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Pre-treatment sol solution used for surface of aviation titanium alloy material and sol-gel coating formed by pre-treatment sol solution

A technology of surface treatment and sol solution, which is applied in the direction of metal material coating process, coating, solid state chemical plating, etc., can solve the problems that are rarely reported, and achieve high utilization rate, abrasion resistance and scratch resistance, The effect of the simple processing method

Inactive Publication Date: 2014-06-11
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]After searching the existing literature and patents, it was found that the sol-gel conversion coating technology is used in the research of surface conversion coating of steel, aluminum alloy and magnesium alloy More, ProgressinOrganicCoating, 64(2009), 327-338 reported that the sol-gel technology is used for a large amount of research work on pretreatment conversion coatings and anti-corrosion coatings of substrates such as various steels, aluminum alloys, copper and magnesium alloys , but this method is rarely reported for the surface pretreatment of titanium alloys

Method used

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  • Pre-treatment sol solution used for surface of aviation titanium alloy material and sol-gel coating formed by pre-treatment sol solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Preparation of sol solution

[0052] Mix 10 milliliters of tetraethyl orthosilicate, 50 milliliters of vinyltriethoxysilane, 570 milliliters of ethanol, 1 wt% acetic acid and an appropriate amount of deionized water in a total of 1000 milliliters and stir for 10 seconds to 1 hour; The rest time is 30 minutes to 1.5 hours in total. Filter the sol solution with a slow quantitative filter paper in the laboratory, and transfer it to a clean container for airtight storage until use.

[0053] 2. The sol is applied to the base material (the following description takes the implementation on the titanium alloy Ti-6Al-4V sample as an example)

[0054] 2.1 Surface cleaning and activation of matrix materials:

[0055] Fully polish the sample with sandpaper, wash the surface of the sample with tap water and detergent; soak the sample with alkaline detergent at room temperature for 10 minutes to remove the grease on the surface of the sample, and clean the sample with tap water ...

Embodiment 2

[0062] 1. Preparation of sol solution

[0063] 10 milliliters of tetraethyl orthosilicate and 40 milliliters of 3-glycidyl propyl triethoxysilane and 600 milliliters of ethanol and 0.5wt% acetic acid and a total of 1000 milliliters of deionized water were mixed and stirred for 10 seconds to 1.5 hours and standing, stirring plus standing time totals 20 minutes to 2 hours. Filter the sol solution with a slow quantitative filter paper in the laboratory, and transfer it to a clean container for airtight storage until use.

[0064] 2. The sol is applied to the base material (the following description takes the implementation on the titanium alloy Ti-6Al-4V sample as an example)

[0065] 2.1 Surface cleaning and activation of matrix materials:

[0066] Fully polish the sample with sandpaper, wash the surface of the sample with tap water and detergent; soak the sample with alkaline detergent at room temperature for 10 minutes to remove the grease on the surface of the sample, and c...

Embodiment 3

[0073] 1. Preparation of sol solution

[0074] Mix 20 milliliters of tetraethyl orthosilicate, 30 milliliters of vinyltriethoxysilane, 750 milliliters of n-propanol, 0.5 wt% citric acid and an appropriate amount of deionized water in a total of 1000 milliliters and stir for 10 seconds to 1 hours; a total of 30 minutes to 1.5 hours of stirring plus resting time. Filter the sol solution with slow quantitative filter paper in the laboratory, transfer it to a clean container and keep it airtight until use.

[0075] 2. The sol is applied to the base material (the following description takes the implementation on the titanium alloy Ti-6Al-4V sample as an example)

[0076] 2.1 Surface cleaning and activation of matrix materials:

[0077] Fully polish the sample with sandpaper, wash the surface of the sample with tap water and detergent; soak the sample with alkaline detergent at room temperature for 10 minutes to remove the grease on the surface of the sample, and clean the sample ...

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Abstract

The invention discloses pre-treatment sol solution used for surface of an aviation titanium alloy material and a sol-gel coating formed by the pre-treatment sol solution. The sol solution used for surface treatment of the aviation titanium alloy material disclosed by the invention comprises the following components: (a) 0.1-5wt% of tetraethoxysilane; (b) 1-10wt% of at least one organo-siloxane; (c) 0.1-5wt% of catalyst selected from carboxylic acid, ethanolamine, triethylamine or mixture of the carboxylic acid, ethanolamine and triethylamine; (d) 45-93wt% of non-toxic harmless organic solvent, alcohol preferably, fatty alcohol with 1-10 carbon atoms more preferably; and (e) the balance of deionized water. By applying the sol solution disclosed by the invention to treat the surface of a substrate, a sol-gel coating with compact net structure can be formed on the surface of a titanium alloy substrate.

Description

technical field [0001] The invention relates to the field of titanium alloy surface treatment, in particular to a sol-gel coating and a treatment method for improving the bonding force between a titanium alloy base material and a primer for the surface of an aerospace titanium alloy material. Background technique [0002] Because titanium and titanium alloys have high strength, low density and good corrosion resistance, they are more and more widely used in defense industries such as aviation, aerospace, shipbuilding, automobiles, and nuclear power. At present, the demand for titanium alloys in the aviation industry has accounted for nearly half of the world's total titanium materials, and the proportion of composite materials and titanium materials is gradually expanding. However, titanium alloys also have some defects, such as poor wear resistance, poor high temperature resistance, poor weldability, and poor bonding with organic coatings. In order to improve and enhance t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C20/00
Inventor 苏跃增刘萍苏婧琪
Owner SHANGHAI JIAOTONG UNIV
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