CN103668344B - Surface treatment method for thermal spraying inorganic coating - Google Patents
Surface treatment method for thermal spraying inorganic coating Download PDFInfo
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- CN103668344B CN103668344B CN201310686769.9A CN201310686769A CN103668344B CN 103668344 B CN103668344 B CN 103668344B CN 201310686769 A CN201310686769 A CN 201310686769A CN 103668344 B CN103668344 B CN 103668344B
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- thermal spraying
- inorganic coating
- spraying inorganic
- surface treatment
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Abstract
The invention discloses the surface treatment method for thermal spraying inorganic coating of a kind of anti-solution corrosion performance that can improve thermal spraying inorganic coating.This surface treatment method, is first fixed on the sample coupon with thermal spraying inorganic coating between two inert electrodes；Then said sample part is connected with two inert electrodes respectively, then sample coupon and two inert electrodes are placed in the soluble metal salt solution of conduction and carry out electrolytic deposition process；Sample coupon conduction soluble metal salt solution in through certain time electrolytic deposition process after, it is drawn off and is at room temperature dried process, then sample coupon is heated slowly to 300～400 DEG C in atmosphere, it is incubated 20～40 minutes, then room temperature it is cooled to, realize the envelope of oozing to thermal spraying inorganic coating is overall to process, thus improving the anti-solution corrosion performance of thermal spraying inorganic coating and high temperature oxidation resistance.It is adapted at coating and prepares post processing and recovery technique field promotes the use.
Description
Technical field
The invention belongs to coating and prepare post processing and recovery technique field, be specifically related to a kind of surface treatment method for thermal spraying inorganic coating.
Background technology
Adopting plasma spray technology to prepare the inorganic coatings such as oxide in metal surface is a kind of conventional surfacecti proteon processing method.The functions such as the inorganic coating obtained can utilize it wear-resistant, anticorrosive and heat insulation.When utilizing its anticorrosive function, owing to adopting the coating that plasma spray technology obtains to have bigger porosity, the space being interconnected constitutes the short-channel of corrosive medium, therefore, the coating directly used only shows limited corrosion resistance, the anti-solution corrosion poor-performing of thermal spraying inorganic coating.
Summary of the invention
The technical problem to be solved is to provide the surface treatment method for thermal spraying inorganic coating of a kind of anti-solution corrosion performance that can improve thermal spraying inorganic coating.
The technical solution adopted for the present invention to solve the technical problems is: this is used for the surface treatment method of thermal spraying inorganic coating, comprises the following steps:
A, the sample coupon with thermal spraying inorganic coating is fixed between two inert electrodes；
B, said sample part is connected with two inert electrodes respectively, then sample coupon and two inert electrodes are placed in the soluble metal salt solution of conduction and carry out electrolytic deposition process；
C, sample coupon conduction soluble metal salt solution in through certain time electrolytic deposition process after, it is drawn off and is at room temperature dried process, then sample coupon is heated slowly to 300～400 DEG C in atmosphere, is incubated 20～40min, is then cooled to room temperature.
Further, before carrying out step A, it is carried out the sample coupon with thermal spraying inorganic coating processing.
Further, in step C, the electric current density carrying out using in electrolytic deposition processing procedure is 2A/m2～3A/m2。
Further, in step C, the time carrying out electrolytic deposition process is 2min.
Further, in step C, it is 15min to the sample coupon withering time.
Further, in step C, sample coupon is heated slowly to 350 DEG C in atmosphere.
Further, in step C, in the process that sample coupon is slowly heated in atmosphere, its heating rate is 1 DEG C/min.
Further, in step C, described temperature retention time is 30min.
Further, the soluble metal salt solution of described conduction is the Al (NO of 0.5mol/L3)3Aqueous solution.
Further, the soluble metal salt solution of described conduction is the Zr (NO of 0.5mol/L3)4Alcoholic solution.
The beneficial effects of the present invention is: the gap on thermal spraying inorganic coating surface and perforate and the internal voids that is attached thereto are filled with by the surface treatment method for thermal spraying inorganic coating of the present invention by adopting the method for electrolytic deposition, realize the envelope of oozing to thermal spraying inorganic coating is overall to process, thus improving the anti-solution corrosion performance of thermal spraying inorganic coating, and the gap on thermal spraying inorganic coating surface and perforate and the internal voids that is attached thereto are carried out oxide and fills the high temperature oxidation resistance that can also be greatly improved thermal spraying inorganic coating.
Detailed description of the invention
This is used for the surface treatment method of thermal spraying inorganic coating, comprises the following steps:
A, being fixed on by the sample coupon with thermal spraying inorganic coating between two inert electrodes, the spacing between described sample coupon and two inert electrodes is determined according to practical situation and demand；
B, being connected with two inert electrodes respectively by said sample part, then sample coupon and two inert electrodes are placed in the soluble metal salt solution of conduction and carry out electrolytic deposition process, the deposition voltage/electric current between electrode is determined according to practical situation and demand；
C, sample coupon conduction soluble metal salt solution in through certain time electrolytic deposition process after, in the soluble metal salt solution of conduction, the oxide precursor that contains will deposit in the gap on thermal spraying inorganic coating surface and perforate and the internal voids that is attached thereto, then it is drawn off and is at room temperature dried process, then sample coupon is heated slowly to 300～400 DEG C in atmosphere, the oxide precursor pyrolysis making deposition is corresponding oxide, then insulation 20～40 minutes, then room temperature it is cooled to, complete the envelope of oozing of thermal spraying inorganic coating is processed, envelope effect is oozed in order to improve electrolytic deposition, repeat step A, B, C.
In order to ensure the effect of electrolytic deposition, before carrying out step A, it is carried out the sample coupon with thermal spraying inorganic coating processing, some residues and impurity is washed, it is to avoid impact in electrolyting precipitation process.
In order to make the gap on thermal spraying inorganic coating surface and perforate and the internal voids that is attached thereto all fill full oxide precursor, it is ensured that its filling effect, in step C, the electric current density carrying out using in electrolytic deposition processing procedure is 2A/m2～3A/m2。
In order to improve treatment effeciency while ensureing filling effect, in step C, the time carrying out electrolytic deposition process is preferably 2min.
In order to improve drying efficiency while ensureing drying effect, in step C, the sample coupon withering time is preferably 15min.
It is corresponding oxide to enable oxide precursor all pyrolysis of deposition, and also to save the energy to greatest extent, in step C, sample coupon is heated slowly to 350 DEG C in atmosphere, further, in step C, in the process that sample coupon is slowly heated in atmosphere, its heating rate is 1 DEG C/min.
In order to avoid other chemical reaction occurs the oxide after pyrolysis, it is necessary to keep a period of time at high temperature, in order to other chemical reaction does not occur the oxide after making pyrolysis, in step C, described temperature retention time is preferably 30min.
In order to improve the effect of electrolytic deposition, the soluble metal salt solution of described conduction is preferably the Al (NO for 0.5mol/L3)3Zr (the NO of aqueous solution or 0.5mol/L3)4Alcoholic solution.
Embodiment 1
Zr (the NO of preparation 0.5mol/L3)4Alcoholic solution.By thermal spraying ZrO240 carbon steel sample parts of coating are cleaned and are installed on the depositing device filling above-mentioned solution, install inert electrode, regulate the distance of electrode and sample coupon, switch on power, and arranging electric current density is 2A/m2, deposit 2 minutes, take out sample coupon, in air at room temperature dry 15 minutes, be placed in the heating furnace inside holding 30 minutes of 350 DEG C, be then cooled to room temperature, repeat the above-mentioned electro-deposition of process and dry, heat treatment process 4 times, it is achieved to thermal spraying ZrO2The encapsulation process of coating.
Take the thermal spraying ZrO before and after electrolytic deposition encapsulation process2Sample carries out electro-chemical test in the NaCl aqueous solution of 3.5%.Result shows, the ZrO after electrolytic deposition encapsulation process2Sample, the corrosion potential of its polarization curve is apparently higher than the corrosion potential of untreated samples, it was shown that electrolytic deposition encapsulation process can significantly improve coating corrosion resistance in electrolyte solution.
Embodiment 2
Al (the NO of preparation 0.5mol/L3)3Aqueous solution, by thermal spraying Al2O3The rustless steel sample coupon of coating is cleaned and is installed on the depositing device filling above-mentioned solution, installs inert electrode, regulates the distance of electrode and sample coupon, switches on power, and arranging electric current density is 3A/m2, deposit 2 minutes, take out sample coupon, in air at room temperature dry 15 minutes, be placed in the heating furnace inside holding 30 minutes of 350 DEG C, be then cooled to room temperature, repeat the above-mentioned electro-deposition of process and dry, heat treatment process 2 times, it is achieved to thermal spraying Al2O3The encapsulation process of coating.
Take the thermal spraying Al before and after electrolytic deposition encapsulation process2O3Sample coupon carries out 200 h cycle oxidation tests at 800 DEG C and 900 DEG C.Result shows, the sample after electrolytic deposition encapsulation process, and its increasing weight of oxidation is lower, shows more excellent high temperature oxidation resistance.
Claims (10)
1. for the surface treatment method of thermal spraying inorganic coating, it is characterised in that comprise the following steps:
A, the sample coupon with thermal spraying inorganic coating is fixed between two inert electrodes；
B, said sample part is connected with two inert electrodes respectively, then sample coupon and two inert electrodes are placed in the soluble metal salt solution of conduction and carry out electrolytic deposition process；
C, sample coupon conduction soluble metal salt solution in through certain time electrolytic deposition process after, in the soluble metal salt solution of conduction, the oxide precursor that contains will deposit in the gap on thermal spraying inorganic coating surface and perforate and the internal voids that is attached thereto, then it is drawn off and is at room temperature dried process, then sample coupon is heated slowly to 300～400 DEG C in atmosphere, the oxide precursor pyrolysis making deposition is corresponding oxide, then insulation 20～40 minutes, are then cooled to room temperature.
2. the surface treatment method for thermal spraying inorganic coating as claimed in claim 1, it is characterised in that: before carrying out step A, it is carried out the sample coupon with thermal spraying inorganic coating processing.
3. the surface treatment method for thermal spraying inorganic coating as claimed in claim 1, it is characterised in that: in step C, the electric current density carrying out using in electrolytic deposition processing procedure is 2A/m2～3A/m2。
4. the surface treatment method for thermal spraying inorganic coating as claimed in claim 1, it is characterised in that: in step C, the time carrying out electrolytic deposition process is 2min.
5. the surface treatment method for thermal spraying inorganic coating as claimed in claim 1, it is characterised in that: in step C, it is 15min to the sample coupon withering time.
6. the surface treatment method for thermal spraying inorganic coating as claimed in claim 1, it is characterised in that: in step C, sample coupon is heated slowly to 350 DEG C in atmosphere.
7. the surface treatment method for thermal spraying inorganic coating as claimed in claim 1, it is characterised in that: in step C, in the process that sample coupon is slowly heated in atmosphere, its heating rate is 1 DEG C/min.
8. the surface treatment method for thermal spraying inorganic coating as claimed in claim 1, it is characterised in that: in step C, described temperature retention time is 30min.
9. the surface treatment method for thermal spraying inorganic coating as claimed in claim 1, it is characterised in that: the soluble metal salt solution of described conduction is the Al (NO of 0.5mol/L3)3Aqueous solution.
10. the surface treatment method for thermal spraying inorganic coating as claimed in claim 1, it is characterised in that: the soluble metal salt solution of described conduction is the Zr (NO of 0.5mol/L3)4Alcoholic solution.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310686769.9A CN103668344B (en) | 2013-12-16 | 2013-12-16 | Surface treatment method for thermal spraying inorganic coating |
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| CN201310686769.9A CN103668344B (en) | 2013-12-16 | 2013-12-16 | Surface treatment method for thermal spraying inorganic coating |
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| CN103668344A CN103668344A (en) | 2014-03-26 |
| CN103668344B true CN103668344B (en) | 2016-07-20 |
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| CN201310686769.9A Expired - Fee Related CN103668344B (en) | 2013-12-16 | 2013-12-16 | Surface treatment method for thermal spraying inorganic coating |
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| CN109870402A (en) * | 2019-03-04 | 2019-06-11 | 西南交通大学 | A kind of liquid alkali metal Dynamic Corrosion experimental provision |
| CN110923615A (en) * | 2019-12-17 | 2020-03-27 | 江苏启迪合金有限公司 | Electrochemical impregnation modified damping wear-resistant coating and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0927774A1 (en) * | 1997-04-28 | 1999-07-07 | Nippon Steel Hardfacing Co., Ltd. | Member for molten metal bath, provided with composite sprayed coating having excellent corrosion resistance and peeling resistance against molten metal |
| EP1048745A1 (en) * | 1998-09-19 | 2000-11-02 | Nippon Steel Hardfacing Co., Ltd. | Method for producing member for molten metal bath having coating film excellent in resistance to corrosion by molten metal |
| CN102534613A (en) * | 2011-12-19 | 2012-07-04 | 北京矿冶研究总院 | Novel composite structure coating and preparation method thereof |
| CN102719782A (en) * | 2012-06-28 | 2012-10-10 | 大连理工大学 | Treatment method for improving oxidation resistance of thermal barrier coating (TBC) bonding layer |
| CN103374694A (en) * | 2012-04-24 | 2013-10-30 | 中国石油天然气股份有限公司 | Preparation method for anti-corrosion composite coating of oil pipe |
-
2013
- 2013-12-16 CN CN201310686769.9A patent/CN103668344B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0927774A1 (en) * | 1997-04-28 | 1999-07-07 | Nippon Steel Hardfacing Co., Ltd. | Member for molten metal bath, provided with composite sprayed coating having excellent corrosion resistance and peeling resistance against molten metal |
| EP1048745A1 (en) * | 1998-09-19 | 2000-11-02 | Nippon Steel Hardfacing Co., Ltd. | Method for producing member for molten metal bath having coating film excellent in resistance to corrosion by molten metal |
| CN102534613A (en) * | 2011-12-19 | 2012-07-04 | 北京矿冶研究总院 | Novel composite structure coating and preparation method thereof |
| CN103374694A (en) * | 2012-04-24 | 2013-10-30 | 中国石油天然气股份有限公司 | Preparation method for anti-corrosion composite coating of oil pipe |
| CN102719782A (en) * | 2012-06-28 | 2012-10-10 | 大连理工大学 | Treatment method for improving oxidation resistance of thermal barrier coating (TBC) bonding layer |
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