CN112442685A - Preparation method of co-deposited composite iron-chromium oxide coating - Google Patents
Preparation method of co-deposited composite iron-chromium oxide coating Download PDFInfo
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- CN112442685A CN112442685A CN202011318215.XA CN202011318215A CN112442685A CN 112442685 A CN112442685 A CN 112442685A CN 202011318215 A CN202011318215 A CN 202011318215A CN 112442685 A CN112442685 A CN 112442685A
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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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
- C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
- C23C18/1204—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
- C23C18/1208—Oxides, e.g. ceramics
- C23C18/1216—Metal oxides
Abstract
The invention discloses a preparation method of a codeposition composite iron-chromium oxide coating, which comprises the following steps: 1) cleaning the surface of a device to be deposited, taking urea, iron-chromium alloy and water, and uniformly mixing the urea, the iron-chromium alloy and the water to obtain a deposition solution, wherein the mass percentage of the urea, the iron-chromium alloy and the water is 10-60: 2-20: 38-80; 2) soaking the device to be deposited into the deposition solution obtained in the step 1), then sealing, heating and preserving heat to finish the preparation of the co-deposited composite iron-chromium oxide coating on the surface of the device to be deposited. The method can finish the preparation of the iron-chromium oxide coating with high quality in the oxidation process, and can be suitable for devices with complex structures.
Description
Technical Field
The invention belongs to the technical field of surface coatings, and relates to a preparation method of a co-deposited composite iron-chromium oxide coating.
Background
The formation of protective oxide films by selective high-temperature oxidation of alloys is an important principle in the design of high-temperature alloys and coatings thereof. Increasing the content of the selectively oxidized element in the alloy or increasing the diffusion speed of the selectively oxidized element in the alloy, reducing the content of oxygen in the alloy and the diffusion speed of the oxygen, and increasing the nucleation rate of the oxide can promote the selective oxidation of the alloy. The selective oxidation film with the best oxidation resistance has Al2O3、SiO2And Cr2O3And (3) a membrane. However, titanium alloys, stainless steels and nickel-based alloys with low Cr, Al and Si contents, cannot form protective Al during oxidation2O3、SiO2And Cr2O3The film can only improve the high-temperature oxidation resistance of the metal material through surface modification. The surface modification mainly comprises a metal coating, a ceramic coating, surface microcrystallization and the like.
Besides the oxide film formed on the surface of the alloy can isolate the environment from the alloy matrix and play a role in resisting oxidation/corrosion, some oxide coatings also play other roles. For example, a titanium anode is an anode in a titanium-based metal oxide coating. The catalytic coating has oxygen evolution function, chlorine evolution function and the like according to different surface catalytic coatings; the thermal barrier coating plays a role in heat insulation by utilizing the low thermal conductivity of the thermal barrier coating;
at present, the preparation methods of metal oxide coatings are more, such as thermal spraying technology, composite electroplating technology, sintering technology and the like, but the quality of the coatings prepared by the technologies is poor, and the oxide coatings deposited on devices with complex structures are especially prominent.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of a codeposition composite iron-chromium oxide coating, which can finish the preparation of the iron-chromium oxide coating with high quality in the oxidation process and can be suitable for devices with complex structures.
In order to achieve the aim, the preparation method of the co-deposition composite iron-chromium oxide coating comprises the following steps:
1) cleaning the surface of a device to be deposited, taking urea, iron-chromium alloy and water, and uniformly mixing the urea, the iron-chromium alloy and the water to obtain a deposition solution, wherein the mass percentage of the urea, the iron-chromium alloy and the water is 10-60: 2-20: 38-80;
2) soaking the device to be deposited into the deposition solution obtained in the step 1), then sealing, heating and preserving heat to finish the preparation of the co-deposited composite iron-chromium oxide coating on the surface of the device to be deposited.
The specific operations of sealing, heating and heat preservation in the step 2) are as follows: heating to 120-150 ℃ under a sealed condition, and preserving heat for 10-100 h.
The specific operation of cleaning the surface of the device to be deposited in the step 1) is as follows: and sequentially removing oil and rust on the surface of the device to be deposited.
The co-deposition composite iron-chromium oxide coating consists of iron oxide and chromium oxide, wherein the volume fraction of the chromium oxide in the co-deposition composite iron-chromium oxide coating is more than or equal to 50%.
The thickness of the co-deposition composite iron-chromium oxide coating is 10-200 mu m.
The invention has the following beneficial effects:
the preparation method of the co-deposition composite iron-chromium oxide coating is characterized in that urea, iron-chromium alloy and water are used as raw materials to prepare a deposition solution, a device to be deposited is directly soaked in the deposition solution, and the co-deposition composite iron-chromium oxide coating on the surface of the device to be deposited can be prepared by heating and insulating. In addition, during the preparation process, the generation of the iron-chromium oxide and the deposition of the iron-chromium oxide on the surface of a device to be deposited are simultaneously completed in the heating and heat preservation process. In addition, the invention is suitable for various devices with complex structures, and compared with the prior art, the invention has the advantages of simple preparation flow, low preparation cost, stronger adaptability and higher coating quality.
Drawings
FIG. 1 is a scanning electron microscope micrograph of a cross section of a co-deposited composite iron chromium oxide coating prepared on the surface of a titanium alloy TA11 in example seven of the present invention;
FIG. 2 is a scanning electron micrograph of a surface of a co-deposited composite iron chromium oxide coating prepared on the surface of titanium alloy TA11 in example seven of the present invention;
FIG. 3 is a scanning electron microscope micrograph of a cross section of a co-deposited composite iron chromium oxide coating prepared on the surface of titanium alloy TC4 in example seven of the present invention;
fig. 4 is a scanning electron microscope micrograph of a cross section of a co-deposited composite iron-chromium oxide coating prepared on the surface of a nickel-based alloy Inconel 718 alloy in the seventh embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
example one
The preparation method of the codeposition composite iron-chromium oxide coating comprises the following steps:
1) cleaning the surface of a device to be deposited, taking urea, iron-chromium alloy and water, and uniformly mixing the urea, the iron-chromium alloy and the water to obtain a deposition solution, wherein the mass percentage of the urea, the iron-chromium alloy and the water is 10: 20: 70;
2) soaking the device to be deposited into the deposition solution obtained in the step 1), then sealing, heating and preserving heat to finish the preparation of the co-deposited composite iron-chromium oxide coating on the surface of the device to be deposited.
The specific operations of sealing, heating and heat preservation in the step 2) are as follows: heating to 145 ℃ under sealed condition, and keeping the temperature for 90 h.
The specific operation of cleaning the surface of the device to be deposited in the step 1) is as follows: and sequentially carrying out oil removal and rust removal on the surface of the device to be deposited.
Example two
The preparation method of the codeposition composite iron-chromium oxide coating comprises the following steps:
1) cleaning the surface of a device to be deposited, taking urea, iron-chromium alloy and water, and uniformly mixing the urea, the iron-chromium alloy and the water to obtain a deposition solution, wherein the mass percentage of the urea, the iron-chromium alloy and the water is 60: 2: 38;
2) soaking the device to be deposited into the deposition solution obtained in the step 1), then sealing, heating and preserving heat to finish the preparation of the co-deposited composite iron-chromium oxide coating on the surface of the device to be deposited.
The specific operations of sealing, heating and heat preservation in the step 2) are as follows: heating to 140 ℃ under sealed condition, and keeping the temperature for 80 h.
The specific operation of cleaning the surface of the device to be deposited in the step 1) is as follows: and sequentially removing oil and rust on the surface of the device to be deposited.
EXAMPLE III
The preparation method of the codeposition composite iron-chromium oxide coating comprises the following steps:
1) cleaning the surface of a device to be deposited, taking urea, iron-chromium alloy and water, and uniformly mixing the urea, the iron-chromium alloy and the water to obtain a deposition solution, wherein the mass percentage of the urea, the iron-chromium alloy and the water is 10: 10: 80;
2) soaking the device to be deposited into the deposition solution obtained in the step 1), then sealing, heating and preserving heat to finish the preparation of the co-deposited composite iron-chromium oxide coating on the surface of the device to be deposited.
The specific operations of sealing, heating and heat preservation in the step 2) are as follows: heating to 140 ℃ under sealed condition, and keeping the temperature for 60 h.
The specific operation of cleaning the surface of the device to be deposited in the step 1) is as follows: and sequentially removing oil and rust on the surface of the device to be deposited.
Example four
The preparation method of the codeposition composite iron-chromium oxide coating comprises the following steps:
1) cleaning the surface of a device to be deposited, taking urea, iron-chromium alloy and water, and uniformly mixing the urea, the iron-chromium alloy and the water to obtain a deposition solution, wherein the mass percentage of the urea, the iron-chromium alloy and the water is 20: 5: 75;
2) soaking the device to be deposited into the deposition solution obtained in the step 1), then sealing, heating and preserving heat to finish the preparation of the co-deposited composite iron-chromium oxide coating on the surface of the device to be deposited.
The specific operations of sealing, heating and heat preservation in the step 2) are as follows: heating to 130 ℃ under sealed conditions, and keeping the temperature for 30 h.
The specific operation of cleaning the surface of the device to be deposited in the step 1) is as follows: and sequentially removing oil and rust on the surface of the device to be deposited.
EXAMPLE five
The preparation method of the codeposition composite iron-chromium oxide coating comprises the following steps:
1) cleaning the surface of a device to be deposited, taking urea, iron-chromium alloy and water, and uniformly mixing the urea, the iron-chromium alloy and the water to obtain a deposition solution, wherein the mass percentage of the urea, the iron-chromium alloy and the water is 40: 15: 45, a first step of;
2) soaking the device to be deposited into the deposition solution obtained in the step 1), then sealing, heating and preserving heat to finish the preparation of the co-deposited composite iron-chromium oxide coating on the surface of the device to be deposited.
The specific operations of sealing, heating and heat preservation in the step 2) are as follows: heating to 150 ℃ under sealed condition, and keeping the temperature for 100 h.
The specific operation of cleaning the surface of the device to be deposited in the step 1) is as follows: and sequentially removing oil and rust on the surface of the device to be deposited.
EXAMPLE six
The preparation method of the codeposition composite iron-chromium oxide coating comprises the following steps:
1) cleaning the surface of a device to be deposited, taking urea, iron-chromium alloy and water, and uniformly mixing the urea, the iron-chromium alloy and the water to obtain a deposition solution, wherein the mass percentage of the urea, the iron-chromium alloy and the water is 30: 12: 58;
2) soaking the device to be deposited into the deposition solution obtained in the step 1), then sealing, heating and preserving heat to finish the preparation of the co-deposited composite iron-chromium oxide coating on the surface of the device to be deposited.
The specific operations of sealing, heating and heat preservation in the step 2) are as follows: heating to 120 ℃ under sealed condition, and keeping the temperature for 10 h.
The specific operation of cleaning the surface of the device to be deposited in the step 1) is as follows: and sequentially removing oil and rust on the surface of the device to be deposited.
EXAMPLE seven
The preparation method of the codeposition composite iron-chromium oxide coating comprises the following steps:
1) cleaning the surface of a device to be deposited, taking urea, iron-chromium alloy and water, and uniformly mixing the urea, the iron-chromium alloy and the water to obtain a deposition solution, wherein the mass percentage of the urea, the iron-chromium alloy and the water is 30: 10: 60, adding a solvent to the mixture;
2) soaking the device to be deposited into the deposition solution obtained in the step 1), then sealing, heating and preserving heat to finish the preparation of the co-deposited composite iron-chromium oxide coating on the surface of the device to be deposited.
The specific operations of sealing, heating and heat preservation in the step 2) are as follows: heating to 130 ℃ under sealed conditions, and keeping the temperature for 20 h.
The specific operation of cleaning the surface of the device to be deposited in the step 1) is as follows: and sequentially removing oil and rust on the surface of the device to be deposited.
Replacing the to-be-deposited device in the seventh embodiment with a titanium alloy TA11, a titanium alloy TC4 and a nickel-based alloy Inconel 718 alloy in sequence, wherein FIG. 1 is a scanning electron microscope micrograph of the cross section of a co-deposited composite iron-chromium oxide coating prepared on the surface of the titanium alloy TA11, FIG. 2 is a scanning electron microscope micrograph of the surface of a co-deposited composite iron-chromium oxide coating prepared on the surface of the titanium alloy TA11, and FIG. 3 is a scanning electron microscope micrograph of the cross section of a co-deposited composite iron-chromium oxide coating prepared on the surface of the titanium alloy TC 4; fig. 4 is a scanning electron microscope micrograph of the cross section of the co-deposited composite iron-chromium oxide coating prepared on the surface of the nickel-based alloy Inconel 718 alloy, and it can be seen from fig. 1, fig. 2, fig. 3 and fig. 4 that the quality of the co-deposited composite iron-chromium oxide coating prepared by the present invention is better, and meanwhile, the thickness of the co-deposited composite iron-chromium oxide coating prepared by the sixth detection example is 80 μm, and the volume fraction of chromium oxide in the coating is about 80%.
The co-deposition composite iron-chromium oxide coating prepared by the invention is detected to be composed of ferric oxide and chromium oxide, wherein the volume fraction of the chromium oxide in the co-deposition composite iron-chromium oxide coating is more than or equal to 50%, and the thickness of the co-deposition composite iron-chromium oxide coating is 10-200 μm.
While the invention has been described in connection with specific embodiments thereof, it will be understood that these should not be construed as limiting the scope of the invention, which is defined in the appended claims, any modifications to which this invention pertains being applicable being within the scope of this invention.
Claims (8)
1. A preparation method of a codeposited composite iron-chromium oxide coating is characterized by comprising the following steps:
1) cleaning the surface of a device to be deposited, taking urea, iron-chromium alloy and water, and uniformly mixing the urea, the iron-chromium alloy and the water to obtain a deposition solution;
2) soaking the device to be deposited into the deposition solution obtained in the step 1), then sealing, heating and preserving heat to finish the preparation of the co-deposited composite iron-chromium oxide coating on the surface of the device to be deposited.
2. The method for preparing the co-deposited composite iron-chromium oxide coating according to claim 1, wherein the mass percentages of the urea, the iron-chromium alloy and the water are 10-60: 2-20: 38-80.
3. The method for preparing the co-deposited composite iron-chromium oxide coating according to claim 1, wherein the sealing and heating in the step 2) are specifically performed by: heating to 120-150 ℃ under a sealed condition.
4. The method for preparing a co-deposited composite iron chromium oxide coating according to claim 1, wherein the holding time in step 2) is 10-100 h.
5. The preparation method of the co-deposited composite iron chromium oxide coating according to claim 1, characterized in that the specific operation of cleaning the surface of the device to be deposited in step 1) is as follows: and sequentially removing oil and rust on the surface of the device to be deposited.
6. The method of claim 1, wherein the co-deposited composite iron chromium oxide coating is comprised of iron oxide and chromium oxide.
7. The method of claim 1 wherein the volume fraction of chromium oxide in the co-deposited composite iron chromium oxide coating is 50% or greater.
8. The method of claim 1, wherein the thickness of the co-deposited composite iron chromium oxide coating is 10-200 μm.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4097351A (en) * | 1977-02-03 | 1978-06-27 | The Governing Council Of The University Of Toronto | Preparation of metal alloy coatings on iron substrates |
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- 2020-11-23 CN CN202011318215.XA patent/CN112442685A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4097351A (en) * | 1977-02-03 | 1978-06-27 | The Governing Council Of The University Of Toronto | Preparation of metal alloy coatings on iron substrates |
Non-Patent Citations (4)
| Title |
|---|
| 余传隆等: "《中国临床药物大辞典》", 31 August 2018, 中国医药科技出版社 * |
| 泸州天然气化工厂尿素车间: "《尿素生产工艺》", 28 February 1978, 石油化学工业出版社 * |
| 马世昌等: "《基础化学反应》", 31 January 2003, 陕西科学技术出版社 * |
| 魏顺安等: "《化工工艺学》", 31 March 1998, 重庆大学出版社 * |
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