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Method for preparing nanometer CeO2/Zn (cerium oxide/zinc) metal-based composite material in zinc galvanizing layer

A composite material and metal-based technology, applied in the field of alloy cast iron casting, can solve the problems of reducing the corrosion rate of the coating, etc., and achieve the effect of easy large-scale industrial application, stable performance and low cost

Inactive Publication Date: 2015-04-29
QINGDAO HEDELONG MACHINERY
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  • Summary
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AI Technical Summary

Problems solved by technology

However, rare earth elements are not enough to reduce the corrosion rate of the coating compared with people's expectations, so this process has not been widely used in production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Pure Zn powder with a particle size of 47-100 μm and Zn powder with an average particle size of 30 nm CeO The powders were mixed at a weight ratio (wt%) of 8:1, and ball milled in a self-made high-energy ball mill. 3mm, 6mm and 10mm stainless steel balls are used as the ball milling medium, the ratio of the three kinds of steel balls is 3:6:10, and the ball material ratio (wt%) is 30:1; vacuumize before ball milling, and then in the state of argon protection The mixed powder was ball milled at a speed of 120 r / min, and samples were taken after different periods of time.

[0019] Hot pressing process parameters

[0020] Zn—CeO2 (0.1%): 1 450 r / min 2 h; 9 t 2 h 370°C 6°C / min closed

[0021] Zn—CeO , (1%): 1 450 r / min 2h; 9 t 2 h 370°C 6°C / min closed

[0022] Zn—CeO , (5%): 1 450 r / min 2h; 9 t 2 h 370°C 6°C / min closed

[0023] Hot-pressing equipment: The equipment used in this test is a vacuum hot-pressing furnace, which is a vertical vacuum resistance furnace ...

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Abstract

The invention discloses a method for preparing a nanometer CeO2 / Zn (cerium oxide / zinc) metal-based composite material in a zinc galvanizing layer. The method comprises the following steps of mixing a pure Zn powder with granularity of 47-100m and a CeO powder with average granularity of 30nm according to the weight ratio of 8:1 (wt%), and performing ball milling in a self high-efficiency ball milling machine; using stainless steel balls with diameters of 3mm, 6mm and 10mm as ball milling mediums, wherein the proportion of the three types of steel balls is 3:6:10, and the ratio of ball materials is 30:1 (wt%); before ball milling, sucking vacuum, performing ball milling on the mixed powder under the argon protecting state, setting the rotation speed of the ball milling machine as 120r / min, and sampling after different times. The method has the advantages that the high-efficiency ball milling and the powder metallurgical sintering are the effective methods for preparing the nanometer CeO2 / Zn composite material; after detecting by XRD (X-ray diffraction) and FESEM (field emission scanning electron microscopy), the new alloy phase is not generated in the ball milling and hot pressing sintering processes, namely that the nanometer CeO2 / Zn and Al composite material is obtained; the structure is uniform, and the property is stable.

Description

[0001] technical field [0002] The invention belongs to the technical field of alloy cast iron casting, and in particular relates to a nanometer CeO2 / Zn metal-based composite material used in zinc coating. [0003] Background technique [0004] Zinc coating has been used to prevent the corrosion of steel products for more than 200 years. So far, it still plays an important role in the anti-corrosion coating of steel materials. The service life of the zinc coating depends on the corrosion resistance of the coating, the stronger the corrosion resistance of the coating, the longer the service life of the coating. With the ever-growing needs of technology and economy, how to better improve the corrosion resistance of the coating puts forward higher requirements for the coating material. With the development and research of rare earth materials, people gradually realize their superiority and apply them in different fields. In the 1980s, Hinton and Wilson first studied the co...

Claims

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Application Information

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IPC IPC(8): B22F9/04B82Y40/00C23C2/06
Inventor 常云青
Owner QINGDAO HEDELONG MACHINERY
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