CN113430507B - Stainless steel chromium-free passivator and surface treatment method - Google Patents
Stainless steel chromium-free passivator and surface treatment method Download PDFInfo
- Publication number
- CN113430507B CN113430507B CN202110499058.5A CN202110499058A CN113430507B CN 113430507 B CN113430507 B CN 113430507B CN 202110499058 A CN202110499058 A CN 202110499058A CN 113430507 B CN113430507 B CN 113430507B
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- chromium
- steel workpiece
- titanium dioxide
- nano titanium
- 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.)
- Active
Links
Images
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
- 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
- C23C22/44—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 containing also fluorides or complex fluorides
-
- 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
- C23C22/78—Pretreatment of the material to be coated
-
- 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
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
Abstract
The invention belongs to the field of stainless steel surface treatment, and particularly discloses a stainless steel chromium-free passivator and a surface treatment method. The stainless steel chromium-free passivator comprises the following components: 3-8 g/L of 45% fluotitanic acid, 300-350 g/L of 68% nitric acid, 10-20 g/L of sodium metavanadate, 10-20 g/L of 50% nickel nitrate, 2-5 g/L of modified nano titanium dioxide and the balance of water; the chromium-free passivating agent disclosed by the invention can form a chromium-free passivating film on the surface of stainless steel, can obviously improve the corrosion resistance of the surface of the stainless steel, and has the characteristics of environmental friendliness, no toxicity, easiness in operation, no influence on the appearance shape of the surface of the stainless steel, high adhesive force of the passivating film and the like.
Description
Technical Field
The invention relates to the field of stainless steel surface treatment, in particular to a stainless steel chromium-free passivator and a surface treatment method.
Background
Stainless steel, a widely used industrial material, is used in various fields of society because of its many advantages such as excellent wear resistance and corrosion resistance, however, in many corrosive environment media, corrosion of stainless steel still frequently occurs. Through a chemical treatment method, a corrosion-resistant conversion coating can be formed on the surface of the stainless steel, the appearance shape of the surface of the stainless steel is basically not changed, and a protective layer needs to be formed on the surface of the stainless steel in order to improve the requirement of the corrosion resistance of the surface of the stainless steel. For example, the patent CN102899653A discloses that by using a chemical chromium-free passivation treatment of stainless steel consisting of ammonium molybdate, sulfamic acid, organic phosphoric acid, sodium citrate and the like, although the formed oxidation film is a chromium-free conversion film, the corrosion resistance is poor, the salt resistance requirement of the stainless steel cannot be met at all, and the surface is easily corroded and oxidized again in the air. Therefore, the development of a chromium-free passivation treating agent with stable performance and capable of remarkably improving the high corrosion resistance of stainless steel is of great significance.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention mainly aims to provide a stainless steel chromium-free passivating agent capable of obviously improving the corrosion resistance of the surface of stainless steel.
The invention also aims to provide a stainless steel surface treatment method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a stainless steel chromium-free passivating agent comprises the following components: 3-8 g/L of 45% fluotitanic acid, 300-350 g/L of 68% nitric acid, 10-20 g/L of sodium metavanadate, 10-20 g/L of 50% nickel nitrate, 2-5 g/L of modified nano titanium dioxide and the balance of water.
In one embodiment, 3g/L of 45% fluotitanic acid, 300g/L of 68% nitric acid, 20g/L of sodium metavanadate, 10g/L of 50% nickel nitrate, 3g/L of modified nano titanium dioxide and the balance of water.
In one embodiment, 5g/L of 45% fluotitanic acid, 350g/L of 68% nitric acid, 10g/L of sodium metavanadate, 20g/L of 50% nickel nitrate, 5g/L of modified nano titanium dioxide and the balance of water.
In one embodiment, the modified nano titanium dioxide is obtained by modifying nano titanium dioxide through polydopamine.
In one embodiment, the dopamine modification of the nano titanium dioxide comprises the following steps: adding nano titanium dioxide into Tris-HCL buffer solution (pH = 8.5), performing ultrasonic dispersion, continuously adding dopamine hydrochloride, stirring and reacting for 6-8 h at 40-50 ℃, separating, washing a solid product, and drying to obtain the poly-dopamine modified nano titanium dioxide.
In one embodiment, the concentration of the nano titanium dioxide in the Tris-HCL buffer solution is 0.01-0.05 g/L.
In one embodiment, the ultrasonic dispersion is ultrasonic dispersion at 500-800W for 30-45 min.
In one embodiment, the concentration of the dopamine hydrochloride in the Tris-HCL buffer solution is 0.01-0.05 g/L.
In one embodiment, the separation may be by centrifugation.
In one embodiment, the drying is vacuum drying at 35-40 ℃ for 12-24 h.
The invention also provides a stainless steel surface treatment method using the stainless steel chromium-free passivator, which comprises the steps of sequentially carrying out degreasing treatment, activating treatment, passivating treatment, sealing treatment and drying treatment on stainless steel.
In one embodiment, the degreasing treatment is to immerse a stainless steel workpiece in a degreasing agent, soak for 6min at the temperature of 60 ℃, and carry out activation treatment after water washing;
the degreasing agent comprises the following components: 10g/L of sodium hydroxide, 20g/L of sodium carbonate, 5g/L of trisodium phosphate, 1.25g/L of sodium metasilicate pentahydrate, 1g/L of OP-10 emulsifier and 2g/L of sodium dodecyl benzene sulfonate.
In one embodiment, the activation treatment is to immerse a stainless steel workpiece into an activating agent, soak the workpiece at the temperature of 30-50 ℃ for 30-60 s, wash the workpiece with water and then perform passivation treatment;
the activator comprises the following components: 50-100 g/L of 50% sulfuric acid, 25-50 g/L of 50% hydrogen peroxide and 20mL/L of absolute ethyl alcohol.
In one embodiment, the passivation treatment is to immerse a stainless steel workpiece into the chromium-free passivator provided by the invention, soak the stainless steel workpiece at 55-65 ℃ for 15-30 min, wash the stainless steel workpiece with water, and then perform sealing treatment.
In one embodiment, the sealing treatment is to immerse the stainless steel workpiece in the sealing agent, soak the stainless steel workpiece at 55-60 ℃ for 25-35 s, wash the stainless steel workpiece with water and then dry the stainless steel workpiece.
The sealant comprises the following components: oleic acid 2-5 g/L, diethanolamine 2-5 g/L, and monoethanolamine 2-5 g/L.
In one embodiment, the drying treatment is drying the stainless steel workpiece at 100 ± 5 ℃ for 10-25 min.
Compared with the prior art, the invention has the following advantages and technical effects:
(1) The chromium-free passivator comprises the following components of 45% fluotitanic acid 3-8 g/L,68% nitric acid 300-350 g/L, sodium metavanadate 10-20 g/L,50% nickel nitrate 10-20 g/L, modified nano titanium dioxide 2-5 g/L, and the balance of water; the chromium-free passivator can form a chromium-free passivation film on the surface of stainless steel, can obviously improve the corrosion resistance of the surface of the stainless steel, and has the characteristics of environmental protection, no toxicity, easy operation, no influence on the appearance shape of the surface of the stainless steel, high adhesion of the passivation film and the like.
(2) The invention adopts a chemical deposition method to deposit a chromium-free passivation film on the surface of stainless steel, and modified nano TiO is further introduced on the basis of a Ti-V-Ni ternary alloy passivation film 2 To form Ti-V-Ni-nano TiO 2 Multicomponent composite passive film using nano TiO 2 The photoelectric conversion characteristic of the nano TiO material under the illumination condition 2 Can be used as a non-sacrificial anode to provide cathodic protection for a stainless steel substrate, and can further improve the corrosion resistance of the chromium-free passivation film.
(3) The modified nano TiO added in the invention 2 Adding nano TiO 2 After the poly-dopamine is modified, firstly, the nano TiO can be improved 2 The dispersibility of the stainless steel chromium-free passivator and the good biological viscosity of polydopamine can further improve the Ti-V-Ni-nano TiO 2 The adhesion of the multi-element composite passive film on stainless steel.
(4) The stainless steel surface treatment method provided by the invention has the characteristics of simple process, short passivation treatment time, suitability for industrial production and the like.
Drawings
FIG. 1 is a process flow diagram of example 1 of the present invention.
FIG. 2 is a surface condition diagram of a stainless steel workpiece subjected to a salt spray test in example 1 of the present invention;
FIG. 3 is a surface condition chart of a stainless steel workpiece subjected to a salt spray test in example 2 of the present invention;
FIG. 4 is a surface condition chart of a stainless steel workpiece subjected to a salt spray test in example 3 of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to specific examples and drawings, but the embodiments of the present invention are not limited thereto. All the raw materials and reagents used in the present invention are commercially available raw materials and reagents, unless otherwise specified.
Modified nano-meterTiO 2 The preparation of (1):
adding 0.1-0.5 g of nano titanium dioxide into 100mL of Tris-HCL buffer solution (pH = 8.5), ultrasonically dispersing for 30-45 min at 500-800W, continuously adding 0.1-0.5 g of dopamine hydrochloride, stirring and reacting for 6-8 h at 40-50 ℃, centrifugally separating, washing solid products with water and ethanol for three times respectively, and then drying in vacuum at 35-40 ℃ for 12-24 h to obtain the polydopamine modified nano titanium dioxide.
Example 1:
degreasing treatment: soaking a 304 stainless steel workpiece in a degreasing agent (10 g/L of sodium hydroxide, 20g/L of sodium carbonate, 5g/L of trisodium phosphate, 1.25g/L of sodium metasilicate pentahydrate, 1g/L of OP-10 emulsifier, 2g/L of sodium dodecyl benzene sulfonate and the balance of water), soaking for 6min at the temperature of 60 ℃, washing and then performing activation treatment;
activation treatment: immersing a stainless steel workpiece into an activating agent (50% sulfuric acid 50-100 g/L,50% hydrogen peroxide 25-50 g/L, absolute ethyl alcohol 20mL/L and the balance of water), soaking at 30-50 ℃ for 30-60 s, washing with water, and then performing passivation treatment;
passivating: immersing a 304 stainless steel workpiece into a chromium-free passivator (3 g/L45% fluotitanic acid, 300 g/L68% nitric acid, 20g/L sodium metavanadate, 10 g/L50% nickel nitrate, 3g/L modified nano titanium dioxide and the balance of water), soaking at 55-65 ℃ for 15-30 min, washing with water, and then carrying out sealing treatment;
sealing treatment: immersing a 304 stainless steel workpiece into a sealing agent (2-5 g/L of oleic acid, 2-5 g/L of diethanol amine, 2-5 g/L of monoethanolamine, and the balance of water), soaking at 55-60 ℃ for 25-35 s, washing with water, and then performing drying treatment;
drying treatment: drying the 304 stainless steel workpiece at 100 +/-5 ℃ for 10-25 min.
Fig. 1 is a process flow chart of the present embodiment.
Example 2:
example 2 is different from example 1 in that the stainless steel workpiece to be treated is a 316 stainless steel workpiece, wherein the chromium-free passivating agent used in the passivation treatment comprises 5 g/L45% fluotitanic acid, 350 g/L68% nitric acid, 10g/L sodium metavanadate, 20 g/L50% nickel nitrate, 5g/L modified nano titanium dioxide and the balance of water.
Example 3:
example 3 is different from example 1 in that the stainless steel workpiece to be treated is 430 stainless steel workpiece, wherein the chromium-free passivating agent used in the passivating treatment comprises the components of 45% fluorotitanic acid 8g/L,68% nitric acid 300g/L, sodium metavanadate 15g/L,50% nickel nitrate 15g/L, modified nano titanium dioxide 2g/L, and the balance of water.
Comparative example 1:
the difference between the comparative example 1 and the example 1 is that the components of the chromium-free passivator are as follows: 3g/L of 45% fluotitanic acid, 300g/L of 68% nitric acid, 20g/L of sodium metavanadate, 10g/L of 50% nickel nitrate and the balance of water.
Comparative example 2:
the difference between the comparative example 2 and the example 1 is that the components of the chromium-free passivating agent are as follows: 3g/L of 45% fluotitanic acid, 300g/L of 68% nitric acid, 20g/L of sodium metavanadate, 10g/L of 50% nickel nitrate, 3g/L of nano titanium dioxide and the balance of water.
Comparative example 3:
the difference between the comparative example 3 and the example 1 is that the components of the chromium-free passivator are as follows: 300g/L of 68% nitric acid, 20g/L of sodium metavanadate, 10g/L of 50% nickel nitrate, 3g/L of modified nano titanium dioxide and the balance of water.
Comparative example 4:
the comparative example 4 is different from the example 1 in that the components of the chromium-free passivator are as follows: 3g/L of 45 percent fluotitanic acid, 300g/L of 68 percent nitric acid, 20g/L of sodium metavanadate, 10g/L of 50 percent nickel nitrate, 15g/L of modified nano titanium dioxide and the balance of water
The stainless steel workpieces treated in the examples 1-3 and the comparative examples 1-3 are respectively subjected to 72h, 96h and 120h salt spray tests, and the results are shown in the table 1.
The salt spray test adopts 5% sodium chloride neutral salt spray continuous spraying, and the salt spray test results are classified as follows:
stage 10: the surface of the stainless steel workpiece has no defect area and no change in appearance; and 9, stage: the defect area ratio is not more than 0.1%, and the surface of the stainless steel workpiece has slight to moderate discoloration; and 8 stage: the defect area ratio is 0.1-0.25%, the surface of the stainless steel workpiece is seriously discolored or has very slight corrosive substances; the salt spray test is not passed under the 8 th grade.
TABLE 1 Effect of the treatment methods on the Corrosion resistance of stainless Steel workpieces
| Contrast item | Appearance after surface treatment | 72h salt spray | Salt spray for 96h | 120h salt spray |
| Example 1 | Uniform, dustless hand wiping, metallic luster | Grade 10 | Grade 10 | Grade 10 |
| Example 2 | Uniform, dustless hand wiping, metallic luster | Grade 10 | Grade 10 | Grade 10 |
| Example 3 | Even, dustless when hand-rubbed, has metallic luster | Grade 10 | Grade 10 | Grade 10 |
| Comparative example 1 | Uniform, dustless hand wiping, metallic luster | Grade 10 | Grade 9 | Do not pass through |
| Comparative example 2 | Uneven, white patches on the surface of the workpiece | Stage 8 | Do not pass through | Do not pass through |
| Comparative example 3 | Uniform, dustless hand wiping, metallic luster | Grade 9 | Do not pass through | Do not pass through |
| Comparative example 4 | Uniform and the metallic luster disappears | Grade 10 | Grade 10 | Grade 10 |
As can be seen from the salt spray test results in Table 1, the stainless steel chromium-free passivator and the stainless steel surface treatment method provided by the invention can obviously improve the corrosion resistance of stainless steel, and the surface of a stainless steel workpiece has no appearance change after 120h of salt spray test; it can be seen from comparative example 1 that the modified nano TiO is absent in the chromium-free passivator 2 When the components are used, the corrosion resistance of the stainless steel is reduced, and the stainless steel fails a 120h salt spray test; it is seen from comparative example 2 that when nano titanium dioxide is used as a modified one, the agglomeration phenomenon is severeThe uniform and complete passive film is difficult to form on the surface of the stainless steel, and at the moment, the addition of the nano titanium dioxide reduces the protective effect of the chromium-free passivator on the stainless steel, so that the stainless steel does not pass a 96-hour salt spray test; the comparative example 3 shows that when the fluotitanic acid component is lacked in the chromium-free passivator, the Ti-V-Ni ternary alloy is changed into the V-Ni binary alloy, the corrosion resistance of the stainless steel is obviously reduced, and finally the stainless steel fails the 96h salt spray test; as can be seen from comparative example 4, when the modified nano titanium dioxide is added in an amount exceeding the limit of the present invention, the final appearance of the stainless steel is affected to lose the metallic luster.
The above embodiments are the best mode for carrying out the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be regarded as equivalent substitutions and are included in the scope of the present invention.
Claims (9)
1. The stainless steel chromium-free passivator is characterized by comprising the following components: 3 to 8g/L of 45 percent fluotitanic acid, 300 to 350g/L of 68 percent nitric acid, 10 to 20g/L of sodium metavanadate, 10 to 20g/L of 50 percent nickel nitrate, 2 to 5g/L of modified nano titanium dioxide and the balance of water;
the modified nano titanium dioxide is obtained by modifying nano titanium dioxide through polydopamine;
the dopamine modification of the nano titanium dioxide comprises the following steps: adding nano titanium dioxide into a Tris-HCL buffer solution (pH = 8.5), carrying out ultrasonic dispersion, continuously adding dopamine hydrochloride, carrying out stirring reaction for 6 to 8hours at the temperature of 40 to 50 ℃, separating, washing a solid product, and drying to obtain the poly-dopamine modified nano titanium dioxide.
2. The stainless steel chromium-free passivator according to claim 1, comprising the following components: 3g/L of 45% fluotitanic acid, 300g/L of 68% nitric acid, 20g/L of sodium metavanadate, 10g/L of 50% nickel nitrate, 3g/L of modified nano titanium dioxide and the balance of water.
3. The stainless steel chromium-free passivating agent according to claim 1, which comprises the following components: 5g/L of 45% fluotitanic acid, 350g/L of 68% nitric acid, 10g/L of sodium metavanadate, 20g/L of 50% nickel nitrate, 5g/L of modified nano titanium dioxide and the balance of water.
4. A stainless steel surface treatment method characterized by using the chromium-free passivating agent for stainless steel according to any one of claims 1 to 3.
5. The stainless steel surface treatment method according to claim 4, comprising the steps of: sequentially carrying out degreasing treatment, activation treatment, passivation treatment, sealing treatment and drying treatment on stainless steel;
and the passivation treatment is to immerse a stainless steel workpiece into the stainless steel chromium-free passivating agent, soak the stainless steel workpiece at the temperature of 55 to 65 ℃ for 15 to 30min, wash the stainless steel workpiece with water and then seal the stainless steel workpiece.
6. The stainless steel surface treatment method according to claim 5, characterized in that: the degreasing treatment is to immerse the stainless steel workpiece in a degreasing agent, soak the stainless steel workpiece for 6min at the temperature of 60 ℃, and carry out activation treatment after washing;
the degreasing agent comprises the following components: 10g/L of sodium hydroxide, 20g/L of sodium carbonate, 5g/L of trisodium phosphate, 1.25g/L of sodium metasilicate pentahydrate, 1g/L of OP-10 emulsifier and 2g/L of sodium dodecyl benzene sulfonate.
7. The stainless steel surface treatment method according to claim 5, characterized in that: the activation treatment is to immerse the stainless steel workpiece in an activating agent, soak the stainless steel workpiece at the temperature of 30 to 50 ℃ for 30 to 60s, wash the stainless steel workpiece with water and then passivate the stainless steel workpiece;
the activator comprises the following components: 50 to 100g/L of 50% sulfuric acid, 25 to 50g/L of 50% hydrogen peroxide and 20mL/L of absolute ethyl alcohol.
8. The stainless steel surface treatment method according to claim 5, characterized in that: and the sealing treatment is to immerse the stainless steel workpiece into a sealing agent, soak the stainless steel workpiece at the temperature of 55 to 60 ℃ for 25 to 35s, wash the stainless steel workpiece with water and then dry the stainless steel workpiece.
The sealant comprises the following components: oleic acid is 2-5g/L, diethanolamine is 2-5g/L, and monoethanolamine is 2-5g/L.
9. The stainless steel surface treatment method according to claim 5, characterized in that: the drying treatment is to dry the stainless steel workpiece at 100 +/-5 ℃ for 10 to 25min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110499058.5A CN113430507B (en) | 2021-05-08 | 2021-05-08 | Stainless steel chromium-free passivator and surface treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110499058.5A CN113430507B (en) | 2021-05-08 | 2021-05-08 | Stainless steel chromium-free passivator and surface treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113430507A CN113430507A (en) | 2021-09-24 |
| CN113430507B true CN113430507B (en) | 2022-11-22 |
Family
ID=77753086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110499058.5A Active CN113430507B (en) | 2021-05-08 | 2021-05-08 | Stainless steel chromium-free passivator and surface treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113430507B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7294211B2 (en) * | 2002-01-04 | 2007-11-13 | University Of Dayton | Non-toxic corrosion-protection conversion coats based on cobalt |
| CN107236946B (en) * | 2017-08-13 | 2020-04-07 | 上海釜强智能科技有限公司 | Colorful chromium-free passivation solution |
| CN108998785B (en) * | 2018-07-19 | 2022-02-08 | 广东顺德中海源富环保科技有限公司 | Chromium-free stainless steel passivator and passivation method using same |
| CN111575692A (en) * | 2020-05-25 | 2020-08-25 | 山东大学 | Plant-extracted chelating agent, metal surface environment-friendly pretreatment agent based on plant-extracted chelating agent and application of metal surface environment-friendly pretreatment agent |
-
2021
- 2021-05-08 CN CN202110499058.5A patent/CN113430507B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113430507A (en) | 2021-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104498925B (en) | A kind of metal surface treating liquid and application based on polyfunctional group alkyl phosphate | |
| CN104962899A (en) | Phosphorus-free graphene-oxide-containing metal surface pretreatment solution and application method thereof | |
| CN101935832A (en) | Zinc-iron metal alramenting liquid capable of being recycled at normal temperature | |
| CN107740085B (en) | A kind of composite coloured passivating solution of environment-friendly type and preparation method thereof | |
| CN109402620A (en) | Aluminum alloy surface Chrome-free is anti-corrosion chemical composition coating film forming solution and film layer preparation method | |
| CN102899652B (en) | Preparation method and application of water-based antirust agent used before coating | |
| CN101333674B (en) | Pretreatment process for electrophoresis coating | |
| EP0175606A1 (en) | Process for the chemical-conversion treatment of zinc or its alloys, concentrate and bath for performing this process | |
| CN104404489B (en) | The Zinc phosphating solution of aluminium alloy | |
| CN113430507B (en) | Stainless steel chromium-free passivator and surface treatment method | |
| CN108611629A (en) | A kind of anti-corrosion treatment process on copper product surface | |
| CN111534815A (en) | Pretreatment liquid capable of forming washable natural color conversion film on metal surface and preparation method thereof | |
| CN112064006B (en) | Passivation method of copper part | |
| CN112048716B (en) | Concentrated silane coating agent and preparation method thereof | |
| CN112522692B (en) | Water-soluble metal surface sealing protection liquid, preparation method and application | |
| US9782804B1 (en) | Method for passivating substrate surfaces | |
| CN110257838B (en) | Aluminum profile powder spraying pretreatment process | |
| CN111549352A (en) | Dust remover and surface treatment method of zinc alloy die casting | |
| CN108554755B (en) | A kind of automobile parts surface intensified technique | |
| CH615462A5 (en) | Process for obtaining a black coating on an aluminium or aluminium alloy surface | |
| CN106048576A (en) | Washing-free chromium-free passivating agent preparation method | |
| US9039821B2 (en) | Methods and compositions for coating aluminum substrates | |
| CN110629233A (en) | Surface treatment process before automobile hub powder spraying | |
| CN109267050A (en) | Substrate surface process technique | |
| CN115261839A (en) | Passivation solution for passivation treatment of high-corrosion-resistance alloy |
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 | ||
| CB02 | Change of applicant information |
Address after: 516199 south of Guangshan highway, niutianling village group, Xinjie village committee, Luoyang Town, BOLUO County, Huizhou City, Guangdong Province Applicant after: Guangdong Dongming New Material Technology Co.,Ltd. Address before: 516199 south of Guangshan highway, niutianling village group, Xinjie village committee, Luoyang Town, BOLUO County, Huizhou City, Guangdong Province Applicant before: BO LUO XIAN DOMIN CHEMICAL CO.,LTD. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |