CN101748407A - Preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material - Google Patents
Preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material Download PDFInfo
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Abstract
The invention relates to a surface corrosion resistant technology of a metal material, in particular to a preparation method of a surface composite coating of a Tb-Dy-Fe magnetostrictive material. The preparation method comprises the following steps: firstly, carrying out preplating treatment; secondly, chemically plating nickel and phosphorus and electroplating a corrosion-resistant zinc-nickel alloy; and finally carrying out postplating treatment. A nickel layer and a matrix are well bonded; the composite coating is subjected to 10 times of thermal cycle tests; the coating is not separated from matrix metal and bubbling, strip stripping and layered stripping do not generate; and the coating has excellent performance in a neutral salt spray corrosion resistance test.
Description
Technical field
The present invention relates to a kind of preparation method of metal material surface aseptic technic, particularly a kind of surface composite coating of Tb-Dy-Fe magnetostrictive material.
Background technology
The terbium dysprosium ferrum giant magnetostrictive material is a kind of New Intelligent functional materials, and it basic composition is (Tb, Dy) Fe
1.7～2.0, typical composition is Tb
0.3Dy
0.7Fe
1.95, (Tb, Dy) Fe
1.7～2.0, all there are sale in Grirem Advance Materials Co., Ltd and Gansu Tianxing Rare-Earth Functional Material Co., Ltd..Its making method is at Acta Metallurgica Sinica, the 40th volume, the fourth phase, in April, 2004,378-382 page or leaf " directional freeze Tb-Dy-Fe heat treatment of alloy microstructure and property ", Chinese rare-earth journal, the 24th volume, the 3rd phase, in June, 2006,323-327 page or leaf " powder metallurgic method prepares the research of rare earth ultra-magnetostriction material ", application number are that 02121447.6 Chinese invention patent, application number are that 03154426.6 documents and materials such as Chinese invention patent are all on the books.
The terbium dysprosium ferrum giant magnetostrictive material has been widely used in high power low-frequency sonar system, the quick micrometric displacement stopper of high precision and the Active Vibration Control at present.But terbium dysprosium ferrum ultra-magnetic telescopic alloy middle-weight rare earths weight metal degree is up to 60%, and very easily oxidation in air is perishable in many environment, thereby makes the lost of life, therefore is necessary this material is taked corresponding anticorrosive measure.
In the prior art, application number is 200510137232.2 Chinese invention patent, introduced a kind of surface modification method of rare earth supermagnetostrictivmaterial material, formed protective layer at material surface, improved the material corrosion resistance by ionitriding, carburizing or carbonitriding technology; Its corrosion resistance adopts weight-loss method, and its test environment temperature is 150 ℃, the air of relative humidity 100%, autoclave pressure is 8.0 * 104Pa, kept 5 hours, the weightless quality of calculation sample, the corrosion weight loss of giant magnetostrictive material after treatment is 0.4%～2.14% before being untreated.
Application number is 200610001026.3 Chinese invention patent, introduced a kind of method for preparing the solidity to corrosion high resistance giant magnetostrictive material of axial preferred orientation, by in body material, adding the Si element, improved resistivity and the corrosion resistance nature of material in room temperature, the solidity to corrosion in 3.5% the NaCl aqueous solution has improved 2～8%.
Yet above-mentioned technology all is not to adopt modes such as electroless plating, plating to carry out surface anticorrosion to handle, and simulates the test examination of ocean environment, and the anticorrosion effect of metal is not clear under ocean environment.Therefore, need a kind of coating technology that the solidity to corrosion of terbium dysprosium ferrum material under ocean environment improved of exploitation, make surface-treated terbium dysprosium ferrum material, can keep possessing good salt spray corrosion resistance under the situation of good combination intensity with matrix, thereby can under ocean environment, realize application.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material, start with from electrochemical surface treatment technologies such as electroless plating, plating, research terbium dysprosium ferrum materials chemistry depositing process, plating zinc-nickel technology, make terbium dysprosium ferrum surface obtain electroless plating and composite electroplated coating, thereby prolong in the ocean environment work-ing life of core material terbium dysprosium ferrum in high power low-frequency sonar system, the quick micrometric displacement stopper of high precision and the Active Vibration Control.
For the purpose that realizes solving the problems of the technologies described above, with Tb
0.3Dy
0.7Fe
1.95Be the representative of terbium dysprosium ferrum material, the present invention has adopted following technical scheme:
The preparation method of a kind of surface composite coating of Tb-Dy-Fe magnetostrictive material of the present invention, preparation process is:
A, plating pre-treatment:
Employing is immersed sealing of hole processing in the fusion Zinic stearas with the terbium dysprosium ferrum giant magnetostrictive material, and the Zinic stearas temperature is 140～170 ℃, and the sealing of hole time is 10～30 minutes; The unnecessary Zinic stearas of material surface behind the removing sealing of hole, the metallic matrix of light extremely appears in the terbium dysprosium ferrum giant magnetostrictive material surface of polishing again, and with surperficial wiped clean; In degreaser, soak oil removing 5～20 minutes subsequently, and washing; Pickling is carried out in oil removing and the terbium dysprosium ferrum giant magnetostrictive material washed, the pickling after washing that finishes; Carry out activation treatment then, activate the after washing that finishes;
B, chemical plating nickel-phosphorus alloy:
To carry out chemical plating nickel-phosphorus alloy through the material of plating pre-treatment, then material surface be washed and dried up the surface;
C, electroplated zinc nickel alloy:
To carry out electroplated zinc nickel alloy through the material surface that electroless plating is handled, and electroplate zinc-nickel technology and comprise that at first carrying out sulfate liquor electroplates zinc-nickel technology, thickness of coating is 20～40 μ m; Carry out chloride soln then and electroplate zinc-nickel technology, thickness of coating is 45～65 μ m;
D, plating aftertreatment
To plate aftertreatment through galvanized material of two steps, and at first carry out passivation, washing and drying, and carry out sealing of hole then, and wipe unnecessary Zinic stearas behind the sealing of hole, naturally cooling in air obtains final composite deposite.
Described polishing terbium dysprosium ferrum giant magnetostrictive material surface, its concrete technical scheme are with No. 600 sand papering TbDyFe material surfaces, to the metallic matrix that light occurs, and with the absorbent cotton that contains acetone with surperficial wiped clean.
The concrete technical scheme of described immersion oil removing is: at 20～60 ℃, soak oil removing 5～20 minutes in the middle temperature weak base degreaser solution of 30～60g/L, and washing.
The concrete technical scheme of described pickling is: use the pickle solution that contains nitric acid 10～50ml/L, thiocarbamide 0.5～1.5g/L, 10～30 ℃ of temperature, pickling 10～50 seconds.
The technical scheme that described activation treatment is concrete is: use the activation solution that contains sulphosalicylic acid 10～30g/L, ammonium bifluoride 5～15g/L, 10～30 ℃ of temperature activate 20～40 seconds.
The concrete technical scheme of described chemical plating nickel-phosphorus alloy is: will carry out chemical nickel phosphorus plating through the terbium dysprosium ferrum giant magnetostrictive material of plating pre-treatment, technology is: chemical plating solution is single nickel salt 20～50g/L, inferior sodium phosphate 20～40g/L, lactic acid 10～25g/L, sodium-acetate 8～20g/L, Sodium Fluoride 0.2～1.0g/L, polyoxyethylene glycol 0.02～0.1g/L, pH 5～8, treatment temp is 80～90 ℃, and the treatment time is 20～40 minutes.
The concrete technical scheme of described electroplated zinc nickel alloy is: carry out vitriol earlier and electroplate zinc-nickel, the mass ratio of zinc sulfate and single nickel salt is 3: 1～7: 1, boric acid 15～25g/L, pH 3～6 in the electroplate liquid, electroplating temperature is at 10～40 ℃, and current density is 0.5～3A/dm
2, to electroplate 20～80 minutes, thickness of coating is 20～40 μ m; Carry out chloride soln then and electroplate zinc-nickel, the mass ratio that electroplate liquid consists of zinc chloride and nickelous chloride is 1: 2～2: 1, ammonium chloride 150～300g/L, pH 3～6, and electroplating temperature is at 10～40 ℃, and current density is 0.5～3A/dm
2, to electroplate 20～80 minutes, final thickness of coating is 45～65 μ m.
The concrete technical scheme of described plating aftertreatment is: the passivating process passivating solution consists of chromic anhydride 25～60g/L, phosphatase 11 0～20ml/L, nitric acid 4～10ml/L, sulfuric acid 4～10ml/L, hydrochloric acid 4～10ml/L, pH 0.5～2.0, the terbium dysprosium ferrum giant magnetostrictive material was soaked in above-mentioned solution 1～3 minute, take out in the air of back and stopped 5～15 seconds, washing then, and dry down in 50～80 ℃; Sealing of hole in the Zinic stearas melt is immersed in passivation and the dry material of crossing, and 10～30 minutes time, temperature is 140～170 ℃.
The described phosphoric acid of this patent, nitric acid, sulfuric acid, hydrochloric acid are respectively 85%, 69%, 98%, 36.5% laboratory common agents for mass concentration.
These concrete technical schemes can make up mutually or combination, thereby reach better technique effect.
The preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material of the present invention goes for the surface treatment of various terbium dysprosium ferrum giant magnetostrictive materials.
Owing to adopted above-mentioned process program, the present invention has following superiority:
1) coating and matrix bond are good.The composite deposite of preparation of the present invention is through 10 thermal cycling tests, and coating does not separate from matrix metal, does not see that bubbling, sheet peel off and delamination.
2) performance is good in the anti-neutral salt spray corrosion test of coating.According to ISO9227 " Corrosion testsin artificial atmospheres-Salt spray tests " the composite deposite sample that the present invention prepares is carried out neutral salt spray corrosion test, it corrosion occurs and corrosion expansion situation all is far superior to untreated contrast sample.
Embodiment
Embodiment 1
According to number of patent application is that 03154426.6 Chinese invention patent embodiment 1 described method makes Tb
0.3Dy
0.7Fe
1.95Giant magnetostrictive material is at first with the Tb of φ 7 * 5mm
0.3Dy
0.7Fe
1.95Stub sealing of hole 20 minutes in 160 ℃ Zinic stearas; The unnecessary Zinic stearas of material surface behind the employing soft cloth removing sealing of hole is used sand papering Tb again No. 600
0.3Dy
0.7Fe
1.95Material surface, to the metallic matrix that light occurs, and with the absorbent cotton that contains acetone with surperficial wiped clean; At 30 ℃, soak oil removing 15 minutes in the warm weak base degreaser solution among the Q121 that 50g/L Kaifeng peace enlightening plating chemical industry company limited produces subsequently, and washing; Be 25 ℃ in temperature then, filling a prescription is pickling in the pickle solution of nitric acid 20ml/L, thiocarbamide 1.0g/L 30 seconds, and washing; Be 20 ℃ in temperature subsequently, filling a prescription is activation in the activation solution of sulphosalicylic acid 15g/L, ammonium bifluoride 8g/L 30 seconds, and washing.
The prescription of chemical nickel plating phosphorus solution is that single nickel salt 30g/L, inferior sodium phosphate 25g/L, lactic acid 15g/L, sodium-acetate 15g/L, Sodium Fluoride 0.5g/L, polyoxyethylene glycol 0.05g/L, pH are 6.8～7.0, and keeping solution temperature is 85 ℃, with the Tb that activates and washed
0.3Dy
0.7Fe
1.95Giant magnetostrictive material chemical nickel phosphorus plating 30 minutes in above-mentioned solution.After chemical nickel phosphorus plating finishes, to Tb
0.3Dy
0.7Fe
1.95The surface of giant magnetostrictive material is washed, and dries up the surface with pressurized air.
After the electroless plating, electroplate again.The plating zinc-nickel is that zinc sulfate 230g/L, single nickel salt 50g/L, boric acid 20g/L, pH are 4.5～5 with the prescription of sulfate liquor, Tb
0.3Dy
0.7Fe
1.95Material is 1A/dm in current density
2, temperature was electroplated 45 minutes under 25 ℃ condition, and thickness of coating is 28 μ m.
The plating zinc-nickel is that zinc chloride 70g/L, nickelous chloride 80g/L, ammonium chloride 240g/L, pH are 4.5～5 with the prescription of chloride soln, Tb
0.3Dy
0.7Fe
1.95Material is 1A/dm in current density
2, temperature was electroplated 45 minutes under 25 ℃ condition, and the coating final thickness is 50 μ m.
The prescription of passivating solution is that chromic anhydride 40g/L, phosphatase 11 4ml/L, nitric acid 6ml/L, sulfuric acid 6ml/L, hydrochloric acid 6ml/L, pH are 1.0, with electric clad Tb
0.3Dy
0.7Fe
1.95Material soaked in passivating solution 2 minutes, and take out the back and in air, stopped 10 seconds, washing then, dry down in 65 ℃.
With passivation and the dry Tb that crosses
0.3Dy
0.7Fe
1.95Material soaks in 160 ℃ Zinic stearas and carried out sealing of hole in 20 minutes.Take out the back and wipe unnecessary Zinic stearas with soft cloth, naturally cooling in air.
The composite deposite light, blackish green, bonding force is good.
Embodiment 2
Will be from φ 15 * 8mm (Tb, Dy) Fe of Grirem Advance Materials Co., Ltd's buying
2Stub sealing of hole 30 minutes in 140 ℃ Zinic stearas; The unnecessary Zinic stearas of material surface behind the employing soft cloth removing sealing of hole is used sand papering Tb again No. 600
0.3Dy
0.7Fe
1.95Material surface, to the metallic matrix that light occurs, and with the absorbent cotton that contains acetone with surperficial wiped clean; At 20 ℃, soak oil removing 20 minutes in warm weak base degreaser among the Q121 of 30g/L (Kaifeng peace enlightening is electroplated chemical industry company limited and the produced) solution subsequently, and washing; Be 10 ℃ in temperature then, filling a prescription is pickling in the pickle solution of nitric acid 10ml/L, thiocarbamide 0.5g/L 50 seconds, and washing; Be 10 ℃ in temperature subsequently, filling a prescription is activation in the activation solution of sulphosalicylic acid 10g/L, ammonium bifluoride 5g/L 40 seconds, and washing.
The prescription of chemical nickel plating phosphorus solution is that single nickel salt 20g/L, inferior sodium phosphate 20g/L, lactic acid 10g/L, sodium-acetate 8g/L, Sodium Fluoride 0.2g/L, polyoxyethylene glycol 0.02g/L, pH are 6～7, and keeping solution temperature is 85 ℃, with the Tb that activates and washed
0.3Dy
0.7Fe
1.95Giant magnetostrictive material chemical nickel phosphorus plating 40 minutes in above-mentioned solution.After chemical nickel phosphorus plating finishes, to Tb
0.3Dy
0.7Fe
1.95The surface of giant magnetostrictive material is washed, and dries up the surface with pressurized air.
After the electroless plating, electroplate again.The plating zinc-nickel is that zinc sulfate 180g/L, single nickel salt 30g/L, boric acid 15g/L, pH are 4.5～5 with the prescription of sulfate liquor, Tb
0.3Dy
0.7Fe
1.95Material is 3A/dm in current density
2, temperature was electroplated 20 minutes under 10 ℃ condition, and thickness of coating is 30 μ m.
The plating zinc-nickel is zinc chloride 50g/L, nickelous chloride 50g/L, ammonium chloride 150g/L with the prescription of chloride soln, and pH is 4.5～5, Tb
0.3Dy
0.7Fe
1.95Material is 3A/dm in current density
2, temperature was electroplated 20 minutes under 25 ℃ condition, and the coating final thickness is 54 μ m.
The prescription of passivating solution is that chromic anhydride 25g/L, phosphatase 11 0ml/L, nitric acid 4ml/L, sulfuric acid 4ml/L, hydrochloric acid 4ml/L, pH are 1～1.5, with electric clad Tb
0.3Dy
0.7Fe
1.95Material soaked in passivating solution 3 minutes, and take out the back and in air, stopped 15 seconds, washing then, dry down in 50 ℃.
With passivation and the dry Tb that crosses
0.3Dy
0.7Fe
1.95Material sealing of hole 30 minutes in 140 ℃ Zinic stearas.Take out the back and wipe unnecessary Zinic stearas with soft cloth, naturally cooling in air.
The composite deposite light, blackish green, bonding force is good.
Embodiment 3
According to number of patent application is that 03154426.6 Chinese invention patent embodiment 1 described method makes Tb
0.3Dy
0.7Fe
1.95Giant magnetostrictive material is at first with the Tb of φ 7 * 5mm
0.3Dy
0.7Fe
1.95Stub sealing of hole 10 minutes in 170 ℃ Zinic stearas; The unnecessary Zinic stearas of material surface behind the employing soft cloth removing sealing of hole is used sand papering Tb again No. 600
0.3Dy
0.7Fe
1.95Material surface, to the metallic matrix that light occurs, and with the absorbent cotton that contains acetone with surperficial wiped clean; At 60 ℃, soak oil removing 5 minutes in warm weak base degreaser among the Q121 of 60g/L (Kaifeng peace enlightening is electroplated chemical industry company limited and the produced) solution subsequently, and washing; Be 30 ℃ in temperature then, filling a prescription is pickling in the pickle solution of nitric acid 50ml/L, thiocarbamide 1.5g/L 10 seconds, and washing; Be 30 ℃ in temperature subsequently, filling a prescription is activation in the activation solution of sulphosalicylic acid 10g/L, ammonium bifluoride 5g/L 40 seconds, and washing.
The prescription of chemical nickel plating phosphorus solution is that single nickel salt 20g/L, inferior sodium phosphate 20g/L, lactic acid 10g/L, sodium-acetate 8g/L, Sodium Fluoride 0.2g/L, polyoxyethylene glycol 0.02g/L, pH are 6～7, and keeping solution temperature is 90 ℃, with the Tb that activates and washed
0.3Dy
0.7Fe
1.95Giant magnetostrictive material chemical nickel phosphorus plating 40 minutes in above-mentioned solution.After chemical nickel phosphorus plating finishes, to Tb
0.3Dy
0.7Fe
1.95The surface of giant magnetostrictive material is washed, and dries up the surface with pressurized air.
After the electroless plating, electroplate again.The plating zinc-nickel is zinc sulfate 260g/L, single nickel salt 60g/L, boric acid 25g/L with the prescription of sulfate liquor, and pH is 3～4, Tb
0.3Dy
0.7Fe
1.95Material is 0.5A/dm in current density
2, temperature was electroplated 70 minutes under 25 ℃ condition, and thickness of coating is 24 μ m.
Tb
0.3Dy
0.7Fe
1.95Material plating zinc-nickel is zinc chloride 100g/L, nickelous chloride 100g/L, ammonium chloride 300g/L with the prescription of chloride soln, and pH is 3～4, is 0.5A/dm in current density
2, temperature was electroplated 60 minutes under 25 ℃ condition, and the coating final thickness is 48 μ m.
The prescription of passivating solution is that chromic anhydride 60g/L, phosphoric acid 20ml/L, nitric acid 10ml/L, sulfuric acid 10ml/L, hydrochloric acid 10ml/L, pH are 0.5～1, with electric clad Tb
0.3Dy
0.7Fe
1.95Material soaked in passivating solution 1 minute, and take out the back and in air, stopped 5 seconds, washing then, dry down in 80 ℃.
With passivation and the dry Tb that crosses
0.3Dy
0.7Fe
1.95Material sealing of hole 10 minutes in 170 ℃ Zinic stearas.Take out the back and wipe unnecessary Zinic stearas with soft cloth, naturally cooling in air.
The composite deposite light, blackish green, bonding force is good.
With reference to GB/T 5270-2005 adhesion strength review of test methods standard, adopt thermal shock test that the adhesion strength of coating is examined, sample is the Tb with composite deposite
0.3Dy
0.7Fe
1.95, its size is about φ 7 * 5mm, and thickness of coating is about 50 μ m.In stove sample is heated to 300 ℃, is placed on quenching in the room temperature then, cycle index is 10 times.Through 10 thermal cycling tests, the composite deposite among the embodiment 1～3 does not all separate from matrix metal, does not see that bubbling, sheet peel off and delamination;
According to ISO9227 " Corrosion tests in artificial atmospheres-Salt spray tests " to having the Tb of composite deposite among the embodiment 1～3
0.3Dy
0.7Fe
1.95Sample and do not carry out the surface-treated control sample and carry out neutral salt spray corrosion test.Test(ing) medium is 5% NaCl solution, at 80cm
2The salt fog deposition is 1～2ml/h on the area, and the pH value is 6.5～7.2, and test temperature is 35 ℃, sprayed continuously 120 hours, every day the viewing test situation.Red rust appears in control sample behind the 24h salt spray corrosion test; Behind the 68h salt spray corrosion test, embodiment 1 and 3 samples begin to occur white rust; Behind the 72h salt spray corrosion test, embodiment 2 samples begin to occur white rust, and embodiment 1 and 3 sample white rusts increase the weight of; After the 120h corrosion test, though embodiment 1～3 specimen surface white rust is increasing the weight of, do not occur but still there is red rust, illustrate that matrix is corroded, and the red embroidery of control sample increases the weight of very, matrix is heavy corrosion.
Claims (8)
1. the preparation method of a surface composite coating of Tb-Dy-Fe magnetostrictive material, preparation process is:
A, plating pre-treatment:
Employing is immersed sealing of hole processing in the fusion Zinic stearas with the terbium dysprosium ferrum giant magnetostrictive material, and the Zinic stearas temperature is 140～170 ℃, and the sealing of hole time is 10～30 minutes; The unnecessary Zinic stearas of material surface behind the removing sealing of hole, the metallic matrix of light extremely appears in the terbium dysprosium ferrum giant magnetostrictive material surface of polishing again, and with surperficial wiped clean; In degreaser, soak oil removing 5～20 minutes subsequently, and washing; Pickling is carried out in oil removing and the terbium dysprosium ferrum giant magnetostrictive material washed, the pickling after washing that finishes; Carry out activation treatment then, activate the after washing that finishes;
B, chemical plating nickel-phosphorus alloy:
To carry out chemical plating nickel-phosphorus alloy through the terbium dysprosium ferrum giant magnetostrictive material of plating pre-treatment, then material surface be washed and dried up the surface;
C, electroplated zinc nickel alloy:
To carry out electroplated zinc nickel alloy through the terbium dysprosium ferrum giant magnetostrictive material surface that electroless plating is handled, and electroplate zinc-nickel technology and comprise that at first carrying out sulfate liquor electroplates zinc-nickel technology, thickness of coating is 20～40 μ m; Carry out chloride soln then and electroplate zinc-nickel technology, thickness of coating is 45～65 μ m;
D, plating aftertreatment
To plate aftertreatment through galvanized terbium dysprosium ferrum giant magnetostrictive material of two steps, and at first carry out passivation, washing and drying, and carry out sealing of hole then, and wipe unnecessary Zinic stearas behind the sealing of hole, naturally cooling in air obtains final composite deposite.
2. the preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material according to claim 1, it is characterized in that: described polishing terbium dysprosium ferrum giant magnetostrictive material surface, adopt sand papering TbDyFe material surface No. 600, to the metallic matrix that light occurs, and with the absorbent cotton that contains acetone with surperficial wiped clean.
3. the preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material according to claim 1, it is characterized in that: described immersion oil removing is at 20～60 ℃, soak oil removing 5～20 minutes in the middle temperature weak base degreaser solution of 30～60g/L, and washing.
4. the preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material according to claim 1, it is characterized in that: described pickling is to use the pickle solution that contains nitric acid 10～50ml/L, thiocarbamide 0.5～1.5g/L, 10～30 ℃ of temperature, pickling 10～50 seconds.
5. the preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material according to claim 1, it is characterized in that: described activation treatment is to use the activation solution that contains sulphosalicylic acid 10～30g/L, ammonium bifluoride 5～15g/L, 10～30 ℃ of temperature activate 20～40 seconds.
6. the preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material according to claim 1, it is characterized in that: the concrete technical scheme of described chemical plating nickel-phosphorus alloy is to carry out chemical nickel phosphorus plating through the terbium dysprosium ferrum giant magnetostrictive material of plating pre-treatment, chemical plating solution is single nickel salt 20～50g/L, inferior sodium phosphate 20～40g/L, lactic acid 10～25g/L, sodium-acetate 8～20g/L, Sodium Fluoride 0.2～1.0g/L, polyoxyethylene glycol 0.02～0.1g/L, pH 5～8, treatment temp is 80～90 ℃, and the treatment time is 20～40 minutes.
7. the preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material according to claim 1, it is characterized in that: the concrete technical scheme of described electroplated zinc nickel alloy is to carry out vitriol earlier to electroplate zinc-nickel, the mass ratio of zinc sulfate and single nickel salt is 3: 1～7: 1, boric acid 15～25g/L, pH 3～6 in the electroplate liquid, electroplating temperature is at 10～40 ℃, and current density is 0.5～3A/dm
2, to electroplate 20～80 minutes, thickness of coating is 20～40 μ m; Carry out chloride soln then and electroplate zinc-nickel, the mass ratio that electroplate liquid consists of zinc chloride and nickelous chloride is 1: 2～2: 1, ammonium chloride 150～300g/L, pH 3～6, and electroplating temperature is at 10～40 ℃, and current density is 0.5～3A/dm
2, to electroplate 20～80 minutes, final thickness of coating is 45～65 μ m.
8. the preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material according to claim 1, it is characterized in that: the concrete technical scheme of described plating aftertreatment is: the passivating process passivating solution consists of chromic anhydride 25～60g/L, phosphatase 11 0～20ml/L, nitric acid 4～10ml/L, sulfuric acid 4～10ml/L, hydrochloric acid 4～10ml/L, pH 0.5～2.0, the terbium dysprosium ferrum giant magnetostrictive material was soaked in above-mentioned solution 1～3 minute, take out in the air of back and stopped 5～15 seconds, washing then, and dry down in 50～80 ℃; Sealing of hole in the Zinic stearas melt is immersed in passivation and the dry material of crossing, and 10～30 minutes time, temperature is 140～170 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102383155A (en) * | 2011-11-16 | 2012-03-21 | 中国船舶重工集团公司第七二五研究所 | Zinc-nickel alloy electrolyte and preparation method of plating layer thereof |
| CN103484870A (en) * | 2013-09-17 | 2014-01-01 | 国家电网公司 | Surface treatment method for improving corrosion resistance of grounding wires |
| CN104120419A (en) * | 2014-07-18 | 2014-10-29 | 安徽铖友汽车零部件制造有限公司 | Brass surface passivation treating agent and application method thereof |
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2010
- 2010-01-20 CN CN201010030215XA patent/CN101748407B/en not_active Expired - Fee Related
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| CN103484870A (en) * | 2013-09-17 | 2014-01-01 | 国家电网公司 | Surface treatment method for improving corrosion resistance of grounding wires |
| CN104120419A (en) * | 2014-07-18 | 2014-10-29 | 安徽铖友汽车零部件制造有限公司 | Brass surface passivation treating agent and application method thereof |
| CN104368818A (en) * | 2014-10-24 | 2015-02-25 | 苏州莱特复合材料有限公司 | Iron-based powder metallurgical material electroplating technology |
| CN105039952A (en) * | 2015-06-29 | 2015-11-11 | 北京鼎臣超导科技有限公司 | Passivating blackening liquid for nickel-plated surface of neodymium-iron-boron magnet and application of passivating blackening liquid |
| CN105039952B (en) * | 2015-06-29 | 2017-08-25 | 北京鼎臣超导科技有限公司 | A kind of passivation hair blackening liquid and its application for neodymium iron boron magnetic body nickel plating surface |
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| CN110358959A (en) * | 2018-04-09 | 2019-10-22 | 有研稀土新材料股份有限公司 | A kind of magnetostrictive thin film composite material and preparation method |
| CN112097965A (en) * | 2020-09-29 | 2020-12-18 | 刘翡琼 | Pressure detector based on magnetostrictive material |
| CN112097965B (en) * | 2020-09-29 | 2022-05-06 | 江门市润宇传感器科技有限公司 | Pressure detector based on magnetostrictive material |
| CN114959698A (en) * | 2022-06-30 | 2022-08-30 | 光华科学技术研究院(广东)有限公司 | Coating, method for the production thereof and component |
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