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Surface treatment method used for nickel-free sealing after aluminum or aluminum alloy anode oxidation

An anodic oxidation and surface treatment technology, which is applied in the field of aluminum or aluminum alloy, can solve the problems of harmfulness to the human body and the environment, and achieve the effect of enhancing corrosion resistance and reducing the harm to the human body

Inactive Publication Date: 2018-08-24
湖北安登环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are many kinds of cold sealing and heat sealing treatment agents on the market, but most of them adopt the unified nickel sealing treatment method. The traditional sealing process contains heavy metal nickel and cobalt, which are harmful to human body and environment. With the environmental awareness With the continuous enhancement of the industry, everyone began to abandon the nickel-containing sealant, and needed a nickel-free sealing treatment method

Method used

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  • Surface treatment method used for nickel-free sealing after aluminum or aluminum alloy anode oxidation

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Experimental program
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Effect test

Embodiment 1

[0044] The content of each raw material in the nickel-free sealed aqueous reaction solution is: (NH4)2ZrF64.5g / l, boric acid 0.8g / l, Na2HPO40.6g / l, NH4HF21.0g / l, thiourea dioxide 3.0g / l, sodium oleate The mass ratio to water is 1‰, and the balance is water.

Embodiment 2

[0046] The content of each raw material in the nickel-free sealed aqueous reaction solution is: (NH4)2ZrF64.5g / l, boric acid 0.6g / l, Na2HPO40.4g / l, NH4F1.0g / l, thiourea dioxide 3.0g / l, sodium oleate The mass ratio to water is 1‰, and the balance is water.

Embodiment 3

[0048] The content of each raw material in the nickel-free sealed aqueous reaction solution is: (NH4)2ZrF64.5g / l, boric acid 0.5g / l, Na2HPO40.5g / l, NH4F0.7g / l, NH4HF20.8g / l, thiourea dioxide 3.0g / l, the mass ratio of sodium oleate to water is 1‰, and the balance is water.

[0049] In summary, the invention has no pollution to the environment, reduces the harm of nickel to the human body, and enhances the corrosion resistance of aluminum or aluminum alloy anodes.

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Abstract

The invention relates to a surface treatment method used for nickel-free sealing after aluminum or aluminum alloy anode oxidation. The method includes the steps of firstly, pickling; secondly, performing anode oxidation and rinsing; thirdly, coloring and rinsing; fourthly, performing nickel-free sealing and rinsing; fifthly, drying and placing. The method is free of environment pollution, capableof reducing harm, caused by nickel, to human bodies and capable of enhancing the corrosion resistance of an aluminum or aluminum alloy anode.

Description

technical field [0001] The invention relates to the technical field of aluminum or aluminum alloy, in particular to a surface treatment method for nickel-free sealing of aluminum or aluminum alloy after anodic oxidation. Background technique [0002] Due to the excellent physical and chemical properties of aluminum and aluminum alloys, the application of aluminum and aluminum alloys in building materials, aerospace, automobiles, mobile phones and other industries has become more and more extensive. Aluminum will form a thin layer of natural oxide film in the air. This layer of naturally formed oxide film does not have good corrosion resistance and other properties, and cannot meet the needs of practical applications. At present, the industry usually adopts the aluminum anodic oxidation process. After a series of pretreatment steps such as degreasing, polishing, alkali etching and neutralization, the aluminum material is placed in an oxidizing solution such as sulfuric acid a...

Claims

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Application Information

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IPC IPC(8): C25D11/24
CPCC25D11/246
Inventor 程永青黄飞郑子明汪展波於鑫
Owner 湖北安登环保科技有限公司
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