A kind of molten zinc-aluminum corrosion-resistant coating material without sealing agent and preparation method thereof
A corrosion-resistant coating and fusion-resistant technology, which is applied in coating, fusion spraying, metal material coating process, etc.
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[0023] The embodiment of the present invention provides a preparation method of a molten zinc-aluminum corrosion-resistant coating material free of sealing agent, which is used to prepare the coating material of the present invention, comprising the following steps:
[0024] Step 1: Using the material for preparing cermet powder and the whiskers of the melting-zinc erosion-resistant material as raw materials, wherein the whiskers of the melting-zinc erosion-resistant material account for 0.5-2% of the total weight of the raw materials, and the rest is used to prepare the cermet Raw material for powder;
[0025] Step 2: Add deionized water to the raw materials in the above step 1 to make a wet grinding medium, add polyvinyl alcohol or polyethylene glycol accounting for 1 to 6% of the total weight of the raw materials as a binder, and ball mill for 12 to 48 hours to prepare get mixed slurry;
[0026] Step 3: The mixed slurry prepared in the above step 2 is spray-dried to obtain...
Embodiment 1
[0036] The embodiment of the present invention provides a method for preparing a molten zinc-aluminum corrosion-resistant coating material without a sealing agent. The prepared cermet powder is WC-12Co thermal spray powder, which includes the following steps:
[0037] 1) Take 87kg of WC powder, 1kg of aluminum borate whiskers, 12kg of cobalt powder, the particle size of WC powder is 1-3μm, the diameter of aluminum borate whiskers is 0.5-1μm, the length is 3-8μm, and the particle size of cobalt powder is 1.5μm;
[0038] 2) Add deionized water to the above raw materials to make a wet grinding medium, add 2 kg of polyvinyl alcohol as a binder, and ball mill for 24 hours to prepare a mixed slurry;
[0039] 3) Agglomerated particles were obtained by spray-drying the above-mentioned mixed slurry; wherein, the inlet temperature of the centrifugal spray drying equipment was 220°C, the outlet temperature was 110°C, the rotation speed of the atomizing disc was 10000r / min, and the feeding...
Embodiment 2
[0043] The embodiment of the present invention provides a method for preparing a molten zinc-aluminum corrosion-resistant coating material without a sealing agent. The prepared cermet powder is WC-WB-Co thermal spray powder, which includes the following steps:
[0044]1) Take WC powder 59.5kg, WB powder 29.5kg, aluminum borate whisker 1kg, cobalt powder 10kg, WC powder particle size is 1-3μm, WB powder particle size is 1-5μm, aluminum borate whisker diameter is 1-2μm, length 5-15μm, the particle size of cobalt powder is 1.5μm;
[0045] 2) Add deionized water to the above raw materials to make a wet grinding medium, add 2.4 kg of polyethylene glycol as a binder, and ball mill for 30 hours to prepare a mixed slurry;
[0046] 3) Agglomerated particles were obtained by spray-drying the above-mentioned mixed slurry; wherein, the inlet temperature of the centrifugal spray drying equipment was 220°C, the outlet temperature was 110°C, the rotation speed of the atomizing disc was 12000...
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Abstract
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