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High-corrosion-resistance marine aluminum alloy surface metal-organic skeleton film treatment liquid and using method thereof

A technology of aluminum alloy surface and organic framework, which is applied in the coating process of metal materials, etc., can solve the problems of paint or powder adhesion performance decline and film layer difference, so as to avoid the limitation of batch production, improve corrosion resistance and Adhesion, the effect of optimizing the film-forming effect

Active Publication Date: 2018-07-27
广东省珠海市质量计量监督检测所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conversion layer obtained by this method is prone to significant differences in the film layer due to changes in ambient temperature and processing time during production, and its adhesion to paint or powder will be reduced.

Method used

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  • High-corrosion-resistance marine aluminum alloy surface metal-organic skeleton film treatment liquid and using method thereof
  • High-corrosion-resistance marine aluminum alloy surface metal-organic skeleton film treatment liquid and using method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A metal-organic framework film treatment solution on the surface of a high corrosion-resistant marine aluminum alloy, the treatment solution is prepared from the following components: 1000ppm fluozirconic acid with a concentration of 45%, 600ppm fluotitanic acid with a concentration of 50%, difluorotitanic acid Manganese chloride 30ppm, glucose 400ppm, concentration of 50% sodium sulfate 10ppm, the balance is water. Adjust the pH value of the treatment solution to 4.

[0026] In this embodiment, the method of using the metal-organic framework film treatment liquid on the surface of the high corrosion-resistant marine aluminum alloy is used to form a framework film on the surface of the marine aluminum alloy. The specific preparation process is as follows:

[0027] (1) Polish the surface of the aluminum alloy with silicon carbide water sandpaper until the surface roughness is below 10 μm, soak it in an acidic degreasing and degreasing aqueous solution for 6 minutes, then...

Embodiment 2

[0031] A metal-organic framework film treatment solution on the surface of a high-corrosion-resistant marine aluminum alloy. The treatment solution is prepared from the following components: 100 ppm of fluorozirconic acid with a concentration of 45%, 800 ppm of fluorotitanic acid with a concentration of 50%, difluoro Manganese chloride 90ppm, glucose 100ppm, concentration of 50% sodium sulfate 10ppm, the balance is water. Adjust the pH value of the treatment solution to 3.

[0032] In this embodiment, the method of using the metal-organic framework film treatment liquid on the surface of the high corrosion-resistant marine aluminum alloy is used to form a framework film on the surface of the marine aluminum alloy. The specific preparation process is as follows:

[0033] (1) Polish the surface of the aluminum alloy with silicon carbide water sandpaper until the surface roughness is below 10 μm, soak it in an acid degreasing and degreasing aqueous solution for 3 minutes, rinse i...

Embodiment 3

[0037] A metal-organic framework film treatment solution on the surface of a high corrosion-resistant marine aluminum alloy, the treatment solution is prepared from the following components: 1200ppm of fluorozirconic acid with a concentration of 45%, 200ppm of fluorotitanic acid with a concentration of 50%, difluoro Manganese chloride 100ppm, glucose 500ppm, concentration of 50% sodium sulfate 20ppm, the balance is water. Adjust the pH value of the treatment solution to 6.

[0038] In this embodiment, the method of using the metal-organic framework film treatment liquid on the surface of the high corrosion-resistant marine aluminum alloy is used to form a framework film on the surface of the marine aluminum alloy. The specific preparation process is as follows:

[0039] (1) Polish the surface of the aluminum alloy with silicon carbide water sandpaper until the surface roughness is below 10 μm, soak it in an acid degreasing and degreasing aqueous solution for 2 minutes, rinse i...

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Abstract

The invention relates to the technical field of metal surface treatment, in particular to a high-corrosion-resistance marine aluminum alloy surface metal-organic skeleton film treatment liquid and a using method thereof. The treatment liquid is prepared from the following components of 25-1600 ppm of hexafluorozirconic acid with the concentration being 45%, 12.5-1000 ppm of hexafluorotitanic acidwith the concentration being 50%, 5-120 ppm of manganese difluoride, 25-600 ppm of glucose, 5-40 ppm of sodium sulfate with the concentration being 50%, and the balance water. The aluminum alloy surface is coated with the treatment liquid to form a metal-organic skeleton film. According to the metal-organic skeleton film treatment liquid, metal ions are provided through the hexafluorozirconic acidand the hexafluorotitanic acid, organic unsaturated bonds are provided through the glucose and combined with the metal ions to form a skeleton, adhesion precipitation of aluminum oxides is facilitated, film forming is easy, the corrosion resistance and the adhesion of the skeleton film are improved advantageously, meanwhile, chromium-free raw materials are adopted, and the environmental protection and pollution-free effects are achieved.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a metal-organic framework film treatment solution for a highly corrosion-resistant marine aluminum alloy surface and a method for using the same. Background technique [0002] Due to its good corrosion resistance, aluminum alloy sheets are widely used in electronic production, aviation, building materials, machinery, ships and other fields. However, due to the long-term humid environment when used in ships, the surface of aluminum alloys is easily corroded. Chromate is used as a corrosion inhibitor and is applied to the surface treatment of aluminum alloys. Improve the aluminum alloy by directly contacting the chromium-containing treatment liquid such as chromic acid-chromate with the surface of the metal material, so that it can precipitate a chromate film, or apply it to the metal surface, and dry it to precipitate a chromate film. Corrosion resistance of the a...

Claims

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Application Information

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IPC IPC(8): C23C22/34
CPCC23C22/34
Inventor 张凯骆亍
Owner 广东省珠海市质量计量监督检测所
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