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Prepn of foamed aluminium

A foamed aluminum and foam material technology, applied in the electrolysis process, electroforming, etc., can solve the problems of slow diffusion of aluminum ions, etc., and achieve the effect of small pore size, high porosity, and uniform structure

Inactive Publication Date: 2004-04-07
孙伟成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because of the sharp angle effect of electroplating itself and the slow diffusion rate of aluminum ions in the alkyl aluminum plating solution, it is impossible to uniformly coat a layer of aluminum on workpieces with holes or pits. Therefore, generally It is not feasible to electrodeposit aluminum foam with an alkyl aluminum bath
The existing electrodeposition method can only be used to produce nickel, iron, copper, cobalt, chromium and other metals

Method used

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Experimental program
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Effect test

Embodiment approach 1

[0036] Polyurethane foam is selected as the base material, with an average pore size of 0.60mm and a porosity of 90%. After degreasing, degreasing, and stress removal, it is ionized and placed in an electroless copper plating solution to electrolessly plate a layer of copper conductive surface layer. The thickness of the conductive surface layer is 3 to 5 μm. The polyurethane foam material treated by this method is used as the cathode and placed in the electroplating tank of anhydrous organic alkyl aluminum electrolyte, and the industrial pure aluminum plate is used as the anode. aluminum electrodeposition. The electroplating tank of the anhydrous organic alkyl aluminum electrolyte contains 150 parts of triethylaluminum, 20 parts of NaF, and 220 parts of toluene; the temperature of the plating solution is controlled at 80-90° C.; the electrodeposition time is 1 hour.

[0037] The plating cell may be a conventional Watts plating cell. The electroplating power supply is a puls...

Embodiment approach 2

[0043] Polyethylene foam is selected as the base material, with an average pore diameter of 0.85mm and a porosity of 92%. After degreasing, degreasing, and stress removal, it is ionized and placed in an electroless nickel plating solution to electrolessly plate a layer of nickel conductive surface layer. The thickness of the conductive surface layer is 0.1-3 μm. The polyethylene foam material treated by this method is used as the cathode and placed in the electroplating tank of the anhydrous organic alkyl aluminum electrolyte, and the industrial pure aluminum plate is used as the anode, and the aluminum is electrodeposited by the pulse electroplating method. The electroplating tank of the anhydrous organic alkyl aluminum electrolyte contains 225 parts of triethylaluminum, 50 parts of KF, 160 parts of toluene and ethylbenzene, 4, 4`diamino-3,3`dimethyloxydiphenyl 5 parts of methane; the temperature of the plating solution is controlled at 60-80°C; the electrodeposition time is...

Embodiment 3

[0048] Polypropylene foam is selected as the base material, with an average pore diameter of 3.40mm and a porosity of 96%. Pretreatment with the method of coating conductive adhesive. The polypropylene foam material after this conductive treatment is used as the cathode and placed in the electroplating tank of the anhydrous organic alkyl aluminum electrolyte, and the industrial pure aluminum plate is used as the anode, and the aluminum is electrodeposited by the pulse electroplating method. The electroplating tank of the anhydrous organic alkyl aluminum electrolyte contains 300 parts of triethylaluminum, 40 parts of NaF, 20 parts of CaF, 3 parts of 4,4`diamino-3,3`dimethyloxydiphenylmethane, 420 parts of ethylbenzene; the temperature of the plating solution is controlled at 50-80°C; the electrodeposition time is 2 hours.

[0049] The electroplating tank uses a traditional Watt electroplating tank. The electroplating power supply is a pulsed DC power supply. The current wave...

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Abstract

The preparation process of foamed aluminum includes the following operation steps: the pre-treatment of foamed base material via deoiling, degreasing and eliminating stress; and the electroplating deposition of aluminum on the conducting treated base material inside electrolyzer with anhydrous organic alkyl aluminum electrolyte and industrial pure aluminum plate as anode. The electroplation is one pulse electrolysis process with pulse DC power source of squared, triangular or sinusoidal waveform, electrolyte temperature 50-95 deg.c, deposition period 1-2 hr, peak current 10-200 A, bread-make ratio of 0.01-1 and pulse frequency 15-2000 Hz. Compared with available technology, the present invention has the advantages of stable foamed aluminum structure, easy controlled production process, fine and homogeneous pores, high porosity, high product quality and low cost. The foamed aluminum may be further heat treated for raised strength and toughness.

Description

technical field [0001] The invention relates to a process for producing foamed aluminum, in particular to a method for preparing through-hole foamed aluminum with small, uniform and high porosity. Background technique [0002] At present, aluminum foam is a relatively common material among porous metal foams with good application prospects. It is a structural functional material that uses the physical properties of the metal surface to produce special effects. Because of its special structure, its application fields involve several important fields of material structure and physics. Structural applications are mainly in various industries such as automobiles, aerospace, and construction; functional applications include: damping internal friction, acoustics, thermal physics, flow in porous media, electromagnetics, etc. [0003] Porous metal foam has a history of more than 50 years. It was first prepared by foaming method. Due to the difficulty in controlling the process of f...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C21/00C25D1/08
Inventor 孙伟成
Owner 孙伟成
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