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Preparing method of aluminum alloy surface colorful ceramic film

A technology of aluminum alloy surface and ceramic film layer, which is applied in the direction of anodic oxidation, etc., can solve the problem of single color of the ceramic film layer on the aluminum alloy surface, and achieve the effect of omitting the painting process, simple process and high efficiency

Inactive Publication Date: 2016-04-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of monotonous color of the ceramic film on the surface of aluminum alloy prepared by micro-arc oxidation, the purpose of the present invention is to provide a method for preparing a colored ceramic film on the surface of aluminum alloy. Coloring salt and by controlling the experimental conditions to obtain ceramic coatings on the surface of aluminum alloys with different series of colors, the preparation process is simple

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Put the 5052 aluminum alloy in the degreasing solution at 60°C for 1 minute, take out the 5052 aluminum alloy, clean it with deionized water, and dry it with a hair dryer;

[0026] Step 2: Prepare NaH 2 PO 4 Concentration 0.5mol / L, NaF concentration 0.5mol / L, NH 4 F concentration is 0.1mol / L, Na 2 B 4 o 7 The concentration is 0.1mol / L and Co(OH) 2 Electrolyte solution with a concentration of 1.0g / L, and adding ammonia water to promote Co(OH) 2 fully dissolved;

[0027] Step 3: The 5052 aluminum alloy in step 1 is used as the anode, the electrolyte prepared in step 2 is the electrolyte, the stainless steel container is used as the cathode, and the micro-arc oxidation reaction is carried out at a voltage of 140V. When the monitored current is 0.5A, the reaction ends, and the obtained Blue aluminum alloy surface ceramic coating.

Embodiment 2

[0029] Step 1: Put the 5052 aluminum alloy in the degreasing solution at 60°C for 1 minute, take out the 5052 aluminum alloy, clean it with deionized water, and dry it with a hair dryer;

[0030] Step 2: Prepare NaH 2 PO 4 Concentration 0.5mol / L, NaF concentration 0.5mol / L, NH 4 F concentration is 0.1mol / L, Na 2 B 4 o 7 The concentration is 0.1mol / L and Na 2 MoO 4 Electrolyte with a concentration of 15g / L;

[0031] Step 3: The 5052 aluminum alloy in step 1 is used as the anode, the electrolyte prepared in step 2 is the electrolyte, the stainless steel container is used as the cathode, and the micro-arc oxidation reaction is carried out at a voltage of 155V. When the monitored current is 0.5A, the reaction ends, and the obtained Ceramic coating on dark gray aluminum alloy surface.

Embodiment 3

[0033] Step 1: Put the 5052 aluminum alloy in the degreasing solution at 60°C for 1 minute, take out the 5052 aluminum alloy, clean it with deionized water, and dry it with a hair dryer;

[0034] Step 2: Prepare NaH 2 PO 4 Concentration 0.5mol / L, NaF concentration 0.5mol / L, NH 4 F concentration is 0.1mol / L, Na 2 B 4 o 7 The concentration is 0.1mol / L and KMnO 4 Electrolyte with a concentration of 2.5g / L;

[0035] Step 3: The 5052 aluminum alloy in step 1 is used as the anode, the electrolyte prepared in step 2 is the electrolyte, the stainless steel container is used as the cathode, and the micro-arc oxidation reaction is carried out at a voltage of 125V. When the monitored current is 0.5A, the reaction ends, and the obtained Ocher red aluminum alloy surface ceramic coating.

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Abstract

The invention particularly relates to a method for preparing an aluminum alloy surface colorful ceramic film through a micro-arc oxidation method, and belongs to the technical field of surface treatment. The method comprises the steps that firstly, dirt removing and oil removing treatment is carried out on the surface of an aluminum alloy base body, cleaning is thorough, and drying is carried out; secondly, an electrolyte containing NaH2PO4, NaF, NH4F, Na2B4O7 and a coloring agent is prepared; and thirdly, the aluminum alloy base body in the first step serves as an anode, the electrolyte prepared in the second step serves as the electrolyte, a corresponding cathode is arranged, the micro-arc oxidation reaction is conducted under the voltage of 125-155 V, and when it is monitored that the current is smaller than 0.5 A, the reaction is over, and the aluminum alloy surface colorful ceramic film is obtained. The method is simple in technology, the later paint spraying treatment technology is omitted, efficiency is high, and cost is low.

Description

technical field [0001] The invention relates to a method for preparing a colored ceramic film on the surface of an aluminum alloy, in particular to a micro-arc oxidation method for preparing a colored ceramic film on the surface of an aluminum alloy, and belongs to the technical field of surface treatment. Background technique [0002] Applying ceramic coating on the surface of metals and alloys can replace precious metals and alloys with cheap metal materials on the premise of ensuring the performance of the original metal materials. The scope of application, and the use of machinable materials as the substrate for surface ceramic treatment can improve the machinability of ceramic materials. Among many kinds of metals and alloys, the research of surface ceramic coating with aluminum and aluminum alloys as substrates has become a hot spot, because of its wide source, high specific strength, good plasticity, good formability, low density, Good thermal and electrical conducti...

Claims

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Application Information

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IPC IPC(8): C25D11/06C25D11/14
CPCC25D11/06C25D11/14
Inventor 陈为为陈超张玉平王鲁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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