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Method for electroplating metal on surface of stephanoporate metal product

A technology of porous metal and electroplating metal, which is applied in the field of electroplating metal on the surface of porous metal products, which can solve problems such as uneven coating and achieve uniform coating

Active Publication Date: 2009-05-20
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for electroplating metal on the surface of porous metal products with good surface leveling performance, aiming at the problem of uneven coating on the inner and outer surfaces of the pores when the porous metal products are electroplated

Method used

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  • Method for electroplating metal on surface of stephanoporate metal product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Platinum-plating a 200×200×0.25mm porous titanium plate with a porosity of 50%. After repeated cleaning with pure water, start the suction filter pump 7, make the flow rate of the electroplating solution 9 be 45L / min, start the ultrasonic generator, the ultrasonic frequency is 20kHz, place the porous titanium plate plated parts on the two platinum-plated titanium mesh anodes 4 Between, the distance between the two platinum-plated titanium mesh anodes 4 is 160mm, the voltage is adjusted to 2.3V, the current is 9A, the electroplating time is 20min, and then the voltage is adjusted to 1.9v, the current is 1.9A, and the electroplating time is 30min, so that the thickness of the platinum coating is It can reach 2μm, and platinum is deposited on the surface and pores of the porous titanium plate to achieve uniform platinum plating.

Embodiment 2

[0020] 200×200×0.25mm porous nickel fiber mat with a porosity of 60% is subjected to platinum plating: first, the surface of the 200×200×0.25mm porous nickel fiber mat with a porosity of 60% is chemically treated to remove oil and surface oxides Finally, after repeated cleaning with pure water, start the suction filter pump 7, so that the flow rate of the electroplating solution 9 is 20L / min, start the ultrasonic generator, the ultrasonic frequency is 30kHz, and place the porous nickel fiber felt on the two platinum-plated titanium mesh anodes. At the position of 5 between 4, the distance between the two anodes is 160mm, the voltage is 2.3V, the current is 9A, the electroplating time is 20min, and then the voltage is adjusted to 1.9v, the current is 1.9A, and the electroplating time is 30min, so that the thickness of the platinum coating is It can reach 2μm, and platinum is deposited on the surface and pores of the porous nickel fiber felt to achieve uniform platinum plating. ...

Embodiment 3

[0022] Apply platinum plating to a 200×200×0.25mm porous stainless steel fiber felt with a porosity of 70%: first, perform surface chemical treatment on a 200×200×0.25mm porous stainless steel fiber felt with a porosity of 70% to remove oil and surface oxides Finally, after repeated cleaning with pure water, start the suction filter pump 7, make the flow rate of the electroplating solution 9 be 30L / min, start the ultrasonic generator, the ultrasonic frequency is 40kHz, and place the porous stainless steel fiber felt on two platinum-coated titanium meshes. Between the anodes 4, the distance between the two platinum-plated titanium mesh anodes 4 is 160mm, the voltage is 2.3V, the current is 9A, the electroplating time is 20min, and then the voltage is adjusted to 1.9v, the current is 1.9A, and the electroplating time is 30min. It can reach 2μm, and platinum is deposited on the surface and pores of the porous stainless steel fiber felt to achieve uniform platinum plating.

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Abstract

The invention provides a method for electroplating metal on a porous metal product surface, which comprises: the porous metal product surface is subjected to surface chemical treatment for oil and surface oxide removal, and cleaned by purified water repeatedly; a suction filter pump and an ultrasonic generator are started to lead the flow speed of electroplate liquid to be 15 to 50L / min and the ultrasonic frequency to be 20 to 40kHz; and the cleaned porous metal product is placed between two platinized and titanized mesh anodes which are arranged in an electrolytic bath provided with the ultrasonic generator side by side for electroplating. The method adopts a suction filter method when electroplating to lead the electroplate liquid to pass through the porous metal product at a certain flow speed; ultrasonic vibration is adopted to accelerate the migration of ions in the pores, so as to lead the concentration of cations in the pores to be consistent with that in the electroplate liquid; and plating layers on the inner surface and the outer surface of the pores of the porous metal product are uniform when electroplating.

Description

technical field [0001] The invention relates to a method for electroplating metal on a metal surface, in particular to a method for electroplating metal on the surface of a porous metal product. Background technique [0002] Porous metal materials have dual functions of functional materials and structural materials, and are widely used in aviation, aerospace, chemical, automotive and other industries. Porous metals are used in electrolyzed water oxygen generators to play the role of electrical connection, gas-liquid permeation, and providing elastic margin. It must have an appropriate thickness and sufficient porosity. In foreign countries, the porosity of the porous metal plate used in the electrolytic water oxygen production device is very high, up to 50%, and the thickness is only 0.25mm thick. Level. The coatings for hydrogen (oxygen) production by electrolysis of water in foreign countries mainly use platinum group metals or their oxide coatings. Compared with platin...

Claims

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Application Information

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IPC IPC(8): C25D5/00C25D7/00C25B11/03
Inventor 杜继红杨升红奚正平李争显李晴宇马秀芬胡湘银唐勇姬寿长
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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