CN101648273A - Method for preparing zinc-nickel alloy powder and application thereof - Google Patents
Method for preparing zinc-nickel alloy powder and application thereof Download PDFInfo
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- CN101648273A CN101648273A CN200910063904A CN200910063904A CN101648273A CN 101648273 A CN101648273 A CN 101648273A CN 200910063904 A CN200910063904 A CN 200910063904A CN 200910063904 A CN200910063904 A CN 200910063904A CN 101648273 A CN101648273 A CN 101648273A
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Abstract
The invention relates to a method for preparing zinc-nickel alloy powder by a high-energy ball milling machine through alloying. The method comprises the following steps: putting 50-80% of zinc powder, 20-50% of nickel powder and a ball milling medium together into a ball milling tank according to the quality, carrying out ball milling in a wet method, obtaining slurry, then taking out the slurry,putting in vacuum, baking and forming a powder material used for spraying, or obtaining the zinc-nickel alloy powder with larger particle diameter after spraying and granulating the powder, wherein the sum of the raw materials of the zinc powder and the nickel powder is 100%. The zinc-nickel alloy powder prepared by the method can be used as a hot spraying material for a sticking bottom layer ofan electric potential of an electrode for resisting sea water corrosion, or independently used as a hot spraying material for a cathode protection coating for use. Compared with a smelting atomizationmethod, a low-pressure supersaturation method and an atomization method which are used for preparing the zinc-nickel alloy powder formerly, the invention has the advantages of less technological process, simple operation, low preparation cost, energy saving and the like and is suitable for the continuous scale industrial production.
Description
Technical field
The present invention relates to the material field, particularly relate to a kind of preparation method and application thereof of zinc-nickel alloy powder.
Background technology
The corrosion of metal in adverse circumstances such as ocean is very serious, and boats and ships, ocean steel construction long term exposure are in hot and humid and salt mist environment, and corrosion failure is serious, and the fault of Yin Faing constitutes a serious threat to the performance of navigation safety and device thus.Wherein, electrochemical corrosion is to the destruction maximum of metal.The method that general electrochemically resistant corrosion is both at home and abroad generally adopted is that sacrificial anode or the negative electrode that adds cathode current protect.Promptly when the electrode potential of coating is lower than steel substrate, at first can be to the low coating of electrode potential through the row corrosion, thus metallic matrix is played a good protection.
It is lower than the electrode potential of iron and steel as a kind of cathodic protection layer for the admiro coating; when being in corrosive environment; at first the admiro coating is corroded; and the corrosion rate of admiro itself is slower more than 10 times than common iron and steel; therefore admiro is a kind of very excellent corrosion-resistant finishes; with the Ni-Al that generally uses; the alloy coat of Ni-Cr coating and zinc is compared; the admiro coating has lower electrode potential; and corrosion rate is lower; therefore, admiro is a kind of corrosion-resistant electronegative potential coating material of high-quality more.
The method for preparing zinc-nickel alloy powder both at home and abroad mainly contains following two kinds:
1. melting atomization, this method is by melting zinc-nickel molten metal, forms alloy by spray gun in spray chamber.
2. low pressure supersaturation atomization, this method need under low pressure atomize zinc-nickel supersaturation metal liquid under hydrogen and protection of nitrogen gas.
The drawback of above-mentioned two kinds of methods is that energy consumption is big, molten metal need be warming up to more than 1543 ℃; Adopt smelting process, link is dealt with improperly and is caused the powder oxidation easily; After adopting the powder spraying of low pressure supersaturation atomization preparation, easily form the micro cell in rich zinc district and rich nickel district, produce the microcell galvanic corrosion, be unfavorable for material protection; These two kinds of preparation method's complex process, and high-energy ball milling machinery alloyage process is compared relatively, and these two kinds of method flour extractions are comparatively low.
Summary of the invention
Technical problem to be solved by this invention is: a kind of preparation method who is suitable for the zinc-nickel alloy powder of large-scale industrial production is provided, the zinc-nickel alloy powder of this method preparation is low cost of manufacture not only, and is a kind of novel bonding primer of electrode potential that is suitable for the hot-spraying technique anti-seawater corrosion.
The present invention solves its technical problem and adopts following technical scheme:
The present invention utilizes high-energy ball milling machinery alloying to prepare zinc-nickel alloy powder, this method is: according to the quality meter, zinc powder 50～80% and nickel powder 20～50% are put into ball grinder with ball-milling medium to carry out wet ball grinding and obtains slip, these two kinds of raw metal powder sums are 100%, then slip is taken out and places under the vacuum and dry, again through mist projection granulating and after obtain zinc-nickel alloy powder.
The granularity of described zinc powder is 5～10 μ m, and the granularity of nickel powder is 6～10 μ m.
Described ball-milling medium can adopt absolute ethyl alcohol.
In mechanical milling process, its technology mainly comprises selection, rotational speed of ball-mill and the ball milling time etc. of protective atmosphere.Specifically: employing vacuumizes logical argon protection technology and carries out ball milling.Rotational speed of ball-mill is 350～450r/min, and the ball milling time is 80～100h.
Slip is made reunion powder through atomization drying in the mist projection granulating tower, temperature is 120～160 ℃ in the mist projection granulating tower.Reunion powder is sieved, obtain the powder that granularity is 10～50 μ m.
The zinc-nickel alloy powder of the present invention preparation, it is as the material of the bonding bottom thermal spraying of electrode potential of anti-seawater corrosion or use as the cathodic protection coatings thermal spraying material separately.
The present invention compared with prior art has following main advantage:
The material of the present invention's preparation is widely used, and is a kind of novel low electrode current potential material that is suitable for the hot-spraying technique anti-seawater corrosion.The zinc-nickel powder coating that the present invention is prepared, electrode potential is-760mv/ECS in the seawater medium, and the electrode potential pact-550mv/ECS of ordinary carbon steel, significantly be lower than the electrode potential of carbon steel, Ni-Cr, Ni-Al, the electrode potential of NiCrAlY based material are between-620～650mv/ECS, so the material of the present invention's preparation is a kind of coating material of real low electrode current potential.By salt fog B-117-85 test standard, can obtain the powder of the present invention's preparation, corrosion resistance and good, salt air corrosion through 1000h, more than the high 8MPa of strength of coating of the powder of this technology preparation than several adhesive linkage coating materials preparations commonly used (than the high 8MPa of Ni-Cr, than the high 7MPa of Ni-Al than the high 10MPa of NiCrAlY based material).
The zinc-nickel alloy powder of the present invention preparation, existing relatively two kinds prepare zinc-nickel alloy powder technology (melting atomization low pressure supersaturation atomization) to compare technological process few; Low cost of manufacture (more energy-conservation 40% than melting atomization approximately, lower more than 50%) than low pressure supersaturation atomization; And other two kinds of methods can not be used as large-scale industrial production, and high-energy ball milling is suitable for large-scale industrial production.
The specific embodiment
For a better understanding of the present invention, further illustrate content of the present invention, but content of the present invention not only is confined to the following examples below in conjunction with the specific embodiment row
Embodiment 1:
Batching: getting granularity is the Zn powder 200g of 5～10 μ m and the nickel powder 200g of 6～10 μ m, absolute ethyl alcohol 100ml, and ratio of grinding media to material is 20: 1, rotational speed of ball-mill is 350r/min, ball milling time 100h, preparation alloy powder.Get material in the vacuum glove box, oven dry.
Mist projection granulating: by the quality percentage, get material powder 98%, binding agent 2%, it is mixed the back add 80% the absolute ethyl alcohol that is equivalent to material powder and binding agent gross mass, be deployed into slip.Say that with the centrifugal atomizing nozzle slurry atomization becomes fine dropping liquid spray as in the granulation tower, the atomizer rotating speed is 1600～1800r/min.The dropping liquid of atomizing relies on the surface tension of self to be shrunk to spherical, in hot blast, be shrunk to spherical, temperature is controlled in 120～160 ℃ of scopes in the granulation tower, and the adjusting of temperature height is collected the reunion powder of drying by air exhauster subsequently so that the abundant drying of powder is exceeded.
Screening: mist projection granulating gained reunion powder sieves, the reunion powder of getting 10～50 μ m get final product low electrode current potential resistant material.
Embodiment 2:
Batching: getting granularity is the Zn powder 120g of 5～10 μ m and the nickel powder 33g of 6～10 μ m, absolute ethyl alcohol 50ml, and ratio of grinding media to material is 10: 1, rotational speed of ball-mill is 450r/min, ball milling time 80h, preparation alloy powder.Get material in the vacuum glove box, oven dry.
Mist projection granulating: by the quality percentage, get material powder 98%, binding agent 2%, it is mixed the back add 80% the absolute ethyl alcohol that is equivalent to material powder and binding agent gross mass, be deployed into slip.Say that with the centrifugal atomizing nozzle slurry atomization becomes fine dropping liquid spray as in the granulation tower, the atomizer rotating speed is 1600～1800r/min.The dropping liquid of atomizing relies on the surface tension of self to be shrunk to spherical, in hot blast, be shrunk to spherical, temperature is controlled in 120～160 ℃ of scopes in the granulation tower, and the adjusting of temperature height is collected the reunion powder of drying by air exhauster subsequently so that the abundant drying of powder is exceeded.
Screening: mist projection granulating gained reunion powder sieves, the reunion powder of getting 10～50 μ m get final product the corrosion-resistant sprayed on material of low electrode current potential.
Embodiment 3:
Batching: getting granularity is the Zn powder 120g of 5～10 μ m and the nickel powder 70g of 6～10 μ m, absolute ethyl alcohol 70ml, and ratio of grinding media to material is 20: 1, rotational speed of ball-mill is 450r/min, ball milling time 70h, preparation alloy powder.Get material in the vacuum glove box, oven dry.
Mist projection granulating: by the quality percentage, get material powder 98%, binding agent 2%, it is mixed the back add 80% the absolute ethyl alcohol that is equivalent to material powder and binding agent gross mass, be deployed into slip.Say that with the centrifugal atomizing nozzle slurry atomization becomes fine dropping liquid spray as in the granulation tower, the atomizer rotating speed is 1600～1800r/min.The dropping liquid of atomizing relies on the surface tension of self to be shrunk to spherical, in hot blast, be shrunk to spherical, temperature is controlled in 120～160 ℃ of scopes in the granulation tower, and the adjusting of temperature height is collected the reunion powder of drying by air exhauster subsequently so that the abundant drying of powder is exceeded.
Screening: mist projection granulating gained reunion powder sieves, the reunion powder of getting 10～50 μ m get final product the corrosion-resistant sprayed on material of low electrode current potential.
Embodiment 4:
Batching: getting granularity is the Zn powder 120g of 5～10 μ m and the nickel powder 70g of 6～10 μ m, absolute ethyl alcohol 70ml, and ratio of grinding media to material is 20: 1, rotational speed of ball-mill is 450r/min, ball milling time 70h, preparation alloy powder.Get material in the vacuum glove box, oven dry.
Screening: oven dry gained powder directly sieves, and the powder of getting particle diameter 1～3 μ m gets final product to such an extent that required low electrode current potential resistant material sprays.
Claims (8)
1. the preparation method of a zinc-nickel alloy powder, it is characterized in that utilizing high-energy ball milling machinery alloying to prepare zinc-nickel alloy powder, specifically: according to the quality meter, zinc powder 50～80% and nickel powder 20～50% are put into ball grinder with ball-milling medium to carry out wet ball grinding and obtains slip, these zinc powder nickel powder raw material sums are 100%, then slip is taken out and places under the vacuum and dry the powder that is formed for spraying; Or powder obtained the bigger zinc-nickel alloy powder of particle diameter again behind mist projection granulating.
2. the preparation method of zinc-nickel alloy powder according to claim 1, the granularity that it is characterized in that zinc powder is 5～10 μ m.
3. the preparation method of zinc-nickel alloy powder according to claim 1, the granularity that it is characterized in that nickel powder is 6～10 μ m.
4. the preparation method of zinc-nickel alloy powder according to claim 1 is characterized in that described ball-milling medium adopts absolute ethyl alcohol.
5. the preparation method of zinc-nickel alloy powder according to claim 1 is characterized in that employing vacuumizes logical argon protection technology and carries out ball milling, and during ball milling, the rotational speed of ball-mill of employing is 350～450r/min, and the ball milling time is 70～100h.
6. the preparation method of zinc-nickel alloy powder according to claim 1 is characterized in that slip is made reunion powder through atomization drying in the mist projection granulating tower, and temperature is 120～160 ℃ in the mist projection granulating tower.
7. the preparation method of zinc-nickel alloy powder according to claim 6 is characterized in that reunion powder is sieved, and obtains the powder that granularity is 1～50 μ m.
8. one kind according to the prepared zinc-nickel alloy powder of arbitrary claim in the claim 1 to 7, it is characterized in that this zinc-nickel alloy powder is as the material of the bonding bottom thermal spraying of electrode potential of anti-seawater corrosion or use as the cathodic protection coatings thermal spraying material separately.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214488A (en) * | 2011-05-31 | 2011-10-12 | 航天材料及工艺研究所 | Boron-carbide-containing graphite absorber ball and preparation process thereof |
| CN102424968A (en) * | 2011-11-22 | 2012-04-25 | 中国航空工业集团公司北京航空材料研究院 | Method for anticorrosion protective coating for high-strength steel |
| CN102775826A (en) * | 2012-08-10 | 2012-11-14 | 昆山乔锐金属制品有限公司 | Zinc-nickel coating material of ferrous products |
| CN103147034A (en) * | 2013-03-21 | 2013-06-12 | 齐齐哈尔大学 | Preparation method of metal/modified basalt composite powder used for thermal spraying technology |
| CN105583403A (en) * | 2016-01-21 | 2016-05-18 | 中核(天津)科技发展有限公司 | Pelletizing method for copper-nickel alloy powder |
| CN106270486A (en) * | 2016-08-30 | 2017-01-04 | 安徽克里斯特新材料有限公司 | Double particle powder of a kind of Ni Al and preparation method thereof |
| CN106735256A (en) * | 2016-12-05 | 2017-05-31 | 四川理工学院 | A kind of Ni nanoparticle Zn powders and preparation method thereof |
| CN108726581A (en) * | 2018-06-06 | 2018-11-02 | 江西理工大学 | The method for preparing iron-doped nickel oxide using Ni-Fe alloy melts |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4915906A (en) * | 1988-06-17 | 1990-04-10 | Canadian Patents And Development Limited/Societie Canadienne Des Brevets Et D'exploitation Limitee | Novel zinc-based alloys, preparation and use thereof for producing thermal-sprayed coatings having improved corrosion resistance and adherence |
-
2009
- 2009-09-08 CN CN2009100639048A patent/CN101648273B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214488A (en) * | 2011-05-31 | 2011-10-12 | 航天材料及工艺研究所 | Boron-carbide-containing graphite absorber ball and preparation process thereof |
| CN102424968A (en) * | 2011-11-22 | 2012-04-25 | 中国航空工业集团公司北京航空材料研究院 | Method for anticorrosion protective coating for high-strength steel |
| CN102424968B (en) * | 2011-11-22 | 2013-10-16 | 中国航空工业集团公司北京航空材料研究院 | Method for anticorrosion protective coating for high-strength steel |
| CN102775826A (en) * | 2012-08-10 | 2012-11-14 | 昆山乔锐金属制品有限公司 | Zinc-nickel coating material of ferrous products |
| CN103147034A (en) * | 2013-03-21 | 2013-06-12 | 齐齐哈尔大学 | Preparation method of metal/modified basalt composite powder used for thermal spraying technology |
| CN105583403A (en) * | 2016-01-21 | 2016-05-18 | 中核(天津)科技发展有限公司 | Pelletizing method for copper-nickel alloy powder |
| CN106270486A (en) * | 2016-08-30 | 2017-01-04 | 安徽克里斯特新材料有限公司 | Double particle powder of a kind of Ni Al and preparation method thereof |
| CN106270486B (en) * | 2016-08-30 | 2018-07-10 | 安徽克里斯特新材料有限公司 | A kind of preparation method of the bis- particle powders of Ni-Al |
| CN106735256A (en) * | 2016-12-05 | 2017-05-31 | 四川理工学院 | A kind of Ni nanoparticle Zn powders and preparation method thereof |
| CN108726581A (en) * | 2018-06-06 | 2018-11-02 | 江西理工大学 | The method for preparing iron-doped nickel oxide using Ni-Fe alloy melts |
| CN108726581B (en) * | 2018-06-06 | 2020-05-19 | 江西理工大学 | Method for preparing nickel-iron oxide by using Ni-Fe alloy melt |
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