WO2022134573A1 - Corrosion-resistant aluminum alloy sacrificial anode and method for preparation thereof - Google Patents

Corrosion-resistant aluminum alloy sacrificial anode and method for preparation thereof Download PDF

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WO2022134573A1
WO2022134573A1 PCT/CN2021/108713 CN2021108713W WO2022134573A1 WO 2022134573 A1 WO2022134573 A1 WO 2022134573A1 CN 2021108713 W CN2021108713 W CN 2021108713W WO 2022134573 A1 WO2022134573 A1 WO 2022134573A1
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aluminum
aluminum alloy
sacrificial anode
mass percentage
corrosion
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PCT/CN2021/108713
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French (fr)
Chinese (zh)
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逯彦伟
刘光洲
陈士强
刘菲菲
唐彪
江玉仁
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山东德瑞防腐材料有限公司
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    • 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
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent
    • 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
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/12—Electrodes characterised by the material
    • C23F13/14—Material for sacrificial anodes

Definitions

  • the invention relates to the technical field of sacrificial anodes, in particular to a corrosion-resistant aluminum alloy sacrificial anode and a preparation method thereof.
  • the disclosed aluminum alloy sacrificial anode has little research on corrosion resistance.
  • the present invention provides a corrosion-resistant aluminum alloy sacrificial anode and a preparation method thereof.
  • a corrosion-resistant aluminum alloy sacrificial anode is composed of aluminum, zinc, manganese, strontium, nickel, tin and lanthanum; the mass percentage of zinc is 5-8%; the mass percentage of manganese is 0.1-0.3%; The mass percentage of the strontium is 0.1-0.18%; the mass percentage of the nickel is 0.2-0.5%; the mass percentage of the tin is 0.15-0.22%; the mass percentage of the lanthanum is 0.02-0.05%; Aluminium and inevitable impurities.
  • the total content of impurities is less than 0.10%.
  • the impurity vanadium is less than or equal to 0.05%, and the impurity copper is less than or equal to 0.01%.
  • the preparation method of the corrosion-resistant aluminum alloy sacrificial anode comprises the following steps:
  • the smelting conditions are as follows: the smelting temperature is 750-780° C., the smelting time is 10-15 minutes, after the aluminum ingot is completely melted, stirring for 2-3 minutes, and then The temperature is lowered to 650-670°C at a rate of 2-3°C/min to obtain molten aluminum; during the smelting process, nitrogen is continuously introduced for protection.
  • the aluminum alloy particles are passed through an 80-mesh sieve, and the material under the sieve is taken; the material above the sieve is added to the aluminum liquid for reprocessing.
  • the purity of the zinc, aluminum, manganese, strontium, nickel, tin and lanthanum is higher than 99.9%.
  • the aluminum alloy sacrificial anode has a current efficiency higher than 93%, an open circuit potential of -1.17 to -1.21V, and a capacitance of ⁇ 1200A ⁇ h/kg.
  • the corrosion-resistant aluminum alloy sacrificial anode of the present invention is composed of aluminum, zinc, manganese, strontium, nickel, tin and lanthanum; the mass percentage of the zinc is 5-8%; The mass percentage of the strontium is 0.1-0.3%; the mass percentage of the strontium is 0.1-0.18%; the mass percentage of the nickel is 0.2-0.5%; the mass percentage of the tin is 0.15-0.22%; the mass percentage of the lanthanum It is 0.02 to 0.05%; the balance is aluminum and inevitable impurities.
  • the present invention strictly limits the content of metal element vanadium in impurities, which can effectively improve various electrochemical properties of the sacrificial anode.
  • the potential is -1.17 ⁇ -1.21V, the capacitance is ⁇ 1200A ⁇ h/kg, and the application prospect is wide.
  • a corrosion-resistant aluminum alloy sacrificial anode is composed of aluminum, zinc, manganese, strontium, nickel, tin and lanthanum; the mass percentage of the zinc is 7.5%; the mass percentage of the manganese is 0.2%; the mass percentage of the strontium The percentage is 0.15%; the mass percentage of nickel is 0.4%; the mass percentage of tin is 0.18%; the mass percentage of lanthanum is 0.03%; the balance is aluminum and inevitable impurities.
  • the impurity vanadium content is 0.03%
  • the impurity copper is less than 0.01%
  • the total amount of impurities is 0.10%.
  • the preparation method of the corrosion-resistant aluminum alloy sacrificial anode comprises the following steps:
  • the smelting conditions are as follows: the smelting temperature is 760°C, the smelting time is 12min, after the aluminum ingot is completely melted, stirring for 2.5min, and then cooling at a speed of 2.5°C/min To 660 °C, the molten aluminum is obtained; in the smelting process, nitrogen is continuously introduced for protection.
  • the aluminum alloy particles are passed through an 80-mesh sieve, and the material under the sieve is taken; the material above the sieve is added to the aluminum liquid for reprocessing.
  • the purity of the zinc, aluminum, manganese, strontium, nickel, tin and lanthanum are all higher than 99.9%.
  • a corrosion-resistant aluminum alloy sacrificial anode is composed of aluminum, zinc, manganese, strontium, nickel, tin and lanthanum; the mass percentage of the zinc is 8%; the mass percentage of the manganese is 0.1%; the mass percentage of the strontium The percentage is 0.18%; the mass percentage of nickel is 0.2%; the mass percentage of tin is 0.22%; the mass percentage of lanthanum is 0.02%; the balance is aluminum and inevitable impurities.
  • the impurity vanadium content is 0.04%
  • the impurity copper is less than 0.01%
  • the total amount of impurities is 0.12%.
  • the preparation method of the corrosion-resistant aluminum alloy sacrificial anode comprises the following steps:
  • the smelting conditions are as follows: the smelting temperature is 750°C, the smelting time is 15min, after the aluminum ingot is completely melted, stir for 2min, and then cool down to 3°C/min. 650 ° C to obtain molten aluminum; during the smelting process, nitrogen was continuously introduced for protection.
  • the aluminum alloy particles are passed through an 80-mesh sieve, and the material under the sieve is taken; the material above the sieve is added to the aluminum liquid for reprocessing.
  • the purity of the zinc, aluminum, manganese, strontium, nickel, tin and lanthanum are all higher than 99.9%.
  • a corrosion-resistant aluminum alloy sacrificial anode is composed of aluminum, zinc, manganese, strontium, nickel, tin and lanthanum; the mass percentage of the zinc is 5%; the mass percentage of the manganese is 0.3%; the mass percentage of the strontium The percentage is 0.10%; the mass percentage of nickel is 0.5%; the mass percentage of tin is 0.15%; the mass percentage of lanthanum is 0.05%; the balance is aluminum and inevitable impurities.
  • the impurity content of vanadium is 0.03%
  • the impurity copper is less than 0.01%
  • the total amount of impurities is 0.09%.
  • the preparation method of the corrosion-resistant aluminum alloy sacrificial anode comprises the following steps:
  • the smelting conditions are as follows: the smelting temperature is 780°C, the smelting time is 10min, after the aluminum ingot is completely melted, stir for 3min, and then cool down to 2°C/min. At 670°C, molten aluminum was obtained; during the smelting process, nitrogen was continuously introduced for protection.
  • the aluminum alloy particles are passed through an 80-mesh sieve, and the material under the sieve is taken; the material above the sieve is added to the aluminum liquid for reprocessing.
  • the purity of the zinc, aluminum, manganese, strontium, nickel, tin and lanthanum are all higher than 99.9%.
  • Example 1 The strontium element in Example 1 was removed, and the remaining proportions and preparation methods remained unchanged.
  • Example 1 The content of vanadium element in Example 1 was increased to 0.07%, the remaining proportions and preparation methods remained unchanged, and the total content of impurities remained unchanged.
  • Example 2 The two steps of spray granulation and organic solvent ultrasonic cleaning in Example 1 were removed, and the remaining proportions and preparation methods remained unchanged, and the total content of impurities remained unchanged.
  • the electrochemical performance test method refers to the constant current experimental method in GB/T 17848-1999, and the electrochemical performance of the aluminum alloy sacrificial anodes prepared in Examples 1-3 and Comparative Examples 1-3 is tested under normal temperature conditions. And solution test, the specific test data are shown in Table 1.
  • Test medium artificial seawater, and the test temperature is normal temperature.
  • the aluminum alloy sacrificial anode of Example 1-3 of the present invention not only has good wear resistance, but also has a current efficiency higher than 93%, an open circuit potential of -1.17 to -1.21V, and a capacitance of ⁇ 1200A ⁇ h/ kg, has wide application prospects.

Abstract

Disclosed is a corrosion-resistant aluminum alloy sacrificial anode, consisting of aluminum, zinc, manganese, strontium, nickel, tin, and lanthanum; the mass percentage of said zinc is 5–8%; the mass percentage of said manganese is 0.1–0.3%; the mass percentage of said strontium is 0.1–0.3%; the mass percentage of said nickel is 0.2–0.5%; the mass percentage of said tin is 0.15–0.22%; the mass percentage of said lanthanum is 0.02–0.05%; the remainder is aluminum and inevitable impurities. The present invention strictly defines the content of the metallic element vanadium in the impurities, and can effectively improve the electrochemical performance of the sacrificial anode; the aluminum alloy sacrificial anode prepared by the present invention has good wear resistance and a current efficiency higher than 93%, an open circuit potential of -1.17 to -1.21 V, and a capacity of ≥1200 A-h/kg, and has broad prospects for application.

Description

一种耐腐蚀铝合金牺牲阳极及其制备方法A kind of corrosion-resistant aluminum alloy sacrificial anode and preparation method thereof 技术领域technical field
本发明涉及牺牲阳极技术领域，尤其涉及一种耐腐蚀铝合金牺牲阳极及其制备方法。The invention relates to the technical field of sacrificial anodes, in particular to a corrosion-resistant aluminum alloy sacrificial anode and a preparation method thereof.
背景技术Background technique
金属防蚀中的阴极保护法有两种，其一为外加电流法，其二为牺牲阳极法。根据电流的来源不同分为外加电流阴极保护和牺牲阳极保护两种方法。外加电流保护是依靠外加电源来提供电流，实现阴极保护；后者是将被保护金属与电位更负的金属相连，构成回路，电位更负的金属溶解提供阴极保护的电流。在保护过程中，电位更负的金属作为阳极不断溶解，故称为牺牲阳极保护。与外加电流保护相比，不需要任何外部电源、不会干扰临近设施、设备简单、施工方便、无需经常维护等优点，目前在工程上广泛使用。There are two cathodic protection methods in metal corrosion protection, one is the impressed current method, and the other is the sacrificial anode method. According to the source of the current, it is divided into two methods: impressed current cathodic protection and sacrificial anode protection. Impressed current protection relies on an external power supply to provide current to achieve cathodic protection; the latter is to connect the protected metal with a metal with a more negative potential to form a loop, and the metal with a more negative potential dissolves to provide current for cathodic protection. In the protection process, the metal with more negative potential is continuously dissolved as the anode, so it is called sacrificial anode protection. Compared with the impressed current protection, it does not need any external power supply, does not interfere with adjacent facilities, has the advantages of simple equipment, convenient construction, and no need for frequent maintenance. It is currently widely used in engineering.
目前已经公开的铝合金牺牲阳极，对耐腐蚀性能的研究较少，为了拓展铝合金牺牲阳极的应用范围，有必要研究一种耐腐蚀铝合金牺牲阳极及其制备方法。At present, the disclosed aluminum alloy sacrificial anode has little research on corrosion resistance. In order to expand the application range of aluminum alloy sacrificial anode, it is necessary to study a corrosion-resistant aluminum alloy sacrificial anode and its preparation method.
发明内容SUMMARY OF THE INVENTION
基于背景技术存在的技术问题，本发明提出了一种耐腐蚀铝合金牺牲阳极及其制备方法。Based on the technical problems existing in the background art, the present invention provides a corrosion-resistant aluminum alloy sacrificial anode and a preparation method thereof.
本发明的技术方案如下：The technical scheme of the present invention is as follows:
一种耐腐蚀铝合金牺牲阳极，由铝、锌、锰、锶、镍、锡和镧组成；所述锌的质量百分比为5～8％；所述锰的质量百分比为0.1～0.3％；所述锶的质量百分比为0.1～0.18％；所述镍的质量百分比为0.2～0.5％；所述锡的质量百分比为 0.15～0.22％；所述镧的质量百分比为0.02～0.05％；余量为铝和不可避免的杂质。A corrosion-resistant aluminum alloy sacrificial anode is composed of aluminum, zinc, manganese, strontium, nickel, tin and lanthanum; the mass percentage of zinc is 5-8%; the mass percentage of manganese is 0.1-0.3%; The mass percentage of the strontium is 0.1-0.18%; the mass percentage of the nickel is 0.2-0.5%; the mass percentage of the tin is 0.15-0.22%; the mass percentage of the lanthanum is 0.02-0.05%; Aluminium and inevitable impurities.
优选的，所述的耐腐蚀铝合金牺牲阳极，杂质的总含量低于0.10％。Preferably, in the corrosion-resistant aluminum alloy sacrificial anode, the total content of impurities is less than 0.10%.
优选的，所述的耐腐蚀铝合金牺牲阳极，杂质钒≤0.05％，杂质铜≤0.01％。Preferably, in the corrosion-resistant aluminum alloy sacrificial anode, the impurity vanadium is less than or equal to 0.05%, and the impurity copper is less than or equal to 0.01%.
所述的耐腐蚀铝合金牺牲阳极的制备方法，包括以下步骤：The preparation method of the corrosion-resistant aluminum alloy sacrificial anode comprises the following steps:
(1)熔炼：将铝锭进行熔炼，得铝液，在熔炼过程中持续通入惰性气体进行保护；(1) Smelting: the aluminum ingot is smelted to obtain molten aluminum, and the inert gas is continuously introduced into the smelting process for protection;
(2)喷淋造粒：铝液保温30～35min后，将铝液的温度升高至850-900℃，保温5～8min，后喷淋造粒，得到铝合金颗粒；(2) Spray granulation: after the molten aluminum is kept warm for 30-35 minutes, the temperature of the molten aluminum is raised to 850-900°C, kept for 5-8 minutes, and then sprayed and granulated to obtain aluminum alloy particles;
(3)混合：铝合金颗粒置于丙酮中，加入乙醇，350-450kHz超声清洗1-3min，再将其置于熔炼炉中加热熔炼成液态铝，并控制液态铝在温度为720-750℃，保温10～15min，在铝液中加入锌，熔化、搅拌均匀后，加入用铝箔包裹的锰、锶、镍、锡和镧，至完全熔化，搅匀后扒渣，保温3～3.5h，得到混合液；(3) Mixing: The aluminum alloy particles are placed in acetone, added with ethanol, ultrasonically cleaned at 350-450kHz for 1-3min, and then placed in a melting furnace to heat and smelt into liquid aluminum, and the temperature of the liquid aluminum is controlled to be 720-750 ℃ , heat preservation for 10 to 15 minutes, add zinc to the molten aluminum, melt and stir evenly, add manganese, strontium, nickel, tin and lanthanum wrapped with aluminum foil until it is completely melted, stir evenly, remove slag, and keep warm for 3 to 3.5 hours. get the mixture;
(4)浇注成型：混合液在模具中700～710℃浇注成型，并冷却至室温，即可。(4) Pouring molding: the mixed solution is poured and molded in the mold at 700-710 °C, and cooled to room temperature.
优选的，所述的步骤(1)中，所述的熔炼条件具体为：熔炼温度为750～780℃，熔炼时间为10～15min，待所述铝锭完全熔化后，搅拌2～3min，然后以2～3℃/min的速度降温至650～670℃，得到铝液；在熔炼过程中持续通入氮气进行保护。Preferably, in the step (1), the smelting conditions are as follows: the smelting temperature is 750-780° C., the smelting time is 10-15 minutes, after the aluminum ingot is completely melted, stirring for 2-3 minutes, and then The temperature is lowered to 650-670°C at a rate of 2-3°C/min to obtain molten aluminum; during the smelting process, nitrogen is continuously introduced for protection.
优选的。所述的步骤(2)中，所述的铝合金颗粒过80目筛，取筛下物；筛上物加入铝液中重新处理。preferred. In the step (2), the aluminum alloy particles are passed through an 80-mesh sieve, and the material under the sieve is taken; the material above the sieve is added to the aluminum liquid for reprocessing.
优选的，所述的步骤(3)中，所述的锌、铝、锰、锶、镍、锡和镧的纯度均高于99.9％。Preferably, in the step (3), the purity of the zinc, aluminum, manganese, strontium, nickel, tin and lanthanum is higher than 99.9%.
优选的，所述的铝合金牺牲阳极，电流效率高于93％，开路电位为-1.17～-1.21V，电容量≥1200A·h/kg。Preferably, the aluminum alloy sacrificial anode has a current efficiency higher than 93%, an open circuit potential of -1.17 to -1.21V, and a capacitance of ≥1200A·h/kg.
本发明的有益之处在于：本发明的耐腐蚀铝合金牺牲阳极，由铝、锌、锰、 锶、镍、锡和镧组成；所述锌的质量百分比为5～8％；所述锰的质量百分比为0.1～0.3％；所述锶的质量百分比为0.1～0.18％；所述镍的质量百分比为0.2～0.5％；所述锡的质量百分比为0.15～0.22％；所述镧的质量百分比为0.02～0.05％；余量为铝和不可避免的杂质。本发明中严格限定了杂质中金属元素钒的含量，可以有效提升牺牲阳极的各项电化学性能；本发明制备的铝合金牺牲阳极，不但耐磨性能好，而且电流效率高于93％，开路电位为-1.17～-1.21V，电容量≥1200A·h/kg，应用前景广泛。The advantages of the present invention are: the corrosion-resistant aluminum alloy sacrificial anode of the present invention is composed of aluminum, zinc, manganese, strontium, nickel, tin and lanthanum; the mass percentage of the zinc is 5-8%; The mass percentage of the strontium is 0.1-0.3%; the mass percentage of the strontium is 0.1-0.18%; the mass percentage of the nickel is 0.2-0.5%; the mass percentage of the tin is 0.15-0.22%; the mass percentage of the lanthanum It is 0.02 to 0.05%; the balance is aluminum and inevitable impurities. The present invention strictly limits the content of metal element vanadium in impurities, which can effectively improve various electrochemical properties of the sacrificial anode. The potential is -1.17～-1.21V, the capacitance is ≥1200A·h/kg, and the application prospect is wide.
具体实施方式Detailed ways
实施例1Example 1
一种耐腐蚀铝合金牺牲阳极，由铝、锌、锰、锶、镍、锡和镧组成；所述锌的质量百分比为7.5％；所述锰的质量百分比为0.2％；所述锶的质量百分比为0.15％；所述镍的质量百分比为0.4％；所述锡的质量百分比为0.18％；所述镧的质量百分比为0.03％；余量为铝和不可避免的杂质。A corrosion-resistant aluminum alloy sacrificial anode is composed of aluminum, zinc, manganese, strontium, nickel, tin and lanthanum; the mass percentage of the zinc is 7.5%; the mass percentage of the manganese is 0.2%; the mass percentage of the strontium The percentage is 0.15%; the mass percentage of nickel is 0.4%; the mass percentage of tin is 0.18%; the mass percentage of lanthanum is 0.03%; the balance is aluminum and inevitable impurities.
所述的耐腐蚀铝合金牺牲阳极，杂质钒含量为0.03％，杂质铜<0.01％，杂质的总量为0.10％。In the corrosion-resistant aluminum alloy sacrificial anode, the impurity vanadium content is 0.03%, the impurity copper is less than 0.01%, and the total amount of impurities is 0.10%.
所述的耐腐蚀铝合金牺牲阳极的制备方法，包括以下步骤：The preparation method of the corrosion-resistant aluminum alloy sacrificial anode comprises the following steps:
(1)熔炼：将铝锭进行熔炼，得铝液，在熔炼过程中持续通入惰性气体进行保护；(1) Smelting: the aluminum ingot is smelted to obtain molten aluminum, and the inert gas is continuously introduced into the smelting process for protection;
(2)喷淋造粒：铝液保温32min后，将铝液的温度升高至880℃，保温6min，后喷淋造粒，得到铝合金颗粒；(2) Spray granulation: after the molten aluminum is kept warm for 32 minutes, the temperature of the molten aluminum is raised to 880° C., maintained for 6 minutes, and then sprayed and granulated to obtain aluminum alloy particles;
(3)混合：铝合金颗粒置于丙酮中，加入乙醇，380kHz超声清洗1.5min，再将其置于熔炼炉中加热熔炼成液态铝，并控制液态铝在温度为730℃，保温12min，在铝液中加入锌，熔化、搅拌均匀后，加入用铝箔包裹的锰、锶、镍、 锡和镧，至完全熔化，搅匀后扒渣，保温3.2h，得到混合液；(3) Mixing: The aluminum alloy particles were placed in acetone, ethanol was added, ultrasonically cleaned at 380 kHz for 1.5 min, and then placed in a smelting furnace to heat and smelt into liquid aluminum, and the temperature of the liquid aluminum was controlled to be 730 ° C, and the temperature was kept for 12 min. Add zinc to the molten aluminum, melt and stir evenly, add manganese, strontium, nickel, tin and lanthanum wrapped with aluminum foil to complete melting, stir evenly, remove slag, and keep the temperature for 3.2 hours to obtain a mixed solution;
(4)浇注成型：混合液在模具中705℃浇注成型，并冷却至室温，即可。(4) Pouring molding: the mixed solution is poured and molded in a mold at 705°C, and cooled to room temperature.
所述的步骤(1)中，所述的熔炼条件具体为：熔炼温度为760℃，熔炼时间为12min，待所述铝锭完全熔化后，搅拌2.5min，然后以2.5℃/min的速度降温至660℃，得到铝液；在熔炼过程中持续通入氮气进行保护。In the step (1), the smelting conditions are as follows: the smelting temperature is 760°C, the smelting time is 12min, after the aluminum ingot is completely melted, stirring for 2.5min, and then cooling at a speed of 2.5°C/min To 660 ℃, the molten aluminum is obtained; in the smelting process, nitrogen is continuously introduced for protection.
所述的步骤(2)中，所述的铝合金颗粒过80目筛，取筛下物；筛上物加入铝液中重新处理。In the step (2), the aluminum alloy particles are passed through an 80-mesh sieve, and the material under the sieve is taken; the material above the sieve is added to the aluminum liquid for reprocessing.
所述的步骤(3)中，所述的锌、铝、锰、锶、镍、锡和镧的纯度均高于99.9％。In the step (3), the purity of the zinc, aluminum, manganese, strontium, nickel, tin and lanthanum are all higher than 99.9%.
实施例2Example 2
一种耐腐蚀铝合金牺牲阳极，由铝、锌、锰、锶、镍、锡和镧组成；所述锌的质量百分比为8％；所述锰的质量百分比为0.1％；所述锶的质量百分比为0.18％；所述镍的质量百分比为0.2％；所述锡的质量百分比为0.22％；所述镧的质量百分比为0.02％；余量为铝和不可避免的杂质。A corrosion-resistant aluminum alloy sacrificial anode is composed of aluminum, zinc, manganese, strontium, nickel, tin and lanthanum; the mass percentage of the zinc is 8%; the mass percentage of the manganese is 0.1%; the mass percentage of the strontium The percentage is 0.18%; the mass percentage of nickel is 0.2%; the mass percentage of tin is 0.22%; the mass percentage of lanthanum is 0.02%; the balance is aluminum and inevitable impurities.
所述的耐腐蚀铝合金牺牲阳极，杂质钒含量为0.04％，杂质铜<0.01％，杂质的总量为0.12％。In the corrosion-resistant aluminum alloy sacrificial anode, the impurity vanadium content is 0.04%, the impurity copper is less than 0.01%, and the total amount of impurities is 0.12%.
所述的耐腐蚀铝合金牺牲阳极的制备方法，包括以下步骤：The preparation method of the corrosion-resistant aluminum alloy sacrificial anode comprises the following steps:
(1)熔炼：将铝锭进行熔炼，得铝液，在熔炼过程中持续通入惰性气体进行保护；(1) Smelting: the aluminum ingot is smelted to obtain molten aluminum, and the inert gas is continuously introduced into the smelting process for protection;
(2)喷淋造粒：铝液保温35min后，将铝液的温度升高至850℃，保温8min，后喷淋造粒，得到铝合金颗粒；(2) Spray granulation: after the molten aluminum is kept warm for 35 minutes, the temperature of the molten aluminum is raised to 850° C., maintained for 8 minutes, and then sprayed and granulated to obtain aluminum alloy particles;
(3)混合：铝合金颗粒置于丙酮中，加入乙醇，350kHz超声清洗3min，再将其置于熔炼炉中加热熔炼成液态铝，并控制液态铝在温度为720℃，保温 15min，在铝液中加入锌，熔化、搅拌均匀后，加入用铝箔包裹的锰、锶、镍、锡和镧，至完全熔化，搅匀后扒渣，保温3h，得到混合液；(3) Mixing: The aluminum alloy particles are placed in acetone, added with ethanol, ultrasonically cleaned at 350 kHz for 3 minutes, and then placed in a melting furnace to be heated and smelted into liquid aluminum, and the temperature of the liquid aluminum is controlled to be 720 ° C, and the temperature is kept for 15 minutes. Add zinc to the solution, melt and stir evenly, add manganese, strontium, nickel, tin and lanthanum wrapped with aluminum foil until it is completely melted, stir evenly, remove slag, and keep the temperature for 3 hours to obtain a mixed solution;
(4)浇注成型：混合液在模具710℃浇注成型，并冷却至室温，即可。(4) Pouring molding: the mixed solution is poured and molded in the mold at 710°C, and cooled to room temperature.
所述的步骤(1)中，所述的熔炼条件具体为：熔炼温度为750℃，熔炼时间为15min，待所述铝锭完全熔化后，搅拌2min，然后以3℃/min的速度降温至650℃，得到铝液；在熔炼过程中持续通入氮气进行保护。In the step (1), the smelting conditions are as follows: the smelting temperature is 750°C, the smelting time is 15min, after the aluminum ingot is completely melted, stir for 2min, and then cool down to 3°C/min. 650 ° C to obtain molten aluminum; during the smelting process, nitrogen was continuously introduced for protection.
所述的步骤(2)中，所述的铝合金颗粒过80目筛，取筛下物；筛上物加入铝液中重新处理。In the step (2), the aluminum alloy particles are passed through an 80-mesh sieve, and the material under the sieve is taken; the material above the sieve is added to the aluminum liquid for reprocessing.
所述的步骤(3)中，所述的锌、铝、锰、锶、镍、锡和镧的纯度均高于99.9％。In the step (3), the purity of the zinc, aluminum, manganese, strontium, nickel, tin and lanthanum are all higher than 99.9%.
实施例3Example 3
一种耐腐蚀铝合金牺牲阳极，由铝、锌、锰、锶、镍、锡和镧组成；所述锌的质量百分比为5％；所述锰的质量百分比为0.3％；所述锶的质量百分比为0.10％；所述镍的质量百分比为0.5％；所述锡的质量百分比为0.15％；所述镧的质量百分比为0.05％；余量为铝和不可避免的杂质。A corrosion-resistant aluminum alloy sacrificial anode is composed of aluminum, zinc, manganese, strontium, nickel, tin and lanthanum; the mass percentage of the zinc is 5%; the mass percentage of the manganese is 0.3%; the mass percentage of the strontium The percentage is 0.10%; the mass percentage of nickel is 0.5%; the mass percentage of tin is 0.15%; the mass percentage of lanthanum is 0.05%; the balance is aluminum and inevitable impurities.
所述的耐腐蚀铝合金牺牲阳极，杂质钒含量为0.03％，杂质铜<0.01％，杂质的总量为0.09％。In the corrosion-resistant aluminum alloy sacrificial anode, the impurity content of vanadium is 0.03%, the impurity copper is less than 0.01%, and the total amount of impurities is 0.09%.
所述的耐腐蚀铝合金牺牲阳极的制备方法，包括以下步骤：The preparation method of the corrosion-resistant aluminum alloy sacrificial anode comprises the following steps:
(1)熔炼：将铝锭进行熔炼，得铝液，在熔炼过程中持续通入惰性气体进行保护；(1) Smelting: the aluminum ingot is smelted to obtain molten aluminum, and the inert gas is continuously introduced into the smelting process for protection;
(2)喷淋造粒：铝液保温30min后，将铝液的温度升高至900℃，保温5min，后喷淋造粒，得到铝合金颗粒；(2) Spray granulation: after the molten aluminum is kept warm for 30 minutes, the temperature of the molten aluminum is raised to 900° C., maintained for 5 minutes, and then sprayed and granulated to obtain aluminum alloy particles;
(3)混合：铝合金颗粒置于丙酮中，加入乙醇，450kHz超声清洗1min，再 将其置于熔炼炉中加热熔炼成液态铝，并控制液态铝在温度为750℃，保温10min，在铝液中加入锌，熔化、搅拌均匀后，加入用铝箔包裹的锰、锶、镍、锡和镧，至完全熔化，搅匀后扒渣，保温3.5h，得到混合液；(3) Mixing: The aluminum alloy particles are placed in acetone, added with ethanol, ultrasonically cleaned at 450 kHz for 1 min, and then placed in a melting furnace to heat and smelt into liquid aluminum, and the temperature of the liquid aluminum is controlled to be 750 ° C, and the temperature is kept for 10 min. Add zinc to the solution, melt and stir evenly, add manganese, strontium, nickel, tin and lanthanum wrapped with aluminum foil until it is completely melted, stir evenly, remove slag, and keep the temperature for 3.5 hours to obtain a mixed solution;
(4)浇注成型：混合液在模具中700℃浇注成型，并冷却至室温，即可。(4) Pouring molding: the mixed solution is poured and molded in a mold at 700°C, and cooled to room temperature.
所述的步骤(1)中，所述的熔炼条件具体为：熔炼温度为780℃，熔炼时间为10min，待所述铝锭完全熔化后，搅拌3min，然后以2℃/min的速度降温至670℃，得到铝液；在熔炼过程中持续通入氮气进行保护。In the step (1), the smelting conditions are as follows: the smelting temperature is 780°C, the smelting time is 10min, after the aluminum ingot is completely melted, stir for 3min, and then cool down to 2°C/min. At 670°C, molten aluminum was obtained; during the smelting process, nitrogen was continuously introduced for protection.
所述的步骤(2)中，所述的铝合金颗粒过80目筛，取筛下物；筛上物加入铝液中重新处理。In the step (2), the aluminum alloy particles are passed through an 80-mesh sieve, and the material under the sieve is taken; the material above the sieve is added to the aluminum liquid for reprocessing.
所述的步骤(3)中，所述的锌、铝、锰、锶、镍、锡和镧的纯度均高于99.9％。In the step (3), the purity of the zinc, aluminum, manganese, strontium, nickel, tin and lanthanum are all higher than 99.9%.
对比例1Comparative Example 1
将实施例1中的锶元素去除，其余配比和制备方法不变。The strontium element in Example 1 was removed, and the remaining proportions and preparation methods remained unchanged.
对比例2Comparative Example 2
将实施例1中的钒元素的含量提升至0.07％，其余配比和制备方法不变，杂质的总含量保持不变。The content of vanadium element in Example 1 was increased to 0.07%, the remaining proportions and preparation methods remained unchanged, and the total content of impurities remained unchanged.
对比例3Comparative Example 3
将实施例1中的喷淋造粒和有机溶剂超声波清洗两个步骤去除，其余配比和制备方法不变，杂质的总含量保持不变。The two steps of spray granulation and organic solvent ultrasonic cleaning in Example 1 were removed, and the remaining proportions and preparation methods remained unchanged, and the total content of impurities remained unchanged.
以下对实施例1-3和对比例1-3的铝合金牺牲阳极进行测试。The aluminum alloy sacrificial anodes of Examples 1-3 and Comparative Examples 1-3 were tested below.
测试1：Test 1:
电化学性能测试方法参照GB/T 17848-1999中的恒电流实验法，并在常温条件下对实施例1-3和对比例1-3制备得到的所述铝合金牺牲阳极，进行电化 学性能及溶液性测试，具体测试数据见表1。The electrochemical performance test method refers to the constant current experimental method in GB/T 17848-1999, and the electrochemical performance of the aluminum alloy sacrificial anodes prepared in Examples 1-3 and Comparative Examples 1-3 is tested under normal temperature conditions. And solution test, the specific test data are shown in Table 1.
试验介质：人造海水，试验温度为常温。Test medium: artificial seawater, and the test temperature is normal temperature.
表1：铝合金牺牲阳极的电化学性能及溶液性测试结果；Table 1: Electrochemical properties and solution test results of aluminum alloy sacrificial anodes;
Figure PCTCN2021108713-appb-000001
Figure PCTCN2021108713-appb-000001
由以上测试数据可以知道，本发明实施例1-3的铝合金牺牲阳极不但耐磨性能好，而且电流效率高于93％，开路电位为-1.17～-1.21V，电容量 ≥1200A·h/kg，应用前景广泛。From the above test data, it can be known that the aluminum alloy sacrificial anode of Example 1-3 of the present invention not only has good wear resistance, but also has a current efficiency higher than 93%, an open circuit potential of -1.17 to -1.21V, and a capacitance of ≥1200A·h/ kg, has wide application prospects.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (8)

  1. 一种耐腐蚀铝合金牺牲阳极，其特征在于，由铝、锌、锰、锶、镍、锡和镧组成；所述锌的质量百分比为5～8％；所述锰的质量百分比为0.1～0.3％；所述锶的质量百分比为0.1～0.18％；所述镍的质量百分比为0.2～0.5％；所述锡的质量百分比为0.15～0.22％；所述镧的质量百分比为0.02～0.05％；余量为铝和不可避免的杂质。A corrosion-resistant aluminum alloy sacrificial anode is characterized in that, it is composed of aluminum, zinc, manganese, strontium, nickel, tin and lanthanum; the mass percentage of zinc is 5-8%; the mass percentage of manganese is 0.1-8% 0.3%; the mass percentage of the strontium is 0.1-0.18%; the mass percentage of the nickel is 0.2-0.5%; the mass percentage of the tin is 0.15-0.22%; the mass percentage of the lanthanum is 0.02-0.05% ; The balance is aluminum and inevitable impurities.
  2. 如权利要求1所述的耐腐蚀铝合金牺牲阳极，其特征在于，杂质的总含量低于0.10％。The corrosion-resistant aluminum alloy sacrificial anode of claim 1, wherein the total content of impurities is less than 0.10%.
  3. 如权利要求2所述的耐腐蚀铝合金牺牲阳极，其特征在于，杂质钒≤0.05％，杂质铜≤0.01％。The corrosion-resistant aluminum alloy sacrificial anode according to claim 2, wherein the impurity vanadium is less than or equal to 0.05%, and the impurity copper is less than or equal to 0.01%.
  4. 如权利要求1-3任一所述的耐腐蚀铝合金牺牲阳极的制备方法，其特征在于，包括以下步骤：The preparation method of the corrosion-resistant aluminum alloy sacrificial anode according to any one of claims 1-3, characterized in that, comprising the following steps:
    (1)熔炼：将铝锭进行熔炼，得铝液，在熔炼过程中持续通入惰性气体进行保护；(1) Smelting: the aluminum ingot is smelted to obtain molten aluminum, and the inert gas is continuously introduced into the smelting process for protection;
    (2)喷淋造粒：铝液保温30～35min后，将铝液的温度升高至850-900℃，保温5～8min，后喷淋造粒，得到铝合金颗粒；(2) Spray granulation: after the molten aluminum is kept warm for 30-35 minutes, the temperature of the molten aluminum is raised to 850-900°C, kept for 5-8 minutes, and then sprayed and granulated to obtain aluminum alloy particles;
    (3)混合：铝合金颗粒置于丙酮中，加入乙醇，350-450kHz超声清洗1-3min，再将其置于熔炼炉中加热熔炼成液态铝，并控制液态铝在温度为720-750℃，保温10～15min，在铝液中加入锌，熔化、搅拌均匀后，加入用铝箔包裹的锰、锶、镍、锡和镧，至完全熔化，搅匀后扒渣，保温3～3.5h，得到混合液；(3) Mixing: The aluminum alloy particles are placed in acetone, added with ethanol, ultrasonically cleaned at 350-450kHz for 1-3min, and then placed in a melting furnace to heat and smelt into liquid aluminum, and the temperature of the liquid aluminum is controlled to be 720-750 ℃ , heat preservation for 10 to 15 minutes, add zinc to the molten aluminum, melt and stir evenly, add manganese, strontium, nickel, tin and lanthanum wrapped with aluminum foil until it is completely melted, stir evenly, remove slag, and keep warm for 3 to 3.5 hours. get the mixture;
    (4)浇注成型：混合液在模具中700～710℃浇注成型，并冷却至室温，即可。(4) Pouring molding: the mixed solution is poured and molded in the mold at 700-710 °C, and cooled to room temperature.
  5. 如权利要求4所述的耐腐蚀铝合金牺牲阳极的制备方法，其特征在于，所述的步骤(1)中，所述的熔炼条件具体为：熔炼温度为750～780℃，熔炼时间为10～15min，待所述铝锭完全熔化后，搅拌2～3min，然后以2～3℃/min的速 度降温至650～670℃，得到铝液；在熔炼过程中持续通入氮气进行保护。The method for preparing a corrosion-resistant aluminum alloy sacrificial anode according to claim 4, wherein in the step (1), the smelting conditions are as follows: the smelting temperature is 750-780°C, and the smelting time is 10 ～15min, after the aluminum ingot is completely melted, stir for 2～3min, and then cool down to 650～670°C at a speed of 2～3°C/min to obtain molten aluminum; during the smelting process, nitrogen is continuously introduced for protection.
  6. 如权利要求4所述的耐腐蚀铝合金牺牲阳极的制备方法，其特征在于，所述的步骤(2)中，所述的铝合金颗粒过80目筛，取筛下物；筛上物加入铝液中重新处理。The method for preparing a corrosion-resistant aluminum alloy sacrificial anode according to claim 4, wherein in the step (2), the aluminum alloy particles are passed through an 80-mesh sieve, and the material under the sieve is taken; the material on the sieve is added to the Reprocessing in molten aluminum.
  7. 如权利要求4所述的耐腐蚀铝合金牺牲阳极的制备方法，其特征在于，所述的步骤(3)中，所述的锌、铝、锰、锶、镍、锡和镧的纯度均高于99.9％。The method for preparing a corrosion-resistant aluminum alloy sacrificial anode according to claim 4, wherein in the step (3), the purity of the zinc, aluminum, manganese, strontium, nickel, tin and lanthanum are all high at 99.9%.
  8. 如权利要求4所述的耐腐蚀铝合金牺牲阳极的制备方法，其特征在于，所述的铝合金牺牲阳极，电流效率高于93％，开路电位为-1.17～-1.21V，电容量≥1200A·h/kg。The method for preparing a corrosion-resistant aluminum alloy sacrificial anode according to claim 4, wherein the aluminum alloy sacrificial anode has a current efficiency higher than 93%, an open circuit potential of -1.17 to -1.21V, and a capacitance of ≥1200A ·h/kg.
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