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Preparation method of titanium alloy surface sol-gel conversion film

A technology of conversion film and titanium alloy, which is applied to the device for coating liquid on the surface, pretreatment surface, coating, etc., can solve the problems such as the decrease of the stability of the sol system, and achieve good binding force, excellent film-forming performance, extended The effect of construction time

Active Publication Date: 2011-06-01
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only that, the produced polymers are generally difficult to decompose into small molecules through rehydrolysis reaction, so these polymers existing in the sol, as long as the external conditions are ripe, may cause the polymerization reaction to continue and reduce the stability of the sol system

Method used

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  • Preparation method of titanium alloy surface sol-gel conversion film
  • Preparation method of titanium alloy surface sol-gel conversion film
  • Preparation method of titanium alloy surface sol-gel conversion film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) Pretreatment of titanium alloy samples

[0041] The pretreatment of titanium alloy samples is carried out according to the regulations in the navigation mark HB / Z 347-2002 "Titanium and Titanium Alloy Anodizing Process" or US Patent 4,614,607.

[0042] 2) Sol preparation

[0043] First, pour 120ml of absolute ethanol and 280ml of deionized water into a 500ml beaker, and stir evenly at room temperature (magnetic stirring speed 500-1000rpm), to obtain the mixed solvent 1. Slowly pour 28ml of γ-glycidyl etheroxypropyltrimethoxysilane into the above mixed solvent 1, and stir in closed state for about 45-60min to obtain organosiloxane sol 2.

[0044] At the same time, pour 7ml of glacial acetic acid and 14ml of zirconium n-propoxide (75%) into a 100ml beaker in turn, and magnetically stir (500-1000rpm) at room temperature for about 30min to obtain a mixture 3 of organometallic alkoxide and organic acid.

[0045] Under vigorous stirring (rotating speed 1200-1600rpm), slo...

Embodiment 2

[0055] 1) Pretreatment of titanium alloy samples

[0056] The pretreatment of titanium alloy samples is carried out according to the regulations in the navigation mark HB / Z 347-2002 "Titanium and Titanium Alloy Anodizing Process" or US Patent 4,614,607.

[0057] 2) Sol preparation

[0058] First, pour 80ml of absolute ethanol and 320ml of deionized water into a 500ml beaker, and stir evenly at room temperature (magnetic stirring speed 500-1000rpm), to obtain the mixed solvent 1. Slowly pour 28ml of γ-glycidyl etheroxypropyltrimethoxysilane into the above mixed solvent 1, and stir in closed state for about 45-60min to obtain organosiloxane sol 2.

[0059] At the same time, pour 7ml of glacial acetic acid and 14ml of zirconium n-propoxide (75%) into a 100ml beaker in turn, and magnetically stir (500-1000rpm) at room temperature for about 30min to obtain a mixture 3 of organometallic alkoxide and organic acid.

[0060] Under vigorous stirring (rotating speed 1200-1600rpm), slow...

Embodiment 3

[0070] 1) Pretreatment of titanium alloy samples

[0071] The pretreatment of titanium alloy samples is carried out according to the regulations in the navigation mark HB / Z 347-2002 "Titanium and Titanium Alloy Anodizing Process" or US Patent 4,614,607.

[0072] 2) Sol preparation

[0073] First, pour 200ml of absolute ethanol and 200ml of deionized water into a 500ml beaker, and stir evenly at room temperature (magnetic stirring speed 500-1000rpm), to obtain the mixed solvent 1. Slowly pour 28ml of γ-glycidyl etheroxypropyltrimethoxysilane into the above mixed solvent 1, and stir in closed state for about 45-60min to obtain organosiloxane sol 2.

[0074] At the same time, pour 7ml of glacial acetic acid and 14ml of zirconium n-propoxide (75%) into a 100ml beaker in turn, and magnetically stir (500-1000rpm) at room temperature for about 30min to obtain a mixture 3 of organometallic alkoxide and organic acid.

[0075] Under vigorous stirring (rotating speed 1200-1600rpm), slo...

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Abstract

The invention provides a preparation method of a titanium alloy surface sol-gel conversion film layer. In the sol-gel preparation method, the mixture of lower alcohol and water is taken as a solvent, organic siloxane and organic metal alkoxide which comprise organic functional groups are taken as precursors, organic acid is taken as a catalyst, dip coating is taken as a coating mode, and a prepared film layer can enhance the bonding force between a titanium alloy and an organic primer or a bonding agent. The mixture of the lower alcohol and water is taken as the solvent, so that problems of inflammability, safety, volatility and the like of a pure alcohol solvent and problems such as poor sol stability and short working life of a pure water solvent are solved. In the method, the mixture of the lower alcohol and water is taken as the solvent, so that the prepared sol can be kept clarified and transparent for a long time, and the film layer which is obtained by coating within at least one month is uniform and flat and has high bonding force.

Description

technical field [0001] The invention relates to a preparation technology of a metal surface conversion film, more particularly, the metal material is titanium alloy, and the preparation method of the conversion film adopts a sol-gel method in which a mixture of lower alcohol and water is used as a solvent. Background technique [0002] Titanium alloy materials are widely used in aviation, aerospace, construction, automobile and many other industrial fields. In order to achieve certain protection or functional requirements, such as corrosion resistance, smoothness, color, etc., it is necessary to coat an organic primer or adhesive on the surface of the titanium alloy. The key and prerequisite for achieving protection or function needs is to ensure reliable, long-term, and firm combination of organic primer or adhesive with the titanium alloy surface. At present, the methods used to enhance the binding force between the organic primer or the adhesive and the surface of the ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D183/06C09D183/08C09D7/00C09D7/12B05D1/18B05D3/00
Inventor 刘建华詹中伟于美李松梅王强
Owner BEIHANG UNIV
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