CN110809635A - Passivating agent, metal plated part surface treatment method and metal workpiece - Google Patents
Passivating agent, metal plated part surface treatment method and metal workpiece Download PDFInfo
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- CN110809635A CN110809635A CN201780092852.XA CN201780092852A CN110809635A CN 110809635 A CN110809635 A CN 110809635A CN 201780092852 A CN201780092852 A CN 201780092852A CN 110809635 A CN110809635 A CN 110809635A
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- passivating agent
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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
- C23C22/05—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 using aqueous solutions
- C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
-
- 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
- C23C22/05—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 using aqueous solutions
- C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/53—Treatment of zinc or alloys based thereon
Abstract
The passivating agent comprises the following components in parts by weight in 1000 parts: 5-20 parts of chromium chloride, 1-5 parts of cobalt sulfate, 1-5 parts of sodium pyrophosphate, 1-5 parts of oxalic acid, 2-10 parts of manganese sulfate, 2-10 parts of silver nitrate and the balance of distilled water. The passivated galvanized sheet forms a black firm protective film on the surface of the plating layer, the performances of corrosion resistance, oxidation resistance, decoration and the like are greatly enhanced, and the passivated galvanized sheet can be widely applied to various metal plated pieces, and is particularly better for passivating the galvanized layer.
Description
Passivating agent, metal plated part surface treatment method and metal workpiece technical field
[0001] The invention relates to the technical field of surface treatment, in particular to a passivating agent, a metal plated part surface treatment method and a metal workpiece.
Background
[0002] In order to improve the surface properties or appearance of the product, the surface of the workpiece is usually treated. For example, surface treatment methods for steel and its plated parts, copper and its plated parts are in great progress in various industries. Passivation is a common surface treatment method.
[0003] The traditional passivation method comprises a boiling water method, a metal salt method and the like, and although the boiling water passivation method is pollution-free, the powder frost phenomenon is easy to occur, the quality appearance and the binding force between a paint layer and a substrate are influenced, and the energy consumption is large. The metal salt method has various ions, and some impurity ions exist, and have certain interference on passivation treatment. And the protective layer generated after the treatment of the passivation agent is not compact, does not resist temperature and has poor corrosion resistance.
Technical problem
[0004] In view of the above, a passivating agent with strong bonding force, temperature resistance and corrosion resistance, a surface treatment method of a metal plated part and a metal workpiece are provided.
Solution to the problem
Technical solution
[0005] The passivator comprises the following components in parts by weight, based on 1000 parts by weight:
5-20 parts of chromium chloride, 1-5 parts of cobalt sulfate, 1-5 parts of sodium pyrophosphate, 1-5 parts of oxalic acid, 2-10 parts of manganese sulfate, 2-10 parts of silver nitrate and the balance of distilled water.
[0006] A surface treatment method for a metal plated part comprises the following steps: preparing the passivating agent, treating the metal plated part by using the passivating agent, controlling the pH value of a solution within the range of 2.0-4.0, and forming a passivation protective film on the surface of the metal plated part after treating for a preset time.
[0007] And a metal workpiece having a metal plating film on a surface thereof, the metal plating film having a passivation film formed thereon according to the metal plating surface treatment method as described above. The beneficial effects of the invention that the metal coating film is preferably a galvanized film
Advantageous effects
[0008] The protective film layer formed by the passivating agent has strong passivation property, oxidation resistance, decoration property and other properties on metal and a plating layer, a black firm protective film is formed on the surface of the plating layer after drying, the corrosion resistance, oxidation resistance, decoration property and other properties are greatly enhanced, and the protective film layer can be widely applied to various metal plating pieces, is particularly better for passivation of a zinc coating, and is a better choice for corrosion resistance and discoloration prevention of the surface of the plating layer. The process of the treatment method is easy to operate, and the treatment method can be used for dip coating and spray brushing. The passivating agent is a water-soluble anticorrosion passivating substance. The product is nontoxic, non-inflammable, no environmental pollution, and convenient for use. The protective film formed after treatment is insoluble in water, has good sulfuration resistance and moisture resistance, good toughness of the film layer and can be bent and deformed. After the passivation treatment of the passivator, the surface gloss and hardness of the passivated metal plated part are improved, and the passivator can be widely applied to various metal plated parts.
Modes for carrying out the invention
[0009] The present invention will be described in detail with reference to specific examples.
[0010] The embodiment of the invention provides a passivating agent, which comprises the following components in parts by weight in 1000 parts: 5-20 parts of chromium chloride, 1-5 parts of cobalt sulfate, 1-5 parts of sodium pyrophosphate, 1-5 parts of oxalic acid, 2-10 parts of manganese sulfate, 2-10 parts of silver nitrate and the balance of distilled water.
[0011] Preferably, the weight part of the chromium chloride is preferably 10 to 15 parts. The weight part of the cobalt sulfate is preferably 2 to 4 parts. The weight part of sodium pyrophosphate is preferably 2 to 4 parts. The weight part of oxalic acid is preferably 2 to 4 parts. The weight portion of manganese sulfate is preferably 4-8 portions. The weight part of silver nitrate is preferably 4-8 parts.
[0012] The passivating agent is controlled in the range of 2.0-4.0 when in use. In the passivating agent, chromium chloride is the main component of the passivating film, sodium pyrophosphate is a pH buffering agent, cobalt sulfate and silver nitrate are blackening agents, wherein the silver nitrate is oxidized neat J, and oxalic acid is a film forming auxiliary agent.
[0013] The embodiment of the invention also provides a surface treatment method of the metal plated part, which comprises the following steps: preparing the passivator, treating the metal plated part by using a passivator solution, controlling the pH value of the solution to be within the range of 2.0-4.0, forming a passivation protective film on the surface of the metal plated part after treating for a preset time, and naturally drying or baking.
[0014] The metal plating part is treated by the passivating agent solution by a dipping method, a spraying method or a brushing method, and the dipping method is preferred. During the treatment of the passivating agent solution, the temperature is preferably controlled to be 40-60 ℃, and the time for treatment is preferably 10-20 seconds.
[0015] In addition, the embodiment of the invention also provides a metal workpiece, wherein the surface of the metal workpiece is provided with a metal coating, such as a coating formed by metal electroplating or chemical plating. The metal plating film is formed with a passivation film according to the above-described surface treatment method for a metal plated article.
[0016] The processing object of the metal plated part can be but is not limited to a galvanized part, after the surface treatment, the surface of the metal workpiece has good protection effect, the formed protective film has strong passivation property, oxidation resistance, decoration property and other properties on metal and a plating layer, a black firm protective film is formed on the surface of the plating layer after drying, the corrosion resistance, oxidation resistance, decoration property and other properties are greatly enhanced, and the method is the best choice for preventing corrosion and discoloration of the surface of the plating layer. The treatment method has simple process and easy operation, and can be used for dip coating and spray coating. The passivating agent is a water-soluble anticorrosion passivating substance. The product is nontoxic, non-inflammable, no environmental pollution, and convenient for use. The protective film formed after treatment is insoluble in water, has good sulfuration resistance and moisture resistance, good toughness of the film layer and can be bent and deformed. Besides being applied to metal workpieces, the passivating agent can also be widely applied to decorative coatings and anti-corrosion coatings of products such as hardware machinery, communication equipment, instruments, household appliances, lamps and the like.
[0017] The composition range, preparation method and usage effect of the passivator are illustrated by the following examples, and the metal workpieces in the following examples are all galvanized workpieces.
[0018] Example 1
[0019] The passivator comprises the following components in parts by weight (calculated by 1000 total weight parts): 5 parts of chromium chloride, 1 part of cobalt sulfate, 1 part of sodium pyrophosphate, 1 part of oxalic acid, 2 parts of manganese sulfate, 2 parts of silver nitrate and the balance of distilled water, stirring and uniformly mixing to prepare the passivator.
[0020] The passivation treatment method comprises the following steps: after a metal workpiece is coated, the metal workpiece is immersed in a passivating agent solution, the pH value of the passivating agent solution is controlled to be 3.0 by phosphoric acid or ammonia water, the temperature is controlled to be 40 ℃, after 30 seconds of treatment, a passivation protective film is formed on the surface of the metal workpiece, and the metal workpiece is taken out and dried at the temperature of 80 ℃ for 15 minutes.
[0021] The treated metal plating piece has bright appearance surface, black and oily appearance, uniform color, no spot corrosion, no spot mark and other abnormalities, and the neutral salt spray test is over 12 inches.
[0022] Example 2
[0023] The passivator comprises the following components in parts by weight (calculated by 1000 total weight parts): 10 parts of chromium chloride, 2 parts of cobalt sulfate, 2 parts of sodium pyrophosphate, 2 parts of oxalic acid, 4 parts of manganese sulfate, 4 parts of silver nitrate and the balance of distilled water, stirring and uniformly mixing to prepare the passivator. [0024] The passivation treatment method comprises the following steps: after a metal workpiece is coated, the metal workpiece is immersed in a passivating agent solution, the pH value of the passivating agent solution is controlled to be 4.0 by phosphoric acid or ammonia water, the temperature is controlled to be 45 ℃, after 30 seconds of treatment, a passivation protective film is formed on the surface of the metal workpiece, and the metal workpiece is taken out and dried at the temperature of 80 ℃ for 15 minutes.
[0025] The treated metal plating piece has bright appearance surface, black and oily appearance, uniform color, no abnormality such as pitting corrosion, spot mark and the like, and the neutral salt spray test is more than 20 inches.
[0026] Example 3
[0027] The passivator comprises the following components in parts by weight (calculated by 1000 total weight parts): 13 parts of chromium chloride, 3 parts of cobalt sulfate, 3 parts of sodium pyrophosphate, 3 parts of oxalic acid, 6 parts of manganese sulfate, 6 parts of silver nitrate and the balance of distilled water, stirring and uniformly mixing to prepare the passivator.
[0028] The passivation treatment method comprises the following steps: after a metal workpiece is coated, the metal workpiece is immersed in a passivating agent solution, the pH value of the passivating agent solution is controlled to be 4.0 by phosphoric acid or ammonia water, the temperature is controlled to be 50 ℃, after 20 seconds of treatment, a passivation protective film is formed on the surface of the metal workpiece, and the metal workpiece is taken out and dried at the temperature of 80 ℃ for 15 minutes.
[0029] The treated metal plating piece has bright appearance surface, black and oily appearance, uniform color, no abnormality such as pitting corrosion, spot mark and the like, and the neutral salt spray test is more than 30 inches.
[0030] Example 4
[0031] The passivator comprises the following components in parts by weight (calculated by 1000 total weight parts): 16 parts of chromium chloride, 4 parts of cobalt sulfate, 4 parts of sodium pyrophosphate, 4 parts of oxalic acid, 8 parts of manganese sulfate, 8 parts of silver nitrate and the balance of distilled water, stirring and uniformly mixing to prepare the passivator.
[0032] The passivation treatment method comprises the following steps: after a metal workpiece is coated, the metal workpiece is immersed in a passivating agent solution, the pH value of the passivating agent solution is controlled to be 4.0 by phosphoric acid or ammonia water, the temperature is controlled to be 50 ℃, after 15 seconds of treatment, a passivation protective film is formed on the surface of the metal workpiece, and the metal workpiece is taken out and dried at the temperature of 70 ℃ for 20 minutes.
[0033] The treated metal plating piece has bright appearance surface, black and oily appearance, uniform color, no abnormality such as pitting corrosion, spot mark and the like, and the neutral salt spray test is over 42 inches.
[0034] Example 5
[0035] The passivator comprises the following components in parts by weight (calculated by 1000 total weight parts): 20 parts of chromium chloride, 5 parts of cobalt sulfate, 5 parts of sodium pyrophosphate, 5 parts of oxalic acid, 10 parts of manganese sulfate, 10 parts of silver nitrate and the balance of distilled water, stirring and uniformly mixing to prepare the passivator.
[0036] The passivation treatment method comprises the following steps: after a metal workpiece is coated, the metal workpiece is immersed in a passivating agent solution, the pH value of the passivating agent solution is controlled to be 5.0 by phosphoric acid or ammonia water, the temperature is controlled to be 40 ℃, after 15 seconds of treatment, a passivation protective film is formed on the surface of the metal workpiece, and the metal workpiece is taken out and dried at the temperature of 80 ℃ for 15 minutes.
[0037] The treated metal plating piece has bright appearance surface, black and oily appearance, uniform color, no abnormality such as pitting corrosion, spot mark and the like, and the neutral salt spray test is more than 40 inches.
[0038] It should be noted that the present invention is not limited to the above-mentioned embodiments, and other changes and modifications can be made by those skilled in the art according to the spirit of the present invention, and these changes and modifications are included in the scope of the present invention as claimed.
Claims (1)
- Claims[ claim 1] A passivator, characterized in that, calculated by 1000 parts by weight, the passivator comprises the following components in parts by weight: 5-20 parts of chromium chloride, and the like,1-5 parts of cobalt sulfate, 1-5 parts of sodium pyrophosphate, 1-5 parts of oxalic acid, 2-10 parts of manganese sulfate, 2-10 parts of silver nitrate and the balance of distilled water.The passivating agent according to claim 2, wherein the chromium chloride is present in an amount of 1 part by weight0-15 parts.[ claim 3] the passivating agent according to claim 1, wherein the cobalt sulfate is 2 parts by weight4 parts by weight.[ claim 4] the passivating agent according to claim 1, wherein the weight part of the sodium pyrophosphate is 2 to 4 parts.The passivating agent according to claim 5, wherein the oxalic acid is present in an amount of 2 to 4 parts by weight.[ claim 6] the passivating agent according to claim 1, wherein the weight part of manganese sulfate is 48 parts of silver nitrate, wherein the weight part of the silver nitrate is 4-8 parts.[ claim 7] the passivating agent according to claim 1, wherein the pH value is 2.0-4.0, and is adjusted by phosphoric acid or ammonia water, and the temperature of the passivating agent is 30-80 ℃.[ claim 8] A surface treatment method for a metal plated article, characterized by comprising the steps of: formulating a deactivant according to any one of claims 1 to 7; and (3) treating the metal plated part by using a passivating agent, controlling the pH value of the solution within the range of 2.0-4.0, and forming a passivation protective film on the surface of the metal plated part after treating for a preset time.The surface treatment method of a metal plated article according to claim 7, wherein the treatment of the metal plated article with the solution of the passivating agent comprises a dipping method, a spraying method or a brushing method, and the temperature is controlled to be 30 to 80 ℃ and the time for treatment is 5 to 30 seconds during the treatment with the solution of the passivating agent.[ claim 10] A metal workpiece having a metal-plated film on a surface thereof, characterized in that the metal-plated film is formed with a passivation film thereon according to the surface treatment method for a metal-plated article according to claim 8.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/091554 WO2019006619A1 (en) | 2017-07-03 | 2017-07-03 | Passivator, surface processing method of metal-plated part and metal workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110809635A true CN110809635A (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780092852.XA Withdrawn CN110809635A (en) | 2017-07-03 | 2017-07-03 | Passivating agent, metal plated part surface treatment method and metal workpiece |
Country Status (2)
| Country | Link |
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| CN (1) | CN110809635A (en) |
| WO (1) | WO2019006619A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101122A (en) * | 2020-02-19 | 2020-05-05 | 广州三孚新材料科技股份有限公司 | Electrogalvanizing black passivation solution and preparation method thereof |
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|---|---|---|---|---|
| US20030148122A1 (en) * | 2001-11-30 | 2003-08-07 | Dipsol Chemicals Co., Ltd. | Processing solution for forming hexavalent chromium free and corrosion resistant conversion film on zinc or zinc alloy plating layers, hexavalent chromium free and corrosion resistant conversion film, method for forming the same |
| CN101899659A (en) * | 2010-06-02 | 2010-12-01 | 山东建筑大学 | Preparation of zinc plated trivalent chromium colour passivator |
| CN102011118A (en) * | 2010-12-24 | 2011-04-13 | 杭州东方表面技术有限公司 | Trivalent chromium passivating agent for zinc and zinc alloy coatings |
| CN102011112A (en) * | 2010-12-15 | 2011-04-13 | 济南德锡科技有限公司 | Zinc and zinc alloy plating black passivation solution and preparation method thereof |
| CN103695892A (en) * | 2013-12-23 | 2014-04-02 | 奎克化学（中国）有限公司 | Passivation solution based on compound sealing technology for zinc-plating material and preparation method thereof |
| CN104342653A (en) * | 2013-07-23 | 2015-02-11 | 无锡市石塘湾工业园区开发建设有限公司 | A preparing process of a high-temperature resistant passivation film on surfaces of a zinc-plating material |
| CN104894549A (en) * | 2015-06-18 | 2015-09-09 | 广西柳州市龙发金属表面处理技术有限公司 | Preparation technology of trivalent chromium black zinc passivating solution |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106637177A (en) * | 2016-12-28 | 2017-05-10 | 武汉迪赛环保新材料股份有限公司 | Trivalent chromium passivation agent for zinc iron alloy coated steel plate and preparation method |
-
2017
- 2017-07-03 WO PCT/CN2017/091554 patent/WO2019006619A1/en active Application Filing
- 2017-07-03 CN CN201780092852.XA patent/CN110809635A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030148122A1 (en) * | 2001-11-30 | 2003-08-07 | Dipsol Chemicals Co., Ltd. | Processing solution for forming hexavalent chromium free and corrosion resistant conversion film on zinc or zinc alloy plating layers, hexavalent chromium free and corrosion resistant conversion film, method for forming the same |
| CN101899659A (en) * | 2010-06-02 | 2010-12-01 | 山东建筑大学 | Preparation of zinc plated trivalent chromium colour passivator |
| CN102011112A (en) * | 2010-12-15 | 2011-04-13 | 济南德锡科技有限公司 | Zinc and zinc alloy plating black passivation solution and preparation method thereof |
| CN102011118A (en) * | 2010-12-24 | 2011-04-13 | 杭州东方表面技术有限公司 | Trivalent chromium passivating agent for zinc and zinc alloy coatings |
| CN104342653A (en) * | 2013-07-23 | 2015-02-11 | 无锡市石塘湾工业园区开发建设有限公司 | A preparing process of a high-temperature resistant passivation film on surfaces of a zinc-plating material |
| CN103695892A (en) * | 2013-12-23 | 2014-04-02 | 奎克化学（中国）有限公司 | Passivation solution based on compound sealing technology for zinc-plating material and preparation method thereof |
| CN104894549A (en) * | 2015-06-18 | 2015-09-09 | 广西柳州市龙发金属表面处理技术有限公司 | Preparation technology of trivalent chromium black zinc passivating solution |
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| WO2019006619A1 (en) | 2019-01-10 |
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Application publication date: 20200218 |