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Sintered metal fiber felt separation net and preparation method thereof

A technology of metal fiber and sintered felt, which is applied in the direction of metal material coating process, superimposed layer plating, coating, etc., can solve the problems of low deposition efficiency, poor coating bonding strength and high cost, and achieves simple preparation process, high cost, etc. The effect of high preparation efficiency and long service life

Active Publication Date: 2014-05-07
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low deposition efficiency of plasma spraying and the difficulty in controlling the coating thickness, precise manipulator program control is required, so the cost is generally high
The cost of the latter is generally lower, but the bonding strength of the coating is poor, and it is easy to peel off in a large area and pollute the sintered felt.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Firstly, a stainless steel wire mesh with a mesh size of 10 mesh and a wire diameter of 0.2 mm is hot-dip aluminized to obtain a metal aluminum coating with a thickness of 25 μm. Hot-dip plating temperature is 690 o C, the immersion plating time is 3min.

[0015] (2) The stainless steel wire mesh after hot-dip aluminizing is 60 o HNO of C 3 ,H 3 PO 4 ,H 2 O mixed solution (volume ratio 1:1:1) was acid-washed, then rinsed with deionized water and cooled to room temperature.

[0016] (3) Ultrasonic cleaning the cleaned screen in acetone solution for 5 min.

[0017] (4) The stainless steel wire mesh is placed in the micro-arc oxidation electrolytic cell and connected to the anode. The power supply adopts AC pulse power supply, and the electrolyte is NaOH (or KOH, 0.08mol / l), Na 2 SiO 3 (15g / l) in deionized water. The control voltage is 350V, and the current density is 3A / dm 2 ,. Electrolyte temperature is controlled at 30 o C, the oxidation time is control...

Embodiment 2

[0020] (1) First, hot-dip aluminized stainless steel wire mesh with a mesh size of 16 mesh and a wire diameter of 0.22 mm to obtain a metal aluminum coating with a thickness of 28 μm. Hot-dip plating temperature is 720 o C, the immersion plating time is 5min.

[0021] (2) The stainless steel wire mesh after hot-dip aluminizing is 60 o HNO of C 3 ,H 3 PO 4 ,H 2 O mixed solution (volume ratio 1:1:1) was acid-washed, then rinsed with deionized water and cooled to room temperature.

[0022] (3) Ultrasonic cleaning the cleaned screen in acetone solution for 10 min.

[0023] (4) The stainless steel wire mesh is placed in the micro-arc oxidation electrolytic cell and connected to the anode. The power supply adopts AC pulse power supply, and the electrolyte is NaOH (or KOH, 0.12 mol / l), NaOH 2 SiO 3 (20g / l) in deionized water. The control voltage is 350~550V, and the current density is 4.5A / dm 2 ,. Electrolyte temperature is controlled at 40 o C, the oxidation time is con...

Embodiment 3

[0026] (1) First, hot-dip aluminized stainless steel wire mesh with a mesh size of 10-50 mesh and a wire diameter of 0.4 mm to obtain a metal aluminum coating with a thickness of 25 μm. The aluminum material used is >=99% industrial grade pure aluminum (main impurities Cuo C, the immersion plating time is 8min.

[0027] (2) The stainless steel wire mesh after hot-dip aluminizing is 60 o HNO of C 3 ,H 3 PO 4 ,H 2 O mixed solution (volume ratio 1:1:1) was acid-washed, then rinsed with deionized water and cooled to room temperature.

[0028] (3) Ultrasonic cleaning the cleaned screen in acetone solution for 5~30min.

[0029] (4) The stainless steel wire mesh is placed in the micro-arc oxidation electrolytic cell and connected to the anode. The power supply adopts AC pulse power supply, and the electrolyte is NaOH (or KOH, 0.25 mol / l), NaOH 2 SiO 3 (40g / l) in deionized water. Control voltage is 450V, current density is 5A / dm 2 ,. Electrolyte temperature is controlled at...

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Abstract

The invention relates to a sintered metal fiber felt separation net and a preparation method thereof. According to the separation net, a stainless steel screen with the net pore size of 10-50 meshes and the wire diameter of 0.1-5mm is used as a base net, and an aluminum oxide ceramic coating of 20-25mu m in thickness is coated on the base net through hot dip aluminum plating and micro-arc oxidation. The separation net is used for separating two layers of metal fiber felts in the vacuum sintering process. The separation net is reasonable in structure, simple in preparation process, low in cost, high in binding force of an in-situ Al2O3 ceramic coating on the separation net, and long in service life, and is an ideal sintered metal fiber felt separation net and a preparation method of the separation net. The process is high in preparation efficiency and applicable to industrial production.

Description

technical field [0001] The invention relates to a filter material and a preparation method thereof, in particular to a metal fiber sintered felt isolation net and a preparation method thereof. Background technique [0002] Metal fiber sintered felt has a series of excellent characteristics such as high porosity, high dirt holding capacity, corrosion resistance, high temperature resistance, good toughness and mechanical properties, so it has great potential in polymer melt, viscose filtration, high temperature gas filtration and other industries. Wide range of applications. Especially in strong alkaline corrosion environment and high temperature environment (200~600 o C) plays an irreplaceable role in other filter media. In addition, in recent years, researchers at home and abroad have made new research on the application of metal fiber sintered felts, such as seawater desalination, oil-vapor separation, gas-liquid separation, electrode materials, catalyst carriers, sound-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00
Inventor 张涛温广武宋亮黄小萧钟博夏龙
Owner HARBIN INST OF TECH AT WEIHAI
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