CN102041472B - Surface treatment method of steel structural member - Google Patents
Surface treatment method of steel structural member Download PDFInfo
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- CN102041472B CN102041472B CN2009101105508A CN200910110550A CN102041472B CN 102041472 B CN102041472 B CN 102041472B CN 2009101105508 A CN2009101105508 A CN 2009101105508A CN 200910110550 A CN200910110550 A CN 200910110550A CN 102041472 B CN102041472 B CN 102041472B
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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 the material performance requirement of illumination light fixture is very high; The lighting that adopts general material to process is easy in extreme environment, damage, and has a strong impact on works progress.
For improving performances such as material is anticorrosive, anti-oxidant, generally can be to material, the steel structural part of especially processing; 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 each item 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 that the present invention will solve is, to the above-mentioned defective of prior art, a kind of protection processing method that can on the steel structural part surface, form the steel structural part with good wear-resisting, corrosion resistant composite bed is provided.
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, at steel structural part surface formation co-penetration layer;
The method of C, employing ball blast is removed the sull on the steel structural part surface of adopting after the zinc-aluminized method is handled;
D, employing Dacromet Technology are handled the steel structural part surface behind sull, form the Dacroment coating on the steel structural part surface;
E, coat epoxy acrylic coatings, organic-silicon-modified finish paint, acroleic acid polyurethane finish paint or acrylic acid top-coat at said Dacroment coatingsurface; Sealing the micropore on the said Dacroment coatingsurface, constitute the sealer of steel structural part with said co-penetration layer, Dacroment coating.
Surface treatment method of the present invention, wherein, said 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 said 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 said step B, adopts the penetration enhancer that comprises zinc powder and aluminium powder, and with NH
4Cl is as acvator, 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 said step C, the employing diameter is 0.05～0.2 millimeter a shot, removes the sull on the steel structural part surface of adopting after the zinc-aluminized method is handled.
Surface treatment method of the present invention, wherein, among the said step D, the Dacroment masking liquid viscosity that is adopted is 38～42s, and density is 1.35～1.40 gram/cubic centimetres, 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, said step D comprises:
D1, steel structural part is immersed in the said Dacroment masking liquid; Be coated with liquid temp and be controlled at 18～22 ℃, time of immersion 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 said steps A 1, adopting the clear water scavenging period is 1～4 minute, in the said steps A 2, adopting the clear water scavenging period is 1～4 minute.
Surface treatment method of the present invention, wherein, among the said step D, in the said step e, the surface protection layer thickness of said steel structural part is 40～80 microns.
Surface treatment method of the present invention, wherein, said coating is for having good weatherability properties and infiltrative coating.
Surface treatment method of the present invention, wherein, before said step e is carried out, once with said 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
Describe in detail in the face of the preferred embodiments of the present invention down.
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 through 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 said 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 acvator, with α-Al
2O
3As filler, adopt the zinc-aluminized method to handle the steel structural part surface after oil removing and rust cleaning, 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 sull 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, and density is 1.35 gram/cubic centimetres, and 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 ℃, time of immersion 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 said Dacroment coatingsurface; Form dope layer; To seal the micropore on the said 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, weatherability and wearability, after it adds the coating sealing of hole; Therefore improved acidproof, the alkali resistance of steel structural part, be particularly suitable in marine climate, humidity, the mal-condition use down of salt fog is arranged.
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 said 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 acvator, with α-Al
2O
3As filler; Adopt the zinc-aluminized method to handle the steel structural part surface after oil removing and rust cleaning, 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 sull 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/cubic centimetres, 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 ℃; Time of immersion 2 minutes; 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;
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 said Dacroment coatingsurface; Form top coat layer to seal the micropore on the said 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, weatherability and wearability, after it adds the coating sealing of hole; Therefore improved acidproof, the alkali resistance of steel structural part, be particularly suitable in marine climate, humidity, the mal-condition use down of salt fog is arranged.
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 said 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 acvator, with α-Al
2O
3As filler; Adopt the zinc-aluminized method to handle the steel structural part surface after oil removing and rust cleaning, 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 sull 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, and density is 1.40 gram/cubic centimetres, and 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 ℃, time of immersion 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 said Dacroment coatingsurface; Form the lacquer painting layer; To seal the micropore on the said 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, weatherability and wearability, after it adds the coating sealing of hole; Therefore improved acidproof, the alkali resistance of steel structural part, be particularly suitable in marine climate, humidity, the mal-condition use down of salt fog is arranged.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 said 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 acvator, with α-Al
2O
3As filler; Adopt the zinc-aluminized method to handle the steel structural part surface after oil removing and rust cleaning, 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 sull 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, and density is 1.40 gram/cubic centimetres, and 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 ℃, time of immersion 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 said Dacroment coatingsurface; Form top coat layer; To seal the micropore on the said 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, weatherability and wearability, after it adds the coating sealing of hole; Therefore improved acidproof, the alkali resistance of steel structural part, be particularly suitable in marine climate, humidity, the mal-condition use down of salt fog is arranged.
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 resist, 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, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention according to above-mentioned explanation.
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, at steel structural part surface formation co-penetration layer;
The method of C, employing ball blast is removed the sull 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 sull, form the Dacroment coating on the steel structural part surface;
E, coat epoxy acrylic coatings, organic-silicon-modified finish paint, acroleic acid polyurethane finish paint or acrylic acid top-coat at said Dacroment coatingsurface; Form dope layer; Sealing the micropore on the said Dacroment coatingsurface, this dope layer constitutes the sealer of steel structural part with said co-penetration layer, Dacroment coating.
2. surface treatment method as claimed in claim 1 is characterized in that, said 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 said 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 said step B, adopts the penetration enhancer that comprises zinc powder and aluminium powder, and with NH
4Cl is as acvator, 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 said step C, the employing diameter is 0.05～0.2 millimeter a shot, removes the sull on the steel structural part surface of adopting after the zinc-aluminized method is handled.
5. surface treatment method as claimed in claim 1 is characterized in that, among the said step D, the Dacroment masking liquid viscosity that is adopted is 38～42s, and density is 1.35～1.40 gram/cubic centimetres, 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, said step D comprises:
D1, steel structural part is immersed in the said Dacroment masking liquid; Be coated with liquid temp and be controlled at 18～22 ℃, time of immersion 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 said steps A 1, adopting the clear water scavenging period is 1～4 minute, and in the said 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 said step e, the surface protection layer thickness of said steel structural part is 40～80 microns.
9. surface treatment method as claimed in claim 1 is characterized in that, in the said step e, said coating is for having good weatherability properties and infiltrative coating.
10. surface treatment method as claimed in claim 1 is characterized in that, before said step e is carried out, with said step D repetitive operation once.
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| CN102041472A (en) | 2011-05-04 |
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