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Preparation method of anti-corrosion coating on the surface of 310/316 stainless steel fiber sintered felt

A technology for sintering felt and steel fibers, applied in fiber processing, separation methods, chemical instruments and methods, etc., can solve the problems of easy corrosion and short service life, and achieve improved corrosion resistance, good air permeability, and high filtration accuracy. Effect

Active Publication Date: 2015-09-02
SHENZHEN FISHER NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of the existing metal fiber sintered mats that are easily corroded and have a short service life, and propose a FeCrAl fiber sintered mat with strong corrosion resistance and a surface of 310 / 316 stainless steel fiber sintered felt How to make an anti-corrosion coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0030] Prepare an aluminum sol coating solution with a solid content of 20%.

[0031] The FeCrAl fiber sintered felt was immersed in the above-prepared aluminum sol coating solution at a rate of 20cm / min, and then lifted out of the solution at a rate of 20cm / min. The lifting instrument adopts PZ-SD-04 of Shanghai Renzhong Instrument Electric Co., Ltd. Frequency conversion speed power supply.

[0032] Place the above conventional dissolving FeCrAl fiber sintered felt in a vacuum container to evacuate to drive out bubbles in the coating for 20 minutes. The instrument uses a 2XZ-type rotary vane vacuum pump from Shanghai Vacuum Pump Factory Co., Ltd.

[0033] Put the FeCrAl fiber sintered felt treated by the above method into a muffle furnace, heat up to 650℃, keep it for 2 hours, and form a stable γ-Al on the surface 2 O 3 membrane. The instrument used Nabertherm Industrial Furnaos Ltd, CO's LH60 / 13 muffle furnace.

preparation Embodiment 2

[0035] Prepare an aluminum sol coating solution with a solid content of 23%.

[0036] The FeCrAl fiber sintered felt was immersed in the above-prepared aluminum sol coating solution at a rate of 30cm / min, and then lifted out of the solution at a rate of 30cm / min. The lifting instrument was PZ-SD-04 made by Shanghai Renzhong Instrument Electric Co., Ltd. Frequency conversion speed power supply.

[0037] Place the above-mentioned conventionally-dissolved FeCrAl fiber sintered felt in a vacuum container to evacuate to drive out bubbles in the coating for 25 minutes. The instrument uses a 2XZ-type rotary vane vacuum pump from Shanghai Vacuum Pump Factory Co., Ltd.

[0038] Put the FeCrAl fiber sintered felt treated by the above method into a muffle furnace, heat up to 630°C, keep it for 2.5 hours, and form a stable γ-Al on the surface 2 O 3 membrane. The instrument used Nabertherm Industrial Furnaos Ltd, CO's LH60 / 13 muffle furnace.

preparation Embodiment 3

[0040] Prepare an aluminum sol coating solution with a solid content of 25%.

[0041] The FeCrAl fiber sintered felt was immersed in the above-prepared aluminum sol coating solution at a rate of 40cm / min, and then lifted out of the solution at a rate of 40cm / min. The lifting instrument adopts PZ-SD-04 of Shanghai Renzhong Instrument Electric Co., Ltd. Frequency conversion speed power supply.

[0042] Place the above-mentioned conventional dissolving FeCrAl fiber sintered felt in a vacuum container to evacuate to drive out bubbles in the coating for 30 minutes. The instrument uses a 2XZ-type rotary vane vacuum pump from Shanghai Vacuum Pump Factory Co., Ltd.

[0043] Put the FeCrAl fiber sintered felt treated by the above method into a muffle furnace, raise it to 650℃ at a certain heating rate, and keep it for 3 hours to form a stable γ-Al on the surface 2 O 3 membrane. The instrument used Nabertherm Industrial Furnaos Ltd, CO's LH60 / 13 muffle furnace.

[0044] Γ-Al mentioned above 2 ...

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Abstract

The invention discloses a manufacturing method of an anti-corrosion coating on the surface of a FeCrAl fiber sintered felt. The manufacturing method comprises the following steps: step 1) preparing an aluminum sol coating solution, wherein the solid content in aluminum sol is 20%-25%; step 2) immersing the FeCrAl fiber sintered felt into the well prepared aluminum sol coating solution at the rate of 10-50cm / min, and further extracting from the solution at the rate of 10-50cm / min; step 3) placing the immersed FeCrAl fiber sintered felt into a vacuum container for vacuumizing, and expelling bubbles in the coating for 20-30 minutes; and step 4) placing the FeCrAl fiber sintered felt into a Muffle furnace, increasing the temperature to 600-650 DEG C, preserving the temperature for 2-3 hours, and forming a stable gamma-Al2O3 film coating on the surface of the FeCrAl fiber sintered felt. The coating manufactured by the method disclosed by the invention has stronger corrosion resistance.

Description

Technical field [0001] The invention relates to a method for manufacturing a corrosion-resistant coating on the surface of a metal fiber sintered felt, in particular to a method for manufacturing a corrosion-resistant coating on the surface of the FeCrAl fiber sintered felt and 310 / 316 stainless steel fiber sintered felt. Background technique [0002] Metal fiber sintered felt is made of metal fibers with a diameter of micrometers through non-woven laying, stacking and high temperature sintering. The multi-layer metal fiber felt is composed of metal fiber layers with different pore diameters to form a composite body with a certain gradient, which can be controlled to obtain extremely high filtration accuracy and a larger dirt holding capacity than single-layer felt. The metal fiber sintered felt effectively overcomes the shortcomings of easy blockage and fragility of the metal mesh, makes up for the shortcomings of fragile powder filter products and small flow, overcomes the defe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/45D06M11/79D06M15/256D06M15/277B01D39/20B01D53/94B01J32/00B01J37/02B01J23/86
Inventor 吴勘
Owner SHENZHEN FISHER NEW MATERIALS CO LTD
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