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Copper stripping solution of permeability alloy and method for recycling permeability alloy

A technology of permalloy and solution recovery, applied in the field of alloy recovery and treatment, can solve the problems of metal corrosion, alloy body wear, pitting corrosion, etc., and achieves the effect of simple method, avoiding excessive speed, and retaining shape and performance.

Active Publication Date: 2017-08-18
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical grinding method is not easy to grasp the grinding strength, which not only polishes off the outer layer of copper coating, but also wears the alloy body; and under chemical methods, it is boiled off under strong alkaline conditions, and the copper coating is removed by anodic method or concentrated nitric acid method. 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 unavoidable pockmarked corrosion on the alloy substrate, and the alloy after copper removal must be re-polished before it can continue to be used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Prepare 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 the volume V of copper-plated permalloy before the reaction is measured in advance 前 , soak the permalloy with a volume ratio of 1:25 to the copper stripping solution in the above copper stripping solution; control the reaction temperature at 5°C, take out the alloy after 40 minutes of reaction, rinse it with water and place it at 100°C After drying for 3 hours, the volume V of permalloy after the reaction was measured 后 , according to the calculation, the consumption rate of the copper coating is 0.01mm / h.

[0033] 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.

Embodiment 2

[0035] Prepare the saturated copper nitrate solution containing 7mol / L nitric acid, the volume ratio of the added concentrated nitric acid and saturated copper nitrate is 3:1, and the volume V of copper-plated permalloy before the reaction is measured in advance 前 , Soak the permalloy with a volume ratio of 1:28 to the copper stripping solution in the above copper stripping solution; control the reaction temperature at 10°C, take out the alloy after 30 minutes of reaction, rinse it with water and place it at 110°C After drying for 2.5 hours, the volume V of permalloy after the reaction was measured 后 , according to the calculation, the consumption rate of the copper coating is 0.02mm / h.

[0036] 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.

Embodiment 3

[0038] Prepare the saturated copper nitrate solution containing 8mol / L nitric acid, the volume ratio of the added concentrated nitric acid and saturated copper nitrate is 2:1, and the volume V of copper-plated permalloy before the reaction is measured in advance 前 , soak the permalloy with a volume ratio of 1:30 to the copper stripping solution in the above copper stripping solution; control the reaction temperature at 20°C, take out the alloy after 30 minutes of reaction, rinse it with water and place it at 110°C After drying for 2 hours, measure the volume V of permalloy after the reaction 后 , according to the calculation, the consumption rate of the copper coating is 0.02mm / h.

[0039] 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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Abstract

The invention discloses a copper stripping solution of a copper plating permeability alloy and a method for recycling the permeability alloy, and belongs to the technical field of alloy recycling. The method comprises the following steps that the copper stripping solution of the permeability alloy is prepared in proportion, the copper plating permeability alloy is soaked in the copper stripping solution, temperature control reacting is achieved, and meanwhile the content of concentrated nitric acid in the copper stripping solution is controlled; and after reacting is finished, saturated lime water is used for washing the surface of the permeability alloy, and drying and storing are achieved. According to the method, the copper plating permeability alloy is fast and effectively recycled.

Description

technical field [0001] 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. Background technique [0002] 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. [0003] 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, conce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/44
CPCC23F1/44
Inventor 孙金峰孟永强赵隽祝宏帅
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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