Preparation method of anti-corrosion film

A corrosion-resistant film and film technology, which is applied to the surface coating liquid device, special surface, pre-treated surface, etc., can solve the problems of aging degradation, loss of silver protection, etc., to achieve good corrosion resistance and prolong corrosion resistance time, the effect of reducing energy consumption

Inactive Publication Date: 2019-03-29
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the protective film formed by this anti-silver discoloration agent will still undergo aging and degradation behavior under the combined action of light, water vapor and air, and lose its protective effect on silver pieces.

Method used

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  • Preparation method of anti-corrosion film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Add 121.36g tetraethyl orthosilicate, 486g dehydrated ethanol and 1214g deionized water in order, after mixing uniformly, stir at room temperature for 60 minutes to carry out hydrolysis to obtain an organic solution of tetraethyl orthosilicate;

[0041] (2) 17.76g of boric acid was added to the organic solution of ethyl orthosilicate, and stirred at room temperature for 20 minutes to obtain a transparent solution A;

[0042] (3) Slowly add 775g of bismuth nitrate solution with a mass concentration of 10% in solution A, stir and mix for 120 minutes at room temperature to obtain a transparent intermediate;

[0043] (4) Take out after immersing the silver piece in the intermediate for 30 seconds, place the silver piece in a ventilated place for 24 hours, and form an intermediate layer on the surface of the silver piece;

[0044] (5) Carrying out heat treatment to the intermediate layer, the heat treatment includes heating the temperature from room temperature to 250°C ...

Embodiment 2

[0046] (1) Add 121.5g tetraethyl orthosilicate, 486g absolute ethanol and 1215g deionized water in sequence, after uniform mixing, stir at room temperature for 50 minutes for hydrolysis to obtain an organic tetraethyl orthosilicate solution;

[0047] (2) 26.6g of boric acid was added to the organic solution of ethyl orthosilicate, and stirred at room temperature for 15 minutes to obtain a transparent solution A;

[0048] (3) Slowly add 775g of bismuth nitrate solution with a mass concentration of 10% in solution A, stir and mix for 100 minutes at room temperature to obtain a transparent intermediate;

[0049] (4) Take out after soaking the silver piece in the intermediate for 20 seconds, put the silver piece in a ventilated place for 22 hours, and form an intermediate layer on the surface of the silver piece;

[0050] (5) Carrying out heat treatment to the intermediate layer, the heat treatment includes heating the temperature from room temperature to 300°C at a rate of 3°C / mi...

Embodiment 3

[0052] (1) Add 121.36g tetraethyl orthosilicate, 486g dehydrated ethanol and 1214g deionized water in order, after uniform mixing, stir at room temperature for 70 minutes for hydrolysis to obtain an organic solution of tetraethyl orthosilicate;

[0053] (2) 17.76g of boric acid was added to the organic solution of ethyl orthosilicate, and stirred at room temperature for 25 minutes to obtain a transparent solution A;

[0054] (3) Slowly add 852 g of bismuth nitrate solution with a mass concentration of 10% in solution A, stir and mix for 140 minutes at room temperature to obtain a transparent intermediate;

[0055] (4) Take out after soaking the silver piece in the intermediate for 40 seconds, place the silver piece in a ventilated place for 26 hours, and the intermediate layer is formed on the surface of the silver piece;

[0056] (5) Carrying out heat treatment to the intermediate layer, the heat treatment includes heating the temperature from room temperature to 250°C at a r...

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Abstract

The invention discloses a preparation method of an anti-corrosion film. The preparation method comprises the following steps that (1), boric acid and tetraethyl orthosilicate solutions are mixed to obtain a solution A; (2), the solution A is mixed with bismuth nitrate to obtain an anti-corrosion intermediate body; (3), the intermediate body is filmed to obtain an intermediate body film; and (4), the intermediate body film is subjected to heat treatment, and is heated firstly and then cooled to obtain the anti-corrosion film. The corrosion resistance time of the anti-corrosion film is prolonged, and the higher corrosion resisting effect is achieved.

Description

technical field [0001] The invention relates to a preparation method of an inorganic thin film, in particular to a preparation method of a corrosion-resistant thin film. Background technique [0002] Silver is a precious metal material with a long history of use. The use of silver first started from making jewelry, and it is widely used in the manufacture of currency, tableware, handicrafts and decorations. When silver and its alloys are used in the atmospheric environment, due to the polluting gases contained in the atmosphere, such as hydrogen sulfide, sulfur dioxide, nitrogen dioxide, hydrogen chloride and ozone, etc., an electrolyte will be formed on the surface of the silver to cause atmospheric corrosion, making the silver A dark adhesive film is produced on the surface, which is manifested by the discoloration of silver, which affects the appearance and use of silver jewelry. [0003] Currently common anti-tarnish measures for silver are divided into two categories: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24B05D5/00B05D3/02C03C3/064
CPCB05D3/0254B05D5/00B05D7/24C03C3/064
Inventor 黄前军代林涛蒋朝金李环李贵谭霖谢兆凤
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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