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A kind of method for modifying the surface of metal cerium

A metal cerium modification technology, applied in the field of metal cerium surface modification, metal cerium surface nitriding and coating treatment to improve its anti-aging and corrosion performance, can solve the problem of affecting metal characteristics and surface appearance quality, easy oxidation corrosion, storage Unsatisfactory effect and other problems, to achieve the effect of increasing the surface aesthetics and enhancing the anti-aging and corrosion performance

Active Publication Date: 2019-07-12
TSINGHUA UNIV
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Problems solved by technology

[0003] However, due to the very active chemical properties of metal cerium, it is easy to oxidize and corrode at room temperature, and it will quickly lose its luster and age under atmospheric conditions, thus affecting its metal properties and surface appearance quality.
At present, the method of sealing metal cerium and storing it in a cool or kerosene medium is mainly used to passively slow down the oxidation and corrosion of metal cerium, but these methods require high air tightness, are easy to pollute metal cerium, and the storage effect is not ideal , metal cerium will still undergo serious oxidation corrosion

Method used

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  • A kind of method for modifying the surface of metal cerium
  • A kind of method for modifying the surface of metal cerium
  • A kind of method for modifying the surface of metal cerium

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Embodiment 1

[0029] 1) The metal cerium sample (10mm×10mm×3mm) that has been polished, polished and ultrasonically cleaned is immediately placed on the substrate stage in the vacuum chamber of the dual ion beam sputtering deposition system, and the chamber is closed for vacuuming;

[0030] 2) The background vacuum reaches 8.5×10 -5 After Pa, the auxiliary source is fed with argon gas, the flow rate is 5 sccm, and the working gas pressure is 0.9×10 -2 Pa, the working parameters are auxiliary source ion energy 600eV (electron volts), beam current 35mA, the metal cerium sample is sputtered and cleaned for 15 minutes, and then the auxiliary source is stopped;

[0031] 3) The main source is connected with argon gas, the flow rate is 7sccm, and the working gas pressure is 1.5×10 -2 Pa, the working parameters are argon ion energy 2500eV, beam current 80mA, sputtering and cleaning the pre-polished and polished high-purity metal cerium target, preparing for reactive sputtering, and stopping the ma...

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Abstract

The invention discloses a method for modifying a surface of metal cerium, and belongs to the technical field of corrosion protection of rare earth metal. The method uses a double-ion beam sputtering deposition system for firstly performing the argon ion sputtering cleaning on the surface of the polished metal cerium; then, a cerium nitride plating layer is generated by the nitriding reaction sputtering treatmenet; finally, a ceramic target, such as titanium nitride is used for directly sputtering to generate a titanium nitride ceramic plating layer; and finally, a cerium nitride and titanium nitride composite double-layer plating layer is formed on the cerium surface. As the nitriding treatment is performed for the metal cerium, and the titanium nitride plating layer is deposited, the aging and corrosion resistance of the metal cerium is obviously improved; electrochemical polarization curve tests indicate that the corrosion current density of the metal cerium before and after the treatment can be reduced by a bout 5 times; and meanwhile, the cerium nitride and titanium nitride plating layers are both golden yellow plating layers, so that the surface beauty effect of the metal cerium is improved.

Description

technical field [0001] The invention relates to a method for modifying the surface of metal cerium, in particular to a method for improving the anti-aging and corrosion performance of the metal cerium surface by nitriding and coating treatment, and belongs to the technical field of rare earth metal corrosion protection. Background technique [0002] As an important rare earth element, metal cerium is often used as reducing agent, catalyst and alloy additive, and has important and extensive uses in modern industry. [0003] However, due to the very active chemical properties of metal cerium, it is easy to oxidize and corrode at room temperature, and it will quickly lose its luster and age under atmospheric conditions, thus affecting its metal properties and surface appearance quality. At present, the method of sealing metal cerium and storing it in a cool or kerosene medium is mainly used to passively slow down the oxidation and corrosion of metal cerium, but these methods re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/06C23C8/36C23C14/46C23C28/04
CPCC23C8/36C23C14/0641C23C14/46C23C28/04
Inventor 张政军梁威刘柯钊胡殷陈志磊陈丽敏
Owner TSINGHUA UNIV
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