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Method for improving corrosion resistance of ZL303 aluminum alloy film

A ZL303, corrosion resistance technology, applied in the field of improving the corrosion resistance of the ZL303 aluminum alloy film layer, can solve the problems of ZL303 aluminum alloy micro-arc oxidation without research, achieve high thickness and hardness, improve corrosion resistance, and increase thickness and the effect of hardness

Inactive Publication Date: 2015-05-27
罗伟
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Problems solved by technology

But there is no research on micro-arc oxidation of ZL303 aluminum alloy

Method used

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  • Method for improving corrosion resistance of ZL303 aluminum alloy film
  • Method for improving corrosion resistance of ZL303 aluminum alloy film
  • Method for improving corrosion resistance of ZL303 aluminum alloy film

Examples

Experimental program
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Embodiment

[0016] The experiment uses ZL303 aluminum alloy as the base material. Prepare Na 2 Si0 3 Basic electrolyte, which consists of Na 2 Si0 3 10g / L,Na 2 WO 4 2g / L, NaOH 2g / L, H 2 0 2 4 ml / L, and then add ZnO to the corresponding electrolyte in a certain proportion. The amount of ZnO added is shown in Table 1.

[0017] Table 1 List of samples of mixed additives

[0018] Sample serial number Nano ZnO additive content (g / L) 0 # 0 1 # 2 2 # 3 3 # 4 4 # 2 5 # 3 6 # 4 7 # 2 8 # 3 9 # 4

[0019] The experiment was carried out by self-made double-pulse micro-arc oxidation equipment. The experimental voltage is 550V, the time is 50 minutes, the frequency is 400Hz, and the duty cycle is 30%. During the experiment, the temperature of the solution was kept at about 30°C.

[0020] Measure the average thickness of the ceramic layer with a TT230 cladding thickness gauge: measure the thickness of 5 points on...

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Abstract

The invention discloses a method for improving corrosion resistance of a ZL303 aluminum alloy film. According to the method, a micro-arc oxidization electrolyte comprises 10g / L of Na2SiO3, 2g / L of Na2WO4, 2g / L of NaOH and 4ml / L of H2O2, a zinc oxide composite additive is added into the micro-arc oxidization electrolyte, and the nano concentration of the zinc oxide composite additive is 3g / L. After being added into the micro-arc oxidization electrolyte, the zinc oxide composite additive can join the micro-arc oxidization reaction and is deposited into the micro-arc oxidization ceramic layer, the microcracks on the surface of a micro-arc oxidization film can be reduced after the addition of the zinc oxide composite additive, the thickness and the hardness of the surface of the film can be increased, and the corrosion resistance of the micro-arc oxidization film can be enhanced.

Description

technical field [0001] The invention relates to a method for improving the corrosion resistance of a ZL303 aluminum alloy film layer, and belongs to the technical field of ZL303 aluminum alloy performance optimization. Background technique [0002] Micro-arc oxidation technology refers to a new technology for in-situ growth of ceramic layers on the surface of aluminum, magnesium, titanium and other light metals and their alloys, and has become one of the research hotspots at home and abroad. The film layer prepared by this technology on the surface of aluminum alloy is firmly combined with the substrate and has a compact structure, thereby greatly improving the hardness, wear resistance and corrosion resistance of the aluminum alloy surface. Nano zinc oxide has high specific surface area and high activity, which can improve the wear resistance and mechanical strength of rubber products. Lanthanum ions have larger ionic radius, higher charge, and stronger complexation abilit...

Claims

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Application Information

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IPC IPC(8): C25D11/06
CPCC25D11/06
Inventor 罗伟
Owner 罗伟
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