CN103608125A - A process of electrolytic galvanizing with an enhanced anti-corrosive protection - Google Patents
A process of electrolytic galvanizing with an enhanced anti-corrosive protection Download PDFInfo
- Publication number
- CN103608125A CN103608125A CN201280022064.0A CN201280022064A CN103608125A CN 103608125 A CN103608125 A CN 103608125A CN 201280022064 A CN201280022064 A CN 201280022064A CN 103608125 A CN103608125 A CN 103608125A
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- CN
- China
- Prior art keywords
- product
- seconds
- polymer dispersion
- scope
- aqueous polymer
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/51—One specific pretreatment, e.g. phosphatation, chromatation, in combination with one specific coating
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2350/00—Pretreatment of the substrate
- B05D2350/60—Adding a layer before coating
- B05D2350/65—Adding a layer before coating metal layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/10—Use of solutions containing trivalent chromium but free of hexavalent chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Electroplating Methods And Accessories (AREA)
- Chemical Treatment Of Metals (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The present invention refers to a process of electrolytic galvanizing, thick layer passivation and subsequent treatment in order to enhance anti-corrosive protection, wherein said process comprises a pretreatment and cleaning of products to be protected against corrosion, respectively, galvanizing in an alkaline media and final treatment. Said final treatment comprises multiple immersing the product to be protected into a water dispersion of silicate and polyurethane and removing the product therefrom.
Description
Technical field
The present invention relates to a kind of electrogalvanising, thick-layer passivation and subsequent treatment to strengthen the method for anticorrosive protection, wherein, described method comprises pretreatment respectively and cleans needs etch-proof product, zinc-plated and whole processing in alkaline medium.
Background technology
Aforesaid electrogalvanising method is substantially known.Although known method can meet the requirement that user sets, it also has attested defect while using in relative etching medium, especially aspect relative high power consumption.In addition, the layer thickness of anticorrosive protection surpasses 20 μ m on the product that weather load is had to very high even very high request.
Summary of the invention
The object of the invention is to create the electrogalvanising method of the anticorrosive protection with enhancing, can correct the defect of known schemes.
The electrogalvanising method with the anticorrosive protection of enhancing according to the present invention comprises pretreatment, wherein organic impurities, iron rust, scum silica frost etc. is removed from the surface of the product that will protect.Described pretreatment comprise the alkaline solution of sodium metasilicate, NaOH, sodium carbonate and comprise NaOH and the acidic aqueous solution of sodium carbonate in carry out.Rely on described pretreatment, prepare for next method step on the surface of the product that protect.
According to the further step of the electrogalvanising method of the anticorrosive protection with enhancing of the present invention be included in alkaline non-cyanide medium, carry out zinc-plated.According to the present invention is to provide, the described alkalescence without cyanogen medium is high as far as possible.Described alkaline non-cyanide medium comprises silicic acid, comprise the sodium salt of sodium metasilicate, comprise nitrogen aqueous solutions of polymers composition, trisodium salt and triazine nutrient solution and comprise methyl alcohol and the polymer solution of formaldehyde.
Between pretreatment and these steps of zinc-plated processing, after each operation, alternately carry out respectively the cleaning that relies on air flow system, the system of coming down in torrents and sprinkling system.
In addition, the electrogalvanising method with the anticorrosive protection of enhancing according to the present invention comprises whole treatment step, and wherein, the thick passivation layer based on trivalent chromium compound and cobalt compound has represented the basic layer on zinc-plated the applied spelter coating of the product to protecting.The product that will protect described in process between about 19 ℃ to about 30 ℃ of temperature range in operating pool, preferably approximately between 21 ℃ to about 28 ℃.The pH value scope that described operating pool comprises is between about 2.0 to about 3.0, preferably between about 2.3 to about 2.7.Afterwards, rely on product described in purified rinse water, preferably rely on and go mineral matter and deionized water.After previous steps, be described product to be immersed to the aqueous polymer dispersion very first time section of silicate and polyester.According to the present invention is to provide, the silicate in described aqueous polymer dispersion and the ratio between polyester are about 10:1.The scope of described very first time section is between 40 seconds to 80 seconds, preferably between 50 seconds to 70 seconds.In addition,, according to the present invention is to provide, the scope of the pH value of described aqueous polymer dispersion is between about 8.0 to about 11.0, preferably between about 8.5 to about 10.5.
In the method continuing, the described product that will protect is removed to the second time period from the aqueous polymer dispersion of described silicate and polyester.According to the present invention is to provide, the scope of described the second time period is about 10 seconds.
After the aqueous polymer dispersion of described silicate and polyester removes described product, be the described product that will protect heavily to be immersed to the 3rd time period of aqueous polymer dispersion of described silicate and polyester.The scope of described the 3rd time period is between 15 seconds to 50 seconds, preferably between 20 seconds to 40 seconds.
According to the present invention preferably, during the method, the aqueous polymer dispersion of described silicate and polyester must stir continuously.
After above-mentioned disclosed method step, being, from the product that will protect, discharging and/or remove unnecessary described aqueous polymer dispersion, is to dry afterwards.Oven dry relies on hot-air to carry out in the drying chamber of sealing or partial closure in the 4th time period, the scope of the temperature of drying chamber is between about 50 ℃ to about 90 ℃, and preferred range is between about 60 ℃ to about 80 ℃.According to the present invention is to provide, the scope of described the 4th time period is between 6 minutes to 15 minutes, preferably between 8 minutes to 12 minutes.
The specific embodiment
The above-mentioned disclosed electrogalvanising method integral body with the anticorrosive protection of enhancing according to the present invention is carried out under relative low temperature, thereby has significant advantage than current scheme.Thereby the method for low temperature thick-layer passivation is characterised in that remarkable saving energy, because it can at room temperature be carried out.In addition, during the method, use the less etching medium with a small amount of Zn2+ and Fe2+ ion, make waste water not comprise nano particle.Rely on the method disclosed in the present, increased being intended to need for manufacturing hardware and other spelter coatings the anticorrosive protection of product of the sector of high resistance corrosion protection.Anticorrosive protective layer is evenly distributed on above the surface of the whole product that will protect.Rely on the method according to this invention, obtained significant anticorrosive protection, the thickness range of the thickness of the average layer of anticorrosive protection is 10 μ m, can not reduce the anticorrosive protection of the product to using under limiting weather conditions.
Claims (10)
1. an electrogalvanising, thick-layer passivation and subsequent treatment are to strengthen the method for anticorrosive protection; wherein; described method comprises pretreatment respectively and cleans needs etch-proof product; zinc-plated and whole processing in alkaline medium; it is characterized in that; in processing eventually, the thick passivation layer based on trivalent chromium compound and cobalt compound has represented the basic layer on zinc-plated the applied spelter coating of the product to protecting, and described processing eventually comprises:
A) in operating pool, process the product that will protect;
B) product that relies on purified rinse water to protect, preferably relies on and goes mineral matter and deionized water;
C) product that will protect is immersed to the aqueous polymer dispersion very first time section of silicate and polyester, and the aqueous polymer dispersion of described silicate and polyester must stir continuously;
D) product that will protect removed for the second time period from the aqueous polymer dispersion of described silicate and polyester;
E) product that will protect heavily immerses the 3rd time period of aqueous polymer dispersion of described silicate and polyester, and the aqueous polymer dispersion of described silicate and polyester must stir continuously;
F) from the product that will protect, discharge and/or remove unnecessary described silicate and the aqueous polymer dispersion of polyester;
G) product that relies on hot air dries to protect in the 4th time period.
2. method according to claim 1, is characterized in that, the scope of the temperature of operating pool is between about 19 ℃ to about 30 ℃, preferably approximately between 21 ℃ to about 28 ℃.
3. method according to claim 1, is characterized in that, the scope of the pH value of operating pool is between about 2.0 to about 3.0, preferably between about 2.3 to about 2.7.
4. method according to claim 1, is characterized in that, the silicate in described aqueous polymer dispersion and the ratio between polyester are about 10:1.
5. according to method in any one of the preceding claims wherein, it is characterized in that, the scope of the pH value of described aqueous polymer dispersion is between about 8.0 to about 11.0, preferably between about 8.5 to about 10.5.
6. according to method in any one of the preceding claims wherein, it is characterized in that, the scope of described very first time section is between 40 seconds to 80 seconds, preferably between 50 seconds to 70 seconds.
7. according to method in any one of the preceding claims wherein, it is characterized in that, the scope of described the second time period is about 10 seconds.
8. according to method in any one of the preceding claims wherein, it is characterized in that, the scope of described the 3rd time period is between 15 seconds to 50 seconds, preferably between 20 seconds to 40 seconds.
9. according to method in any one of the preceding claims wherein, it is characterized in that, the scope of the temperature of described heat oven dry air is between about 50 ℃ to about 90 ℃, preferably between about 60 ℃ to about 80 ℃.
10. according to method in any one of the preceding claims wherein, it is characterized in that, the scope of described the 4th time period is between 6 minutes to 15 minutes, preferably between 8 minutes to 12 minutes.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI201100179A SI23452A (en) | 2011-05-19 | 2011-05-19 | Process of electrolytic zincing with increased anticorrosive protection |
| SIP201100179 | 2011-05-19 | ||
| PCT/EP2012/057334 WO2012156176A1 (en) | 2011-05-19 | 2012-04-23 | A process of electrolytic galvanizing with an enhanced anti-corrosive protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103608125A true CN103608125A (en) | 2014-02-26 |
Family
ID=45782028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280022064.0A Pending CN103608125A (en) | 2011-05-19 | 2012-04-23 | A process of electrolytic galvanizing with an enhanced anti-corrosive protection |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2712331B1 (en) |
| CN (1) | CN103608125A (en) |
| EA (1) | EA024221B1 (en) |
| SI (1) | SI23452A (en) |
| WO (1) | WO2012156176A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112410710A (en) * | 2020-11-11 | 2021-02-26 | 合肥亿昌兴精密机械有限公司 | Corrosion-resistant high-strength galvanized sheet and galvanized sheet preparation process |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109071973A (en) * | 2016-04-29 | 2018-12-21 | 凯密特尔有限责任公司 | The anticorrosion treatment method for metal surfaces of pickled material with reduction |
| IT201700117705A1 (en) | 2017-10-18 | 2019-04-18 | Me Ga S R L | FRAME WITH ROTATING BASKETS FOR GALVANIZATION |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5108554A (en) * | 1990-09-07 | 1992-04-28 | Collis, Inc. | Continuous method for preparing steel parts for resin coating |
| CN1740401A (en) * | 2000-03-22 | 2006-03-01 | 以利沙控股有限公司 | An energy enhanced process for treating a conductive surface and products formed thereby |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2211762B (en) * | 1987-11-13 | 1991-11-13 | Kobe Steel Ltd | Zinc alloy-plated corrosion preventive steel sheet having an organic coating layer thereon and a method for making the same |
| US6465114B1 (en) * | 1999-05-24 | 2002-10-15 | Nippon Steel Corporation | -Zn coated steel material, ZN coated steel sheet and painted steel sheet excellent in corrosion resistance, and method of producing the same |
| EP1524332B1 (en) * | 2002-07-23 | 2011-09-14 | JFE Steel Corporation | Surface-treated steel sheet excellent in resistance to white rust and method for production thereof |
| DE10309908B4 (en) * | 2003-03-07 | 2006-12-14 | Benteler Stahl/Rohr Gmbh | Process for producing a galvanized and polymer coated steel pipe |
-
2011
- 2011-05-19 SI SI201100179A patent/SI23452A/en not_active IP Right Cessation
-
2012
- 2012-04-23 EP EP12716407.7A patent/EP2712331B1/en not_active Not-in-force
- 2012-04-23 EA EA201370240A patent/EA024221B1/en not_active IP Right Cessation
- 2012-04-23 CN CN201280022064.0A patent/CN103608125A/en active Pending
- 2012-04-23 WO PCT/EP2012/057334 patent/WO2012156176A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5108554A (en) * | 1990-09-07 | 1992-04-28 | Collis, Inc. | Continuous method for preparing steel parts for resin coating |
| CN1740401A (en) * | 2000-03-22 | 2006-03-01 | 以利沙控股有限公司 | An energy enhanced process for treating a conductive surface and products formed thereby |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112410710A (en) * | 2020-11-11 | 2021-02-26 | 合肥亿昌兴精密机械有限公司 | Corrosion-resistant high-strength galvanized sheet and galvanized sheet preparation process |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2712331A1 (en) | 2014-04-02 |
| EP2712331B1 (en) | 2016-11-16 |
| EA024221B1 (en) | 2016-08-31 |
| EA201370240A1 (en) | 2014-02-28 |
| SI23452A (en) | 2012-02-29 |
| WO2012156176A1 (en) | 2012-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140226 |