CN102011144A - Nickel-based alloy material suitable for inert anode of metal molten salt electrolyzer - Google Patents
Nickel-based alloy material suitable for inert anode of metal molten salt electrolyzer Download PDFInfo
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- 239000000956 alloy Substances 0.000 title claims abstract description 85
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 45
- 239000002184 metal Substances 0.000 title claims abstract description 44
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title abstract description 58
- 229910052759 nickel Inorganic materials 0.000 title abstract description 25
- 150000003839 salts Chemical class 0.000 title abstract description 8
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 54
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 46
- 229910052742 iron Inorganic materials 0.000 claims abstract description 27
- 229910052802 copper Inorganic materials 0.000 claims abstract description 19
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 14
- 229910052746 lanthanum Inorganic materials 0.000 claims description 8
- 229910052718 tin Inorganic materials 0.000 claims description 8
- 229910052727 yttrium Inorganic materials 0.000 claims description 7
- 238000005275 alloying Methods 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 5
- 229910052684 Cerium Inorganic materials 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 229910052706 scandium Inorganic materials 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 39
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 35
- 238000005260 corrosion Methods 0.000 abstract description 17
- 230000007797 corrosion Effects 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 12
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- 239000010949 copper Substances 0.000 description 21
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- 238000005266 casting Methods 0.000 description 12
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- 239000000463 material Substances 0.000 description 6
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- 239000011651 chromium Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910001092 metal group alloy Inorganic materials 0.000 description 5
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- 229910003271 Ni-Fe Inorganic materials 0.000 description 4
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- 238000002360 preparation method Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- -1 sodium aluminum fluoride Chemical compound 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910000863 Ferronickel Inorganic materials 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
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- 238000011065 in-situ storage Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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- 229910017827 Cu—Fe Inorganic materials 0.000 description 1
- 229910017091 Fe-Sn Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical group [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
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- 229910017142 Fe—Sn Inorganic materials 0.000 description 1
- 229910000792 Monel Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- UOBPHQJGWSVXFS-UHFFFAOYSA-N [O].[F] Chemical compound [O].[F] UOBPHQJGWSVXFS-UHFFFAOYSA-N 0.000 description 1
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- 239000010941 cobalt Substances 0.000 description 1
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- GSOLWAFGMNOBSY-UHFFFAOYSA-N cobalt Chemical compound [Co][Co][Co][Co][Co][Co][Co][Co] GSOLWAFGMNOBSY-UHFFFAOYSA-N 0.000 description 1
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- 150000002222 fluorine compounds Chemical class 0.000 description 1
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- 229910001026 inconel Inorganic materials 0.000 description 1
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- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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- Electrolytic Production Of Metals (AREA)
Abstract
The invention provides a nickel-based alloy material suitable for an inert anode of a metal molten salt electrolyzer, relates to metal molten salt electrolysis, in particular to an alloy material suitable for carbon-free metal-based alloy inert anode of an aluminum electrolyzer. The nickel-based alloy material is characterized by comprising the following components in percentage by mass: 5 to 20 percent of Cu, 3 to 15 percent of Al, 15 to 50 percent of Fe, and the balance of Ni. By the invention, the alloy material suitable for the inert anode of the metal molten salt electrolyzer is obtained, and is suitable for a low-temperature (700 to 850 DEG C) electrolysis system. The alloy anode expresses excellent high-temperature oxidation resistance and electrolysis corrosion resistance in the electrolyzing process, and the quality of an electrolyzed aluminum product reaches over 99.7 percent.
Description
Technical field
Be applicable to the nickel-bass alloy material of inert anode of metal fused-salt electrolysis cell, particularly a kind of molten salt electrolysis of metals is particularly useful for the alloy material of carbon-free, the metal matrix inert anode of aluminium cell.
Background technology
As light metal, the application of aluminium and alloy thereof is significant for the saving of global energy, and for pursuing the Sustainable development of former Aluminium Electrolysis process, needs solution energy consumption is huge seriously to wait serial problem with environmental pollution.
At present, the widespread use in many metal metallurgy smelting fused salt electrolysis industry of the carbon anode of easy consumption is as smelting of aluminium, rare earth metal etc.Than traditional carbon anode, the development of inert anode material and inert anode technology in the production process of primary aluminum and other metal, can be saved the energy significantly; With the carbon anode of the alternative easy consumption of inert anode, the anode bubbing is by the CO that causes Greenhouse effect
2With strong greenhouse gases-fluorocarbon (as CF
4And C
2F
6) replace with oxygen; Simultaneously, the application of inert anode can reduce the primary aluminum production cost significantly, as the floor space of dwindling electrolyzer, reduces the manufacturing expense of carbon anode, and the input of economizing on the use of funds improves primary aluminum quality etc.
Become metal at metal oxide by electrolysis for production, especially aluminum oxide is smelted in fused salt electrolysis plastome in the process of primary aluminum, and the use of inert anode in electrolyzer obtained the extensive concern and the further investigation of industry member.The more inert anode material of research mainly comprises stupalith, cermet material and metal alloy compositions at present.Because stupalith and sintering metal have the defective that itself is difficult to overcome, poor as electroconductibility, be difficult for being connected, being difficult to shape etc. with thermal shock resistance, and metal alloy does not have above defective, is to have the inert anode material that hope obtains commercial applications most.
Nickel-base alloy is important corrosion-resistant material, in galvanic corrosion and chemical corrosion environment, all have good performances such as anti-general corrosion, local corrosion and stress corrosion, its comprehensive anti-corrosion capability is good more than stainless steel and other corrosion-resistant metallic material, especially is suitable for harsh bad border under the modern industrial technology.Because Ni has great solid solution ability for Cu, Fe, Cr, W and Mo etc., these alloy elements are given nickel excellent corrosion resistant performance more, form various compositions extensively, the serial nickle-base corrosion-resisting material of excellent corrosion-proof performance, and make it become the more satisfactory selection of inert anode material.
Patent US4956068, US5069771 have described with nickel based super alloy such as Inconel, Monel etc. as body, skin is an alloy coat, it consists of nickel/cobalt/iron of (mass percent): 55-90%, the chromium of 10-30%, about 15% aluminium, titanium, zirconium, yttrium, hafnium, niobium, the outer layer metal coating forms oxide ceramic layer through surface treatment, can stop the corrosion of Sauerstoffatom to body material.
Patent US 5510008 has described a kind of anode, and this anode obtains the porous metal matrix by powder such as nickel, iron, aluminium, copper through microwave sintering.Alloying element consists of the nickel of (mass percent): 60-67%, the aluminium of 3-10%, the iron of 5-20%, the copper of 5-15%.Porous metal form the rich ferriferous oxide skin with electrochemical activity through the original position anodic polarization.The sodium aluminum fluoride of good fluidity can be penetrated into the porous metal matrix in oxide film forming process, and hinder ionogen and when electrolytic reaction takes place, further permeate from the anode active outer layer, can the holding anode inner base still be the electrochemistry inertia like this.
Patent US 6361680 has described a kind of production method and material composition that is applicable to the used for aluminium electrolysis inert anode, and this anode is by nickel, aluminium, iron, copper and at least a active element such as silicon, and tin, zinc, vanadium, indium, hafnium, tungsten and rare earth element are formed.Behind the microwave sintering matrix be metal with intermetallic compound mutually, matrix surface is an oxide skin, this oxide skin can carry out anodic polarization and obtain in containing the electrolysis of fluorides matter of aluminum oxide, perhaps carry out pyroprocessing and obtain in the oxygen atmosphere.Oxide skin comprises the outer and rich aluminium inertia internal layer of rich ironwork usually.
Patent US 6562224 has described a kind of making method that is used for aluminum electrolyzing cell used inert anode, and this anode is made up of the Ni-Fe matrix, and in oxygen atmosphere or air preoxidation, the preoxidation optimum temps is 1000-1100 ℃ before putting into electrolyzer.Stick one deck ferriferous oxide skin at the Ni-Fe matrix surface after the preoxidation, as Fe
2O
3, this skin has poor conduction to oxonium ion, simultaneously the free oxygen atom is had folk prescription to conduction, can reduce oxygen diffusion to Ni-Fe matrix inside in electrolytic process.
Patent US 6878247, US20030066755A1 have described a kind of inert anode that is used for electrolysis of aluminum, and as body portion, matrix is outer to obtain the rich nickel dam of porous by surface treatment to this anode, can improve the electrochemical activity of outer surface like this by the Ni-Fe alloy.Outermost layer is the ferronickel oxide ceramic layer, and this ceramic layer is attached on the rich nickel dam of porous, can improve the refractory brine corrosion performance of anode material.In use, the hole of the rich nickel dam of outside porous is some or all of is filled by the oxide compound of iron and nickel, fluorochemical and oxygen fluorine cpd.
It is ferrous alloy that patent US20040216995A1 has described a kind of internal layer, skin is nickel-ferro alloy layer (Fe/Ni is than being 1-3), by adding the velocity of diffusion of rare earth element control ferro element, can slow down ferro element on the one hand enters the ionogen from the oxide skin dissolving, can reduce outer ferriferous oxide thicknesses of layers on the other hand, increase rete and bonding force matrix, stop ionogen to enter that matrix is inner to be corroded.Suitable rare earth element comprises Sc, Y, the lanthanum rare earth, and as La, Ce, Yb etc., its addition is 0.75-2.25%, optimum addition is 1-2%.
Patent US20050205431A1 has described a kind of nickel-base alloy anode, and its component mass percent is: the nickel of 20-60%, the iron of 5-15%, the aluminium of 1.5-5%, the rare earth element of 0-2%, other elements of 0-2%, as Mn, Si, C etc., remain and be Fe, keep Cu/Ni than being 0.2-0.3.This alloy adopts sand mold casting, and original position generates the thick oxide film of 0.1-1.0mm in electrolytic process, and electrolysis voltage is 3.5-4.0V, can be less than 0.03% when impurity Ni content is optimum in the primary aluminum.
Patent US2007278107 has described a kind of metal inert anode, and this anode is applicable in the aluminium cell that it is formed and mainly comprises nickel, copper, iron, tin.The alloy mass percentage composition is: the nickel of 15-50%, and the copper of 10-70%, the tin of 1-15% remains and is iron.Further the composition of optimizing is: the nickel of 20-30%, and the copper of 10-20%, the tin of 2-5% remains and is iron.Than the Ni-Cu-Fe metal anode, because the increase of surface film oxide conductivity, the Ni-Cu-Fe-Sn anode in use can reduce voltage, thereby has more excellent performance.
Patent CN 1896327A has described a kind of inert anode material for aluminium electrolysis, its component comprises nickel, iron, aluminium, copper, and the alloying element compositing range is the nickel of (mass percent): 50-70%, the iron of 10-30%, the aluminium of 4-10%, the copper of 8-12%.
Though, still do not have the inert anode material of success to enter industrial application at present to being that the inert anode material of target has been carried out research and exploration extensively and profoundly to replace carbon anode.Currently still need to seek more suitable inert anode material, these anode materials need have better robust and interference free performance to temperature fluctuation and the electrolyte ingredient fluctuation that is caused by the distribution of current inequality.
Summary of the invention
The present invention seeks to the deficiency that exists at above-mentioned prior art, provide a kind of corrosion resistance good, can effectively improve electrolytic efficiency, reduce and pollute, can satisfy the alloy material that is applicable to inert anode of metal fused-salt electrolysis cell that industrial application requires.
The objective of the invention is to be achieved through the following technical solutions.
Be applicable to the nickel-bass alloy material of inert anode of metal fused-salt electrolysis cell, it is characterized in that its nickel-bass alloy material comprises Cu, Al and Fe, the quality proportioning of each component is Cu:5%-20%, Al:3%-15%, and Fe:15%-50%, surplus is Ni.
The nickel-bass alloy material that is applicable to inert anode of metal fused-salt electrolysis cell of the present invention is characterized in that the component of this nickel-bass alloy material also comprises rare earth element, and the quality proportioning of rare earth element is 0.05%-5%.
The nickel-bass alloy material that is applicable to inert anode of metal fused-salt electrolysis cell of the present invention is characterized in that described rare earth element is Sc, Y, La, Ce or Yb.
The nickel-bass alloy material that is applicable to inert anode of metal fused-salt electrolysis cell of the present invention is characterized in that the component of this nickel-bass alloy material also comprises Si, and the quality proportioning of Si is the Si of 0.1%-1%.
The nickel-bass alloy material that is applicable to inert anode of metal fused-salt electrolysis cell of the present invention, the component that it is characterized in that this nickel-bass alloy material also comprises a kind of alloying element that is selected among Co, Cr, Mn, Zn, Ti, Sn, Zr, Nb, Ag, W, the Ta or two or more combinations, and the summation of its quality proportioning is 0-10%.
The preparation method who is applicable to the nickel-bass alloy material of inert anode of metal fused-salt electrolysis cell of the present invention adopts the preparation of alloy melting method and powder metallurgy process, is suitable for carrying out follow-up thermal treatment and viscous deformation, as rolling, extruding and forging etc.The preparation method of metal alloy the best carries out the Medium frequency induction melting in vacuum environment, direct pouring becomes work in-process, slightly forms the inert anode product after processing; Heat-treat and viscous deformation after perhaps being cast into ingot casting, as rolling, extruding, forging.This alloy material has good conductivity, and good switching performance, is suitable for brazing, mechanical connection and bonding etc.
It is raw material that alloy of the present invention can adopt master alloy or various metal, by mechanical stirring or induction stirring, obtains tiny and uniform grain structure at last and reduces the elemental composition segregation.This alloy has good high-temperature oxidation resistance under atmospheric environment He in the molten salt electrolyte, good electrochemically resistant is learned the anti-grain boundary corrosion performance of burn into, and the temperature fluctuation of electrolyzer is had good robust and interference free performance.
The nickel-bass alloy material that is applicable to inert anode of metal fused-salt electrolysis cell of the present invention; be applicable in low temperature (700-850 ℃) electrolyte system; anode is polarized in the surface by electrochemical in-situ and forms oxide compound and fluorochemical mixed protection layer; to prevent the further corrosion and the oxidation of anode interior, the holding anode inner base is the electrochemistry inertia.
The metal alloy that the embodiment of the invention provides is suitable in low temperature (700-850 ℃) electrolyte system, and its electrolyte ingredient is KF-NaF-AlF
3-Al
2O
3, its KF+NaF and AlF
3Mol ratio is between 1.2-1.7.Test shows, is 0.5A/cm in anodic current density
2The time, adopt alloy inert anode of the present invention can obtain foreign matter content and be less than 0.3% electrolysis primary aluminum, satisfy the requirement of commercial aluminium ingot.
The nickel-bass alloy material that is applicable to inert anode of metal fused-salt electrolysis cell of the present invention is applicable to low temperature (700-850 ℃) electrolyte system.Alloy anode shows good high-temperature oxidation-resistance and electrolyte-resistant corrosive nature in electrolytic process, the aluminium quality product after the electrolysis reaches more than 99.7%.
Embodiment
Be applicable to the nickel-bass alloy material of inert anode of metal fused-salt electrolysis cell, this nickel-bass alloy material comprises Cu, Al and Fe, and the quality proportioning of each component is Cu:5%-20%, Al:3%-15%, and Fe:15%-50%, surplus is Ni.The quality proportioning of this nickel-bass alloy material each component after further optimizing is: Cu:8%-15%, and Al:3%-8%, Fe:25%-45%, surplus is Ni.
In order to increase the adhesivity of oxide film in the electrolytic process, also need add the rare earth element of 0.05%-5% in the alloy material, as Sc, Y and lanthanides, as La, Ce, Yb etc.The adding of rare earth element, all right crystal grain thinning, the homogeneity of increase material microtexture.
In order to increase the flowability in the alloy material castingprocesses, strengthen the cavity filling ability of melt, also need add the Si of 0.1%-1% in the alloying constituent.
Also comprise a kind of alloying element that is selected among Co, Cr, Mn, Zn, Ti, Sn, Zr, Nb, Ag, W, the Ta or two or more combinations in the composition of its alloy material, the quality percentage composition of above-mentioned element is 0-10%.
The further feature of the metal alloy that the embodiment of the invention provides is done with the following Examples further to replenish and is described.
Embodiment 1
A kind of alloy material that is applicable to inert anode of metal fused-salt electrolysis cell, the mass component of alloy is: 15% iron, 12% aluminium, 5% copper remains and is nickel.Alloy is the melting casting in medium-frequency induction furnace, and ingot casting processing back forms the anode product.At KF-NaF-AlF
3-Al
2O
3In the system 20A electrolytic trial, electrolysis temperature is 900 ℃, and anodic current density is 0.5A/cm
2, average electrolysis voltage is about 4.6V, electrolysis can obtain quality in 24 hours and reach 99.8% primary aluminum.
Embodiment 2
A kind of alloy material that is applicable to inert anode of metal fused-salt electrolysis cell, the mass component of alloy is: 50% iron, 3% aluminium, 20% copper remains and is nickel.Alloy is melting casting in 1400-1600 ℃ of temperature range in medium-frequency induction furnace, and ingot casting processing back forms the anode product.At KF-NaF-AlF
3-Al
2O
3In the system 20A electrolytic trial, electrolysis temperature is 900 ℃, and anodic current density is 0.5A/cm
2, average electrolysis voltage is about 3.5V, electrolysis can obtain quality in 24 hours and reach primary aluminum more than 99.7%.
Embodiment 3
A kind of alloy material that is applicable to inert anode of metal fused-salt electrolysis cell, the mass component of alloy is: 20% iron, 12% aluminium, 12% copper, 0.05% lanthanum, 2% chromium, 0.1% silicon remains and is nickel.Alloy is melting in 1400-1600 ℃ of temperature range in vacuum induction furnace, again through water cooled mo(u)ld cooling casting.Ingot casting cuts into diameter after Overheating Treatment be that 25mm, thickness are the sequin of 3mm.Carry out the high-temperature oxidation resistant property testing at 850 ℃, oxidization time is 200 hours, and the result shows that the oxidation weight gain speed of this alloy is 0.007 mg/cm
2H.
Embodiment 4
A kind of alloy material that is applicable to inert anode of metal fused-salt electrolysis cell, the alloy mass composition is: 45% iron, 8% aluminium, 8% copper, 5.0% ytterbium, 0.6% tin, 0.1% silicon remains and is nickel.Alloy is melting in vacuum induction furnace, again through water cooled mo(u)ld cooling casting.At KF-NaF-AlF
3-Al
2O
3In the system 200A electrolytic trial, electrolysis temperature is 800 ℃, and anodic current density is 0.5A/cm
2, electrolysis voltage is in the fluctuation of 3.6-4.0 scope, and electrolysis shows after 300 hours that the oxide film adhesive ability of this alloy is strong, to the robust and the interference free performance excellence of temperature fluctuation.
Embodiment 5
A kind of alloy material that is applicable to inert anode of metal fused-salt electrolysis cell, the alloy mass composition is: 20% iron, 5% aluminium, 10% copper, 2.0% lanthanum, 1.0% yttrium, 0.5% silicon remains and is nickel.Alloy is melting in medium-frequency induction furnace, and ingot casting processing back forms the anode product.Alloy anode is polarized in the surface by electrochemical in-situ and forms oxide compound and fluorochemical mixed protection layer, at KF-NaF-AlF
3-Al
2O
3In the system 20A electrolytic trial, electrolysis temperature is 800 ℃, and anodic current density is 0.5A/cm
2, electrolysis voltage is in 4.2-4.5 scope fluctuation, and electrolysis can obtain quality in 24 hours and reach primary aluminum more than 99.9%.
Embodiment 6
A kind of alloy material that is applicable to inert anode of metal fused-salt electrolysis cell, the alloy mass composition is: 20% iron, 5% aluminium, 10% copper, 2.0% lanthanum, 1.0% yttrium, 0.5% silicon, 3.0% silver remains and is nickel.Alloy is processed into the anode product, and with embodiment 5 the same terms electrolysis the time, electrolysis voltage fluctuates in 3.9～4.1 scopes.
Embodiment 7
Adopt the identical electrolytic condition of embodiment 5, electrolysis finishes the back and takes out alloy anode, and the scanning electron microscope analysis electrolytic oxide film shows: the outer mixolimnion of oxide film for ferronickel oxide compound and fluorochemical, and this layer thickness is the 50-100 micron; Inferior skin is fine and close mixed oxide, and its main component is for being NiO, FeO
x, CuO
x, and the complexing product, thickness is the 10-20 micron; Near metallic matrix is the Al of one deck 3-5 micron thickness
2O
3Layer, this layer plays barrier effect to metallic element toward external diffusion.
Embodiment 8
The alloy of embodiment 1 to embodiment 6 adopts the powder metallurgy mode, obtains highdensity alloy through batch mixing, moulding, sintering and mechanical alloying, obtains having even tiny microstructure and dispersion-strengthened alloy material mutually after the thermal treatment.The alloy that this prepared obtains has the good high-temperature oxidation-resistance equally and electrochemically resistant is learned corrosive nature.
Embodiment 9
Embodiment 1 to embodiment 6 alloy adopts repeatedly thermal treatment and viscous deformation, as extruding, forging, rolling etc., obtains the tiny microtexture of crystal grain, reduces grain boundary corrosion, avoids spot corrosion.With respect to casting alloy, the high-temperature oxidation resistance of alloy and electrochemically resistant are learned the corrosive nature raising more than 20% after the distortion thermal treatment, and the primary aluminum foreign matter content reduces 10%-20%.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (6)
1. be applicable to the nickel-bass alloy material of inert anode of metal fused-salt electrolysis cell, it is characterized in that its nickel-bass alloy material comprises Cu, Al and Fe, the quality proportioning of each component is Cu:5%-20%, Al:3%-15%, and Fe:15%-50%, surplus is Ni.
2. the alloy material that is applicable to inert anode of metal fused-salt electrolysis cell according to claim 1 is characterized in that the component of this nickel-bass alloy material also comprises rare earth element, and the quality proportioning of rare earth element is 0.05%-5%.
3. the alloy material that is applicable to inert anode of metal fused-salt electrolysis cell according to claim 2 is characterized in that described rare earth element is Sc, Y, La, Ce or Yb.
4. the alloy material that is applicable to inert anode of metal fused-salt electrolysis cell according to claim 2 is characterized in that the component of this nickel-bass alloy material also comprises Si, and the quality proportioning of Si is the Si of 0.1%-1%.
5. according to the described alloy material that is applicable to inert anode of metal fused-salt electrolysis cell of claim 4, the component that it is characterized in that this nickel-bass alloy material also comprises a kind of alloying element that is selected among Co, Cr, Mn, Zn, Ti, Sn, Zr, Nb, Ag, W, the Ta or two or more combinations, and the summation of its quality proportioning is 0-10%.
6. according to the described alloy material that is applicable to inert anode of metal fused-salt electrolysis cell of claim 1, it is characterized in that the quality proportioning of this nickel-bass alloy material each component is: Cu:8%-15%, Al:3%-8%, Fe:25%-45%, surplus is Ni.
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