CN110651065A - Phosphating agent, metal piece and surface phosphating method thereof - Google Patents
Phosphating agent, metal piece and surface phosphating method thereof Download PDFInfo
- Publication number
- CN110651065A CN110651065A CN201780090911.XA CN201780090911A CN110651065A CN 110651065 A CN110651065 A CN 110651065A CN 201780090911 A CN201780090911 A CN 201780090911A CN 110651065 A CN110651065 A CN 110651065A
- Authority
- CN
- China
- Prior art keywords
- parts
- phosphating
- phosphating agent
- weight
- metal piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- C23C22/40—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 containing molybdates, tungstates or vanadates
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention relates to a phosphating agent, a metal piece and a surface phosphating method thereof. The phosphating agent is used for surface pretreatment of metal pieces and comprises the following components in parts by weight in 1000 parts: 5-30 parts of phosphoric acid, 3-10 parts of zinc oxide, 0.5-3 parts of molybdenum salt, 0.5-5 parts of magnesium oxide and the balance of water. The film layer formed by the phosphating agent has a delicate structure and firm adhesive force, can generate a continuous, uniform and colored phosphating layer on the surface of a metal piece, and is applied to phosphating treatment before spraying of the surface of a cold-rolled plate, a hot-rolled plate or angle steel. The phosphating solution has long service life and no waste water, and can be used for phosphating by adopting a brushing mode, a soaking mode, a spraying mode or a combination mode thereof. The adoption temperature is 10-50 ℃, the coating can be dried or naturally dried, the energy consumption is greatly saved, the phosphating time is short, no additional surface adjustment is needed before use, no accelerator is needed, and the operation is simple and time-saving.
Description
Phosphating agent, metal piece and surface phosphating method thereof
Technical Field
[0001] The invention relates to the technical field of metal surface treatment, in particular to a phosphating agent, a metal piece and a surface phosphating method thereof.
Background
[0002] To improve the surface properties or appearance of the product, the workpiece is usually surface treated. For example, surface treatment processes for aluminum, iron, and alloys thereof are in great variety of industries. Moreover, most of the work requires a pretreatment before the surface treatment, such as cleaning, decontamination and degreasing, and some applications require metal parts to be treated by phosphating, passivation and the like.
[0003] Phosphating generally adopts a phosphating agent to pretreat a metal piece so as to form a film layer on the surface of the metal piece, so that subsequent surface treatment is carried out, and the bonding force and the corrosion resistance of a subsequent film are increased. For example, prior to spray coating a metallic article, it is necessary to form a phosphate coating on the surface of the article to resist corrosion and increase adhesion between the article and the coating during processing of the article. However, the existing phosphating agents have high energy consumption, more precipitates, short service life, poor corrosion resistance and complex operation (surface adjustment is needed before phosphating, a certain amount of the phosphating agent needs to be added into a phosphating solution in a fixed time and the acidity needs to be strictly controlled).
Technical problem
[0004] In view of the above, a phosphating agent with a delicate structure, firm adhesion, good corrosion resistance, low treatment temperature, low energy consumption and simple operation, a phosphating treatment method for the surface of a metal part and the metal part prepared by phosphating are provided.
Solution to the problem
Technical solution
[0005] A phosphating agent is used for forming phosphating on the surface of a metal part and comprises the following components in parts by weight in 1000 parts: 5-30 parts of phosphoric acid, 3-10 parts of zinc oxide, 0.5-3 parts of molybdenum salt, 0.5-5 parts of magnesium oxide and the balance of water.
[0006] A surface phosphating method for a metal piece comprises the following steps: preparing the phosphating agent, brushing and soaking the metal piece, spraying the phosphating agent solution, performing treatment for a preset time, washing the metal piece with water, and drying. [0007] and, a metal member whose surface has a phosphating formed by the metal member surface phosphating treatment method as described above.
Advantageous effects of the invention
Advantageous effects
[0008] The film formed by the phosphating agent has the advantages of delicate structure, firm adhesive force, good corrosion resistance, low treatment temperature, low energy consumption and simple phosphating operation, and can be used for phosphating before spraying on the surfaces of steel and the like.
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 phosphating agent for surface pretreatment of a metal piece, which comprises the following components in parts by weight in 1000 parts by weight: 5-30 parts of phosphoric acid, 3-10 parts of zinc oxide, 0.5-3 parts of molybdenum salt, 0.5-5 parts of magnesium oxide and the balance of water.
[0011] Specifically, the phosphating agent also comprises 0.2-3 parts of nickel nitrate and 0.5-5 parts of phytic acid. The weight parts of the magnesium oxide are 1-3 parts, the weight parts of the nickel nitrate are 0.5-2 parts, and the weight parts of the phytic acid are 1-3 parts. The purity of the phosphoric acid is more than or equal to 85 percent, and the weight portion of the phosphoric acid is preferably 10-20 portions. The molybdenum salt is preferably sodium molybdate or ammonium heptamolybdate, and the weight part of the zinc oxide is 5-8 parts.
[0012] In the phosphating agent, the better film forming effect is achieved by controlling the proportion balance of the components. For example, when the content of phosphoric acid is low, the film formation is too slow and too thin, and even the film formation cannot be performed, on the contrary, the film formation is too fast due to too fast reaction, the film just formed is dissolved again, and the film is not firm enough, so that the weight part of phosphoric acid is preferably 10 to 20 in this embodiment. Among them, zinc oxide and phosphoric acid function to provide the main components of the phosphating film. Molybdenum salt is used as an accelerator and a secondary component of the film layer, nickel nitrate is used for improving the corrosion resistance of the film layer, magnesium salt and phytic acid fill pores of the phosphating film, and the magnesium salt and the phytic acid also serve as a covering layer. The thickness of the film is increased, and the compactness, the corrosion resistance and the adhesion of the film layer are obviously improved.
[0013] In the embodiment, the phosphating agent has the advantages of fine phosphating structure, firm adhesive force, good corrosion resistance, low treatment temperature, low energy consumption and simple phosphating operation, and can be used for phosphating before spraying on the surfaces of steel and the like.
[0014] The embodiment of the invention also provides a metal piece surface phosphating method, which comprises the following steps: preparing the phosphating agent, brushing and soaking the metal piece, spraying the phosphating agent solution, performing treatment for a preset time, washing the metal piece with water, and drying. 0015, soaking the metal piece into a phosphating agent solution for surface treatment, wherein the temperature of the phosphating agent is controlled to be 10-50 ℃, and is preferably controlled to be about 35 ℃. The metal pieces are preferably immersed in the phosphating solution for a period of 5 to 15 minutes. The embodiment of the invention also provides a metal piece, which is treated by the metal piece surface phosphating method, so that phosphating is formed on the surface of the metal piece. The metal piece can be protected by phosphorization, and the color and luster are bright. The following examples are provided to illustrate the phosphating agents and methods of treating the same according to the embodiments of the present invention.
[0016] Example 1
[0017] Mixing the following components in parts by weight (the total amount is 1000 parts by weight): 5 parts of phosphoric acid, 3 parts of zinc oxide
0.5 part of molybdenum salt, 0.5 part of magnesium oxide and the balance of water are stirred and mixed evenly to prepare the phosphating agent.
[0018] The treatment method comprises the following steps: preparing a phosphating agent; taking a cold-rolled sheet as an example, the cold-rolled sheet is immersed into a phosphating agent solution, the temperature is controlled at 35 ℃, after 10 minutes of immersion treatment, the metal piece is washed by water and dried. In the treatment process, the phosphating agent can be added to the water to ensure the effect of the working solution. The temperature for phosphorization drying should not be too high, and should be controlled at normal temperature to 120 deg.C to prevent film layer from cracking due to too high temperature.
[0019] After the phosphating agent solution is treated, the surface of the workpiece is observed, the surface of the workpiece is found to be colored, uniform in color, fine in phosphating, about 30 seconds within a copper sulfate drop test, and after the spraying treatment, the adhesion is evaluated to be grade 1 according to a 2-inch boiling water adhesion test.
[0020] Example 2
[0021] Mixing the following components in parts by weight (the total amount is 1000 parts by weight): 10 parts of phosphoric acid, 5 parts of zinc oxide, 1 part of molybdenum salt, 1 part of magnesium oxide, 0.2 part of nickel nitrate, 0.5 part of phytic acid and the balance of water, and stirring and uniformly mixing to prepare the phosphating agent.
[0022] The treatment method comprises the following steps: preparing a phosphating agent; taking a cold-rolled sheet as an example, the cold-rolled sheet is immersed into a phosphating agent solution, the temperature is controlled at 35 ℃, after 10 minutes of immersion treatment, the metal piece is washed by water and dried. In the treatment process, the phosphating agent can be added to the water to ensure the effect of the working solution. The temperature for phosphorization drying should not be too high, and should be controlled at normal temperature to 120 deg.C to prevent film layer from cracking due to too high temperature.
[0023] After the phosphating agent solution is treated, the surface of the workpiece is observed, the surface of the workpiece is found to be colored, uniform in color, delicate in phosphating, more than 60 seconds within a copper sulfate drop test, and the adhesion is evaluated to 0 grade according to a 2-inch boiling water adhesion test after spraying treatment.
[0024] Example 3
[0025] Mixing the following components in parts by weight (the total amount is 1000 parts by weight): 20 parts of phosphoric acid, 8 parts of zinc oxide, 2 parts of molybdenum salt, 2 parts of magnesium oxide, 1 part of nickel nitrate, 1 part of phytic acid and the balance of water, stirring and uniformly mixing to prepare the phosphating agent.
[0026] The treatment method comprises the following steps: preparing a phosphating agent; the metal part is, for example, a cold-rolled sheet, which is immersed in a phosphating agent solution
Controlling the temperature at 35 ℃, soaking for 10 minutes, washing the metal piece with water, and drying. In the course of treatment
And the time can be reached to add the phosphating agent so as to ensure the effect of the working solution. The temperature for phosphorization drying should not be too high, and should be controlled at normal temperature to 120 deg.C to prevent film layer from cracking due to too high temperature.
[0027] After the phosphating agent solution is treated, the surface of the workpiece is observed, the surface of the workpiece is found to be colored, uniform in color, delicate in phosphating, more than 60 seconds within a copper sulfate drop test, and the adhesion is evaluated to 0 grade according to a 2-inch boiling water adhesion test after spraying treatment.
[0028] Example 4
[0029] Mixing the following components in parts by weight (the total amount is 1000 parts by weight): 25 parts of phosphoric acid, 9 parts of zinc oxide, 2 parts of molybdenum salt, 3 parts of magnesium oxide, 2 parts of nickel nitrate, 3 parts of phytic acid and the balance of water, stirring and uniformly mixing to prepare the phosphating agent.
[0030] The treatment method comprises the following steps: preparing a phosphating agent; taking a cold-rolled sheet as an example, the cold-rolled sheet is immersed into a phosphating agent solution, the temperature is controlled at 35 ℃, after 10 minutes of immersion treatment, the metal piece is washed by water and dried. In the treatment process, the phosphating agent can be added to the water to ensure the effect of the working solution. The temperature for phosphorization drying should not be too high, and should be controlled at normal temperature to 120 deg.C to prevent film layer from cracking due to too high temperature.
[0031] After the phosphating agent solution is treated, the surface of the workpiece is observed, the surface of the workpiece is found to be colored, uniform in color, delicate in phosphating, more than 60 seconds within a copper sulfate drop test, and the adhesion is evaluated to 0 grade according to a 2-inch boiling water adhesion test after spraying treatment.
[0032] Example 5
[0033] Mixing the following components in parts by weight (the total amount is 1000 parts by weight): 30 parts of phosphoric acid, 10 parts of zinc oxide, 3 parts of molybdenum salt, 5 parts of magnesium oxide, 3 parts of nickel nitrate, 5 parts of phytic acid and the balance of water, stirring and uniformly mixing to prepare the phosphating agent.
[0034] The treatment method comprises the following steps: preparing a phosphating agent; taking a cold-rolled sheet as an example, the cold-rolled sheet is immersed into a phosphating agent solution, the temperature is controlled at 35 ℃, after 10 minutes of immersion treatment, the metal piece is washed by water and dried. In the treatment process, the phosphating agent can be added to the water to ensure the effect of the working solution. The temperature for phosphorization drying should not be too high, and should be controlled at normal temperature to 120 deg.C to prevent film layer from cracking due to too high temperature. 0035 after the treatment of the phosphating agent solution, the surface of the workpiece is observed, the surface of the workpiece is found to be colored, uniform in color and delicate in phosphating, the time of a copper sulfate drop test is more than 60 seconds, and the adhesion is evaluated to 0 grade according to a 2-inch boiling water adhesion test after spraying treatment.
[0036] 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 phosphating agent for forming phosphating on the surface of a metal part, which is characterized by comprising the following components in parts by weight, calculated by 1000 parts by weight: 5-30 parts of phosphoric acid, 3-10 parts of zinc oxide, 0.5-3 parts of molybdenum salt, 0.5-5 parts of magnesium oxide and the balance of water.[ claim 2] the phosphating agent according to claim 1, further comprising 0.2 to 3 parts of nickel nitrate and 0 part of nickel nitrate5-5 parts of phytic acid.[ claim 3] the phosphating agent according to claim 1, wherein the phosphoric acid has a purity of 85% or more.[ claim 4] the phosphating agent according to claim 1, wherein the molybdenum salt is sodium molybdate or heptamolybdenum[ claim 5] the phosphating agent according to claim 1, wherein the phosphoric acid is present in an amount of 10 to 20 parts by weight.[ claim 6] the phosphating agent according to claim 1, wherein the zinc oxide is present in an amount of 5 parts by weight8 parts by weight.[ claim 7] the phosphating agent according to claim 2, wherein the magnesium oxide is present in an amount of 1 part by weight-3 parts, wherein the weight part of the nickel nitrate is 0.5-2 parts, and the weight part of the phytic acid is 1-3 parts.[ claim 8] A surface phosphating method for a metal piece, which comprises the following steps: preparing a phosphating agent according to any one of claims 1 to 7, brushing, dipping and spraying a solution of the phosphating agent on a metal piece, performing a predetermined time interval treatment, washing the metal piece with water and drying.[ claim 9] A metal member characterized in that the surface of the metal member is formed with a phosphide by the metal member surface phosphating method according to claim 8.The metal part according to claim 9, wherein the metal part is a cold rolled sheet, a hot rolled sheet or an angle iron.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/086351 WO2018218429A1 (en) | 2017-05-27 | 2017-05-27 | Phosphating agent, metal component, and surface phosphating treatment method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110651065A true CN110651065A (en) | 2020-01-03 |
Family
ID=64454121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780090911.XA Withdrawn CN110651065A (en) | 2017-05-27 | 2017-05-27 | Phosphating agent, metal piece and surface phosphating method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110651065A (en) |
| WO (1) | WO2018218429A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116024559B (en) * | 2022-12-31 | 2023-11-07 | 广东斗原精密技术有限公司 | Coating agent and steel processing method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5478413A (en) * | 1994-12-27 | 1995-12-26 | Sermatech International, Inc. | Environmentally friendly coating compositions |
| US6780256B2 (en) * | 1999-03-24 | 2004-08-24 | Bulk Chemicals, Inc. | Method of treating a metal surface with a no rinse zinc phosphate coating |
| CN101109081A (en) * | 2007-04-30 | 2008-01-23 | 余取民 | Normal temperature barium salt modified phosphorizing liquid capable of avoiding water wash after phosphorized |
| CN103114282A (en) * | 2013-02-27 | 2013-05-22 | 湖南中骏科技有限公司 | Washing-free normal-temperature phosphating solution after steel workpiece phosphating and preparation method thereof |
| CN103805983A (en) * | 2012-11-08 | 2014-05-21 | 北京中科三环高技术股份有限公司 | Surface treatment method for permanent magnet material by adopting phosphorization agent to carry out phosphorization treatment |
| CN103981516A (en) * | 2014-04-21 | 2014-08-13 | 苏州捷德瑞精密机械有限公司 | Metal rust-removal and phosphatization treatment agent and preparation method thereof |
| CN104651822A (en) * | 2013-11-26 | 2015-05-27 | 刘现梅 | Phosphating solution for cleaning hydraulic cylinder outer wall and preparation method of phosphating solution |
| CN106435550A (en) * | 2016-11-24 | 2017-02-22 | 武汉理工大学 | Phosphorizing liquid, reinforcement surface normal-temperature phosphorizing film and preparation method thereof |
-
2017
- 2017-05-27 WO PCT/CN2017/086351 patent/WO2018218429A1/en active Application Filing
- 2017-05-27 CN CN201780090911.XA patent/CN110651065A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5478413A (en) * | 1994-12-27 | 1995-12-26 | Sermatech International, Inc. | Environmentally friendly coating compositions |
| US6780256B2 (en) * | 1999-03-24 | 2004-08-24 | Bulk Chemicals, Inc. | Method of treating a metal surface with a no rinse zinc phosphate coating |
| CN101109081A (en) * | 2007-04-30 | 2008-01-23 | 余取民 | Normal temperature barium salt modified phosphorizing liquid capable of avoiding water wash after phosphorized |
| CN103805983A (en) * | 2012-11-08 | 2014-05-21 | 北京中科三环高技术股份有限公司 | Surface treatment method for permanent magnet material by adopting phosphorization agent to carry out phosphorization treatment |
| CN103114282A (en) * | 2013-02-27 | 2013-05-22 | 湖南中骏科技有限公司 | Washing-free normal-temperature phosphating solution after steel workpiece phosphating and preparation method thereof |
| CN104651822A (en) * | 2013-11-26 | 2015-05-27 | 刘现梅 | Phosphating solution for cleaning hydraulic cylinder outer wall and preparation method of phosphating solution |
| CN103981516A (en) * | 2014-04-21 | 2014-08-13 | 苏州捷德瑞精密机械有限公司 | Metal rust-removal and phosphatization treatment agent and preparation method thereof |
| CN106435550A (en) * | 2016-11-24 | 2017-02-22 | 武汉理工大学 | Phosphorizing liquid, reinforcement surface normal-temperature phosphorizing film and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018218429A1 (en) | 2018-12-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2686380C (en) | Metallizing pretreatment of zinc surfaces | |
| JPS6136588B2 (en) | ||
| JPH0137478B2 (en) | ||
| JPH11335865A (en) | Processing agent for forming protective coating film on metal and its formation | |
| US2244526A (en) | Process of treating metal surfaces | |
| CN110651065A (en) | Phosphating agent, metal piece and surface phosphating method thereof | |
| CN112725786A (en) | Cobalt-containing phosphating agent, metal piece and surface phosphating method thereof | |
| CN112695312A (en) | Molybdenum-zirconium type phosphorus-free passivator, metal part and surface passivation treatment method thereof | |
| WO2019006674A1 (en) | Magnesium alloy phosphating agent, metal component, and surface phosphating treatment method therefor | |
| CN110809636A (en) | Blackening phosphating agent, metal part and surface phosphating method thereof | |
| CN112708878A (en) | Titanium-containing phosphating agent, metal piece and surface phosphating method thereof | |
| CN112725776A (en) | Phosphating agent for spraying pretreatment, metal piece and surface phosphating method thereof | |
| CN110691863A (en) | Modified phosphating agent, metal piece and surface phosphating method thereof | |
| CN112725784A (en) | Phosphorus-free passivator, metal piece and surface passivation treatment method thereof | |
| WO2017214992A1 (en) | Ceramization agent, metal piece and ceramization treatment method therefor | |
| WO2019000448A1 (en) | Stainless steel passivator and method for passivating surface of stainless steel part | |
| CN112760626A (en) | Phosphorus-free passivating agent for steel surface, steel workpiece and surface passivating treatment method thereof | |
| CN110869532A (en) | Oil-removing, rust-removing and phosphorizing three-in-one coating agent, steel part and leather membranization treatment method thereof | |
| WO2019006622A1 (en) | Passivator, metal workpiece and passivation process therefor | |
| CN112647070A (en) | Trivalent chromium coating agent, aluminum material and surface coating treatment method thereof | |
| WO2019006621A1 (en) | Passivator, surface processing method of metal workpiece and metal workpiece | |
| CN112647069A (en) | Environment-friendly titanium lanthanum film forming agent, aluminum material and surface film forming treatment method thereof | |
| CN112695309A (en) | Magnesium-zirconium environment-friendly film forming agent, aluminum material and surface film treatment method thereof | |
| CN112760625A (en) | Trivalent chromium coating agent, aluminum material and surface coating treatment method thereof | |
| WO2019006619A1 (en) | Passivator, surface processing method of metal-plated part and metal workpiece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200103 |
|
| WW01 | Invention patent application withdrawn after publication |