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WO2019152664A1 - Alliage d'aluminium résistant à la corrosion pour électrodes - Google Patents

Alliage d'aluminium résistant à la corrosion pour électrodes Download PDF

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Publication number
WO2019152664A1
WO2019152664A1 PCT/US2019/016077 US2019016077W WO2019152664A1 WO 2019152664 A1 WO2019152664 A1 WO 2019152664A1 US 2019016077 W US2019016077 W US 2019016077W WO 2019152664 A1 WO2019152664 A1 WO 2019152664A1
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WO
WIPO (PCT)
Prior art keywords
aluminum alloy
alloy body
vol
bearing particles
less
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2019/016077
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English (en)
Inventor
Hasso Weiland
Stephen F. Baumann
Eider A. SIMIELLI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Howmet Aerospace Inc
Original Assignee
Arconic Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arconic Inc filed Critical Arconic Inc
Publication of WO2019152664A1 publication Critical patent/WO2019152664A1/fr
Priority to US16/922,209 priority Critical patent/US20200332406A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
    • C25B11/055—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material
    • C25B11/057—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of a single element or compound
    • C25B11/061—Metal or alloy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8825—Methods for deposition of the catalytic active composition
    • H01M4/8853—Electrodeposition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present disclosure is directed towards aluminum electrode alloys with improved corrosion resistance.
  • Utilizing aluminum alloy compositions as an aluminum electrode (e.g., anode) alloy product in an electrochemical cell can be evaluated by quantifying and/or qualifying two phenomena: (1) the anodic reaction and (2) the corrosion reaction of the aluminum electrode alloy composition.
  • aluminum reacts with hydroxyl ions which results in the release of electrons, the primary and desirable product of an electrochemical cell.
  • the aluminum in the aluminum electrode (e.g., anode) product material is oxidized in the presence of water and as the oxygen in the water reacts with the aluminum, aluminum oxide is formed, generating hydrogen gas (e.g. a byproduct of the corrosion reaction of the aluminum anode alloy composition).
  • the extent of corrosion reaction i.e. the amount of hydrogen generated for an aluminum electrode alloy product used as an anode, is a function of electrolyte temperatures and current densities in the electrochemical cell. As operating temperatures and applied current vary for the operation of the cell, so too does the aluminum electrode alloy composition experience varying instances of high anodic reaction and high corrosion reaction windows within the operating parameters/ranges of the electrolytic cell.
  • the present disclosure is directed towards aluminum alloys with improved corrosion resistance when employed as an electrode in an electrochemical cell. More specifically, the present disclosure is directed towards iron-containing aluminum anode alloys having compositions including, for example, not greater than 0.06 wt. % Fe not greater than 5.0 wt. % Mg, and a corresponding heat treatment to configure the iron in solid solution, such that the resulting composition is configured with corrosion resistance when evaluated in accordance with hydrogen generation in an electrochemical half-cell test.
  • a method may include the step of (a) preparing an aluminum alloy body for solutionizing.
  • the aluminum alloy body may include not greater than 0.06 wt. % Fe, where at least some Fe is present.
  • the aluminum alloy body may include not greater than 5.0 wt. % Mg, with the balance being aluminum and unavoidable impurities.
  • the aluminum alloy product may include a first vol. % of Fe-bearing particles.
  • the method may include the step of (b) solutionizing the as-prepared aluminum alloy body.
  • the solutionizing step (b) may include dissolving at least some of the Fe-bearing particles into solid solution, thereby decreasing the first vol. % of Fe-bearing particles to a second vol. % of Fe-bearing particles in the as- solutionized aluminum alloy body.
  • the Fe-bearing particles may dissolve into a matrix of the aluminum alloy body.
  • the method may comprise quenching of the aluminum alloy body.
  • the solutionizing step may include solution heat treating and quenching, where the quenching may reduce the temperature of the aluminum alloy body at a rate of at least 38°C per second.
  • the temperature of the aluminum alloy body immediately before quenching is higher than the temperature of the aluminum alloy body during quenching.
  • the quenching may reduce the temperature of the aluminum alloy body at a rate of: at least 93 °C per second; or at least 204°C per second; or at least 427°C per second; or at least 87l°C per second or at least l760°C per second; or at least 3538°C per second; or at least 5538°C per second.
  • the quenching may be accomplished to bring the aluminum alloy body to a low temperature (e.g., due to a subsequent cold working step).
  • the quenching may comprise cooling the aluminum alloy body to a temperature of not greater than 93°C (i.e., the temperature of the aluminum alloy body upon completion of the quenching step is not greater than 93°C).
  • the quenching may comprise cooling the aluminum alloy body to a temperature of not greater than 65°C.
  • the quenching may comprise cooling the aluminum alloy body to a temperature of not greater than 38°C.
  • the quenching may comprise cooling the aluminum alloy body to ambient temperature.
  • the quenching may be accomplished via any suitable cooling medium.
  • the quenching may comprise contacting the aluminum alloy body with a gas.
  • the gas may be air.
  • the quenching may comprise contacting the aluminum alloy body with a liquid.
  • the liquid may be aqueous based, such as water or another aqueous based cooling solution.
  • the liquid may be an oil.
  • the oil may be hydrocarbon based.
  • the oil may be silicone based.
  • ambient air cooling may be used.
  • the aluminum alloy body may be suitable for use as an aluminum electrode alloy product.
  • the method may include determining, prior to the solutionizing step (b), conditions for the solutionizing step (b).
  • the conditions may include a soak temperature range of from 5l5°C to a Temperature2 (°C).
  • a value of Temperature2 may be dependent on an actual wt. % Mg of the aluminum alloy body.
  • Temperature2 644.6 - [l5.73*(actual wt. % Mg)].
  • the method may include completing the solutionizing step (b) according to the determining step.
  • the method may include selecting a value for a target temperature (°C) within the soak temperature range.
  • the conditions may include a soak time range of from Timel (hours) to Time2 (hours).
  • Timel 1.2141c10 8 * e A - (0.032516 * target temperature)
  • Time2 l.4467xl0 10 * e A - (0.032828 * target temperature).
  • the method may include determining, prior to the solutionizing step (b), conditions for the solutionizing step (b).
  • the conditions may include a soak temperature within 50°C and less than a solidus temperature of the as-prepared aluminum alloy body.
  • the method may include completing the solutionizing step (b) according to the determining step.
  • the determined conditions may include a soak temperature that may be: within 40°C and less than the solidus temperature of the as- prepared aluminum alloy body; or within 30°C and less than the solidus temperature of the as-prepared aluminum alloy body; or within 20°C and less than the solidus temperature of the as-prepared aluminum alloy body; or within lO°C and less than the solidus temperature of the as-prepared aluminum alloy body; or within 5°C and less than the solidus temperature of the as-prepared aluminum alloy body.
  • the second vol. % of Fe-bearing particles in the as-solutionized aluminum alloy body may be: at least 5% less than the first vol. % of Fe- bearing particles in the as-prepared aluminum alloy body; or at least 10% less than the first vol. % of Fe-bearing particles in the as-prepared aluminum alloy body; or at least 25% less than the first vol. % of Fe-bearing particles in the as-prepared aluminum alloy body; or at least 50% less than the first vol. % of Fe-bearing particles in the as-prepared aluminum alloy body; or at least 75% less than the first vol. % of Fe-bearing particles in the as-prepared aluminum alloy body; or at least 90% less than the first vol. % of Fe-bearing particles in the as-prepared aluminum alloy body.
  • the aluminum alloy body may include at least some Fe.
  • the Fe may be present in the aluminum alloy body only as an unavoidable impurity.
  • the Fe may be present in the aluminum alloy body as a purposefully added alloying element.
  • the aluminum alloy body may include 20 - 600 ppm Fe. In one embodiment of the method, the aluminum alloy body may include 20 - 400 ppm Fe.
  • the aluminum alloy body may include Fe in the amount of: at least 1 ppm; at least 5 ppm; at least 10 ppm; at least 20 ppm; at least 30 ppm; at least 40 ppm; at least 50 ppm; at least 70 ppm; at least 95 ppm; at least 100 ppm; at least 150 ppm; at least 182 ppm; at least 200 ppm; at least 250 ppm; at least 300 ppm; at least 350 ppm; at least 400 ppm; at least 450 ppm; at least 500 ppm; at least 550 ppm; or at least 600 ppm Fe.
  • the aluminum alloy body may include Fe in the amount of: not greater than 1 ppm; not greater than 5 ppm; not greater than 10 ppm; not greater than 20 ppm; not greater than 30 ppm; not greater than 40 ppm; not greater than 50 ppm; not greater than 70 ppm; not greater than 100 ppm; not greater than 150 ppm; not greater than 182 ppm; not greater than 200 ppm; not greater than 250 ppm; not greater than 300 ppm; not greater than 350 ppm; not greater than 400 ppm; not greater than 450 ppm; not greater than 500 ppm; not greater than 550 ppm; or not greater than 600 ppm Fe.
  • the aluminum alloy body may include at least some Mg.
  • the Mg may be present in the aluminum alloy body only as an unavoidable impurity.
  • the Mg may be present in the aluminum alloy body as a purposefully added alloying element.
  • the aluminum alloy body may include Mg in the amount of: at least 1 ppm; at least 5 ppm; at least 10 ppm; at least 25 ppm; at least 50 ppm; at least 100 ppm; at least 250 ppm; at least 500 ppm; at least 1000 pp; at least 5000 ppm; at least 10000 ppm; at least 15000 ppm; at least 20000 ppm; at least 24200 ppm; at least 24500 ppm; at least 25000 ppm; at least 25200 ppm; at least 25800 ppm; at least 30000 ppm; at least 35000 ppm; at least 40000 ppm; at least 45000 ppm; or at least 50000 ppm Mg.
  • the aluminum alloy body may include Mg in the amount of: not greater than 1 ppm; not greater than 5 ppm; not greater than 10 ppm; not greater than 25 ppm; not greater than 50 ppm; not greater than 100 ppm; not greater than 250 ppm; not greater than 500 ppm; not greater than 1000 ppm; not greater than 5000 ppm; not greater than 10000 ppm; not greater than 15000 ppm; not greater than 20000 ppm; not greater than 24200 ppm; not greater than 24500 ppm; not greater than 25000 ppm; not greater than 25200 ppm; not greater than 25800 ppm; not greater than 30000 ppm; not greater than 35000 ppm; not greater than 40000 ppm; not greater than 45000 ppm; or not greater than 50000 ppm Mg.
  • the aluminum alloy body may include one of a lxxx, 2xxx, 3xxx, 4xxx, 5xxx, 6xxx, 7xxx, and 8xxx aluminum alloy.
  • the aluminum alloy body may include an aluminum alloy selected from the group consisting of: a lxxx aluminum alloy, a 3xxx aluminum alloy, and a 5xxx aluminum alloy.
  • the aluminum alloy body may be a 5xxx aluminum alloy.
  • the aluminum alloy body may include an aluminum alloy having at least 90 wt. % Al.
  • a corrosion resistance of an as-solutionized aluminum electrode alloy product may be greater as compared to the corrosion resistance of a reference aluminum electrode alloy product (i.e., a“control” aluminum alloy body prepared in the same manner as the“sample” aluminum alloy body, but not solutionized according to one or more embodiments of the methods disclosed herein), when measured in accordance with an electrochemical cell test.
  • a reference aluminum electrode alloy product i.e., a“control” aluminum alloy body prepared in the same manner as the“sample” aluminum alloy body, but not solutionized according to one or more embodiments of the methods disclosed herein
  • the preparing step (a) may include working the aluminum alloy body into a sheet or plate.
  • the working may include at least one of hot rolling and cold rolling the aluminum alloy body.
  • the preparing step (a) may include forming a melt of an aluminum alloy.
  • the preparing step may include casting the melt to form the aluminum alloy body.
  • the casting step may include one of direct chill casting, continuous casting, and shape casting.
  • the preparing step (a) may include additively manufacturing the aluminum alloy body.
  • unavoidable impurities means the presence of an undesirable component.
  • an unavoidable impurity is present in a quantity or amount that is low enough to not change a desired property and/or characteristic (i.e. below a threshold to modify the corrosion resistance of the corrosion resistant aluminum electrode alloy and/or reduce the corrosion resistance below a certain margin of improvement when compared to the reference aluminum electrode alloy material evaluated in an electrochemical cell test).
  • “solutionize,”“solutionizing,”“solution heat treatment,” and the like means heating an aluminum alloy body to a suitable temperature, generally above the solvus temperature, holding at that temperature long enough to allow soluble elements to enter into solid solution, and cooling rapidly enough to hold the elements in solid solution.
  • the solid solution formed at high temperature may be retained in a supersaturated state by cooling with sufficient rapidity to restrict the precipitation of the solute atoms as coarse, incoherent particles.
  • Solidizing may include quenching of the aluminum alloy body, which quenching may be accomplished via a liquid (e.g., via an aqueous or organic solution), a gas (e.g., air cooling), or even a solid (e.g., cooled solids on one or more sides of the aluminum alloy body).
  • the quenching step may include contacting the aluminum alloy body with a liquid or a gas.
  • the quenching may occur in the absence of hot working and/or cold working of the aluminum alloy body.
  • the quenching may occur by immersion, spraying and/or jet drying, among other techniques, and in the absence of deformation of the aluminum alloy body.
  • wash temperature means the temperature or range of temperatures at which the aluminum alloy body is held during solution heat treatment.
  • “soak time” means the residence time or range of residence times for which the aluminum alloy body is held at the soak temperature during solution heat treatment.
  • reference aluminum electrode alloy means an iron- containing aluminum alloy in an aluminum alloy body prepared according to disclosed preparing step (a), but without being subject to the disclosed solutionizing step (b) of the method described herein.
  • reference aluminum electrode alloy product means an aluminum electrode (e.g., anode) alloy product formed from the reference aluminum electrode alloy.
  • Figure 1 is a schematic view of an example of an electrochemical cell that is configured for use in evaluating the corrosion of electrodes in an electrolyte in accordance with the present disclosure.
  • Figure 2 is a graph showing hydrogen gas generation and vol. % of Fe-bearing particles for solutionized and non-solutionized alloys for four different alloy compositions.
  • Aluminum alloys 1-4 having the compositions shown in Table 1, below, were cast as ingots and rolled to the desired thickness.
  • the reference and sample disks were tested for corrosion resistance (hydrogen generation) via an electrochemical cell system (schematically depicted in Figure 1).
  • the electrochemical cell consists of a counter electrode and an aluminum electrode (the reference or sample) alloy product submerged in an aqueous electrolyte.
  • the electrochemical cell is equipped with a mass-flow meter for measuring hydrogen gas (i.e., Fh) evolved from the aluminum electrode alloy product. Current is applied on the aluminum electrode alloy product, and flows through the electrolyte and into the counter electrode.
  • hydrogen gas i.e., Fh
  • sample disks (i.e. solutionized) from Alloys 2, 3 and 4 generated less hydrogen (11.3, 14.4, and 53.2 cc/cm 2 , respectively) than reference disks (i.e. non-solutionized) with the same composition (54.2, 75.5 and 115.1 cc/cm 2 , respectively). Both sample and reference disks from Alloy 1 produced the same amount of hydrogen.
  • higher amounts of undissolved impurities, such as iron, in an aluminum electrode alloy may result in an increased hydrogen generation (when compared to an aluminum electrode alloy having a lower amount of undissolved impurities).
  • at least some of the iron may be dissolved into solid solution, which is believed to improve the corrosion resistance (e.g. generate a lower amount of hydrogen when evaluated in an electrochemical half-cell test as set out in Example 2).
  • the aluminum electrode alloys of the present disclosure are configured with up to 5.0 wt.
  • Step 1 Preparation for Scanning Electron Microscope (SEM) Imaging
  • the average matrix grey level and standard deviation were calculated for each SEM image.
  • the average atomic number of the secondary phase particles of interest is higher than the matrix (the aluminum matrix), so the secondary phase particles appeared lighter in the image representations.
  • the pixels that make up the particles were defined as any pixel that had a grey level higher than (>) the average matrix grey level plus 3.5 standard deviations. This critical grey level was defined as the threshold.
  • a binary image was created by discriminating the grey level image to make all pixels higher than the threshold to be white (255) and all pixels at or lower than the threshold to be black (0).
  • Step 5 Calculation of Volume Percent of Fe-Bearing Particles:
  • sample disks from Alloys 1-4 all had a lower vol. % of Fe- particles (0.00014, 0.00003, 0.00000, and 0.01022 vol. %, respectively) as compared to reference disks of Alloys 1-4 (0.0046, 0.01115, 0.02335, and 0.04401 vol. %, respectively).
  • higher amounts of undissolved iron in an aluminum alloy body may result in increased vol. % of Fe-bearing particles (when compared to an aluminum alloy body having a lower amount of undissolved iron).
  • vol. % of Fe-bearing particles when compared to an aluminum alloy body having a lower amount of undissolved iron.
  • at least some of the iron may be dissolved into solid solution, which is believed to reduce the vol. % of Fe-bearing particles and thereby improve the corrosion resistance, as described above in Example 2.
  • a method comprising the steps of (a) preparing an aluminum alloy body for solutionizing, wherein the aluminum alloy body comprises: (i) not greater than 0.06 wt. % Fe, wherein at least some Fe is present; (ii) not greater than 5.0 wt. % Mg; (iii) the balance aluminum and unavoidable impurities; and (iv) a first vol. % of Fe- bearing particles; and (b) solutionizing the as-prepared aluminum alloy body, wherein the solutionizing step (b) comprises dissolving at least some of the Fe-bearing particles into solid solution, thereby decreasing the first vol. % of Fe-bearing particles to a second vol. % of Fe-bearing particles in the as-solutionized aluminum alloy body.
  • the method comprises determining, prior to the solutionizing step (b), conditions for the solutionizing step (b), wherein: (i) the conditions include a soak temperature within 50°C and less than a solidus temperature of the as-prepared aluminum alloy body; and wherein the method comprises completing the solutionizing step (b) according to the determining step.
  • the soak temperature is within 40°C and less than the solidus temperature of the as-prepared aluminum alloy body.
  • the soak temperature is within 30°C and less than the solidus temperature of the as-prepared aluminum alloy body.
  • the soak temperature is within 20°C and less than the solidus temperature of the as-prepared aluminum alloy body.
  • the soak temperature is within l0°C and less than the solidus temperature of the as-prepared aluminum alloy body.
  • the soak temperature is within 5°C and less than the solidus temperature of the as-prepared aluminum alloy body.
  • the second vol. % of Fe-bearing particles in the as-solutionized aluminum alloy body is at least 50% less than the first vol. % of Fe-bearing particles in the as-prepared aluminum alloy body.
  • the second vol. % of Fe-bearing particles in the as-solutionized aluminum alloy body is at least 75% less than the first vol. % of Fe-bearing particles in the as-prepared aluminum alloy body.
  • the aluminum alloy body comprises 20 - 400 ppm Fe.
  • the aluminum alloy body comprises not greater than 3 wt. % Mg.
  • the aluminum alloy body comprises at least some Mg.
  • the aluminum alloy body comprises one of a lxxx, 2xxx, 3xxx, 4xxx, 5xxx, 6xxx, 7xxx, and 8xxx aluminum alloy.
  • the aluminum alloy body comprises an aluminum alloy selected from the group consisting of: a lxxx aluminum alloy, a 3xxx aluminum alloy, and a 5xxx aluminum alloy.
  • the aluminum alloy body comprises an aluminum alloy comprising at least 90 wt. % Al.
  • the preparing step (a) comprises working the aluminum alloy body into a sheet or plate, the working comprising at least one of hot rolling and cold rolling the aluminum alloy body.
  • the preparing step (a) comprises: forming a melt of an aluminum alloy; and casting the melt to form the aluminum alloy body, wherein the casting step comprises one of: (i) direct chill casting; (ii) continuous casting; and (iii) shape casting.
  • the preparing step (a) comprises additively manufacturing the aluminum alloy body.

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Abstract

L'invention concerne un procédé qui comprend l'étape de préparation d'un corps en alliage d'aluminium pour une mise en solution. Le corps en alliage d'aluminium peut comprendre au plus 0,06 % en poids de Fe, où au moins un peu de Fe est présent. Le corps en aluminium peut comprendre au plus 5,0 % en poids de Mg. Le reste du corps en alliage d'aluminium peut être constitué d'aluminium et d'impuretés inévitables. Le corps en alliage d'aluminium peut comprendre un premier % en vol. de particules porteuses de Fe. Le procédé peut comprendre la mise en solution du corps en alliage d'aluminium ainsi préparé. L'étape de mise en solution peut comprendre la dissolution d'au moins une partie des particules porteuses de Fe dans une solution solide, ce qui réduit le premier % en vol. de particules porteuses de Fe à un second % en vol. de particules porteuses de Fe dans le corps en alliage d'aluminium mis en solution.
PCT/US2019/016077 2018-01-31 2019-01-31 Alliage d'aluminium résistant à la corrosion pour électrodes Ceased WO2019152664A1 (fr)

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US201862624317P 2018-01-31 2018-01-31
US62/624,317 2018-01-31

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987000206A1 (fr) * 1985-07-08 1987-01-15 Allied Corporation Alliages en aluminium ductiles, de faible densite et de resistan ce elevee et procede de fabrication
JPH08281448A (ja) * 1995-04-06 1996-10-29 Furukawa Electric Co Ltd:The Ａｌ−Ｍｇ系合金の抵抗スポット溶接方法
JP2001329329A (ja) * 2000-03-15 2001-11-27 Ykk Corp 高延性・耐摩耗性アルミニウム合金
US20110132504A1 (en) * 2004-04-05 2011-06-09 Nippon Light Metal Company, Ltd. Aluminum Alloy Casting Material for Heat Treatment Excelling in Heat Conduction and Process for Producing the Same
WO2015112450A1 (fr) * 2014-01-21 2015-07-30 Alcoa Inc. Alliages d'aluminium 6xxx

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987000206A1 (fr) * 1985-07-08 1987-01-15 Allied Corporation Alliages en aluminium ductiles, de faible densite et de resistan ce elevee et procede de fabrication
JPH08281448A (ja) * 1995-04-06 1996-10-29 Furukawa Electric Co Ltd:The Ａｌ−Ｍｇ系合金の抵抗スポット溶接方法
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