CN110983319A - Novel energy-saving environment-friendly phosphating substitution process - Google Patents
Novel energy-saving environment-friendly phosphating substitution process Download PDFInfo
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- CN110983319A CN110983319A CN201911392652.3A CN201911392652A CN110983319A CN 110983319 A CN110983319 A CN 110983319A CN 201911392652 A CN201911392652 A CN 201911392652A CN 110983319 A CN110983319 A CN 110983319A
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- Prior art keywords
- phosphating
- novel energy
- phytic acid
- friendly
- water
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Classifications
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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
- 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
-
- 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
- C23C22/73—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 characterised by the process
-
- 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
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- 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 discloses a novel energy-saving and environment-friendly phosphating substitution process which is used for substituting the traditional phosphating process. The process obtains phytate through decomposition of phytic acid, and the phytate is combined with metal ions to form a phosphating film. The performance indexes of the obtained protective film in corrosion resistance, adhesive force with a paint film and the like are higher than those of the traditional phosphating process, and the treatment process does not contain heavy metal ion wastewater containing phosphorus, manganese, chromium and the like, so that the protective film is green and environment-friendly; the process does not need heating, can be used for production at room temperature, can effectively improve the efficiency, reduces the production cost, and saves the comprehensive cost by 57 percent.
Description
Technical Field
The invention belongs to the technical field of corrosion prevention, and provides a novel solution which is combined with metal ions to form a complex compound to be attached to the surface of metal to form a protective film by using the principle that phytic acid is ionized into phytate.
Background
The traditional phosphating process has poor corrosion resistance and contains a large amount of heavy metal ions such as phosphate, zinc, manganese, nickel and the like, and waste water containing a large amount of metal ions is generated in the post-treatment process, so that the environment is greatly damaged, and the requirement of environmental protection cannot be met. In addition, the traditional phosphating using process needs heating production, so that the equipment investment and maintenance cost is high, and the energy consumption is high.
Disclosure of Invention
The invention aims to provide a novel energy-saving and environment-friendly phosphating substitution process, which adopts solution containing phytic acid to substitute phosphating solution used for phosphating treatment.
The main technical characteristic of the invention is that different acid salts are obtained by ionizing phytic acid in SW-3 solution in water with different pH values, and complete phytate is generated.
The equation is as follows:
RH12+H2O→RH- 11+H3O+
RH11+H2O→RH2- 10+H3O+
wherein R ═ C6H6O6(PO3)6
When the metal contacts with the phytic acid solution, the metal is easy to lose electrons and has positive charges, RH-11, RH 2-10 and the like with negative charges in the solution are easy to combine with the metal, and meanwhile, the O atom contained in the phytic acid can be used as a coordination atom to be complexed with the phytic acid. Therefore, phytic acid is very easy to combine with positively charged metal cations to form a complex, and the complex has looseness. Under the condition, after the SiO2.nH2O (nano silica sol) in the solution is hydrolyzed, a complex compound generated with the phytic acid is attached to the surface of the metal in a form of precipitation, a compact protective film is finally formed, and H + is converted into H2 to be released, wherein the chemical conversion process is similar to steel phosphorization and comprises the dissolution reaction of a matrix and the crystallization precipitation of insoluble phytate.
The invention provides a novel energy-saving environment-friendly phosphating substitution process which is characterized by comprising the following steps: the solution containing phytic acid is used to replace the phosphating solution used in the phosphating treatment.
Further, the method comprises the following steps:
pretreating the surface of a metal workpiece to be treated;
immersing the pretreated metal workpiece into a solution containing phytic acid;
and 3, taking the metal workpiece out, washing with water and drying.
Further, in the step 1), the step of preprocessing comprises: degreasing the surface of the metal workpiece, washing with water, pickling, and washing with water again.
Further, in the step 2), the components and weight ratio of the solution containing phytic acid are as follows:
phytic acid: 5 g/L-8 g/L
Nano silica sol: 7 g/L-7.5 g/L
Water: the balance of water
Further, in the step 2), when the metal workpiece is immersed into the solution, the pH value of the solution is adjusted to 3.5-4.2.
The invention has the beneficial effects that: the performance indexes of corrosion resistance, adhesive force with a paint film and the like of the protective film obtained by the novel alternative process are higher than those of the traditional phosphating process, and the treatment process does not contain heavy metal ion wastewater containing phosphorus, manganese, chromium and the like, so that the novel phosphating process is green and environment-friendly; the process does not need heating, is used for production at room temperature, has short treatment time (the phosphating treatment is about 10min generally, and the treatment time of the invention is 0.5-2 min), can effectively improve the efficiency, reduces the production cost, saves the energy cost by 51 percent, and saves the comprehensive cost by 57 percent.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
a novel energy-saving environment-friendly phosphating substitution process is characterized by comprising the following steps:
pretreating the surface of a part workpiece made of Q235 material to be treated;
the pretreatment process is pre-degreasing → main degreasing → water washing → acid washing → water washing.
Preparing a solution containing phytic acid according to the following mixture ratio:
phytic acid: 5g/L
Nano silica sol: 7g/L
Water: the balance of water
Immersing the pretreated metal workpiece into the phytic acid-containing solution for 2min at normal temperature;
and 3, taking out the metal workpiece, washing with water and drying to finish the treatment step which is equal to the traditional phosphating process, and enabling the workpiece to enter the next working procedure.
Example 2:
a novel energy-saving environment-friendly phosphating substitution process is characterized by comprising the following steps:
pretreating the surface of a 45 steel part workpiece to be treated;
the pretreatment process is pre-degreasing → main degreasing → water washing → acid washing → water washing.
Preparing a solution containing phytic acid according to the following mixture ratio:
phytic acid: 8g/L
Nano silica sol: 7.5g/L
Water: the balance of water
Immersing the pretreated metal workpiece into the phytic acid-containing solution for 2min at normal temperature;
and 3, taking out the metal workpiece, washing with water and drying to finish the treatment step which is equal to the traditional phosphating process, and enabling the workpiece to enter the next working procedure.
Claims (5)
1. A novel energy-saving environment-friendly phosphating substitution process is characterized by comprising the following steps: the solution containing the phytic acid is adopted to replace phosphating solution used in phosphating treatment.
2. A novel energy-saving environment-friendly phosphating substitution process is characterized by comprising the following steps:
pretreating the surface of a metal workpiece to be treated;
immersing the pretreated metal workpiece into a solution containing phytic acid;
and 3, taking the metal workpiece out, washing with water and drying.
3. The novel energy-saving environment-friendly phosphating substitution process according to claim 2, which is characterized in that:
in the step 1, the step of preprocessing comprises: degreasing the surface of the metal workpiece, washing with water, pickling, and washing with water again.
4. The novel energy-saving environment-friendly phosphating substitution process according to claim 1 or 2, characterized in that:
in the step 2) of claim 1 and claim 2, the components and weight ratio of the phytic acid-containing solution are as follows:
phytic acid: 5 g/L-8 g/L
Nano silica sol: 7 g/L-7.5 g/L
Water: the balance of water
5. The novel energy-saving environment-friendly phosphating substitution process according to claim 2 or 4, characterized in that: in the step 2, when the metal workpiece is immersed into the solution, the pH value of the solution is adjusted to 3.5-4.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911392652.3A CN110983319A (en) | 2019-12-30 | 2019-12-30 | Novel energy-saving environment-friendly phosphating substitution process |
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| CN201911392652.3A CN110983319A (en) | 2019-12-30 | 2019-12-30 | Novel energy-saving environment-friendly phosphating substitution process |
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| CN110983319A true CN110983319A (en) | 2020-04-10 |
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| CN201911392652.3A Pending CN110983319A (en) | 2019-12-30 | 2019-12-30 | Novel energy-saving environment-friendly phosphating substitution process |
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Citations (6)
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|---|---|---|---|---|
| CN1171455A (en) * | 1997-06-12 | 1998-01-28 | 高明市金得利科技发展有限公司 | Antirusting agent for metallic surface and its application method |
| CN1326011A (en) * | 2000-05-29 | 2001-12-12 | 赵家文 | Chemical agent for generating transition phytase film of metal |
| CN101469421A (en) * | 2007-12-29 | 2009-07-01 | 比亚迪股份有限公司 | Film forming solution for magnesium alloy chemical composition coating and preparation thereof |
| CN103668155A (en) * | 2013-12-06 | 2014-03-26 | 长沙艾森设备维护技术有限公司 | Passivating solution and method for passivating ferrous metal surface by employing same |
| CN103834940A (en) * | 2014-02-17 | 2014-06-04 | 芜湖市瑞杰环保材料科技有限公司 | Environment-friendly fluorine-free metal surface treatment agent and metal surface treatment method |
| CN106756967A (en) * | 2016-12-02 | 2017-05-31 | 兰州理工大学 | A kind of chrome-free tanning agent and the method being passivated to aluminum or aluminum alloy surface |
-
2019
- 2019-12-30 CN CN201911392652.3A patent/CN110983319A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1171455A (en) * | 1997-06-12 | 1998-01-28 | 高明市金得利科技发展有限公司 | Antirusting agent for metallic surface and its application method |
| CN1326011A (en) * | 2000-05-29 | 2001-12-12 | 赵家文 | Chemical agent for generating transition phytase film of metal |
| CN101469421A (en) * | 2007-12-29 | 2009-07-01 | 比亚迪股份有限公司 | Film forming solution for magnesium alloy chemical composition coating and preparation thereof |
| CN103668155A (en) * | 2013-12-06 | 2014-03-26 | 长沙艾森设备维护技术有限公司 | Passivating solution and method for passivating ferrous metal surface by employing same |
| CN103834940A (en) * | 2014-02-17 | 2014-06-04 | 芜湖市瑞杰环保材料科技有限公司 | Environment-friendly fluorine-free metal surface treatment agent and metal surface treatment method |
| CN106756967A (en) * | 2016-12-02 | 2017-05-31 | 兰州理工大学 | A kind of chrome-free tanning agent and the method being passivated to aluminum or aluminum alloy surface |
Non-Patent Citations (2)
| Title |
|---|
| 刘会云: "镁合金植酸转化膜结构与耐腐蚀性能研究", 《中国优秀硕士学位论文全文数据库（工程科技Ⅰ辑）》 * |
| 康佳等: "镀锌板无铬钝化技术研究进展", 《应用化工》 * |
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