Preparation method of porous metal film
A porous metal, metal powder technology, applied in separation methods, chemical instruments and methods, membrane technology and other directions, can solve the requirements of corrosion resistance and mechanical properties are very strict, affect the corrosion resistance and mechanical properties of porous metal membranes, powder slurry Excessive or insufficient problems, to achieve excellent corrosion resistance and mechanical properties, good surface quality, avoid excessive or insufficient effect
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Embodiment 1
[0032] Preparation of 316L stainless steel porous membrane:
[0033] Step 1, mixing the dispersant and the organic solvent uniformly at a volume ratio of 1:10 to obtain a mixed solution; the dispersant is terpineol; the organic solvent is ethanol;
[0034] Step 2. Mix the 316L stainless steel powder with an average particle size of 5 μm and the mixed solution described in step 1 in a mass ratio of 1:3 to obtain a slurry;
[0035] Step 3. Use a spray gun to spray the slurry described in step 2 onto a porous metal substrate (a 316L stainless steel tube with a specification of Ф60mm×1000mm, the maximum aperture D max =30μm) surface, control the spraying pressure to 0.6MPa, the spraying distance to 200mm, and the spraying volume to 108mL / min, then place the porous metal substrate sprayed with the slurry in a drying oven and dry it for 1h at a temperature of 50°C , and then put the dried porous metal substrate in a sintering furnace, in a hydrogen atmosphere, raise the temperature...
Embodiment 2
[0038] Preparation of Inconel 600 nickel alloy porous membrane:
[0039] Step 1, mixing the dispersant and the organic solvent uniformly at a volume ratio of 1:4 to obtain a mixed solution; the dispersant is terpineol; the organic solvent is isopropanol;
[0040] Step 2, mixing Inconel 600 nickel alloy powder with an average particle size of 6 μm with the mixed solution described in step 1 in a mass ratio of 1:2 to obtain a slurry;
[0041] Step 3. Use a spray gun to spray the slurry described in step 2 onto the porous metal substrate (the specification is Ф50mm×1000mm 316L stainless steel pipe, the maximum hole diameter is D max =20μm), control the spraying pressure to 0.5MPa, the spraying distance to 200mm, and the spraying volume to 72mL / min, then place the porous metal substrate sprayed with the slurry in a drying oven and dry it at a temperature of 70°C 1h, then place the dried porous metal substrate in a sintering furnace, under an inert atmosphere, raise the temperatur...
Embodiment 3
[0044] Preparation of 304L stainless steel porous membrane:
[0045] Step 1, mixing the dispersant and the organic solvent uniformly at a volume ratio of 1:3 to obtain a mixed solution; the dispersant is ethylene glycol; the organic solvent is methanol;
[0046] Step 2. Mix the 304L stainless steel powder with an average particle size of 4.5 μm and the mixed solution described in step 1 in a mass ratio of 1:5 to obtain a slurry;
[0047] Step 3. Use a spray gun to spray the slurry described in step 2 onto a porous metal substrate (316L stainless steel plate with a specification of 300mm×300mm×2.5mm, the maximum pore diameter is D max =10μm) surface, control the spraying pressure to 0.5MPa, the spraying distance to 150mm, and the spraying volume to 36mL / min, then place the porous metal substrate sprayed with the slurry in a drying oven and dry it for 1h at a temperature of 80°C , and then put the dried porous metal substrate in a sintering furnace, in a nitrogen atmosphere, ra...
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