CN107059009A - The method for moving back copper solution and recovery permalloy of permalloy - Google Patents
The method for moving back copper solution and recovery permalloy of permalloy Download PDFInfo
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- 229910000889 permalloy Inorganic materials 0.000 title claims abstract description 69
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 60
- 239000010949 copper Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000011084 recovery Methods 0.000 title abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 44
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 28
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical class [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 3
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical class [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 37
- 238000007747 plating Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 27
- 239000000956 alloy Substances 0.000 abstract description 27
- 238000002791 soaking Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 description 16
- 238000000576 coating method Methods 0.000 description 16
- 239000003153 chemical reaction reagent Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- LJRGBERXYNQPJI-UHFFFAOYSA-M sodium;3-nitrobenzenesulfonate Chemical compound [Na+].[O-][N+](=O)C1=CC=CC(S([O-])(=O)=O)=C1 LJRGBERXYNQPJI-UHFFFAOYSA-M 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- 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
- C23F1/00—Etching metallic material by chemical means
- C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemically Coating (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
本发明公开了铜镀坡莫合金的退铜溶液以及回收坡莫合金的方法，属于合金回收技术领域，包含以下步骤，按比例配制坡莫合金的退铜溶液，将铜镀坡莫合金浸泡于退铜溶液中，控温反应，同时控制退铜溶液中浓硝酸的含量；反应结束后，用饱和石灰水冲洗坡莫合金的表面，并烘干保存。本发明提供一种快速、有效地回收铜镀坡莫合金的方法。The invention discloses a copper-removing solution for copper-plated permalloy and a method for recovering permalloy, belonging to the technical field of alloy recovery, comprising the following steps: preparing the copper-removing solution for permalloy in proportion, and soaking the copper-plated permalloy in In the copper stripping solution, the temperature is controlled for reaction, and at the same time the content of concentrated nitric acid in the copper stripping solution is controlled; after the reaction, the surface of the permalloy is washed with saturated lime water, and dried for storage. The invention provides a method for quickly and effectively recovering copper-plated permalloy.
Description
技术领域technical field
本发明涉及一种坡莫合金的退铜溶液及回收坡莫合金的方法，属于合金回收处理技术领域。The invention relates to a copper-removing solution of permalloy and a method for recovering permalloy, belonging to the technical field of alloy recovery and treatment.
背景技术Background technique
坡莫合金指铁镍合金，其含镍量的范围很广，在35％～90％之间。坡莫合金的最大特点是具有很高的弱磁场导磁率，它们的饱和磁感应强度一般在0.6～1.0T之间。由于坡莫合金化学活性较强，因此，坡莫合金零件在加工好后使用时一般在坡莫合金零件表面需要镀一层铜，以防止其氧化，而在废旧的坡莫合金回收过程中往往要退除外面的铜镀层，从而对内层中铁镍合金加以回收再利用。Permalloy refers to iron-nickel alloy, and its nickel content ranges from 35% to 90%. The biggest characteristic of Permalloy is that it has a high magnetic permeability in weak magnetic fields, and their saturation magnetic induction is generally between 0.6 and 1.0T. Due to the strong chemical activity of Permalloy, Permalloy parts generally need to be coated with a layer of copper on the surface of Permalloy parts to prevent oxidation. The copper plating layer on the outside should be withdrawn, so that the iron-nickel alloy in the inner layer can be recycled and reused.
坡莫合金基体上的铜镀层退除，通常采用机械打磨法或化学方法比如：间硝基苯磺酸钠和氰化钠、浓硝酸。机械打磨法不易把握打磨的力度往往不仅打磨掉外层的铜镀层，而且对合金本体也有所磨损；而化学方法下，在强碱性条件下煮退、阳极法或浓硝酸法退除铜镀层的反应速率不易控制，同时对基体本身金属也会产生腐蚀作用，造成合金基体上不可避免地产生麻子状腐蚀，退铜后的合金要重新抛光后才能继续使用。The copper plating on the permalloy substrate is usually removed by mechanical grinding or chemical methods such as: sodium m-nitrobenzene sulfonate and sodium cyanide, concentrated nitric acid. The mechanical grinding method is not easy to grasp the grinding strength, which not only grinds off the outer copper coating, but also wears the alloy body; and chemical methods, boil off under strong alkaline conditions, anodic method or concentrated nitric acid method to remove the copper coating The reaction rate of the alloy is not easy to control, and at the same time, it will also cause corrosion to the metal of the substrate itself, resulting in inevitable pockmarked corrosion on the alloy substrate, and the alloy after copper removal must be re-polished before it can continue to be used.
发明内容Contents of the invention
本发明需要解决的技术问题是如何提供一种快速、有效并且不会影响内层合金回收使用的方法。The technical problem to be solved in the present invention is how to provide a fast and effective method that does not affect the recycling and use of the inner layer alloy.
为解决上述技术问题，本发明所采用的技术方案是：In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
在饱和硝酸铜溶液中加入6～15mol/L的浓硝酸。Add 6-15mol/L concentrated nitric acid into the saturated copper nitrate solution.
本发明技术方案的进一步改进在于：浓硝酸控制在7～15mol/L之间。The further improvement of the technical solution of the present invention lies in that the concentrated nitric acid is controlled between 7-15 mol/L.
本发明技术方案的进一步改进在于：浓硝酸与饱和硝酸铜的体积比为2:1～3:1。The further improvement of the technical solution of the present invention lies in that: the volume ratio of concentrated nitric acid to saturated copper nitrate is 2:1-3:1.
本发明技术方案的进一步改进在于：包含以下步骤，按比例配制坡莫合金的退铜溶液，将铜镀坡莫合金浸泡于退铜溶液中，控温反应，同时控制退铜溶液中浓硝酸的含量；反应结束后，用饱和石灰水冲洗坡莫合金的表面，并烘干保存。The further improvement of the technical solution of the present invention is: comprising the following steps, preparing the copper-removing solution of permalloy in proportion, soaking the copper-plated permalloy in the copper-removing solution, controlling the temperature and reacting, and simultaneously controlling the concentration of concentrated nitric acid in the copper-removing solution content; after the reaction, rinse the surface of the permalloy with saturated lime water, and dry it for storage.
本发明技术方案的进一步改进在于：加入的铜镀坡莫合金与退铜溶液的体积比为1:25～1:40。The further improvement of the technical solution of the present invention lies in that: the volume ratio of the added copper-plated permalloy to the copper stripping solution is 1:25-1:40.
本发明技术方案的进一步改进在于：铜镀坡莫合金在退铜溶液中的反应温度为5～30℃。The further improvement of the technical solution of the present invention lies in that the reaction temperature of the copper-plated permalloy in the copper stripping solution is 5-30°C.
本发明技术方案的进一步改进在于：铜镀坡莫合金在退铜溶液中铜镀层的消耗速率为0.01～0.03mm/h。The further improvement of the technical solution of the present invention lies in that the consumption rate of the copper plating layer in the copper stripping solution of the copper-plated permalloy is 0.01-0.03 mm/h.
本发明技术方案的进一步改进在于：反应时间为10～40min。The further improvement of the technical solution of the present invention lies in that the reaction time is 10-40 minutes.
本发明技术方案的进一步改进在于：坡莫合金的烘干的温度为100～120℃，烘干时间为2～3h。The further improvement of the technical solution of the present invention lies in that the drying temperature of the permalloy is 100-120° C., and the drying time is 2-3 hours.
由于采用了上述技术方案，本发明取得的技术进步是：Owing to having adopted above-mentioned technical scheme, the technical progress that the present invention obtains is:
本发明将铜镀坡莫合金浸泡于特制的一种退铜溶液中，通过控制浓硝酸的浓度和反应的温度，能够保证坡莫合金外层铜镀层溶解；同时，里层的合金基体形状和性能不被破坏。本发明的工艺回收坡莫合金方法简单、独特，利用本方法能够方便地退除坡莫合金外层的铜镀层。In the present invention, the copper-plated permalloy is soaked in a special copper-removing solution, and by controlling the concentration of concentrated nitric acid and the reaction temperature, the dissolution of the outer layer of the permalloy copper coating can be ensured; meanwhile, the shape and shape of the inner layer of the alloy matrix and Performance is not compromised. The process recovery method of the permalloy of the present invention is simple and unique, and the copper coating on the outer layer of the permalloy can be conveniently removed by using the method.
本发明中利用铜与浓硝酸的化学反应性质，同时在体系中加入了饱和的硝酸铜溶液，避免了单纯的浓硝酸溶液与铜镀层反应的速度过快，反应不易控制的现象。浓硝酸的浓度在7～15mol/L，反应的温度控制在5～30℃范围之内，能够使得浓硝酸能够完全腐蚀坡莫合金外的铜镀层，而不会对内部的铁镍合金有腐蚀。因此，既退除了坡莫合金的铜镀层，也保证了坡莫合金的形状和性能都得到完好保留。In the present invention, the chemical reaction property of copper and concentrated nitric acid is utilized, and a saturated copper nitrate solution is added to the system at the same time, so as to avoid the phenomenon that the reaction speed between the simple concentrated nitric acid solution and the copper plating layer is too fast and the reaction is difficult to control. The concentration of concentrated nitric acid is 7-15mol/L, and the reaction temperature is controlled within the range of 5-30°C, so that the concentrated nitric acid can completely corrode the copper coating outside the permalloy without corroding the internal iron-nickel alloy. . Therefore, not only the copper plating layer of the permalloy is removed, but also the shape and performance of the permalloy are guaranteed to be preserved intact.
本发明配制的退铜溶液中含有饱和的硝酸铜溶液，反应过程中沉积下来的硝酸铜都是由坡莫合金的铜镀层反应得到。通过对反应生成物硝酸铜的收集、称量，可以推到得到坡莫合金的中铜镀层的质量，结合反应前、后的体积对比，可以得出消耗掉的铜镀层厚度。方便了通过对沉淀下来的硝酸铜质量的控制，进而预计消耗铜镀层的厚度，增加了回收过程中对反应程度的可控性。The copper stripping solution prepared by the invention contains a saturated copper nitrate solution, and the copper nitrate deposited in the reaction process is all obtained from the copper plating reaction of the permalloy. Through the collection and weighing of the reaction product copper nitrate, the quality of the copper coating in the permalloy can be deduced, combined with the volume comparison before and after the reaction, the thickness of the copper coating consumed can be obtained. It is convenient to control the quality of the precipitated copper nitrate, and then estimate the thickness of the consumed copper coating, which increases the controllability of the reaction degree in the recovery process.
本发明在回收过程定期取出沉积在底部的硝酸铜，这些硝酸铜可以再次作为退铜溶液配置原料；同时，沉积下来的硝酸铜纯度很高能够达到HG/T3443-2014化学试剂标准，可以作为副产品销售。The present invention regularly takes out the copper nitrate deposited at the bottom during the recovery process, and these copper nitrates can be used as raw materials for the copper stripping solution again; at the same time, the copper nitrate deposited has a high purity and can reach the HG/T3443-2014 chemical reagent standard, and can be used as a by-product Sales.
具体实施方式detailed description
下面对本发明做进一步详细说明：The present invention is described in further detail below:
本发明中的退铜溶液中含有浓度为6～15mol/L的浓硝酸和饱和硝酸铜溶液，浓硝酸与饱和硝酸铜加入的体积比为2:1～3:1。The copper stripping solution in the present invention contains concentrated nitric acid and saturated copper nitrate solution with a concentration of 6-15 mol/L, and the volume ratio of concentrated nitric acid and saturated copper nitrate is 2:1-3:1.
本发明中回收坡莫合金的方法如下：首先，按照铜镀坡莫合金与退铜溶液体积比为1:25～1:40，保证将铜镀坡莫合金能够完全浸泡于退铜溶液中，控温反应温度为5～30℃反应10～40min；然后，取出坡莫合金，用水冲洗坡莫合金的表面并烘干保存。坡莫合金的烘干的温度为100～120℃，烘干时间为2～3h。根据反应系统的大小，定期取出沉积在反应器底部的硝酸铜，硝酸铜可以继续用作配制退铜溶液的原料；同时，按照本发明的方法产生的硝酸铜能达到HG/T3443-2014化学试剂标准，也可以作为化学试剂销售，产生一定的经济效益。本发明将反应体系中生成的二氧化氮气体利用吸收塔进行吸收，避免了对环境的污染。The method of reclaiming permalloy in the present invention is as follows: first, according to the volume ratio of copper-plated permalloy and copper-removing solution is 1:25～1:40, guarantees that copper-plated permalloy can be fully immersed in the copper-removing solution, The temperature control reaction temperature is 5-30° C. for 10-40 minutes; then, the permalloy is taken out, the surface of the permalloy is washed with water, and dried for storage. The drying temperature of permalloy is 100-120° C., and the drying time is 2-3 hours. According to the size of the reaction system, the copper nitrate deposited on the bottom of the reactor is regularly taken out, and the copper nitrate can continue to be used as the raw material for preparing the copper stripping solution; meanwhile, the copper nitrate produced by the method of the present invention can reach the level of HG/T3443-2014 chemical reagent Standards can also be sold as chemical reagents, resulting in certain economic benefits. The invention absorbs the nitrogen dioxide gas generated in the reaction system by using an absorption tower, thereby avoiding environmental pollution.
本发明中可以通过称量沉积下来的硝酸铜质量，可以推出消耗掉的铜镀层厚度。根据下述步骤可以计算得到：In the present invention, the copper nitrate quality deposited can be weighed to deduce the consumed copper plating thickness. It can be calculated according to the following steps:
1)通过沉积出的硝酸铜推算出参加反应的铜质量m铜，由于退铜溶液中含有饱和的硝酸铜，沉积得到的硝酸铜都是由坡莫合金外层的铜镀层反应得到的；1) Calculate the copper quality m copper participating in the reaction by the copper nitrate deposited, because the copper nitrate solution contains saturated copper nitrate, the copper nitrate deposited is obtained by the copper coating reaction of the permalloy outer layer;
2)通过下述关系式，可以得到反应掉的铜镀层的厚度：2) by following relational formula, can obtain the thickness of the copper coating that reacts:
m铜＝ρ铜(V前-V后)m copper = ρ copper (V before - V after )
V前—反应前铜镀坡莫合金的体积；Vfront—the volume of copper-plated permalloy before the reaction;
V后—反应后坡莫合金的体积；Vafter—the volume of permalloy after reaction;
根据计算得出铜镀层的消耗速度为0.01～0.03mm/h。According to the calculation, the consumption rate of the copper coating is 0.01-0.03mm/h.
下面结合实施例对本发明做进一步详细说明：Below in conjunction with embodiment the present invention is described in further detail:
实施例1、Embodiment 1,
配制含有6mol/L硝酸的饱和硝酸铜溶液中，加入的浓硝酸与饱和硝酸铜的体积比为2:1，预先测得反应前铜镀坡莫合金的体积V前，将与退铜溶液体积比为1:25的坡莫合金浸泡于上述的退铜溶液中；控制反应的温度为5℃下，反应40min后将合金取出，用水冲洗干净并置于100℃下烘干3小时，测得反应后坡莫合金的体积V后，根据计算得到铜镀层的消耗速率为0.01mm/h。In preparing the saturated copper nitrate solution containing 6mol/L nitric acid, the volume ratio of the added concentrated nitric acid and saturated copper nitrate is 2:1, and before the volume V of copper-plated permalloy before the reaction is measured, it will be compared with the volume of the copper stripping solution The permalloy alloy with a ratio of 1:25 is soaked in the above-mentioned copper stripping solution; the temperature of the reaction is controlled at 5°C, and the alloy is taken out after 40 minutes of reaction, rinsed with water and dried at 100°C for 3 hours, measured After the volume V of the permalloy after the reaction, the consumption rate of the copper coating is calculated to be 0.01mm/h.
合金表面的铜镀层被完全溶解，而合金形状和性能都得到完好保留，反应产出硝酸铜达到HG/T 3443-2014化学试剂标准。The copper plating on the surface of the alloy is completely dissolved, while the shape and performance of the alloy are well preserved, and the copper nitrate produced by the reaction meets the chemical reagent standard of HG/T 3443-2014.
实施例2、Embodiment 2,
配制含有7mol/L硝酸的饱和硝酸铜溶液中，加入的浓硝酸与饱和硝酸铜的体积比为3:1，预先测得反应前铜镀坡莫合金的体积V前，将与退铜溶液体积比为1:28的坡莫合金浸泡于上述的退铜溶液中；控制反应的温度为10℃下，反应30min后将合金取出，用水冲洗干净并置于110℃下烘干2.5小时，测得反应后坡莫合金的体积V后，根据计算得到铜镀层的消耗速率为0.02mm/h。In preparing the saturated copper nitrate solution containing 7mol/L nitric acid, the volume ratio of the concentrated nitric acid added to the saturated copper nitrate is 3:1. The permalloy alloy with a ratio of 1:28 is soaked in the above-mentioned copper stripping solution; the temperature of the reaction is controlled at 10°C, and the alloy is taken out after 30 minutes of reaction, rinsed with water and dried at 110°C for 2.5 hours, measured After the volume V of the permalloy after the reaction, the consumption rate of the copper coating is calculated to be 0.02mm/h.
合金表面的铜镀层被完全溶解，而合金形状和性能都得到完好保留，反应产出硝酸铜达到HG/T 3443-2014化学试剂标准。The copper plating on the surface of the alloy is completely dissolved, while the shape and performance of the alloy are well preserved, and the copper nitrate produced by the reaction meets the chemical reagent standard of HG/T 3443-2014.
实施例3、Embodiment 3,
配制含有8mol/L硝酸的饱和硝酸铜溶液中，加入的浓硝酸与饱和硝酸铜的体积比为2:1，预先测得反应前铜镀坡莫合金的体积V前，将与退铜溶液体积比为1:30的坡莫合金浸泡于上述的退铜溶液中；控制反应的温度为20℃下，反应30min后将合金取出，用水冲洗干净并置于110℃下烘干2小时，测得反应后坡莫合金的体积V后，根据计算得到铜镀层的消耗速率为0.02mm/h。In preparing the saturated copper nitrate solution containing 8mol/L nitric acid, the volume ratio of the concentrated nitric acid added to the saturated copper nitrate is 2:1. The permalloy alloy with a ratio of 1:30 is soaked in the above-mentioned copper stripping solution; the temperature of the reaction is controlled at 20°C, and the alloy is taken out after 30 minutes of reaction, rinsed with water and dried at 110°C for 2 hours, measured After the volume V of the permalloy after the reaction, the consumption rate of the copper coating is calculated to be 0.02mm/h.
合金表面的铜镀层被完全溶解，而合金形状和性能都得到完好保留，反应产出硝酸铜达到HG/T 3443-2014化学试剂标准。The copper plating on the surface of the alloy is completely dissolved, while the shape and performance of the alloy are well preserved, and the copper nitrate produced by the reaction meets the chemical reagent standard of HG/T 3443-2014.
实施例4、Embodiment 4,
配制含有10mol/L硝酸的饱和硝酸铜溶液中，加入的浓硝酸与饱和硝酸铜的体积比为3:1，预先测得反应前铜镀坡莫合金的体积V前，将与退铜溶液体积比为1:35的坡莫合金浸泡于上述的退铜溶液中；控制反应的温度为30℃下，反应20min后将合金取出，用水冲洗干净并置于115℃下烘干2.5小时，测得反应后坡莫合金的体积V后，根据计算得到铜镀层的消耗速率为0.03mm/h。In preparing the saturated copper nitrate solution containing 10mol/L nitric acid, the volume ratio of the concentrated nitric acid added to the saturated copper nitrate is 3:1. The permalloy with a ratio of 1:35 is soaked in the above-mentioned copper stripping solution; the temperature of the reaction is controlled at 30°C, and the alloy is taken out after 20 minutes of reaction, rinsed with water and dried at 115°C for 2.5 hours, measured After the volume V of the permalloy after the reaction, the consumption rate of the copper coating is calculated to be 0.03 mm/h.
合金表面的铜镀层被完全溶解，而合金形状和性能都得到完好保留，反应产出硝酸铜达到HG/T 3443-2014化学试剂标准。The copper plating on the surface of the alloy is completely dissolved, while the shape and performance of the alloy are well preserved, and the copper nitrate produced by the reaction meets the chemical reagent standard of HG/T 3443-2014.
实施例5、Embodiment 5,
配制含有15mol/L硝酸的饱和硝酸铜溶液中，加入的浓硝酸与饱和硝酸铜的体积比为3:1，预先测得反应前铜镀坡莫合金的体积V前，将与退铜溶液体积比为1:40的坡莫合金浸泡于上述的退铜溶液中；控制反应的温度为25℃下，反应10min后将合金取出，用水冲洗干净并置于120℃下烘干2.5小时，测得反应后坡莫合金的体积V后，根据计算得到铜镀层的消耗速率为0.02mm/h。In preparing the saturated copper nitrate solution containing 15mol/L nitric acid, the volume ratio of the concentrated nitric acid added to the saturated copper nitrate is 3:1. The permalloy alloy with a ratio of 1:40 is soaked in the above-mentioned copper stripping solution; the temperature of the reaction is controlled at 25°C, and the alloy is taken out after 10 minutes of reaction, rinsed with water and dried at 120°C for 2.5 hours, measured After the volume V of the permalloy after the reaction, the consumption rate of the copper coating is calculated to be 0.02mm/h.
合金表面的铜镀层被完全溶解，而合金形状和性能都得到完好保留，反应产出硝酸铜达到HG/T 3443-2014化学试剂标准。The copper plating on the surface of the alloy is completely dissolved, while the shape and performance of the alloy are well preserved, and the copper nitrate produced by the reaction meets the chemical reagent standard of HG/T 3443-2014.
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