquid viscosity is that 40s, density are that 1.38 gram per centimeters, pH value are 5.0, in the Dacroment masking liquid of content of 6-valence Cr ions 26 grams per liters, be coated with liquid temp and be controlled at 20 ℃, dipping time 2 minutes, again to the steel structural part centrifugal treating behind the dipping, the control centrifugal rotational speed is 260 rev/mins, gets rid of unnecessary Dacroment masking liquid;
Again with the preheating 15 minutes under 90 ℃ of temperature of the steel structural part after the centrifugal treating, 300 ℃ of sintering temperatures 17 minutes, back air cooling formed the Dacroment coating on steel structural part surface to room temperature again.
Step e2, application:
Coat the good organic-silicon-modified finish paint of impregnability at described Dacroment coatingsurface; form top coat layer to seal the micropore on the described Dacroment coatingsurface; this enamelled coating forms with co-penetration layer, Dacroment coating to have good wear-resistingly, corrosion-resistant, and thickness is 40 microns steel structural part sealer.
After testing; the sealer even compact that is obtained; sealer and matrix bond are firm; have excellent anti-neutral salt spray, weathering resistance and wear resistance; after it adds the coating sealing of hole; therefore improved acidproof, the alkali resistance of steel structural part, be particularly suitable in oceanic climate, humidity, have under the mal-condition of salt fog and use.
Embodiment 3
Step a3, pre-treatment:
In temperature is 90 ℃, and concentration is that NaOH, the concentration of 60 grams per liters is the Na of 30 grams per liters
2CO
3, concentration is the Na of 70 grams per liters
2PO
412H
2O and concentration are the Na of 7 grams per liters
2SiO
3In the mixing solutions, clean the oil on described steel structural part surface, after finishing, adopt clear water to clean again 4 minutes;
In concentration is the HCl solution of 270 grams per liters, processing of rust removing is carried out on the steel structural part surface again, after finishing, adopt clear water to clean again 4 minutes.
Step b3, zinc-aluminized:
Employing comprises the penetration enhancer of zinc powder and aluminium powder, and with NH
4Cl is as activator, with α-Al
2O
3As filler; Adopt the zinc-aluminized method to handle through oil removing and the steel structural part surface after eliminating rust, oozing temperature altogether is 450 ℃, and the time of oozing is 2 hours altogether, forms the co-penetration layer on steel structural part surface;
Wherein, the parts by weight of each component are: 50 parts of zinc powders, 12 parts of aluminium powders, NH
42 parts of Cl, α-Al
2O
337 parts.
Step c3, mechanical ball blast:
The employing diameter is 0.2 millimeter a shot, adopts the method for ball blast to remove the oxide film on the steel structural part surface after the zinc-aluminized method is handled.
Steps d 3, Dacroment are handled:
With steel structural part steeping fluid viscosity is 42s, density is 1.40 gram per centimeters, the pH value is 5.2, in the Dacroment masking liquid of content of 6-valence Cr ions 30 grams per liters, be coated with liquid temp and be controlled at 22 ℃, dipping time 3 minutes is again to the steel structural part centrifugal treating behind the dipping, the control centrifugal rotational speed is 280 rev/mins, gets rid of unnecessary Dacroment masking liquid;
Again with the preheating 18 minutes under 100 ℃ of temperature of the steel structural part after the centrifugal treating, 310 ℃ of sintering temperatures 20 minutes, back air cooling formed the Dacroment coating on steel structural part surface to room temperature again.
Step e3, application:
Coat the good acroleic acid polyurethane finish paint of impregnability at described Dacroment coatingsurface; form the lacquer painting layer; to seal the micropore on the described Dacroment coatingsurface; this enamelled coating forms with co-penetration layer, Dacroment coating to have good wear-resistingly, corrosion-resistant, and thickness is 80 microns steel structural part sealer.
After testing; the sealer even compact that is obtained; firm with matrix bond; have excellent anti-neutral salt spray, weathering resistance and wear resistance; after it adds the coating sealing of hole; therefore improved acidproof, the alkali resistance of steel structural part, be particularly suitable in oceanic climate, humidity, have under the mal-condition of salt fog and use.
Embodiment 4
Step a4, pre-treatment:
In temperature is 85 ℃, and concentration is the NaOH of 50 grams per liters, the Na of 25 grams per liters
2CO
3, 60 grams per liters Na
2PO
412H
2The Na of O and 7 grams per liters
2SiO
3In the mixing solutions, clean the oil on described steel structural part surface, after finishing, adopt clear water to clean again 3 minutes;
In concentration is the HCl solution of 250 grams per liters, processing of rust removing is carried out on the steel structural part surface again, after finishing, adopt clear water to clean again 3 minutes.
Step b4, zinc-aluminized:
Employing comprises the penetration enhancer of zinc powder and aluminium powder, and with NH
4Cl is as activator, with α-Al
2O
3As filler; Adopt the zinc-aluminized method to handle through oil removing and the steel structural part surface after eliminating rust, oozing temperature altogether is 430 ℃, and the time of oozing is 2 hours altogether, forms the co-penetration layer on steel structural part surface;
Wherein, the parts by weight of each component are: 50 parts of zinc powders, 12 parts of aluminium powders, 2 parts of NH4Cl, α-Al2O337 part.
Step c4, mechanical ball blast:
The employing diameter is 0.1 millimeter a shot, adopts the method for ball blast to remove the oxide film on the steel structural part surface after the zinc-aluminized method is handled.
Steps d 4, Dacroment are handled:
It is 42s that steel structural part is immersed in the liquid viscosity, density is 1.40 gram per centimeters, the pH value is 45, in the Dacroment masking liquid of content of 6-valence Cr ions 30 grams per liters, be coated with liquid temp and be controlled at 21 ℃, dipping time 2 minutes is again to the steel structural part centrifugal treating after applying, the control centrifugal rotational speed is 260 rev/mins, gets rid of unnecessary Dacroment masking liquid;
Again with the preheating 15 minutes under 90 ℃ of temperature of the steel structural part after the centrifugal treating, 300 ℃ of sintering temperatures 17 minutes, back air cooling formed the Dacroment coating on steel structural part surface to room temperature again.
Step e4, the Q235 structural part is repeated step (d) once.
Step f4, application:
Coat the good acrylic acid top-coat of impregnability at described Dacroment coatingsurface; form top coat layer; to seal the micropore on the described Dacroment coatingsurface; this top coat layer forms with co-penetration layer, Dacroment coating to have good wear-resistingly, corrosion-resistant, and thickness is 65 microns steel structural part sealer.
After testing; the sealer even compact that is obtained; firm with matrix bond; have excellent anti-neutral salt spray, weathering resistance and wear resistance; after it adds the coating sealing of hole; therefore improved acidproof, the alkali resistance of steel structural part, be particularly suitable in oceanic climate, humidity, have under the mal-condition of salt fog and use.
Surface treatment method of the present invention has been given full play to the advantage of impregnation coating, Dacroment and coating; make on the steel structural part surface to form to have good wear-resisting, corrosion resistant good surface protective layer, significantly improve the work-ing life of steel structural part in exceedingly odious environment.Adopt the steel structural part that is applied to light fixture after the inventive method is handled, can be applicable to extensive fields more.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (10)
1. the surface treatment method of a steel structural part is characterized in that, may further comprise the steps:
A, the removing lip-deep oil of steel structural part and rust;
B, employing zinc-aluminized method are handled the steel structural part surface after oil removing and rust cleaning, and oozing temperature altogether is 410～450 ℃, and the time is 1.5～2 hours, forms co-penetration layer on the steel structural part surface;
The method of C, employing ball blast is removed the oxide film on the steel structural part surface after the zinc-aluminized method is handled;
D, employing Dacromet Technology are handled the steel structural part surface behind oxide film, form the Dacroment coating on the steel structural part surface;
E, coat the good coating of impregnability at described Dacroment coatingsurface, form dope layer, sealing the micropore on the described Dacroment coatingsurface, this dope layer constitutes the sealer of steel structural part with described co-penetration layer, Dacroment coating.
2. surface treatment method as claimed in claim 1 is characterized in that, described steps A comprises:
A1, be 80～90 ℃ in temperature, concentration is the NaOH of 40～60 grams per liters, the Na of 20～30 grams per liters
2CO
3, 50～70 grams per liters Na
2PO
412H
2The Na of O and 5～7 grams per liters
2SiO
3Mixing solutions in, clean the oil on described steel structural part surface, after finishing, adopt clear water to clean again;
A2, in concentration is the HCl solution of 230～270 grams per liters, processing of rust removing is carried out on the steel structural part surface, after finishing, adopt clear water to clean again.
3. surface treatment method as claimed in claim 1 is characterized in that, among the described step B, adopts the penetration enhancer that comprises zinc powder and aluminium powder, and with NH
4Cl is as activator, with α-Al
2O
3As filler; Wherein, the mass fraction of each component is: 40～50 parts of zinc powders, 8～12 parts of aluminium powders, NH
41～2 part of Cl, α-Al
2O
337～51 parts.
4. surface treatment method as claimed in claim 1 is characterized in that, among the described step C, the employing diameter is 0.05～0.2 millimeter a shot, removes the oxide film that adopts the steel structural part surface after the zinc-aluminized method is handled.
5. surface treatment method as claimed in claim 1 is characterized in that, among the described step D, the Dacroment masking liquid viscosity that is adopted is 38～42s, and density is 1.35～1.40 gram per centimeters, and the pH value is 4.5～5.2, content of 6-valence Cr ions 〉=23 grams per liters.
6. surface treatment method as claimed in claim 5 is characterized in that, described step D comprises:
D1, steel structural part is immersed in the described Dacroment masking liquid, be coated with liquid temp and be controlled at 18～22 ℃, dipping time 1～3 minute is again to the steel structural part centrifugal treating behind the dipping, the control centrifugal rotational speed is 240～280 rev/mins, gets rid of unnecessary Dacroment masking liquid;
D2, with the preheating 13～18 minutes under 80～100 ℃ of temperature of the steel structural part after the centrifugal treating, 290～310 ℃ of following sintering 15～20 minutes, air cooling formed the Dacroment coating to room temperature on the steel structural part surface then again.
7. surface treatment method as claimed in claim 2 is characterized in that, in the described steps A 1, adopting the clear water scavenging period is 1～4 minute, and in the described steps A 2, adopting the clear water scavenging period is 1～4 minute.
8. surface treatment method as claimed in claim 1 is characterized in that, in the described step e, the surface protection layer thickness of described steel structural part is 40～80 microns.
9. surface treatment method as claimed in claim 1 is characterized in that, in the described step e, described coating is for having good weatherability properties and infiltrative coating.
10. surface treatment method as claimed in claim 1 is characterized in that, before described step e is carried out, with described step D repetitive operation once.
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|---|---|---|---|
| CN2009101105508A CN102041472B (en) | 2009-10-19 | 2009-10-19 | Surface treatment method of steel structural member |
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| CN103668043A (en) * | 2013-12-26 | 2014-03-26 | 昆明理工大学 | Diffusion zincizing coating method |
| CN104259071A (en) * | 2014-08-29 | 2015-01-07 | 无锡新势力电机科技有限公司 | Surface treatment method of motor structural parts |
| CN105436060A (en) * | 2015-12-07 | 2016-03-30 | 潍坊远大金属表面科技有限公司 | Method for treating guard bars, stand columns and fasteners through Dacromet coating liquid |
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| CN103668043A (en) * | 2013-12-26 | 2014-03-26 | 昆明理工大学 | Diffusion zincizing coating method |
| CN104259071A (en) * | 2014-08-29 | 2015-01-07 | 无锡新势力电机科技有限公司 | Surface treatment method of motor structural parts |
| WO2016110840A1 (en) * | 2015-01-05 | 2016-07-14 | Hakohav Valves Industries Metal (1987) Ltd. | Corrosion-resistant valve disc |
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| CN106211931A (en) * | 2016-07-21 | 2016-12-14 | 柳州名品科技有限公司 | A kind of preparation method of the small harvester crank rotor plate of coating |
| CN107893210A (en) * | 2017-11-20 | 2018-04-10 | 中国石油大学(华东) | A kind of ferrous materials low temperature zinc-aluminium agent for co-cementation and co-infiltrating method |
| CN108326749A (en) * | 2017-12-11 | 2018-07-27 | 安徽宝辰机电设备科技有限公司 | A kind of high-intensity welding chucking surface processing method |
| CN108097927A (en) * | 2017-12-18 | 2018-06-01 | 中国兵器工业第五九研究所 | Steel-aluminium alloy inlays the insert surface preprocess method of casting |
| CN110375805A (en) * | 2019-07-18 | 2019-10-25 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Tropical islands and reefs climatic environment automatic detection device |
| CN115555232A (en) * | 2022-10-11 | 2023-01-03 | 浙江旗创新材料科技有限公司 | Preparation method of leakage-free high-resistance anticorrosive coating |
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