Aluminum alloy anode oxide film nickel-free hole sealing agent and preparing method thereof

An anodized film, aluminum alloy technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve antibacterial, corrosion resistance, heat resistance, salt spray resistance, wear resistance, oxidation resistance Poor toughness, hardness, shrinkage affect sealing, poor sealing of oxide film voids, etc., to achieve low cost, improve SO42-interference, and improve the effect of sealing

Inactive Publication Date: 2015-12-30
MAANSHAN JIECHUANG PLASTIC TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this process still has shortcomings, anti-SO 4 2- The interference is poor, and the permeability is not good, the gap sealing performance of the bottom layer of the oxide film is not good, and there are also poor performances such as antibacterial, corrosion resistance, heat resistance, salt spray resistance, wear resistance, and oxidation resistance. In addition, the toughness, hardness, and shrinkage of the sealant will also affect the sealability, which needs to be improved

Method used

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Embodiment Construction

[0011] A nickel-free sealing agent for aluminum alloy anodized film, made of the following raw materials in parts by weight (kg): magnesium acetate 8, triethanolamine 19, ammonium acetate 3, deionized water, borax 0.1, nanocrystalline cellulose 0.2 , Nano-alumina 0.6, lithium silicate 0.4, dodecafluoroheptylpropyltrimethoxysilane 2.6, tetrabutyl titanate 1, ethanol 45, ammonia 8.6, fluorine-containing surfactant 0.3.

[0012] The preparation method of the nickel-free aluminum alloy anodized film comprises the following steps:

[0013] (1) Mix tetrabutyl titanate and ethanol, stir to obtain tetrabutyl titanate ethanol solution, mix lithium silicate, dodecafluoroheptylpropyltrimethoxysilane, and fluorine-containing surfactant, add 5 wt. A portion of water was stirred evenly to obtain a solution, and the solution was dripped into the tetrabutyl titanate ethanol solution under stirring, and stirred for 1.5 h under the condition of 250 r / min to obtain a mixture, and then ammonia wa...

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Abstract

The invention discloses an aluminum alloy anode oxide film nickel-free hole sealing agent. The hole sealing agent is prepared from, by weight, 8-8.5 parts of magnesium acetate, 19-20 parts of triethanolamine, 3-3.2 parts of ammonium acetate, a proper amount of deionized water, 0.1-0.2 part of borax, 0.2-0.3 part of nanometer crystalline cellulose, 0.6-0.7 part of nanometer aluminum oxide, 0.4-0.5 part of lithium metasilicate, 2.6-2.8 parts of dodecafluoroheptylpropyltrimethoxysilane, 1-1.2 parts of tetrabutyl titanate, 45-48 parts of ethyl alcohol, 8.6-9 parts of ammonium hydroxide and 0.3-0.4 part of fluorine-containing surfactant. Tetrabutyl titanate is used for forming nanometer titanium dioxide, lithium metasilicate, dodecafluoroheptylpropyltrimethoxysilane and fluorine-containing surfactant are used at the same time, and by means of reaction, permeability, cohesiveness and hydrophobicity of the hole sealing agent can be improved; by using borax, nanometer crystalline cellulose and nanometer aluminum oxide, lubricity and wear resistance of an oxidation film are improved.

Description

technical field [0001] The invention relates to the technical field of a nickel-free sealing agent for anodized aluminum alloy films, in particular to a nickel-free sealing agent for anodized aluminum alloy films and a preparation method thereof. Background technique [0002] At present, aluminum and its alloys generally use anodic oxidation surface protection technology to form a certain thickness of oxide film on the surface of aluminum and its alloys. Since there are a large number of micropores on the surface of the oxide film, appropriate sealing treatment must be carried out. The common sealing methods are mainly Boiling water (or steam) sealing, nickel salt sealing, polymer resin sealing. The boiling water (or steam) sealing method has high energy consumption and cannot meet the requirements for higher corrosion resistance; the commonly used nickel salt sealing agent contains Ni 2+ , F － It is toxic to the human body and the environment, and its dissolution rate is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/18
Inventor 吴传兴
Owner MAANSHAN JIECHUANG PLASTIC TECH CO LTD
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