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Method for pretreating surface of metal (cerium) substrate

A treatment method, the technology of metal cerium, applied in the direction of anodic oxidation, etc., can solve the problems of inability to protect metal cerium substrate, poor bonding force between coating and metal cerium substrate, complex oxide film structure, etc., and achieve good bonding force, electrochemical The effect of high stability and low vapor pressure

Active Publication Date: 2015-03-25
CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The structure of the oxide film on the surface of metal cerium is complex. At present, the surface pretreatment method is usually used to isolate the air in kerosene, but this method can only remove the oxide film on the surface initially, and it cannot be completely removed. Secondary oxidation occurs before the formation, resulting in poor bonding between the coating and the metal cerium substrate, the coating is easy to fall off, and cannot provide good corrosion protection for the metal cerium substrate

Method used

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  • Method for pretreating surface of metal (cerium) substrate
  • Method for pretreating surface of metal (cerium) substrate
  • Method for pretreating surface of metal (cerium) substrate

Examples

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Embodiment 1

[0040] (1) Grinding

[0041] The metal Ce sheet (purity 99.9wt%) is isolated from the air in the vacuum pump oil, and then polished with 220#, 320#, 400#, 600#, 800#, 1000#, 2000# abrasive paper to initially remove the surface of the cerium substrate The oxide layer and the carbonized layer produced during the wire cutting process make it reveal a silvery metallic luster; after polishing, it is ultrasonically cleaned in acetone for 10 minutes, and dried with cold air.

[0042] (2) Anodizing treatment

[0043] Immerse the metal Ce sheet treated in step (1) in the activation solution for anodic oxidation treatment, use the metal Ce sheet as the anode, and use the Al sheet with a purity of 99.9wt% as the cathode; the activation solution is prepared by the following method: A small amount of anhydrous aluminum chloride is added to disubstituted imidazole chloride (1-methyl-3 ethyl imidazole chloride) several times to form a disubstituted imidazole chloride-aluminum chloride ionic...

Embodiment 2

[0052] (1) Grinding

[0053] The metal Ce sheet (purity 99.9wt%) is isolated from the air in the vacuum pump oil, and then polished with 220#, 320#, 400#, 600#, 800#, 1000#, 2000# abrasive paper to initially remove the surface of the cerium substrate The oxide layer and the carbonized layer produced during the wire cutting process make it reveal a silvery metallic luster; after polishing, clean it ultrasonically in absolute ethanol for 10 minutes, and dry it with cold air.

[0054] (2) Anodizing treatment

[0055] Immerse the metal Ce sheet treated in step (1) in the activation solution for anodic oxidation treatment, use the metal Ce sheet as the anode, and use the Al sheet with a purity of 99.9wt% as the cathode; the activation solution is prepared by the following method: A small amount of anhydrous aluminum chloride is added to disubstituted imidazole chloride (1-ethyl-3 methylimidazole chloride) several times to form a disubstituted imidazole chloride-aluminum chloride i...

Embodiment 3

[0064] (1) Grinding

[0065] The metal Ce sheet (purity 99.9wt%) is isolated from the air in the vacuum pump oil, and then polished with 220#, 320#, 400#, 600#, 800#, 1000#, 2000# abrasive paper to initially remove the surface of the cerium substrate The oxide layer and the carbonized layer produced during the wire cutting process make it reveal a silvery metallic luster; after polishing, clean it ultrasonically in absolute ethanol for 10 minutes, and dry it with cold air.

[0066] (2) Anodizing treatment

[0067] Immerse the metal Ce sheet treated in step (1) in the activation solution for anodic oxidation treatment, use the metal Ce sheet as the anode, and use the Al sheet with a purity of 99.9wt% as the cathode; the activation solution is prepared by the following method: A small amount of anhydrous aluminum chloride is added to disubstituted imidazole chloride (1-ethyl-3 methylimidazole chloride) several times to form a disubstituted imidazole chloride-aluminum chloride i...

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Abstract

The invention discloses a method for pretreating the surface of a metal (cerium) substrate. The method comprises the following steps: firstly, grinding the cerium substrate, cleaning ultrasonically, and blow-drying; then soaking the cerium substrate into an activation solution, and anodizing for 10-30 minutes by adopting a two-electrode system with the cerium substrate serving as an anode and 99.9wt% of Al serving as a cathode, wherein the activation solution is prepared from disubstituted imidazole chloride and AlCl3 at a molar ratio of 1:(1-4), the temperature of the activation solution is 15-80 DEG C, and the current density is 20-40mA / cm<2>; rinsing the cerium substrate in the activation solution after finishing anodizing; and finally wiping the cerium substrate until the surface of the cerium substrate shows metallic luster. By adopting the method for pretreating the surface of the cerium substrate, a clean cerium substrate surface without an oxide coating can be obtained so that various coatings with good binding force can be applied on the surface of the cerium substrate. In addition, the method consumes less energy, can not cause pollution to environment and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, in particular to a surface pretreatment method for metal cerium. Background technique [0002] As we all know, metal cerium (Ce), as the most abundant rare earth element, has unique physical and chemical properties. It has a wide range of applications in the field of protection and industrial fields such as steel, non-ferrous metals and their alloys, pyrotechnic alloys, permanent magnetic materials, and hydrogen storage materials. More importantly, as one of the most chemically active metal elements among the lanthanides, cerium has physical and chemical properties close to those of radioactive elements plutonium and uranium, and is one of the important simulation research materials in the field of nuclear energy. [0003] However, metallic Ce is extremely active, prone to oxidation in the air, and prone to corrosion in humid environments, that is, poor corrosion resistance, which seve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34
CPCC25D11/34
Inventor 廖成丁晶晶江奕东梅军刘焕明
Owner CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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